BR112019014557B1 - METHOD FOR DETERMINING BOTTOM-HOLE PROPERTIES WITH SENSOR MATRIX, SYSTEM FOR DETERMINING BOTTOM-HOLE PROPERTIES WITH SENSOR MATRIX, AND, TUBULAR COLUMN - Google Patents

Abstract

An array of coil sensors can be deployed within a well and external to a tube string to measure the properties of a fluid in the central flow passage of the tube string. A flow port can be made in the tubular string passing from the central flow passage to the outer surface. The sensors in the coil sensor array can be covered with a shroud and placed close to the flow port, or such sensors can be isolated in a zone with packers next to the flow port. The expandable array of sensors can even obtain pressure data to calculate a flow rate of a production zone. The expandable sensor array can also be deployed in a no-flow well for close monitoring of wells.

Description

TECHNICAL FIELD

[001] This technology is directed to downhole sensors. Particularly, the present technology involves an array of sensors provided within a wellbore to determine various downhole properties.

FUNDAMENTALS OF THE INVENTION

[002] Well completion involves preparing a well for hydrocarbon production after drilling operations have been conducted. During the completion phase, production piping can be provided downhole for injection of various fluids or withdrawal of hydrocarbons. Stimulation processes may also have been carried out, including drilling or creating fractures in the formation. During completion processes, packers can be provided to isolate various zones along the length of the pipeline. These zones can isolate particular areas to facilitate the production of hydrocarbons from the fractured portions of the formation.

[003] During the completion phases, it may be desirable to measure the properties of the fluid, formation or piping at the bottom of the well. Therefore, sensors can be provided downhole at various points in the pipeline to collect data for processing.

[004] Furthermore, oilfields may contain multiple wells at various stages. Some wells may currently be drilled, under stimulation or completion, non-producing, no flow or abandoned.

BRIEF DESCRIPTION OF THE FIGURES

[005] The examples presented in this document can be better understood with reference to the following description together with the attached figures, in which similar reference numerals indicate analogous, identical or functionally similar elements. With the understanding that these figures only describe examples of the disclosure and therefore should not be considered limiting its scope, the principles in this document will be described and explained with additional specificity and detail through the use of the accompanying figures, in which: FIG. 1 is a schematic diagram of a tube string supplied into a well for completion processes; FIG. 2 is a schematic cross-sectional view of an example of a tubular column with a plurality of sensors coupled to the tubular column; FIG. 3 is a schematic cross-sectional view of another example of a tubular column with a plurality of sensors coupled to the tubular column; FIG. 4 is a schematic diagram of a tube string supplied into a well for completion processes; FIG. 5 is a schematic diagram of a tubular column with a cover for a sensor and a flow port; FIG. 6 is a schematic diagram of a tubular column with a short cover for a sensor and a flow port; FIG. 7 is a schematic diagram of a tubular column with a two-part cover; FIG. 8 is a schematic diagram of a tubular column with a cover with a clamp; and FIG. 9 is a schematic diagram of a tube string supplied into a well for completion processes; FIG. 10 is a schematic cross-sectional view of an example of a tubular column with a plurality of sensors coupled to the tubular column; FIG. 11 is a schematic cross-sectional view of another example of a tubular column with a plurality of sensors coupled to the tubular column; FIG. 12 is a flow diagram for calculating the flow rate of a production zone; FIG. 13 is a schematic diagram of an expandable sensor arrangement for monitoring an adjacent well in an oil field; and FIG. 14 is a schematic diagram of a processing device that may be used with the present disclosure.

DETAILED DESCRIPTION

[006] Various examples of disclosure are discussed in detail below. While specific implementations are discussed, it should be understood that this is done for illustrative purposes only. One skilled in the relevant art will recognize that other components and configurations may be used without departing from the spirit and scope of the disclosure. Additional features and benefits of the disclosure will be set forth in the description below, and in part will be obvious from the description or may be learned by practicing the principles disclosed in this document. The features and advantages of the disclosures can be realized and obtained through the instruments and combinations particularly pointed out in the appended claims. These and other features of the disclosure will become more apparent from the following description and appended claims, or may be learned by practicing the principles set forth herein.

[007] A set of coil sensors with several connected sensors for placement in a well is disclosed in this document. The plurality of sensors can be connected via a line, such as a tubing encased conductor (TEC). The coil sensor array can be deployed along with a tube string in a well to measure the properties of a downhole fluid such as pressure, temperature or flow rate. The array of sensors can be coupled to the tubular column. In some examples, the sensor array is attached to the outside of the production pipeline. The array of sensors can be attached to the tubular column using clamps, straps or other external attachment devices. In some cases, the plurality of sensors may only measure pressure or only measure temperature. In other examples, the sensor may be a combined pressure and temperature sensor. Pressure and temperature measurement can be used for a variety of applications that employ tube strings in the well, such as completion, stimulation or other processes. In such processes as completion, the well was divided into several production zones using packers.

[008] As provided in this document, the array of sensors can be employed to measure the properties of fluids or materials within the tubular column while being outside the surface of the tubular column. To measure the properties of the fluids within the tubular string, a flow port, also referred to as a passage, may be machined or otherwise provided in the pipeline. The flow port may extend from the central flow passage of the tubular to the outer surface. In at least one example, the flow port can be formed when piping is installed in the well. A short tube with a flow port formed in it can also be installed. When using a short tube, the flow port can be pre-formed to allow for quick assembly and flexibility in the location of the passage.

[009] One or more of the plurality of sensors in the coil assembly can be placed close enough to this flow port to measure a property of the fluid within the tubular, whether the fluid is flowing into or out of the flow port. The term "close" as used in this document refers to the sensor being close enough to the proprietary communication port enough to detect a property of the internal fluid within the central flow passage, which may be several inches or less than 1 or 2 feet, directly touching the property communicating door or within a chamber, enclosure or containment formed by the cover. A pair of zonal isolation packers can be used with the tubular string to isolate a production zone. A secondary packer can be provided between the pair of zonal isolation packers in the same area as the flow port. The secondary packer forms a sensor zone with a coil sensor array sensor and the flow port on one side of the secondary packer and the production zone on the opposite side of the secondary packer. Alternatively or additionally, the location of at least one secondary packer may be such that it is placed over a flow regulator (a flow regulator may be an inflow control device (ICD), standalone inflow control device (autonomous inflow control device, AICD), inflow control valve (ICV), choke, nozzle, deflector, restrictor, tube, valve, etc.). The location of the secondary packer is configured to allow fluid communication between the fluid in the annular space and within the central flow passage of the tubular string without exposure to the fluid in the production zone. The location of the sensor can be such that it is isolated from the production area by the secondary packer.

[0010] Alternatively or additionally, using zonal isolation packers and/or secondary packers, a shroud can be used to position the coiled sensor array next to the flow port. Particularly, a cover (or enclosure) may be provided forming a pressure barrier between the pressure sensor and the flow port in the central flow passage of the tubular string and the fluid in the annular space. Pressure is communicated from inside the completion column through the flow port (which may be an orifice or opening) to the shroud and to the pressure sensor in the sensor array. Therefore, in practice, the flow hole can be formed by deliberately making a hole in the piping and then immediately or otherwise covering such hole with a cover.

[0011] As disclosed in this document, the cover provides some flexibility, since otherwise precise control of the arrangement of the tubular column would be required in order to achieve exact alignment of the sensor and the machined sensor port. Such an alignment would be difficult because the tubular string is variable in length and the sensor array has limited ability to stretch.

[0012] The array of coil sensors disclosed in this document can also be used to measure the flow rate of a production zone in the tubular string and in the annular space. The method can be configured to measure fluid properties in the tubular string and annular space. When deploying the tubular column and coil sensor array, at least one pair of zonal isolation packers can be used to create a production zone. At least two of the plurality of sensors are located within the production zone. A first of the at least two of the plurality of sensors may be located upstream of a flow regulator and a second of the at least two of the plurality of sensors may be located downstream of the flow regulator. The method may also include receiving the first pressure data at a processor from the first of the at least two of the plurality of sensors. Additionally, the method may include receiving second processor pressure data from the second of the at least two of the plurality of sensors. Furthermore, the method can include determining, in the processor, a differential pressure based on the difference between the first pressure data and the second pressure data. The method can calculate, in the processor, a production zone fluid flow rate based on differential pressure.

[0013] The method may also include deploying the first sensor on a screen. The method may include implanting an additional flow regulator that is downstream of the initial flow regulator and having a third sensor implanted downstream of the additional flow regulator.

[0014] In addition to the above, the coil sensor array can be employed for measuring properties within a well without a tubular column, for example, the coil sensor array can be used to measure the pressure profile in a well no flow. In this case, the array can be used to monitor stimulation treatments in nearby wells. Therefore, the assembly can be placed in a monitoring well with no production flow. Therefore, all pressure variations can be attributed to the effects of stimulation treatments on nearby wells.

[0015] FIG. 1 is a schematic diagram representing an environment in which the present disclosure can be implemented. Environment 1, in this case a completion, includes a tubular column 22 for use in completing and stimulating training. The terms stimulation and injection as used in this document include fracking, acidification, hydraulic work and other work. The tubular column 22 can be made up of several individual tubulars, also referred to as sections or joints. Sections can include multiple assemblies, as well as empty pipe, perforated pipe, shrouds, gaskets, etc., as they are known in the industry. Each tubular of tubular string 22 may have a central flow passage, an internal fluid and an external surface. The term "tubular" may be defined as one or more types of connected tubulars as known in the art, and may include, but is not limited to, drill pipe, laying string, piping, production piping, hinged piping, coiled piping , coatings, liners, combinations thereof or the like.

[0016] A well 13 extends through several earth layers. Well 13 has a substantially vertical section 11, the upper portion of which has casing 17 installed and held in place by cement 19. Well 13 also has a substantially offset section 18, shown as horizontal, which extends through an underground formation with hydrocarbons 20. As illustrated, the substantially horizontal section 18 of the well 13 is an open hole 12, so that there is no casing. It is understood that the well may be casing or open, vertical, horizontal or deviated, etc.

[0017] The zonal isolation packers 26 are divided by training target zones 20. The packers 26 isolate the target zones that may have fractures 35 for stimulation and production. The packers 26 can be expandable packers, however, they can be other types of packers as they are known in the industry, for example slide-out, expandable or inflatable packers. Additional downhole tools or devices may also be included in the work string, such as valve assemblies, e.g. on the valve, safety valves, inflow control devices, check valves, etc. Pipe sections between packers 26 may include sand screens 50 to prevent formation particles from entering as hydrocarbons are drawn off.

[0018] As shown, an array of sensors 100 is expandable from the coil 105. The array of sensors 100 is shown as having a line 110 connecting each of the individual sensors 101. Data from the sensors 101 may be transmitted along from line 110 and provided to one or more surface processors, such as device 200 discussed further below. The line 110 can be a cable, line, metal and can be conductive and allow power and data to be transferred through the line 110 between each of the sensors 101 and to the surface. Line 110 can be malleable enough to allow for coiling and some amount of bending, but also rigid enough to maintain a given shape in the absence of external force.

[0019] The sensor array 100 as disclosed herein can measure at least one of temperature, pressure or any other suitable property. Sensors 101 can be any number of different types of sensors. In at least one example, the sensor may be a combined pressure and temperature sensor. The sensor can be a resonance based pressure sensor or a voltage based pressure sensor. Resonance-based pressure sensor, such as quartz pressure sensors, measure the change in frequency in an oscillator as the hydrostatic pressure changes. A stress-based pressure sensor measures the deflection of a structure due to a differential pressure between hydrostatic pressure and an air chamber.

[0020] The sensor array can be a coil construction that is a pre-welded assembly attached to the outside of the completion column with fasteners such as mechanical clamps, tapes or staples.

[0021] A completion is divided into production zones using 26 packers. The production flow comes from the formation, through a screen, through a flow regulator (ICD, AICD, ICV, choke, nozzle, deflector, restrictor, tube, valve, etc.) and into the pipeline.

[0022] As disclosed herein, a flow opening 30 is formed in the tubular column. A secondary packer 25 is located between zonal isolation packers 26. The secondary packer 25 forms a production zone 37 that does not include the flow port 30 and a sensor zone 36 that includes the flow port 30. A sensor 101 is located within sensor zone 36 and another sensor 101 is located within production zone 37. Sensor 101 which is located within sensor zone 36 is configured to measure properties of the fluid within central flow passage 33. Thus, at at least one of the plurality of sensors 101 is located on either side of the at least one secondary packer 25. As illustrated, there are two secondary packers 25.

[0023] As illustrated, there may be one or more production zones 37 and one or more corresponding sensor zones 36. In at least one example, there is a secondary packer 25 that corresponds to each production zone 37, so that there is at least one at least one sensor zone 36 for each production zone 37. In other examples, there may be multiple sensor zones 36 for each production zone 37.

[0024] FIG. 2 is a schematic cross-sectional view of a schematic example of a tubular column in accordance with the present disclosure. As illustrated, there are two flow ports 30, 32 that are formed within the tubular column 22. In other examples, there may be one, two or more than two flow ports formed within the tubular column 22. The flow ports 30, 32 may also be referred to in this document as a proprietary communication port or sensor port. As illustrated, flow ports 30, 32 are opposite one another in tube string 22. In other examples, flow ports 30, 32 can be positioned along tube string 22 as desired. Production fluid may flow through fractures 35 (which may be boreholes) and through screen 50 and into central flow passage 33, then flowing out of flow ports 30, 32. In at least one example, a screen 50 may not be provided.

[0025] The tubular column 22 has a sensor zone 36 in which the tubular column 22 forms flow ports 30, 32 through an outer surface 31 between one of the pair of zonal isolation packers 26 and the secondary packer 25. outer surface 31, as used herein, refers to the outer surface of the tubular string 22 that is spaced from the central flow passage 33. One of the plurality of sensors 101 is located within the sensor zone 36 and is operable to detect properties of fluid within the central flow passage 33. In at least one example, the plurality of sensors 101 may be located beyond the outer surface 31. As illustrated, the plurality of sensors 101 may be located in the annular space formed between the outer surface 31 and the surrounding casing, borehole or piping. As illustrated, the sensor of the plurality of sensors 101 can be located substantially close, i.e., close to the flow ports 30, 32. As used herein, "substantially close" refers to a distance that allows fluid to flow easily. from the flow ports 30, 32 to the sensor of the plurality of sensors 101. In at least one example, the sensor of the plurality of sensors 101 may be located within less than one inch of the flow ports 30, 32. In another example, the sensor of the plurality of sensors 101 can be located between one and fifteen inches from the flow ports 30, 32. In another example, the sensor of the plurality of sensors 101 can be located over the flow ports 30, 32. " refers to being radially outward from the passage in approximately the same axial position as the passage. In at least one instance being "over" means the packer is no longer above or below the pass.

[0026] FIG. 3 is a schematic cross-sectional view of another example of a tubular column with a plurality of sensors 101 coupled to the tubular column. The secondary packer 25, as illustrated, is located over a flow regulator 40. The flow regulator 40 can be one of an ICD, AICD, ICV, choke, mouthpiece, baffle, restrictor, tube or valve. As illustrated by the dotted arrow in FIG. 3, flow from the production zone 37 flows through one of several sensors 101 to a screen 50. Various suitable sand screens include wire mesh, coiled wire screens, perforated or grooved pipe, perforated covers, porous metal membranes or other screens that allow the flow of desirable fluids such as hydrocarbons and filter and prevent the entry of undesirable particulates such as sand. The fluid flow is then directed through a flow regulator 40. The production zone 37 is isolated from the sensor zone 36 by the secondary packer 25. The fluid then passes through a sensor 101 which is located in the sensor zone 36 in a of flow ports 30, 32. While two flow ports are illustrated, the present disclosure may include a plurality of flow ports or a single flow port.

[0027] The sensor 101 that is located in the production zone 37 is configured to measure the properties of the fluid in the annular space formed between the tubular column 22 and the casing 17. One sensor of a plurality of sensors 101 is located within a zone of sensor 36 and measures the properties of fluid flow through the flow regulator 40 to the flow ports 30, 32. Due to the flow ports 30, 32, the pressure in the annular space in the zone 36 is substantially the same as within the central flow passage 33 of tubular column 22.

[0028] Whereas FIGS. 1 to 3 illustrate isolating flow ports 30, 32 through packers, such flow ports may also be insulated by use of covers. FIG. 4 is a schematic diagram representing an embodiment 2 in which the present disclosure can be implemented. Reference numerals in FIG. 4 repeated from FIG. 1 refer to the same features. In FIG. 4, completion 2 includes a tubular column 22 for use in training completion and stimulation and an annular space 41. Packers 26 traverse training target zones. Packers 26 isolate target zones for stimulation and production which may include fractures 35. Sensor array 100 is expandable from coil 105. Sensor array 100 is shown as having a line 110 connecting each of the individual sensors 101 .

[0029] With regard to the tubular column 22, a flow port, also referred to herein as a proprietary communication port or sensor port, is added to the completion pipeline and a cover is provided around the sensor 101 ( such as pressure or temperature sensor) in sensor array 100. This concept is shown in FIG. 5, which is a schematic diagram illustrating a cover (or cover) 315 used to cover both a sensor 305, which may be a pressure gauge or temperature sensor, and a flow port 320. While FIG. 5 illustrates a flow port 320, the tubular column may include more than one flow port 320. The sensor 305 may be a pressure gauge or temperature sensor, for example. Flow port 320 may be an orifice or aperture. Flow port 320 extends between a central flow passage 331 for passing an internal fluid and an outer surface 332. Cover 315 covers sensor 305 of sensor array 100 and covers flow port 320 in tubular 325, which is illustrated in FIG. 5 as the completion pipe. Flow port 320 or orifice allows internal pressure to be communicated to the annular region of the sensor zone, which is captured within shroud 315. A seal 330 allows line 310, which may be a TEC, to pass to shroud 315 while preventing inflow or outflow of fluid with the annular space. Consequently, fluid, pressure, or temperature can be transferred or communicated through flow port 320 out of tubular 325 within cover 315 without mixing with fluid from the annular space. Thus, a sensor 305 of the array of sensors 100 within the shroud 315 can sense the internal pressure or temperature while located outside the tubular 325.

[0030] In the concept shown in FIG. 5, coverage 315 is much larger than sensor 305. This allows flow port 320 in FIG. 5 is pre-machined into the tubular 325 (eg, the base tube or other tubular) and that the array of sensors 100 is a pre-welded assembly. The length of cover 315 also accommodates headspace uncertainties. In another variation, flow port 320 is not pre-machined. Thus, flow port 320 can be placed close to sensor 305. In this variation, coverage 315 can be short (eg, shorter than the length of sensor 305). This concept is illustrated in FIG. 6, which is a schematic diagram of a cover 315 wrapped around the sensor 305 and which is shorter in length than the length of the sensor 305. The sensor 305 is placed over or sufficiently close to the flow opening 320 in the tubular 325, so so as to contact or sense the fluid within the central flow passage 331 of the tubular 325. The cover 315 has a seal 330 that can be placed along or around the sensor 305 and the tubular 325 so that the fluid passing through of the flow port 320 remains within the cover 315 and prevents the flow of fluid from the annular space and mixing with fluid from the annular space. Seal 330 therefore seals the portion of sensor 305 that detects the property of fluid contacting fluid from flow port 320 rather than fluid from the annular space. For example, the sensor 305 may have one or more sensing ports 316 in a small area of the sensor 305. The sensing holes 316 may be contained in the shroud 315 and seal 330 so as to be in fluid communication with and detect the properties of flow flowing from the flow port 320, without contaminating the fluids in the annular space.

[0031] There are several methods for creating cover 415. FIG. 7 is a schematic diagram illustrating a two-part cover 415. The two cover parts 415 may be connected with a fastener 420, such as a screw, hinge, pin, solder, glue, adhesive, magnets, or any other suitable fastener. In FIG. 7, cover 415 is illustrated as a clamp that uses a pin to hold it closed. The concept can be used, for example, with the Cross Coupling Clamp, sold by Cannon. Additionally, a seal 330 is further provided in the design to seal the sensor and the fluid flow port in the annular space and create fluid communication, including pressure communication, between a sensor in the matrix and a flow port within the pipeline. A passageway 345 may be provided in the seal 330 for a row 110 of an array of sensors 100.

[0032] FIG. 8 is a schematic diagram illustrating a cross-sectional view of a cover 450 that is illustrated in FIG. 8 as a clamp, such as the cross-coupling clamp commercially available from Cannon. Cover 450 has a hinge 455 with jaws 460a and 460b that wrap around tube 325 and are held together by a fastener 465, which is illustrated as a pin, which holds cover 450 closed. Therefore, cover 450 is illustrated as a clamp that uses a fastener 465 to hold it closed.

[0033] The array of sensors disclosed in this document can switch between protected sensors as disclosed in FIGS. 5-8 and conventional unshielded sensors. Therefore, sensor array 100 of FIG. 1 may include a plurality of sensors as described in accordance with FIGS. 5-8 as well as conventional sensors without the cover and can be arranged to switch between one and the other. Additionally, shielded and unshielded sensors can be interleaved in any order to meet sensor array detection requirements.

[0034] In addition to the above, the array of sensors described in this document can be employed to measure properties of fluids or materials in the tubular column and a space to determine the flow rate of a production zone, within the annular space and/or tubular column. The annular space is formed between the outside of a tubular string and the surface of the borehole or casing. The method includes deploying the tubular string and coil sensor array into the wellbore. The sensor array can be run outside the production pipeline. When deploying the tubular column and coil sensor array, at least one pair of zonal isolation packers can be used to create a production zone. At least two of the plurality of sensors are located within the production zone.

[0035] A first of the at least two of the plurality of sensors may be located upstream of a flow regulator and a second of the at least two of the plurality of sensors may be located downstream of the flow regulator. The method may also include receiving the first pressure data at a processor from the first of the at least two of the plurality of sensors. Additionally, the method may include receiving second processor pressure data from the second of the at least two of the plurality of sensors. Furthermore, the method can include determining, in the processor, a differential pressure based on the difference between the first pressure data and the second pressure data. The method can calculate, in the processor, a production zone fluid flow rate based on differential pressure.

[0036] In further examples for determining flow rate, the method includes deploying a tubular string within a well, the tubular string having a central flow passage and an outer surface, at least one tubular of the tubular string having a flow port (also referred to as flow passage) formed therein. The method further includes deploying a coil sensor array comprising a plurality of sensors along with deploying the tubular column, wherein the coil sensor array is coupled to the tubular column during deployment. The method may also include deploying a plurality of zonal isolation packer pairs to isolate a corresponding number of production zones, wherein at least two sensors of the plurality of sensors are located within the production zones. The at least two sensors of the plurality of sensors comprise a first sensor located upstream of an initial flow regulator and a second sensor located downstream of the initial flow regulator. The method may further include implanting the second sensor to have fluid coupling to the initial flow regulator.

[0037] The method may also include deploying the first sensor on a screen. The method may also include deploying an additional flow regulator that is downstream of the initial flow regulator and has a third sensor implanted downstream of the additional flow regulator.

[0038] The method may further include receiving first pressure data at a processor from the first sensor in a respective plurality of production zones. The method may further include receiving second processor pressure data from the second sensor in a respective plurality of production zones. Additionally, the method may include receiving third processor pressure data from the third sensor in a respective plurality of production zones. Furthermore, the method can include determining, in the processor, a first differential pressure based on the difference between the first pressure data and the second pressure data. The method may also include determining, in the processor, a second differential pressure based on the difference between the second pressure data and the third pressure data. The method can calculate, in the processor, a corresponding production zone fluid flow rate based on the first differential pressure and the second differential pressure. In at least one example, the method can obtain first pressure data, second pressure data, and third pressure data substantially simultaneously. As used herein, substantially simultaneously can comprise within one second, one minute or within one hour. In at least one example, substantially simultaneously can be within one second or less.

[0039] A flow port can be machined or provided in the pipeline. In one example, the flow port can be a part of a flow regulator.

[0040] FIG. 9 is a schematic diagram illustrating an environment in which the present disclosure can be implemented to determine flow rate in a production zone. The environment, in this case a completion, is generally denoted as 3, including a tubular column 22 for use in completing and stimulating formation and an annular space 39. Reference numerals in FIG. 9 repeated from FIG. 1 refer to the same features.

[0041] Zone isolation packers 26 are divided by training target zones. The packers 26 isolate target zones for stimulation and production which may include fractures 35. The packers 26 may be expandable packers, however, they may be other types of packers as are known in the industry, for example slide-on, expandable or inflatable packers. Additional downhole tools or devices may also be included in the work string, such as valve assemblies, eg on the valve, safety valves, inflow control devices, check valves, etc. Pipe sections between packers 26 may include sand screens 50 to prevent formation particles from entering as hydrocarbons are drawn off.

[0042] As illustrated, the tubular column 22 includes at least one pair of zonal isolation packers 26 that are operable to be coupled to the tubular column 22. As shown, there are at least two sensors of the plurality of sensors 101 located between a corresponding pair the at least one pair of zonal isolation packers 26. A first sensor 503 is located upstream of an initial flow regulator and a second sensor 505 is located downstream of the initial flow regulator. The first sensor 503 and the second sensor 505 can be pressure sensors, whereby the differential in pressure information can be used to determine the flow rate in a production zone.

[0043] FIG. 10 is a schematic cross-sectional view of a tubular string 20 in accordance with the present disclosure illustrating an initial flow regulator 500 together with a screen 505 in a production zone isolated by packers 26. The flow regulator 500 may be a from an ICD, AICD, ICV, choke, mouthpiece, baffle, restrictor, tube, or valve. As illustrated, a first sensor 503 is located upstream of the initial flow regulator 500 and connected to or near the screen 505. The second sensor 505 is illustrated downstream of the initial flow regulator 500 and can sense fluid pressure after passing through it. of the initial flow regulator 500. For example, the second sensor 505 may be attached to a housing 506 or cover of the initial flow regulator 505. The flow arrow 510 illustrates the fluid entering the well 13 of the formation 20. The fluid passes then through the screen 505, through the initial flow regulator 500. The flow arrow 515 illustrates the fluid passing through the initial flow regulator 500 and into the tube string 22 through the flow port 517. A differential pressure can be determined with based on the difference between the pressure data from the first sensor 503 and the pressure data from the second sensor 505. The flow rate from the production zone and into the tubular 22 can be determined based on the differential pressure.

[0044] FIG. 11 is a schematic cross-sectional view of a tubular string 20 in accordance with the present disclosure, illustrating a further method for determining flow rate in a production zone. FIG. 11 differs from FIG. 10 where FIG. 11 illustrates two production zones formed by packers 26, as well as an additional flow regulator 520. The additional flow regulator 520 is located between the same pair of zonal isolation packers 26. In addition to the first sensor 503 and the second sensor 505, the plurality of sensors further includes a third sensor 507, which may be a pressure sensor, a temperature sensor, or any suitable sensor. The third sensor 507 is located downstream of the additional flow regulator 520. The additional flow regulator 520 is one of an ICD, AICD, ICV, choke, mouthpiece, baffle, restrictor, tube, or valve. The initial flow regulator 500 and the additional flow regulator 520 can have different flow resistances.

[0045] The secondary packers 25a and 25b can be placed between the pair of zonal isolation packers 27 to isolate an intermediate zone 38. The second flow sensor 505 can be arranged in an intermediate position in this intermediate zone 38 between two secondary packers 25a and 25b. Initial flow regulator 500 may be disposed below secondary packer 25a and additional flow regulator 520 may be disposed below secondary packer 25b. Therefore, the production fluid can flow as shown by the flow arrow 510 from the formation 20 through the screen 505 and then through the initial flow regulator 510 into the intermediate zone 38. The fluid then passes through the flow regulator additional 520 and through flow port 517 into tubular 22, as shown by flow arrow 515. Third sensor 507 may be disposed between zonal isolation packer 26 and secondary packer 25b which also has flow port 22 .

[0046] To determine the flow rate, a pressure information can be used. Therefore, although pressure is used in the illustrated embodiment, other fluid properties can be obtained, such as temperature. Pressure data may be obtained from the first sensor 503, from the second sensor 505 in one or more of the plurality of zones isolated by zonal isolation packers 26. Furthermore, pressure data may be obtained from the third sensor 507 in one or more of the respective plurality of production zones. A differential pressure based on the difference between the pressure data from the first sensor 503 and the pressure data from the second sensor 505 can be obtained and the flow rate determined in the respective production zones. Additionally, a second differential pressure based on a difference between the pressure data from the second sensor 505 and the pressure data from the third sensor 507. A corresponding production zone fluid flow rate can also be determined based on the first differential pressure and the second differential pressure. In at least one example, the method can obtain pressure from the first sensor 503, the second sensor 505, and the third sensor 507 substantially simultaneously. As used herein, substantially simultaneously can comprise within one second, one minute or within one hour. In at least one example, substantially simultaneously can be within one second or less.

[0047] FIG. 12 is a flowchart of flow 1200 illustrating the calculation of a flow rate using the array of sensors disclosed herein. As shown in step 1205, a tubular column is deployed with an array of sensors. A first sensor and a second sensor of the sensor array may be arranged in one or a plurality of production zones. At step 1210, a first sensor is disposed upstream of a flow regulator and a second sensor is disposed downstream of a flow regulator. Generally, the fluid produced from the formation flows through the flow regulator and into the tube string. In step 1215, first pressure data is received from a first sensor and second pressure data is received from a second sensor. In step 1220, a differential pressure is determined based on the difference between the first pressure data and the second pressure data. Then, in step 1225, a production zone fluid flow rate is calculated based on the differential pressure. This can be carried out in one production zone or in a plurality of production zones.

[0048] After step 1210, an alternative or additional flow is shown, starting with step 1230, in which a third sensor is arranged downstream of an additional flow regulator. At step 1235, first pressure data may be obtained from the first sensor, second pressure data may be obtained from the second sensor, and third pressure data may be obtained from the third sensor. In step 1240, a first differential pressure can be obtained based on the difference between the first pressure data and the second pressure data. In step 1245, a second differential pressure can be obtained between the second pressure data and the third pressure data. Then, at step 1250, a production zone flow rate can be calculated based on the first differential pressure and the second differential pressure. This can be carried out in one production zone or in a plurality of production zones.

[0049] In addition to the above, a sensor array, and particularly an expandable sensor array, can be used to measure the profile, such as a pressure profile, in another non-flowing well. This sensor suite is used to monitor stimulation treatments in nearby wells. The monitoring well, which is the well that has the array of sensors, has no production flow. As a result, all pressure variations can be attributed to the effects of stimulation treatments on nearby wells. Therefore, by detecting such variations, nearby wells can be monitored and evaluated.

[0050] FIG. 13 is a schematic of an environment for deployment of the present disclosure having an oilfield 1100. As illustrated, the environment includes a monitoring well 1135. Although a monitoring well 1135 is illustrated in FIG. 13, the present disclosure can be implemented in a well without production, flow or injection and can work equally well without packers, isolated zones, as well as in alternative phases of a well under completion. As shown, an array of sensors 100 is expandable from coil 1105. The array of sensors 100 is shown as having a thread 110 connecting each of the individual sensors 101. The thread 110 can be a cable, thread, metal, TEC and it can be conductive and allow energy and data to be transferred through the line 110 between each of the sensors 101 and to the surface. In at least one example, line 110 may include an optical fiber. Line 110 can be malleable enough to allow for coiling and some amount of bending, but also rigid enough to maintain a given shape in the absence of external force. Matrix data may be provided to an on-surface processor 1175, such as device 1200 discussed further below. Sensors 101 of sensor array 100 may be pressure and/or temperature sensors.

[0051] Sensor array 100 is deployed in well 1135, which extends into underground earth 1185, which may have various hydrocarbon formations and reservoirs. There may be no flow in monitoring well 1135. However, there may be flow at different times and little or no flow at other times. The series of sensors 100 allows monitoring of the temperature and/or pressure of adjacent (eg nearby) wells such as well 1155, which may be undergoing various phases, such as stimulation treatments. Stimulation treatments include fracture monitoring, injection treatments and other stimulation operations. As illustrated, well 1155 has a tube string 1150. In at least one example, tube string 1150 can be at least one of a production string, production piping, or casing. The tubular column 1150 can be made up of several individual tubulars, also referred to as sections or joints. In at least one example, the tubular column 1150 is a production column or pipeline as the present disclosure allows production monitoring. Well 1155 can have fractures 1190 as well as packers 1195 to isolate certain zones.

[0052] Observing measurements from the sensor array 100, and particularly pressure measurements when the sensor array 100 has pressure sensors, in well 1135 allows an operator to determine a state or property of an adjacent well such as well 1155, to determine if interference exists between wells, if unwanted zones are being stimulated, or how the stimulation treatment is progressing. Data from sensors 101 along line 110 may be fed to one or more surface processors, such as device 200 discussed further below. Device 200 is capable of measurement-based determination of a well status or property from an adjacent well, such as flow rate, or the status of a treatment, such as completion. These measurements are also useful for debugging what might go wrong during a stimulation or other treatment. Measurements can be processed at device 200 or displayed to an operator.

[0053] Well 1135 can have sensors placed in isolated zones, such as zone 1070, which can be isolated with packers 1070. When done with a number of zones, the operator or processor can determine the pressure increase in each zone, such as zone 1080 and then zone 1075. Alternatively, in other applications, two or more sensors 101 may be positioned in an isolated zone, such as zone 1075. Alternatively, well 1135 may be free of packers, isolated zones or other equipment and thus the set of sensors can be distributed freely.

[0054] The use of the set of sensors 101 allows the substantially simultaneous measurement of the pressure inside the well. Substantially simultaneous measurements can help avoid erroneous estimates, such as different stimulation events, being an inherently time-varying operation. Substantially simultaneous can be defined at precisely the same instant or alternatively within a short period of time, such as within 1 second, within 1 minute or within 1 hour. Pressure measurements can be calculated over time or can be low-pass filtered to help remove noise.

[0055] The present disclosure can also be implemented with respect to various injections, such as perimeter injection. In perimeter injection fluids (typically water/brine) are injected into the perimeter, such as the perimeter 1160 of the oil field 1100 with the intention of driving the oil (any type of hydrocarbon) to produce wells within the oil field 1100. The profile pressure provided by the pressure sensor array can alert an operator (or customer) if the injection wells are injecting at the correct flow rates or are injecting at the correct depths.

[0056] On a monitoring well completion, an array of sensors is used to provide estimates of what is happening in a nearby well. This training cross-assessment provides a useful understanding of pacing behavior.

[0057] FIG. 14 is a block diagram of an example device 200. Device 200 is configured to perform data processing and communicate with sensors 101 of sensor array 100 in FIGS. 1, 4, 9 and 13. In operation, the device 200 communicates with one or more of the above-discussed wellbore components and may also be configured to communicate with remote devices/systems.

[0058] As shown, the device 200 includes hardware and software components such as network interfaces 210, at least one processor 220, sensors 260 and a memory 240 interconnected by a system bus 250. The network interfaces 210 include mechanical circuitry , electrical, and signaling for data communication over communication links, which may include wired or wireless communication links. Network interfaces 210 are configured to transmit and/or receive data using a variety of different communication protocols, as will be understood by those skilled in the art.

[0059] Processor 220 represents a digital signal processor (eg, a microprocessor, a microcontroller, or a fixed logic processor, etc.) configured to execute instructions or logic to perform tasks in a well environment. Processor 220 may include a general purpose processor, special purpose processor (where software instructions are embedded in the processor), a state machine, application specific integrated circuits (ASIC), a programmable gate array (PGA) including a PGA field, an individual component, a distributed group of processors, and the like. Processor 220 typically operates in conjunction with shared or dedicated hardware, including, but not limited to, hardware capable of running software and hardware. For example, processor 220 may include elements or logic adapted to run software programs and manipulate data structures 245, which may reside in memory 240.

[0060] The sensors 260 which may include the sensors 101 of the sensor array 100 as disclosed herein typically operate in conjunction with the processor 220 to perform well drilling measurements and may include special purpose processors, detectors, transmitters, receivers and the like. Accordingly, sensors 260 may include hardware/software to generate, transmit, receive, detect, record and/or sample magnetic fields, seismic activity and/or acoustic waves or other wellbore parameters.

[0061] Memory 240 comprises a plurality of storage locations that are addressable by processor 220 for storing software programs and data structures 245 associated with the embodiments described herein. An operating system 242, portions of which may typically be resident in memory 240 and executed by processor 220, functionally organize the device by, inter alia, invoking operations supporting processes and/or software services 244 running on device 200. These processes and/or software services 244 may perform data processing and communication with device 200, as described herein. It is noted that while process/service 244 is displayed in centralized memory 240, some embodiments provide for these processes/services to be operated in a distributed computing network.

[0062] It will be apparent to those skilled in the art that other types of processors and memory, including various computer-readable media, may be used to store and execute program instructions pertaining to the well evaluation techniques described herein. Furthermore, while the description illustrates various processes, it is expressly contemplated that various processes may be incorporated as modules having portions of process/service 244 encoded in them. In this way, program modules may be encoded onto one or more tangible, computer-readable storage media for execution, such as fixed logic or programmable logic (e.g., software/computer instructions executed by a processor, and any processor can be a programmable processor, programmable digital logic such as field programmable gate arrays or an ASIC comprising fixed digital logic. In general, any process logic may be incorporated into processor 220 or computer readable medium encoded with instructions for execution by the processor 220 that, when executed by the processor, are operable to cause the processor to perform the functions described in this document.

[0063] The arrangements shown and described above are examples only. Therefore, many such details are neither shown nor described. Although numerous features and advantages of the present technology have been set forth in the foregoing description, along with details of the structure and function of the present disclosure, the disclosure is illustrative only and changes may be made in details, especially in matters of shape, size and arrangement of the parts within the principles of the present disclosure to the extent indicated by the broad general meaning of terms used in the appended claims. It will therefore be appreciated that the above-described embodiments can be modified within the scope of the present disclosure.

[0064] Statements of the disclosure include: Statement 1: A method comprising: implanting a tubular string within a well, the tubular string having a central flow passage and an outer surface; deploying a coil sensor array, wherein the coil sensor array comprises a plurality of sensors and is coupled to the tube string, measuring a property of a fluid within the tube string with at least one sensor of the sensor array in coil.

[0065] Statement 2: The method according to statement 1, in which the at least one sensor of the coil sensor array is connected via a conductive line with one or more other sensors of the coil sensor array.

[0066] Statement 3: The method according to Statement 1 or 2, in which the tubular column along its length has a flow hole extending from the central flow passage to the outer surface, further comprising the positioning of at least one sensor close to the flow port sufficient to detect a property of the internal fluid within the central flow passage.

[0067] Statement 4: The method according to any of the preceding statements 1-3, where the property is one or more of temperature, pressure, or flow rate.

[0068] Statement 5: The method according to any one of the preceding statements 1-4, wherein the tubular column along its length has a flow port extending from the central flow passage to the outer surface, and the method further comprising: delivering a pair of isolation packers, the pair of isolation packers comprising a first isolation packer and a second isolation packer; and deploying a secondary packer between the pair of isolation packers, wherein at least one of the plurality of sensors is located between the first insulation packer and the secondary packer and at least another one of the plurality of sensors located between the second insulation packer and the secondary packer.

[0069] Statement 6: The method according to statement 4, employing at least one secondary packer comprising the location of the secondary packer on a flow regulator.

[0070] Statement 7: The method according to statement 5 or 6, employing at least one secondary packer comprising the location of the secondary packer on a flow regulator.

[0071] Statement 8: The method according to statement 1, wherein at least one tubular of the tubular column with a proprietary communicating port extends from a central flow passage to the outer surface; and the method further comprising: covering the property port with a cover and maintaining, through the cover, at least one of the sensors of the array of sensors in a position close to the property port sufficient to detect a property of a fluid inside the central flow passage.

[0072] Statement 9: The method according to statement 8, wherein the cladding surrounds both the sensor and the proprietary communication port.

[0073] Statement 10: The method according to statement 8 or 9, wherein the property communicating port is an opening in the tubular.

[0074] Statement 11: The method according to any of the preceding statements 8-10, wherein the covering is elastomeric.

[0075] Statement 12: The method according to any of the preceding statements 8-11, wherein the cover is coupled to the tubular with a gasket, thereby sealing off the property communicating port.

[0076] Statement 13: A method comprising: implanting a tubular string within a well, the tubular string having a central flow passage and an outer surface; deploying a coil sensor array comprising a plurality of sensors; coupling the coil sensor array including a plurality of sensors to the pipe string; deploying a pair of zonal isolation packers to isolate a production zone; wherein at least at least two sensors of the plurality of sensors of the sensor-on-coil array are located within the production zone, a first of the at least two sensors being located upstream of an initial flow regulator and a second of the at least two sensors being located downstream of the initial flow regulator.

[0077] Statement 14: The method according to statement 13, further comprising: receiving the first pressure data on a processor from the first of the at least two sensors; receiving second pressure data on the processor from the second of the at least two sensors; determining, in the processor, a differential pressure based on the difference between the first pressure data and the second pressure data; calculation, in the processor, of a fluid flow rate within the production zone based on differential pressure.

[0078] Statement 15: The method according to either statement 13 or 14, further comprising deploying the first of at least two sensors on or in close proximity to a screen.

[0079] Statement 16: The method according to any one of the preceding statements 13-15, further comprising applying the second of the at least two sensors to have a fluid coupling to the initial flow regulator that measures a property of the outgoing fluid of the initial flow regulator.

[0080] Statement 17: The method according to any of the preceding statements 13-16, wherein a pair of secondary packers isolates a zone having the second of at least two sensors between the initial flow regulator and an additional flow regulator .

[0081] Statement 18: The method according to any one of the preceding statements 13-17, wherein a third sensor of the plurality of sensors is located downstream of an additional flow regulator, the additional flow regulator being downstream of the regulator initial flow.

[0082] Statement 19: The method according to any of the preceding statements 13-18, further comprising: receiving the first pressure data on a processor from the first of the at least two sensors; receiving second processor pressure data from the second of the at least two sensors; receiving third processor pressure data from the third sensor; determining, at the processor, a first differential pressure based on the difference between the first pressure data and the second pressure data; determining, in the processor, a second differential pressure based on the difference between the second pressure data and the third pressure data; and calculating, in the processor, a production zone fluid flow rate corresponding value based on the first differential pressure and the second differential pressure.

[0083] Statement 20: The method according to any one of the preceding statements 13-19, deploying a plurality of pairs of zonal isolation packers to isolate a corresponding number of production zones, in which at least two of the plurality of sensors are located within the production zones; wherein at least two of the plurality of sensors comprise a first sensor to be located upstream of an initial flow regulator and a second sensor to be located downstream of the initial flow regulator wherein at least two of the plurality of sensors.

[0084] Statement 21: A method of monitoring close wells comprising: deploying a sensor array in a non-producing well, the sensor array comprising a plurality of sensors connected along the length of a lead line; substantially simultaneously obtaining a measurement by each of the sensors in the array of a downhole property; and determining, based on the measurement, a well status or property of an adjacent well.

[0085] Statement 22: The method according to statement 21, wherein the downhole property is one or more of the wellbore temperature or pressure.

[0086] Statement 23: The method according to statement 21 or 22, where "substantially simultaneously" is defined as obtaining a measurement by each of the sensors in the sensor array within a time period of one minute.

[0087] Statement 24: The method according to any one of the preceding statements 21-23, wherein the adjacent well is under a stimulation treatment.

[0088] Statement 25: The method according to any one of the preceding statements 21-24, wherein the wellbore property of the adjacent wellbore is a flow rate of a fluid in the adjacent wellbore.

[0089] Statement 26: A system comprising: a tubular string positioned within a well, the tubular string having a central flow passage and an outer surface; and a coil sensor array provided along the tubular string, wherein the coil sensor array comprises a plurality of sensors and is coupled to the tubular string, the coil sensor array being operable to measure a property of a fluid inside the tubular column with at least one sensor from the coil sensor array.

[0090] Statement 27: The method according to statement 26, in which the at least one sensor of the coil sensor array is connected via a conductive line with one or more other sensors of the coil sensor array.

[0091] Statement 28: The method according to statement 26 or 27, wherein the tubular column along its length has a flow port extending from the central flow passage to the outer surface, the at least one sensor close enough to the flow port to detect a property of the internal fluid within the central flow passage.

[0092] Statement 29: The method according to any of the preceding statements 26-28, wherein the property is one or more of temperature, pressure, or flow rate.

[0093] Statement 30: The method according to any one of the preceding statements 26-29, wherein the tubular string along its length has a flow port extending from the central flow passage to the outer surface, a pair of insulation packers, the pair of insulation packers comprising a first insulation packer and a second insulation packer; the secondary packer located between the pair of insulation packers, wherein at least one sensor of the plurality of sensors is located between the first insulation packer and the secondary packer and at least one sensor of the plurality of sensors is located between the second insulation packer and the secondary packer; and a processor communicatively coupled to the coil sensor array and being operable to obtain data from of the plurality of sensors.

[0094] Statement 31: The method according to statement 30, in which the secondary packer is positioned on a flow regulator.

[0095] Statement 32: The method according to statement 30 or 31, comprising at least one tubular of the tubular column with a proprietary communicating port extending from a central flow passage to the outer surface; a shroud covering the proprietary port and maintaining, by means of the shroud, at least one of the sensors of the sensor array in a position close to the proprietary port sufficient to detect a property of an internal fluid within the passageway center flow.

[0096] Statement 33: The method according to any of the preceding statements 30-32, wherein coverage involves both the sensor and the proprietary communication port.

[0097] Statement 34: A system comprising a tubular having a central flow passage for an internal fluid and an external surface; at least one pair of zonal isolation packers operable to be coupled to the tubular and operable to create a production zone; a coil sensor array coupled to the tubular and having a plurality of sensors; at least one flow regulator, each of the at least one flow regulator corresponding to each pair of the at least one pair of zonal isolation packers, the at least one flow regulator coupled to the tubular and operable to allow fluid to flow from the outer surface of the tubular for the central flow passage; and at least two of the plurality of sensors being located between a corresponding pair of the at least one pair of zonal isolation packers on at least two sensors of the plurality of sensors comprising: a first sensor located upstream of an initial flow regulator of the at least one flow regulator; a second sensor located downstream of the initial flow regulator; a processor coupled to the corresponding first sensor and second sensor, the processor being operable to determine a pressure differential between the corresponding first and second sensors.

[0098] Statement 35: The method according to statement 34, wherein the processor is operable to calculate a fluid flow rate from the corresponding production zone based on the pressure differential.

[0099] Statement 36: The method according to statement 34 or 35, further comprising an additional flow regulator and the plurality of sensors further comprising a third sensor, wherein the third sensor is located downstream of the additional flow regulator and wherein the processor is coupled to a third sensor and is operable to: determine an additional differential pressure between the corresponding second and third sensors; and calculating a fluid flow rate from the corresponding production zone based on the differential pressure and the additional differential pressure.

[00100] Statement 37: The method according to statement 36, in which a pair of secondary packers isolates a zone having the second sensor between the initial flow regulator and the additional flow regulator.

[00101] Statement 38: The method according to any of the previous statements 34-37, in which the first sensor is arranged on or near a screen.

[00102] Statement 39: The method according to any one of the preceding statements 34-38, further comprising the second sensor having a fluid coupling to the initial flow regulator for measuring a property of the fluid leaving the initial flow regulator.

[00103] Statement 40: A close well monitoring system comprising: an array of sensors arranged in a non-producing well, the set of sensors comprising a plurality of sensors connected along the length of a conducting line, the set of operable sensors to obtain, substantially simultaneously, a measurement by each of the sensors in the array of a downhole property of the well; and a processor coupled with the array of sensors and operable to determine, based on the measurement, a well state or property of an adjacent well.

[00104] Statement 41: The method according to statement 40, where the downhole property is one or more of the wellbore temperature or pressure.

[00105] Statement 42: The method according to statement 40 or 41, where "substantially simultaneously" is defined as taking a measurement by each of the sensors in the sensor array within a time period of one minute.

[00106] Statement 43: A tubular column comprising a tubular having a central flow passage and an outer surface; a coil sensor array coupled to the tubular, wherein the coil sensor array comprises a plurality of sensors and is coupled to the tubular column during deployment, the coil sensor array being operable to measure a property of a fluid within the tubular tubular column with at least one sensor from the coil sensor array.

[00107] Statement 44: The method according to statement 43, in which the at least one sensor of the coil sensor array is connected through a conductive line with one or more other sensors of the coil sensor array.

[00108] Statement 45: The method according to statement 43 or 44, wherein the tubular column along its length has a flow port extending from the central flow passage to the outer surface, the at least one sensor close enough to the flow port to detect a property of the internal fluid within the central flow passage.

[00109] Statement 46: The method according to any of the preceding statements 43-45, where the property is one or more of temperature, pressure or flow rate.

[00110] Statement 47: The method according to any of the preceding statements 43-46, wherein the tubular column along its length has a flow port extending from the central flow passage to the outer surface, a pair of insulation packers, the pair of insulation packers comprising a first insulation packer and a second insulation packer; and a secondary packer located between the pair of insulation packers, wherein at least one sensor of the plurality of sensors is located between the first insulation packer and the secondary packer and at least one other sensor of the plurality of sensors located between the second packer insulation and the secondary packer.

[00111] Statement 48: The method according to statement 47, in which the secondary packer is positioned on a flow regulator.

[00112] Statement 49: The method according to statement 47 or 48, wherein at least one tubular of the tubular column has a proprietary communicating port extending from a central flow passage to the outer surface; a cover coupled to the tubular, the cover covering the proprietary communication port and keeping the sensor close enough to the communication port to detect a property of the internal fluid within the central flow passage.

[00113] Statement 50: The method according to any of the preceding statements 47 to 49, wherein coverage involves both the sensor and the proprietary communication port.

[00114] Statement 51: The method according to any one of the preceding statements 47 to 50, wherein in which the property communicating port is an opening in the tubular.

[00115] Statement 52: The method according to any of the preceding statements 47 to 51, wherein the covering is elastomeric.

[00116] Statement 53: The method according to any of the preceding statements 47 to 52, in which the cover is coupled to the tubular with a seal, thus sealing the property communication port.

[00117] Statement 54: A tubular column comprising: a tubular having a central flow passage for an internal fluid and an external surface; at least one pair of operable zonal isolation packers to be coupled to the tubular; a coil sensor array coupled to the tubular and having a plurality of sensors; at least one flow regulator, for each pair of the at least one pair of zonal isolation packers, coupled to the tubular and operable to allow fluid to flow from the outer surface of the tubular to the central flow passage; and at least two flow sensors the plurality of sensors being located between a corresponding pair of the at least one pair of zonal isolation packers, the at least two sensors of the plurality of sensors comprising a first sensor located upstream of an initial flow regulator of the at least one flow regulator; and a second sensor located upstream of the initial flow regulator.

[00118] Statement 55: The method according to Statement 54, where the first sensor is implanted in or near a screen.

[00119] Statement 56: The method according to statement 54 or 55, where a third sensor is located downstream of an additional flow regulator, the additional flow regulator being downstream of the initial flow regulator.

[00120] Statement 57: The method according to any of the preceding statements 54-56, wherein the initial flow regulator is an input control device (ICD) and the additional flow regulator is an input control device autonomous (AICD).

[00121] Statement 58: The method according to any of the preceding statements 54-57, wherein a pair of secondary packers isolates a zone having the second sensor between the initial flow regulator and the additional flow regulator.

[00122] Statement 59: The method according to any one of the preceding statements 54-58, comprising a plurality of pairs of zonal isolation packers coupled to the tubular to isolate a corresponding number of production zones, wherein at least two sensors of the plurality of sensors are located within the production zones; wherein the at least two sensors of the plurality of sensors comprise a first sensor located upstream of an initial flow regulator and a second sensor located downstream of the initial flow regulator.

[00123] Statement 60: The method according to any of the preceding statements 54-59, wherein the initial flow regulator is one of an input control device (ICD), autonomous input control device (AICD), inlet control valve (ICV), choke, nozzle, baffle, restrictor, tube or valve.

[00124] Statement 61: A method configured to calculate the flow rate in a tubular column, the method comprising: implanting a tubular column within a well, the tubular column having a central flow passage and an outer surface; deploying a coil sensor array comprising a plurality of sensors along deploying the tubular column; coupling the coiled sensor array to the tubular string during deployment; deploying at least one pair of zonal isolation packers for isolating a production zone; wherein at least two of the plurality of sensors are located within the production zone, a first of the at least two sensors of the plurality of sensors being located upstream of a flow regulator and a second of the at least two sensors of the plurality of sensors being located downstream of the flow regulator.

[00125] Statement 62: The method according to statement 61, wherein at least one sensor of the plurality of sensors is a pressure sensor.

[00126] Statement 63: The method according to either statement 61 or 62, wherein at least one of the sensors of the plurality of sensors is a combination of a temperature and pressure sensor.

[00127] Statement 64: The method according to any of the preceding statements 61-63, in which the flow regulator is one of an inlet control device (ICD), autonomous inlet control device (AICD), valve control valve (ICV), choke, nozzle, baffle, restrictor, tube or valve.

[00128] Statement 65: The method according to any one of the preceding statements 61-63, further comprising: receiving the first pressure data on a processor from the first of the at least two sensors of the plurality of sensors; receiving the second pressure data at the processor from the second of the at least two sensors of the plurality of sensors; determining, in the processor, a differential pressure based on the difference between the first pressure data and the second pressure data; calculation, in the processor, of a production zone fluid flow rate based on differential pressure.

[00129] Statement 66: A method for determining a fluid flow rate throughout a plurality of production zones, the method comprising: implanting a tubular column within a well, the tubular column having a central flow passage and an outer, at least one tubular surface of the tubular string having a flow passage formed therein; deploying a coiled sensor array comprising a plurality of sensors along with deploying the tubular column, coupling the coiled sensor array to the tubular column during deployment; deploying a plurality of pairs of zonal isolation packers to isolate a corresponding number of production zones, wherein at least two sensors of the plurality of sensors are located within the production zones; wherein the at least two sensors of the plurality of sensors comprise a first sensor located downstream of an initial flow regulator and a second sensor located upstream of the initial flow regulator.

[00130] Statement 67: The method according to statement 66, further comprising deploying the second sensor to have a fluid coupling to the initial flow regulator.

[00131] Statement 68: The method according to statement 66 or 67, further comprising deploying the first sensor on or in close proximity to a screen.

[00132] Statement 69: The method according to any one of the preceding statements 66-68, wherein at least two sensors of the plurality of sensors comprise a third sensor.

[00133] Statement 70: The method according to any of the preceding statements 66-69, wherein the third sensor is located downstream of an additional flow regulator, which is downstream of the initial flow regulator.

[00134] Statement 71: The method according to any one of the preceding statements 66-70, wherein each of the plurality of production zones includes three sensors.

[00135] Statement 72: The method according to any one of the preceding statements 66-71, further comprising: receiving the first pressure data in a processor from the first sensor in a respective zone of the plurality of production zones; receiving second pressure data on the second sensor processor in a respective zone of the plurality of production zones; receiving third pressure data at the processor from the third sensor in a respective zone of the plurality of production zones; determining, at the processor, a first differential pressure based on the difference between the first pressure data and the second pressure data; determining in the processor a second differential pressure based on a difference between the second pressure data and the third pressure data; and calculating in the processor a fluid flow rate from a corresponding production zone based on the first differential pressure and the second differential pressure.

[00136] Statement 73: The method according to any of the preceding statements 66-72, wherein the first pressure data, second pressure data and third pressure data are obtained substantially simultaneously.

[00137] Statement 74: The method according to any one of the preceding statements 66-72, wherein the respective first pressure data, second pressure data and third pressure data for each respective zone are obtained substantially simultaneously by the entire plurality of production zones.

[00138] Statement 75: A tubular column comprising: a tubular having a central flow passage for an internal fluid and an external surface; at least one pair of operable zonal isolation packers to be coupled to the tubular; a coil sensor array coupled to the tubular and having a plurality of sensors; at least one flow regulator, for each pair of the at least one pair of zonal isolation packers, coupled to the tubular and operable to allow fluid to flow from the outer surface of the tubular to the central flow passage; and at least two sensors of the plurality of sensors being located between a corresponding pair of the at least one pair of zonal isolation packers, the at least two sensors of the plurality of sensors comprising a first sensor located upstream of an initial flow regulator of the at least one least one flow regulator; and a second sensor located upstream of the initial flow regulator.

[00139] Statement 76: The tubular column according to statement 75, wherein the at least one flow regulator further comprises an additional flow regulator and at least two sensors of the plurality of sensors further comprises a third sensor.

[00140] Statement 77: The tubular column according to statement 76, where the third sensor is located downstream of the additional flow regulator.

[00141] Statement 78: The tubular column according to any one of the preceding statements 75-77, wherein the at least one pair of zonal isolation packers comprises a plurality of pairs of zonal isolation packers and each pair of the plurality of packers of zonal isolation being operable to establish a production zone within a well.

[00142] Statement 79: The tubular column according to any of the preceding statements 75-78, in which the initial flow regulator is one of an inlet control device (ICD), autonomous inlet control device (AICD) , inflow control valve (ICV), choke, spout, baffle, restrictor, tube or valve.

[00143] Statement 80: The tubular column according to any of the previous statements 76-79, in which the additional flow regulator is one of an entry control device (ICD), autonomous entry control device (AICD) , inflow control valve (ICV), choke, spout, baffle, restrictor, tube or valve.

[00144] Statement 81: The tubular string according to any of the preceding statements 76-80, wherein the initial flow regulator is an inlet control device (ICD) and the additional flow regulator is a flow control device standalone input (AICD).

[00145] Statement 82: The tubular column according to any one of the preceding statements 75-81, wherein at least one sensor of the plurality of sensors is a pressure sensor.

[00146] Statement 83: The tubular column according to any one of the preceding statements 75-82, wherein at least one sensor of the plurality of sensors is a combined pressure and temperature sensor.

[00147] Statement 84: A system comprising a tubular with a central flow passage for an internal fluid and an external surface; at least one pair of operable zonal isolation packers to be coupled to the tubular and operable to create a production zone; a coil sensor array coupled to the tubular and having a plurality of sensors; at least one flow regulator for each pair of the at least one pair of zonal isolation packers coupled to the tubular and operable to allow fluid to flow from the outer surface of the tubular to the central flow passage; and at least two of the plurality of sensors being located between a corresponding pair of the at least one pair of zonal isolation packers in the at least two sensors of the plurality of sensors comprising: a first sensor located upstream of an initial flow regulator of the at least a flow regulator; a second sensor located downstream of the initial flow regulator; a processor coupled to the corresponding first sensor and second sensor, the processor being operable to determine a pressure difference between the corresponding first and second sensors.

[00148] Statement 85: The system according to statement 84, wherein the processor is operable to calculate a fluid flow rate from the corresponding production zone based on the pressure difference.

[00149] Statement 86: The system according to statement 85 or 85, wherein the at least one flow regulator further comprises an additional flow regulator and at least two sensors of the plurality of sensors further comprises a third sensor.

[00150] Statement 87: The system according to statement 86, where the third sensor is located downstream of the additional flow regulator.

[00151] Statement 88: The system according to any one of the preceding statements 84-87, wherein the at least one pair of zonal isolation packers comprises a plurality of pairs of zonal isolation packers and each pair of the plurality of zonal isolation packers zonal isolation being operable to establish a production zone within a well.

[00152] Statement 89: The system according to any one of the preceding statements 86-88, wherein the processor is coupled to the third sensor and is operable to: determine an additional differential pressure between the corresponding second and third sensors; and calculating a fluid flow rate from the corresponding production zone based on the differential pressure and the additional differential pressure.

[00153] Statement 90: The system according to any of the preceding statements 84-87, in which the flow regulator is one of an inlet control device (ICD), autonomous inlet control device (AICD), valve control valve (ICV), choke, nozzle, baffle, restrictor, tube or valve.

[00154] Statement 91: The system according to any of the preceding statements 86-90, in which the additional flow regulator is one of an input control device (ICD), autonomous input control device (AICD), inlet control valve (ICV), choke, nozzle, baffle, restrictor, tube or valve.

[00155] Statement 92: The system according to any of the preceding statements 86-91, wherein the flow regulator is an input control device (ICD) and the additional flow regulator is a stand-alone input control device (AICD).

[00156] Statement 93: The system according to any one of the preceding statements 86-92, wherein at least one sensor of the plurality of sensors is a pressure sensor.

[00157] Statement 94: The system according to any one of the preceding statements 86-93, wherein at least one sensor of the plurality of sensors is a combined pressure and temperature sensor.

[00158] Statement 95: A method for obtaining a measurement of property fluids in a tubular column and an annular space, the method comprising: implanting a tubular column within a well, the tubular column having a central flow passage and an outer surface, at least one tubular of the tubular column having a flow passage formed therein; deploying a coil sensor array together with the tubular column deployment, wherein the coil sensor array comprises a plurality of sensors and is coupled to the tubular column during deployment; deployment of at least one pair of zonal isolation packers to isolate a production zone; and deploying at least one secondary packer between the at least one pair of zonal isolation packers, wherein at least one sensor of the plurality of sensors is located on either side of the at least one secondary packer.

[00159] Statement 96: The method according to statement 95, wherein at least one of the sensors of the plurality of sensors comprises a combined temperature and pressure sensor.

[00160] Statement 97: The method according to statement 95 or 96, in which the secondary packer separates a production zone of the tubular column from the flow passage formed in the at least one tubular.

[00161] Statement 98: The system according to any of the preceding statements 95-97, wherein the application of at least one secondary packer comprises the location of the secondary packer on the flow regulator.

[00162] Statement 99: The method according to any of the preceding statements 95-98, wherein the flow regulator is one of an inlet control device (ICD), autonomous inlet control device (AICD), valve control valve (ICV), choke, nozzle, baffle, restrictor, tube or valve.

[00163] Statement 100: A tubular column comprising: a tubular having an outer surface and a central flow passage for an internal fluid; a pair of insulation packers, the pair of insulation packers comprising a first insulation packer and a second insulation packer; a coiled sensor array coupled to the tubular and having a plurality of sensors; and a secondary packer located between the pair of insulation packers, wherein at least one sensor of the plurality of sensors is located between the first insulation packer and the second insulation packer and at least one other sensor of the plurality of sensors is located between the second isolation packer and the secondary packer.

[00164] Declaration 101: The tubular column according to declaration 100, in which the tubular forms a passage through the external surface between the first insulation packer and the secondary packer, by which a sensor zone is formed.

[00165] Statement 102: The tubular column according to statement 100 or 101, wherein at least one sensor of the plurality of sensors is located within the sensor zone and is operable to detect properties of the internal fluid within the central flow passage .

[00166] Statement 103: The tubular column according to any of the preceding statements 100-102, wherein the plurality of sensors is located in an annular space between the outer surface and a coating.

[00167] Statement 104: The tubular column according to any one of the preceding statements 100-103, wherein a plurality of the plurality of sensors is located substantially close to the passage.

[00168] Statement 105: The tubular column according to any one of the preceding statements 100-104, wherein a plurality of the plurality of sensors is located over the passage.

[00169] Statement 106: The tubular column according to any one of the preceding statements 100-105, wherein at least one sensor of the plurality of sensors is located within the sensor zone and is operable to detect properties of the internal fluid in the central flow passageway and wherein at least one other of the plurality of sensors is located in a production zone and is operable to detect fluid properties external to the outer surface of the tubular.

[00170] Statement 107: The tubular string according to any of the preceding statements 100-106, wherein the tubular includes a flow regulator and the secondary packer placed over the flow regulator.

[00171] Statement 108: The tubular column according to any one of the preceding statements 100-107, wherein at least one sensor of the plurality of sensors is located within a sensor zone and measures fluid flow properties through the flow regulator flow into the passageway, thereby providing a measurement of the properties of the internal fluid within the central flow passageway, and wherein at least one other of the plurality of sensors is located in a production zone and is operable to measure properties of the fluid within the passageway. an annular space between the outer surface of the tubular and a liner.

[00172] Statement 109: A system comprising: an operable tubular column to be deployed in a well, the tubular column having an outer surface and a central flow passage for the passage of an internal fluid; a pair of zonal isolation packers to be coupled to the tubular column; a coiled sensor array coupled to the tubular string and having a plurality of sensors; at least one secondary packer located between the pair of zonal isolation packers, wherein one sensor of the plurality of sensors is located between one of the pairs of isolation packers and the secondary packer and another sensor of the plurality of sensors located between another pair of the pair of zonal isolation packers and the secondary packer; and a device coupled to the coil sensor array and operable to obtain data from the plurality of sensors.

[00173] Statement 110: The system according to statement 109, in which the tubular column forms a passage through the outer surface between the first insulation packer and the secondary packer, whereby a sensor zone is formed.

[00174] Statement 111: The system according to statement 109 or 110, wherein at least one sensor of the plurality of sensors is located within the sensor zone and is operable to detect properties of the internal fluid within the central flow passage.

[00175] Statement 112: The system according to any one of the preceding statements 109-111, wherein the plurality of sensors is a combined pressure and temperature sensor.

[00176] Statement 113: The system according to any of the preceding statements 109-112, wherein the at least one secondary packer is located on a flow regulator.

[00177] Declaration 114:20. The system according to any of the preceding statements 109-113, wherein the flow regulator is one of an inlet control device (ICD), autonomous inlet control device (AICD), inlet control valve (ICV ), choke, nozzle, deflector, restrictor, tube or valve.

[00178] Statement 115: A tubular column comprising: a tubular having a central flow passage for an internal fluid and an external surface; a proprietary communicating port along a length of the tubular extending from the central flow passage to the outer surface; a sensor; and a cover coupled to the tubular, the cover covering the proprietary communication port and keeping the sensor close enough to the proprietary communication port to detect a property of the internal fluid within the central flow passage.

[00179] Statement 116: The tubular column according to statement 115, where the cover surrounds both the sensor and the proprietary communication port.

[00180] Statement 117: The tubular column according to instruction 115 or 116, in which the property communicating port is an opening in the tubular.

[00181] Statement 118: The tubular column according to any of the previous statements 115-117, in which the cover is coupled to the tubular with a seal, thus sealing the property communication port.

[00182] Statement 119: The tubular column according to any of the preceding statements 115-118, wherein the cover covers a portion of the sensor.

[00183] Statement 120: The tubular column according to any of the preceding statements 115-119, wherein the covering is elastomeric.

[00184] Statement 121: The tubular column according to any of the preceding statements 115-120, in which the cover is a rigid or semi-rigid coating.

[00185] Statement 122: The tubular column according to any of the preceding statements 115-121, wherein the cover comprises a fastening portion for coupling to the tubular.

[00186] Statement 123: The tubular column according to any of the preceding statements 115-122, where the sensor is a sensor from an array of connected sensors of a conducting line.

[00187] Statement 124: The tubular column according to any of the previous statements 115-123, in which a second sensor of the sensor array is outside the coverage.

[00188] Statement 125: The tubular string according to any of the preceding statements 115-124, wherein the line extends to a surface processing unit.

[00189] Statement 126: The tubular string according to any of the preceding statements 115-125, where the sensor is a combined pressure and temperature sensor.

[00190] Statement 127: A method comprising: implantation of a tubular column within a well, the tubular column having a central flow passage and an outer surface, at least one tubular of the tubular column having a proprietary communication port that connects extending from a central flow passage to the outer surface; deploying a sensor array along with the tubular column; covering the proprietary communication port with a covering and maintaining, by means of the covering, at least one of the sensors of the array of sensors in a position close enough to the proprietary communication port to detect a property of an internal fluid within the central flow passage.

[00191] Statement 128: The method according to statement 127 where the property gateway is an opening.

[00192] Statement 129: The method according to statement 127 or 128, where the proprietary communication port is pre-machined.

[00193] Statement 130: The method according to any of the preceding statements 127-129, wherein coverage involves both the sensor and the proprietary communication port.

[00194] Statement 131: The method according to any of the preceding statements 127-130, wherein the cover is coupled to the tubular with a gasket, thereby sealing off the property communicating port.

[00195] Statement 132: The method according to any of the preceding statements 127-131, wherein the covering covers a portion of the sensor.

[00196] Statement 133: The method according to any of the preceding statements 127-132, wherein the covering is elastomeric.

[00197] Statement 134: The method according to any of the preceding statements 127-133, wherein the covering is a rigid or semi-rigid casing.

[00198] Statement 135: The method according to any of the preceding statements 127-134, wherein the cover comprises a fastening portion for coupling to the tubular.

[00199] Statement 136: The method according to any of the preceding statements 127-135, wherein a second sensor of the sensor array is out of coverage.

[00200] Statement 137: A system comprising: a tubular column implanted in a well, the tubular column having a central flow passage for the passage of an internal fluid and an external surface; at least one of the tubulars of the tubular column having a port proprietary communication along the length of the tubular extending from the central flow passage to the outer surface; an array of sensors connected via a line deployed in the wellbore; and a shroud coupled to the tubular, the shroud covering the proprietary communication port and keeping the sensor close enough to the proprietary communication port to detect a property of an internal fluid within the central flow passage.

[00201] Statement 138: The system according to statement 137, wherein the casing surrounds both the sensor and the proprietary communication port.

[00202] Statement 139: The system according to statement 137 or 138, wherein the property communicating port is an opening in the tubular.

[00203] Statement 140: The system according to any of the previous statements 137-139, in which the cover is coupled to the tubular with a seal, thus sealing the property communication port.

[00204] Statement 141: The system according to any of the preceding statements 137-140, wherein the coverage covers a portion of the sensor.

[00205] Statement 142: The method according to any of the preceding statements 137-141, wherein the covering is elastomeric.

[00206] Statement 143: The system according to any of the preceding statements 137-142, wherein the cover is a rigid or semi-rigid enclosure.

[00207] Statement 144: The system according to any of the preceding statements 137-143, wherein the cover comprises a fastening portion for coupling to the tubular.

[00208] Statement 145: The system according to any of the preceding statements 137-144, wherein the sensor is a sensor from the array of sensors along the length of a line.

[00209] Statement 146: The system according to any of the preceding statements 137-145, in which the line extends to a surface processing unit.

[00210] Statement 147: The system according to any one of the preceding statements 137-146, wherein a second sensor of the sensor array is out of coverage.

[00211] Statement 148: The system according to any of the preceding statements 137-147, wherein the sensor is a combined pressure and temperature sensor.

[00212] Statement 149: A method of monitoring wells in close proximity, the method comprising: deploying a sensor array in a non-producing well, the sensor array comprising a plurality of sensors connected along the length of a conducting line; substantially simultaneously obtaining a measurement by each of the sensors in the array of a downhole property; and determining, based on the measurement, a well status or property of an adjacent well.

[00213] Statement 150: The method according to statement 149, where the downhole property is a well pressure.

[00214] Statement 151: The method according to statement 149 or 150, where the downhole property is a temperature.

[00215] Statement 152: The method according to any of the preceding statements 149-151, wherein "substantially simultaneously" is defined as obtaining a measurement by each of the sensors in the sensor array within a time period of one second.

[00216] Statement 153: The method according to any of the preceding statements 149-152, wherein "substantially simultaneously" is defined as obtaining a measurement by each of the sensors in the sensor array within a time period of one minute.

[00217] Statement 154: The method according to any of the preceding statements 149-153, wherein "substantially simultaneously" is defined as obtaining a measurement by each of the sensors in the sensor array within a time period of one hour.

[00218] Statement 155: The method according to any of the preceding statements 149-154, wherein the adjacent well is under a stimulation treatment.

[00219] Statement 156: The method according to any one of the preceding statements 149-155, wherein the well state of the adjacent well is a state of a stimulation process in the adjacent well.

[00220] Statement 157: The method according to any one of the preceding statements 149-156, wherein the wellbore property of the adjacent well is a flow rate of a fluid in the adjacent well.

[00221] Statement 158: The method according to any of the preceding statements 149-157, further comprising, prior to obtaining a measurement, conducting a field perimeter injection, in which the well and adjacent wells are within the perimeter of the field.

Claims (29)

1. Method of determining bottom-hole properties (13) with an array of sensors (100), characterized in that it comprises: deploying a tubular column (22) within a well (13), the tubular column (22 ) having a central flow passage (33) and an outer surface (31); deploying a coil sensor array (100), wherein the coil sensor array (100) comprises a plurality of sensors (101) and is coupled to the tubular column (22); measurement of a property of a fluid within the tubular column (22) with at least one sensor of the array of sensors (100) in coil, wherein the tubular column (22) along its length has a flow port (30, 32) extending from the central flow passage (33) to the outer surface (31); deploying a pair of isolation packers, the pair of isolation packers comprising a first isolation pack and a second isolation pack; and deploying a secondary packer (25) between the pair of insulation packers, wherein at least one of the plurality of sensors (101) is located between the first insulation packer and the secondary packer (25) and at least one other of the a plurality of sensors (101) located between the second insulation packer and the secondary packer (25), wherein deployment of the at least one secondary packer (25) comprises locating the secondary packer (25) over a flow regulator (40 ). 2. Method according to claim 1, characterized in that the at least one sensor of the sensor array (100) in coil is connected via a conductive line (110) with one or more other sensors of the sensor array ( 100) on coil. 3. Method according to claim 1, characterized in that the tubular column (22) along its length has a flow port (30, 32) extending from the central flow passage (33) to the surface (31), the method further comprising positioning the at least one sensor close enough to the flow port (30, 32) to detect a property of the internal fluid within the central flow passage (33). 4. Method according to claim 1, characterized in that the property is one or more of temperature, pressure or flow rate. 5. Method according to claim 1, characterized in that the flow regulator (40) is one of an inlet control device (ICD), autonomous inlet control device (AICD), inlet control valve (ICV), choke, nozzle, deflector, restrictor, tube or valve. 6. Method of determining bottom-hole properties (13) with an array of sensors (100), characterized in that it comprises: deploying a tubular column (22) within a well (13), the tubular column (22 ) having a central flow passage (33) and an outer surface (31); deploying a coil sensor array (100) comprising a plurality of sensors (101); coupling the coiled array of sensors (100) including a plurality of sensors (101) to the tubular string (22); deployment of a pair of zonal isolation packers (26) for isolating a production zone (37), wherein at least two sensors of the plurality of sensors (101) of the array of sensors (100) in coil are located within the zone of production (37), a first of the at least two sensors being located upstream of an initial flow regulator (500) and a second of the at least two sensors being located downstream of the initial flow regulator (500); and deploying the second of the at least two sensors to have a fluid coupling to the initial flow regulator (500) measuring a property of the fluid leaving the initial flow regulator (500). 7. Method according to claim 6, characterized in that it further comprises: receiving the first pressure data, in a processor (220), from the first of the at least two sensors; receiving second pressure data at the processor (220) from the second of the at least two sensors; determining, in the processor (220), a differential pressure based on a difference between the first pressure data and the second pressure data; calculating, in the processor (220), a fluid flow rate within the production zone (37) based on the differential pressure. 8. Method according to claim 6, characterized in that it further comprises implanting the first of at least two sensors on or in close proximity to a screen (50). 9. Method according to claim 6, characterized in that a pair of secondary packers (25) isolates a zone having the second of at least two sensors between the initial flow regulator (500) and an additional flow regulator ( 520). 10. Method according to claim 6, characterized in that a third sensor of the plurality of sensors (101) is located downstream of an additional flow regulator (520), the additional flow regulator (520) being downstream of the initial flow regulator (500). 11. Method according to claim 10, characterized in that it further comprises: receiving the first pressure data, in a processor (220), from the first of the at least two sensors; receiving second pressure data at the processor (220) from the second of the at least two sensors; receiving third pressure data at the processor (220) from the third sensor; determining, in the processor (220), a first differential pressure based on the difference between the first pressure data and the second pressure data; determining, in the processor (220), a second differential pressure based on a difference between the second pressure data and the third pressure data; and calculating, in the processor (220), a corresponding production zone (37) fluid flow rate based on the first differential pressure and the second differential pressure. 12. Downhole property determination system (13) with array of sensors (100), characterized in that it comprises: a tubular column (22) positioned inside a well (13), the tubular column (22) having a central flow passage (33) and an outer surface (31); and a coiled array of sensors (100) provided along the tubular column (22), wherein the coiled sensor array (100) comprises a plurality of sensors (101) and is coupled to the tubular column (22), the array of sensors (100) in coil being operable to measure a property of a fluid within the tubular column (22) with at least one sensor of the array of sensors (100) in coil, wherein the tubular column (22) along its length has a flow port (30, 32) extending from the central flow passage (33) to the outer surface (31); a pair of insulation packers, the pair of insulation packers comprising a first insulation packer and a second insulation packer; a secondary packer (25) located between the pair of insulation packers, wherein at least one of the plurality of sensors (101) is located between the first insulation packer and the secondary packer (25) and at least one other of the plurality of sensors sensors (101) located between the second insulation pack and the secondary pack (25); and a processor (220) communicatively coupled to the coiled array of sensors (100) and operable to obtain data from the plurality of sensors (101), wherein the secondary packer (25) is positioned over a flow regulator (40). 13. System according to claim 12, characterized in that the at least one sensor of the sensor matrix (100) in coil is connected through a conductive line (110) with one or more other sensors of the sensor matrix ( 100) on coil. 14. System according to claim 12, characterized in that the tubular column (22) along its length has a flow port (30, 32) extending from the central flow passage (33) to the surface external (31), the at least one sensor close enough to the flow port (30, 32) to detect a property of the internal fluid within the central flow passage (33). 15. System according to claim 12, characterized in that the property is one or more of temperature, pressure or flow rate. 16. System for determining downhole properties (13) with array of sensors (100), characterized in that it comprises: a tubular having a central flow passage (33) for an internal fluid and an external surface (31 ); at least one pair of zonal isolation packers (26) operable to be coupled to the tubular and operable to create a production zone (37); a coiled sensor array coupled to the tubular and having a plurality of sensors (101); at least one flow regulator (40), each of the at least one flow regulator (40) corresponding to each pair of the at least one pair of zonal isolation packers (26), the at least one flow regulator (40) coupled to the tubular and operable to allow fluid to flow from the outer surface (31) of the tubular to the central flow passage (33); and at least two of the plurality of sensors (101) being located between a corresponding pair of the at least one pair of zonal isolation packers (26), the at least two of the plurality of sensors (101) comprising: a first sensor located upstream an initial flow regulator (500) of the at least one flow regulator (40); a second sensor located downstream of the initial flow regulator (500); a processor (220) coupled to the corresponding first and second sensor sensors, the processor (220) operable to determine a pressure differential between the corresponding first and second sensors, wherein the processor (220) is operable to calculate a rate of fluid flow from the production zone (37) corresponding based on the pressure differential; an additional flow regulator (520); and the plurality of sensors (101) further comprising a third sensor, wherein the third sensor is located downstream of the additional flow regulator (520), and wherein the processor (220) is coupled to a third sensor and is operable to : determine an additional differential pressure between the second and third corresponding sensors; and calculating a corresponding production zone (37) fluid flow rate based on the differential pressure and the additional differential pressure. 17. System according to claim 16, characterized in that a pair of secondary packers (25) isolates a zone having the second sensor between the initial flow regulator (500) and the additional flow regulator (520). 18. System according to claim 16, characterized in that the first sensor is implanted in or close to a screen (50). 19. System according to claim 16, characterized in that it further comprises the second sensor having a fluid coupling to the initial flow regulator (500) for measuring a property of the fluid leaving the initial flow regulator (500) . 20. Tubular column (22), characterized in that it comprises: a tubular having a central flow passage (33) and an outer surface (31); a coiled sensor array (100) coupled to the tubular, wherein the coiled sensor array (100) comprises a plurality of sensors (101) and is coupled to the tubular column (22) during deployment; the coil sensor array (100) operable to measure a property of a fluid within the tubular column (22) with at least one sensor of the coil sensor array (100), wherein the tubular column (22) along its length has a flow port (30, 32) extending from the central flow passage (33) to the outer surface (31); a pair of insulation packers, the pair of insulation packers comprising a first insulation packer and a second insulation packer; and a secondary packer (25) located between the pair of insulation packers, wherein at least one of the plurality of sensors (101) is located between the first insulation packer and the secondary packer (25) and at least one other of the plurality of sensors (101) located between the second insulation pack and the secondary pack (25), wherein the secondary pack (25) is located over a flow regulator (40). 21. Tubular column (22) according to claim 20, characterized in that the at least one sensor of the array of sensors (100) in coil is connected via a conductive line (110) with one or more other sensors of the array of sensors (100) on coil. 22. Tubular column (22) according to claim 20, characterized in that the tubular column (22) along its length has a flow port (30, 32) extending from the central flow passage (33 ) to the outer surface (31), the at least one sensor close to the flow port (30, 32) sufficient to detect a property of the internal fluid within the central flow passage (33). 23. Tubular column (22) according to claim 20, characterized in that the property is one or more of temperature, pressure or flow rate. 24. A tubular column (22), characterized in that it comprises: a tubular having a central flow passage (33) for an internal fluid and an external surface (31); at least one pair of zonal isolation packers (26) operable to be coupled to the tubular; a coiled sensor array coupled to the tubular and having a plurality of sensors (101); at least one flow regulator (40), for each pair of the at least one pair of zonal isolation packers (26), coupled to the tubular and operable to allow fluid to flow from the outer surface (31) of the tubular to the passage of central flow (33); and at least two of the plurality of sensors (101) being located between a corresponding pair of the at least one pair of zonal isolation packers (26), the at least two of the plurality of sensors (101) comprising: a first sensor located upstream an initial flow regulator (500) of the at least one flow regulator (40); and a second sensor located downstream of the initial flow regulator (500), wherein a third sensor is located downstream of an additional flow regulator (520), the additional flow regulator (520) being downstream of the flow regulator initial (500). 25. Tubular column (22) according to claim 24, characterized in that the first sensor is implanted in or close to a screen (50). 26. Tubular column (22) according to claim 24, characterized in that the initial flow regulator (500) is an input control device (ICD) and the additional flow regulator (520) is a control device. autonomous entry control (AICD). 27. Tubular column (22) according to claim 24, characterized in that a pair of secondary packers (25) isolates a zone having the second sensor between the initial flow regulator (500) and the additional flow regulator ( 520). 28. Tubular column (22) according to claim 24, characterized in that: a plurality of pairs of zonal isolation packers (26) coupled to the tubular to isolate a corresponding number of production zones, in which at least two of the plurality of sensors (101) are located within the production zones; wherein the at least two of the plurality of sensors (101) comprise a first sensor being located upstream of an initial flow regulator (500) and a second sensor being located downstream of the initial flow regulator (500). 29. Tubular column (22) according to claim 24, characterized in that the initial flow regulator (500) is one of an input control device (ICD), autonomous input control device (AICD), inlet control valve (ICV), choke, nozzle, baffle, restrictor, tube or valve.