CN111577257B - Horizontal well subsection setting type flow metering water exploration pipe column and water exploration method thereof - Google Patents
Horizontal well subsection setting type flow metering water exploration pipe column and water exploration method thereof Download PDFInfo
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- CN111577257B CN111577257B CN202010565422.9A CN202010565422A CN111577257B CN 111577257 B CN111577257 B CN 111577257B CN 202010565422 A CN202010565422 A CN 202010565422A CN 111577257 B CN111577257 B CN 111577257B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
Abstract
The invention relates to a horizontal well subsection setting type flow metering water finding pipe column and a water finding method thereof, wherein the water finding pipe column comprises a first packer, a second packer and a water finding controller; the water finding controller comprises a low-pressure pump, a high-pressure pump and a control module. The diameter of the rubber cylinder of the first packer and the diameter of the rubber cylinder of the second packer are smaller than the inner diameter of the production casing, a cavity is arranged between the rubber cylinder and the central pipe, the cavity is communicated with one end of a low-pressure pump through a pipeline, and the other end of the low-pressure pump is communicated with the inside of the water exploration pipe column. According to the water exploration pipe column, the cavity of the packer is filled with the fluid to be expanded and sealed, so that the packer can be used for sealing each layer section of the horizontal well. And a high-pressure pump is adopted to convey fluid in the water exploration pipe column to the ground surface through a continuous oil pipe, so that low-risk and high-efficiency water exploration is carried out on the non-flowing well.
Description
Technical Field
The invention relates to the technical field of oil and gas production in oil and gas fields, in particular to a horizontal well sectional setting type flow metering water finding pipe column and a water finding method thereof.
Background
Horizontal wells are special wells having a maximum well deviation angle of up to or near 90 (typically no less than 86) and maintaining a horizontal well section of a certain length in the zone of interest. The horizontal well is suitable for thin oil-gas reservoirs or fractured oil-gas reservoirs and aims to increase the exposed area of the oil-gas reservoirs. In the production process of the horizontal well, if the oil well produces water, a water outlet layer needs to be accurately detected. At present, the water exploration of the horizontal well mainly uses a water exploration pipe column, and a packing cup packer can be selectively used for the water exploration pipe column to explore water in a layered mode. The key part of the packing cup packer is a conical packing cup which is formed by vulcanizing rubber on a metal framework, the oil sleeve annulus is sealed by interference of the packing cup and the inner wall of the production casing, and the packing cup expands the sealed annulus under the action of pressure difference in the well, so that the packing cup packer can only bear large pressure difference in one direction.
The existing water exploration pipe column has the following defects:
1. the diameter of a packing cup packer of the existing water finding pipe column is slightly larger than the inner diameter of a production casing pipe, and because the packing cup can not retract, the packing cup can only be dragged into a horizontal section in a well, so that the damage to the sealing effect and the service life of the packing cup is great, and the efficiency of layered water finding is also influenced. And because some high-water-cut horizontal wells are often communicated with the channeling of the corresponding water injection well, and the wellhead of the high-water-cut horizontal well is self-sprayed (sleeved back), the cup packer cannot be put into the underground, if a bidirectional slip packer is selected, the horizontal section of the horizontal well is easy to have difficulty in deblocking, and the construction process is complex.
2. Because the underground fluid of the non-flowing well is subjected to low formation pressure and cannot automatically rise to the ground, the conventional water exploration pipe column is only suitable for exploring water in a high-water-content flowing (casing-returning) horizontal well, and low-risk and high-efficiency water exploration cannot be realized for a non-flowing production well.
Therefore, the sectional seating-sealing type flow metering water exploration pipe column for the horizontal well and the water exploration method thereof are needed to be provided, wherein the sectional seating-sealing type flow metering water exploration pipe column is convenient to construct and can realize water exploration for a non-flowing well.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides a horizontal well sectional setting type flow metering water exploration pipe column and a water exploration method thereof, and solves the technical problems that the existing water exploration pipe column has too large packer diameter and cannot be put into a high water content flowing well, and the existing water exploration pipe column cannot conduct low-risk high-efficiency water exploration on a non-flowing well.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, the embodiment of the invention provides a horizontal well subsection setting type flow metering water exploration pipe column, which is used for entering a production casing to explore water, wherein a guider, an opening circular short section, a switchable short section, a first packer, a switchable water exploration channel short section, a water exploration controller and a second packer are sequentially connected to the water exploration pipe column from a toe section to a heel section in a downhole horizontal section; the water exploration pipe column is communicated with a ground wellhead through a coiled tubing; the tapping circulation nipple is used for carrying out sand washing treatment on the production casing;
the water finding controller comprises a low-pressure pump and a control module; the switchable nipple joint and the switchable water detection passage nipple joint are electrically connected with the control module and are opened or closed under the control of the control module;
the first packer and the second packer comprise rubber cylinders and a central pipe, and the rubber cylinders are sleeved on the outer wall of the central pipe; the diameter of the rubber cylinder is smaller than the inner diameter of the production casing, a cavity is arranged between the rubber cylinder and the central pipe, the cavity is communicated with one end of the low-pressure pump through a pipeline, and the other end of the low-pressure pump is communicated with the inside of the central pipe;
the water finding controller also comprises a high-pressure pump which is used for conveying the fluid in the water finding pipe column to the ground surface through a continuous oil pipe; the low-pressure pump and the high-pressure pump are electrically connected with the control module and run under the control of the control module;
and electromagnetic valves are arranged on pipelines between the cavities of the first packer and the second packer and the low-pressure pump, are electrically connected with the control module, and open or close the pipelines under the control of the control module.
The horizontal well sectional setting type flow metering water exploration pipe column provided by the embodiment of the invention has the beneficial effects that the water exploration pipe column can be easily put into a self-injection well because the diameter of the rubber sleeve of the packer is smaller than the inner diameter of a production casing pipe, the packer setting and the unpacking are simple and convenient, and the water exploration efficiency of the horizontal well is improved. The function of producing casing pipe plugging by reverse sand washing treatment can be realized by opening a hole circulation nipple and a water exploration pipe column, the bottom hole plugging sand is washed away by high-speed flowing liquid, and the washed away sand is taken out of the ground by the circulating capacity of upward return of liquid flow circulation, so that the accumulated sand at the bottom hole is removed, and the yield of a well or the injection amount of a water injection well is recovered and improved. The high-pressure pump conveys the fluid in the water exploration pipe column to the ground surface, and the problem that the formation pressure of a non-flowing well is not enough to enable the underground fluid to rise to a ground wellhead is solved. The solenoid valve opens or closes the tubing, controlling the volume of fluid in the cavity, ensuring that the packer is set or unset.
Optionally, the water finding controller further comprises a water content analyzer, wherein the water content analyzer is mounted on the inner wall of the water finding pipe column and used for measuring the water content proportion of the fluid in the water finding pipe column; the water content analyzer is electrically connected with the control module and operates under the control of the control module.
Optionally, the water finding controller further comprises a sampler, wherein the sampler is mounted on the inner wall of the water finding pipe column and is used for sampling fluid in the water finding pipe column; the sampler is electrically connected with the control module and runs under the control of the control module.
Optionally, the water finding controller further comprises a storage battery module, or a cable is arranged in the coiled tubing; the cable or the battery module is electrically connected with other parts of the water finding controller.
Optionally, the water exploration pipe string is communicated with the coiled tubing through a coiled tubing controllable releasing tool and a coiled tubing connecting tool. Through the controllable releasing tool of coiled tubing, coiled tubing and the detachable connection of water finding tubular column can carry out urgent releasing when the water finding tubular column carries out the operation and meets unexpected situation to play coiled tubing in order to vacate the passageway, the salvage of the instrument in the pit of being convenient for and the processing of follow-up accident effectively reduce the operation risk, reduce economic loss.
Optionally, the ground wellhead is communicated with the ground storage tank through coiled tubing ground corollary equipment and a ground pipeline, and the ground pipeline is provided with a metering device. The metering device is used for detecting production dynamic data of liquid production, gas production, water content and the like of fluid in the ground pipeline.
In a second aspect, the embodiment of the present invention provides a method for carrying out water exploration on an oil well or a gas well by using the above water exploration pipe column, which includes the following steps:
s1, setting a water exploration pipe column: after the water exploration pipe column is combined, the switchable short section is opened through the control module, then the water exploration pipe column is put into the well until the water exploration pipe column is put to a preset position, and the first packer and the second packer are used for realizing up-down sealing of a perforation section or a sliding sleeve of a water exploration horizontal section;
s2, production of a combined layer: opening the switchable water detection channel short section through a control module, producing for 0.5-3 days, and recording production dynamic data, wherein the production dynamic data are liquid production data, gas production data and water content data so as to be compared and analyzed with later-stage water detection dynamic data in the same production flow;
s3, closing a circulation channel: the switchable short section is closed through the control module;
s4, setting and pressure testing: through a control module, the short section of the switchable water detection channel is closed, the electromagnetic valve is opened, the low-pressure pump is started, and fluid is pumped into a cavity between the rubber cylinders of the first packer and the second packer and the central pipe; after the cavity pumps fluid with a preset volume, the electromagnetic valve and the low-pressure pump are closed through the control module, and the setting of the first packer and the second packer is completed; injecting water into the water finding pipe column through a cement truck on the ground, pressurizing to 10-15MPa, and confirming that the water finding pipe column is normally sealed and has no leakage;
s5, segmented water detection: the switchable water finding channel short section is opened through the control module for production; the formation fluid enters a water finding pipe column, and the water content data of the formation fluid is read by a water content analyzer on the ground; after the target interval is tested, the electromagnetic valve is opened through the control module, the low-pressure pump is started, the low-pressure pump reversely pumps out fluid from the cavities of the first packer and the second packer, and the first packer and the second packer are unsealed;
s6, opening the switch short section through the control module, lifting the water exploration pipe column to the next target layer section, and executing the steps S3 to S5 until water exploration operation of all layer sections is completed;
s7, pulling out the water exploration pipe column: and confirming that the first packer and the second packer are in the deblocking state, and pulling out the water exploration pipe column.
According to the method for carrying out water exploration on the oil well or the gas well by using the water exploration pipe column, the packer with the cavity is adopted, so that the setting and the unsealing are simple and convenient, and the water exploration efficiency of the horizontal well is improved.
Optionally, the production casing is subjected to a sand wash treatment before or during step S1: pumping sand washing liquid into an annular space formed by the continuous oil pipe and the production casing by a pump truck on the ground to wash away the sand blockage at the bottom of the well, and making the washed away sand enter the water exploration pipe column through the perforated circulating nipple by using the circulating capacity of the sand washing liquid to circulate upward, and then rising to the ground well mouth along the continuous oil pipe.
Optionally, in step S2 and step S5, the control module activates a high-pressure pump, and the high-pressure pump delivers the fluid in the water exploration pipe column to the surface wellhead.
(III) advantageous effects
The beneficial effects of the invention are: according to the sectional setting type flow metering water finding tubular column for the horizontal well and the water finding method thereof, the fluid is filled into the cavity between the rubber sleeve and the central pipe of the packer to be expanded and set, and each section of the horizontal well is sealed. The diameter of the rubber cylinder is smaller than the inner diameter of the production casing, and when the packer is put into a well, the rubber cylinder cannot rub against the production casing, so that the service life of the rubber cylinder of the packer is prolonged, and the maintenance cost is reduced.
The water exploration pipe column disclosed by the invention solves the water exploration problem of a non-flowing production well by adopting the high-pressure pump, the fluid in the water exploration pipe column is conveyed to the ground surface by the high-pressure pump through the continuous oil pipe, an eccentric well head and an oil well pump are not required to be arranged on the ground surface, and the water exploration pipe column is convenient and easy to use on site.
The water exploration pipe column adopts the water content analyzer arranged on the inner wall of the water exploration pipe column, and the water content analyzer can realize the function of measuring and detecting the water content of produced formation fluid under the control of the control module.
The water exploration pipe column adopts the structure that the sampler is arranged on the inner wall of the water exploration pipe column, the sampler samples and stores fluid in the water exploration pipe column under the control of the control module, and the fluid in the sampler can be taken out along with the rising of the water exploration pipe column to the ground.
Drawings
FIG. 1 is a schematic diagram of a horizontal well sectional setting type flow metering water exploration pipe column working underground for water exploration;
FIG. 2 is a schematic illustration of a portion of the components of the water exploration pipe string of FIG. 1;
FIG. 3 is a cross-sectional view of the water exploration tubing string of FIG. 2 taken along the axial direction of the tubing string;
fig. 4 isbase:Sub>A schematic sectional view alongbase:Sub>A-base:Sub>A of the water finding column in fig. 2.
[ description of reference ]
1: a guide; 2: a sliding sleeve; 3: opening the circulating short section; 4: a switchable short section; 5: a first packer; 6: a short joint capable of opening and closing a water finding channel; 7: a water finding controller; 8: a second packer; 9: a coiled tubing controllable releasing tool; 10: a coiled tubing connection tool; 11: a coiled tubing; 12: producing a sleeve; 13: producing an oil pipe; 14: a ground wellhead; 15: coiled tubing operation wellhead assembly; 16: a gooseneck of the continuous oil pipe; 17: coiled tubing work equipment; 18: a surface pipeline; 19: a ground metering device; 20: a ground storage tank; 21: an electromagnetic valve; 22: a low pressure pump; 23: a rubber cylinder limiting and sealing device; 24: a control module; 25: a high pressure pump; 26: and (5) a rubber cylinder.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. Where directional terms such as "upper", "lower", etc. are used herein, reference is made to the orientation of fig. 1. Downhole, away from the surface wellhead 14, is down, and near the surface wellhead 14 is up.
The horizontal well subsection setting type flow metering water finding pipe column and the water finding method thereof provided by the embodiment of the invention have the advantages that the diameter of the rubber cylinder 26 of the packer is slightly smaller than the inner diameter of the production casing 12, the rubber cylinder 26 can be expanded, and the cavity between the rubber cylinder 26 and the central pipe of the packer is filled with the fluid to be expanded and set, so that each layer section of the horizontal well is sealed. And a high-pressure pump 25 is adopted to convey the fluid in the water exploration pipe column to the ground surface through the coiled tubing 11, so that low-risk and high-efficiency water exploration for the non-flowing well is realized.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Detailed description of the preferred embodiments
Referring to fig. 1, an oil or gas well is constructed by drilling a borehole down from the surface, running a production casing 12 down the borehole, and cementing the annulus between the production casing 12 and the borehole. After the well cementation is finished, a horizontal well perforation section is formed by detonating a perforating gun in a target layer, or the sliding sleeve 2 is opened in a pressing mode inside the production casing 12 to establish a fracturing channel, and fluid in the stratum can enter the production casing 12 through the horizontal well perforation section or the sliding sleeve 2. Formation fluids include primarily oil, gas, and water.
One end of the water finding pipe column is connected with one end of a coiled tubing 11 through a controllable releasing tool 9 and a coiled tubing connecting tool 10, the other end of the coiled tubing 11 is connected with a ground well head 14, and the ground well head 14 is connected with a ground storage tank 20 through coiled tubing ground matched equipment, a ground pipeline 18 and a metering device 19. Through the controllable releasing tool 9 of coiled tubing, coiled tubing 11 and the detachable connection of water exploration tubular column can carry out urgent releasing when the water exploration tubular column carries out the operation and meets unexpected clear situation to play coiled tubing 11 in order to vacate the passageway, the salvage of the instrument in the pit of being convenient for and the processing of follow-up accident effectively reduce the operation risk, reduce economic loss. The coiled tubing 11 is the equipment that needs to be used only for performing special operations, and plays a role in conveying the tools on the ground to the underground, and meanwhile, the coiled tubing has a small-diameter internal channel, so that underground fluid can be conveyed to the ground through the small-diameter channel when needed.
If not a flowing well, the oil and gas development site is typically provided with production tubing 13 in the annular space between coiled tubing 11 and production casing 12, production tubing 13 being the conduit for oil and gas production.
The ground matched equipment for the continuous oil pipe comprises: a coiled tubing operation wellhead device 15, a coiled tubing gooseneck 16 and coiled tubing operation equipment 17. The coiled tubing work equipment 17 is provided with a reel to lower and raise the coiled tubing 11 into and out of the well (production tubing 12 or production casing 13) during operation and to wind the coiled tubing 11 onto the reel for removal.
Through the metering device 19, production dynamic data such as liquid production, gas production, water content and the like of the fluid in the ground pipeline 18 can be detected.
The tip of looking for the water tubular column is provided with director 1, the upper end of director 1 is passed through oil pipe and is connected with the lower extreme of opening circulation nipple joint 3, the upper end of opening circulation nipple joint 3 is connected with the lower extreme of switch nipple joint 4, the upper end of switch nipple joint 4 is passed through oil pipe and is connected with the lower extreme of first packer 5, the upper end of first packer 5 is passed through oil pipe and is connected with the lower extreme of switch water-seeking passage nipple joint 6, the upper end of switch water-seeking passage nipple joint 6 is passed through oil pipe and is connected with the lower extreme of looking for water controller 7, the upper end of looking for water controller 7 is connected with the lower extreme of second packer 8.
The opening circulation nipple 3 plays a role of circulating liquid in a water exploration pipe column, is drilled with a plurality of holes in a conventional oil pipe, is in a normally open state, cannot be closed and does not need to be closed. The function of the reverse sand washing treatment production casing pipe 12 can be realized by the hole opening circulation nipple 3 and the water exploration pipe column, the well bottom sand plug is washed away by high-speed flowing liquid, and the washed away sand is taken out of the ground by the circulation capability of the liquid flow circulation upward return, so that the accumulated sand at the well bottom is removed, and the well yield or the injection amount of the water injection well is recovered and improved.
Referring to fig. 2, 3 and 4, the water finding controller 7 includes a control module 24, a low pressure pump 22, a high pressure pump 25, a moisture analyzer, a sampler, and a battery module.
The control module 24, low pressure pump 22, high pressure pump 25, moisture analyzer and sampler are all electrically connected to the battery module, which supplies power thereto. It should be noted here that the battery module can also be replaced by a cable, which is arranged in the coiled tubing 11, running from the surface downhole.
The switchable nipple 4 and the switchable water detection passage nipple 6 are electrically connected with the control module 24, and are opened or closed under the control of the control module 24, and the switchable water detection passage nipple 6 controls fluid to enter the water detection pipe column; but switch nipple joint 4 is discoid, sets up in the water exploration tubular column, plays the effect of opening or closing the tubular column inner chamber, and the control is followed opening circulation nipple joint 3 and is got into the fluid of water exploration tubular column front end and is flowed to water exploration tubular column rear end.
The first packer 5 and the second packer 8 comprise a central pipe, a rubber cylinder 26 and an electromagnetic valve 21, and the diameters of the first packer 5 and the second packer 8 are smaller than the inner diameter of the production casing 12; the rubber cylinder 26 is sleeved on the outer wall of the central tube and can expand or contract, and a cavity is arranged between the rubber cylinder 26 and the central tube. The outer wall of the central tube is provided with a rubber sleeve limiting and sealing device 23 for sealing a cavity between the rubber sleeve 26 and the central tube and limiting the movement of the rubber sleeve 26 on the outer wall of the central tube. The diameter of the packing elements 26 of the first and second packers 5, 8 when inflated is larger than the inner diameter of the production casing 12 and the diameter of the packing elements 26 when deflated is smaller than the inner diameter of the production casing 12. One end of the low-pressure pump 22 is communicated with the cavity through a pipeline, the other end of the low-pressure pump is communicated with the interior of the central tube, and an electromagnetic valve 21 is further installed on the pipeline between the low-pressure pump 22 and the cavity. The electromagnetic valve 21 and the low-pressure pump 22 are both electrically connected with the control module 24, under the control of the control module 24, the electromagnetic valve 21 opens or closes a pipeline, and the low-pressure pump 22 pumps or pumps fluid into a cavity between the rubber sleeve 26 and the central pipe, so that the first packer 5 and the second packer 8 can be set or unset. Control module 24 may be programmed with work instructions at the surface and automatically execute the relevant instructions to perform work when run downhole. The control module 24 may also be wired to ground equipment where an operator issues work instructions to the control module 24.
The high-pressure pump 25 is electrically connected with the control module 24, and under the control of the control module 24, the high-pressure pump 25 operates to convey fluid in the water exploration pipe column to the earth surface through the continuous oil pipe 11, and the earth surface does not need to be provided with an eccentric well mouth and an oil well pump, so that the water exploration device is convenient and easy to use on site, and realizes low-risk and high-efficiency water exploration of a non-flowing production well.
When the first packer 5 and the second packer 8 are set or unset, a low pressure pump 22 is used to pump or withdraw fluid into the cavity between the packing element 26 and the base pipe, causing the packing element 26 to expand or retract. During production and water recovery from a non-flowing well, the formation pressure of the non-flowing well is not sufficient to raise the downhole fluid to the surface wellhead 14, requiring it to be pumped to the surface wellhead 14 by the high pressure pump 25. The lift of the high-pressure pump 25 is larger than that of the low-pressure pump 22, the volume of the high-pressure pump 25 is larger than that of the low-pressure pump 22, the low-pressure pump 22 can pump water in two directions, and the high-pressure pump 25 pumps water in one direction.
The water content analyzer is arranged on the inner wall of the water exploration pipe column and is electrically connected with the control module 24, and the function of measuring and detecting the water content of produced formation fluid can be realized under the control of the control module 24.
The sampler is installed on the inner wall of the water finding pipe column, and under the control of the control module, the sampler samples and stores the fluid in the water finding pipe column, and the fluid in the sampler can be taken out along with the water finding pipe column to the ground.
The invention provides a method for carrying out water exploration on an oil well or a gas well by utilizing the water exploration pipe column, which comprises the following steps:
s1, setting a water exploration pipe column: after the water exploration pipe column is combined, the switchable short section 4 is opened through the control module 24, then the coiled tubing 11 and the water exploration pipe column are put into the well through the coiled tubing operation equipment 17 until the coiled tubing is put to a preset position, and the first packer 5 and the second packer 8 are enabled to realize up-down sealing of the perforation section or the sliding sleeve 2 of the water exploration horizontal section; when the water exploration pipe column is put into a well, the switchable short section 4 is opened in advance, so that the whole water exploration pipe column is communicated;
s2, producing a combined layer: opening the switchable water detection channel short section 6 through the control module 24, producing for 0.5-3 days, and recording production dynamic data, wherein the production dynamic data are liquid production data, gas production data and water content data so as to be compared and analyzed with later-stage water detection dynamic data in the same production flow;
s3, closing a circulation channel: the switchable short section 4 is closed through the control module 24;
s4, setting and pressure testing: by a control module 24, the switchable water detection passage nipple 6 is closed, the electromagnetic valve 21 is opened, the low-pressure pump 22 is started, and fluid is pumped into a cavity between the rubber cylinders 26 of the first packer 5 and the second packer 8 and the central pipe; after the cavity pumps fluid with a preset volume, the electromagnetic valve 21 and the low-pressure pump 22 are closed through the control module 24, and the setting of the first packer 5 and the second packer 8 is completed; injecting water into the water finding pipe column through a cement truck on the ground, pressurizing to 10-15MPa, and confirming that the water finding pipe column is normally sealed and has no leakage;
s5, segmented water detection: the switchable water finding passage nipple 6 is opened through the control module 24 for production; the formation fluid enters a water finding pipe column, and the water content data of the formation fluid is read by a water content analyzer on the ground; after the target interval is tested, the control module 24 opens the electromagnetic valve 21, starts the low-pressure pump 22, reversely pumps out fluid from the cavities of the first packer 5 and the second packer 8 by the low-pressure pump 22, and unseals the first packer 5 and the second packer 8;
s6, opening the switch short section 4 through the control module 24, lifting the water exploration pipe column to the next target layer section, and then executing the steps S3 to S5 until the water exploration operation of all layer sections is finished; the water reservoir section is comprehensively judged by testing the fluid water content proportion parameters of the clamping sections in a segmented manner, and the water finding accuracy and the water finding efficiency of the horizontal well are improved.
S7, pulling out the water exploration pipe column: and confirming that the first packer 5 and the second packer 8 are in the unsealing state, and pulling out the coiled tubing 11 and the water exploration pipe column through the coiled tubing operation equipment 17.
Further, prior to or during step S1, the sand washing treatment of the production casing 12 may be carried out as required by the field work: pumping sand washing liquid into an annular space formed by the continuous oil pipe 11 and the production casing 12 by using a pump truck on the ground to wash away the sand blockage at the bottom of the well, and making the washed away sand enter the water exploration pipe column through the perforated circulating nipple 3 by using the circulating capacity of the sand washing liquid to circularly return upwards, and then rising to the ground well mouth 14 along the continuous oil pipe 11. The sand washing liquid is pumped from the annular space formed by the continuous oil pipe 11 and the production casing 12, sand washing is carried out reversely, and sand blockage of the packer is avoided.
Further, in steps S2 and S5, the control module 24 activates the high-pressure pump 25, and the high-pressure pump 25 delivers the fluid in the water exploration string to the surface wellhead 14. In the case of a flowing well, the high pressure pump 25 is not needed, and the formation fluid automatically rises to the surface due to the influence of the high formation pressure in the underground.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either internal to the two elements or in an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (9)
1. The utility model provides a horizontal well segmentation is sat and is sealed formula flow measurement and look for water tubular column for go into production sleeve pipe (12) interior water exploration, its characterized in that: the water exploration pipe column is sequentially connected with a guider (1), a hole opening circulating short section (3), a switchable short section (4), a first packer (5), a switchable water exploration channel short section (6), a water exploration controller (7) and a second packer (8) from a toe part to a heel part in a horizontal section under a well; the water exploration pipe column is communicated with a ground wellhead (14) through a coiled tubing (11); the hole opening circulation nipple (3) is used for carrying out sand washing treatment on the production casing (12);
the water finding controller (7) comprises a low-pressure pump (22) and a control module (24); the switchable short section (4) and the switchable water detection channel short section (6) are electrically connected with the control module (24) and are switched on or off under the control of the control module (24);
the first packer (5) and the second packer (8) comprise rubber cylinders (26) and a central pipe, and the rubber cylinders are sleeved on the outer wall of the central pipe; the diameter of the rubber cylinder (26) is smaller than the inner diameter of the production casing (12), a cavity is arranged between the rubber cylinder (26) and the central pipe, the cavity is communicated with one end of the low-pressure pump (22) through a pipeline, and the other end of the low-pressure pump (22) is communicated with the inside of the central pipe;
the water finding controller (7) also comprises a high-pressure pump (25) which is used for conveying the fluid in the water finding pipe column to the surface through the coiled tubing (11); the low-pressure pump (22) and the high-pressure pump (25) are electrically connected with the control module (24) and run under the control of the control module (24);
electromagnetic valves (21) are arranged on pipelines between the cavities of the first packer (5) and the second packer (8) and the low-pressure pump (22), the electromagnetic valves (21) are electrically connected with the control module (24), and the pipelines are opened or closed under the control of the control module (24).
2. The water exploration pipe string of claim 1, wherein: the water finding controller (7) also comprises a water content analyzer which is arranged on the inner wall of the water finding pipe column and is used for measuring the water content proportion of the fluid in the water finding pipe column; the moisture analyzer is electrically connected with the control module (24) and operates under the control of the control module (24).
3. The water exploration pipe string of claim 1, wherein: the water finding controller (7) also comprises a sampler, wherein the sampler is arranged on the inner wall of the water finding pipe column and is used for sampling fluid in the water finding pipe column; the sampler is electrically connected with the control module (24) and operates under the control of the control module (24).
4. The water exploration pipe string of any one of claims 1-3, wherein: the water finding controller (7) also comprises a storage battery module, or a cable is arranged in the continuous oil pipe (11); the cable or the storage battery module is electrically connected with other parts of the water finding controller (7).
5. The water exploration pipe string of claim 4, wherein: the water exploration pipe column is communicated with the coiled tubing (11) through a coiled tubing controllable releasing tool (9) and an oil tube connecting tool (10).
6. The water exploration pipe string of claim 4, wherein: the ground wellhead (14) is communicated with a ground storage tank (20) through coiled tubing ground corollary equipment and a ground pipeline (18), and the ground pipeline (18) is provided with a metering device (19).
7. A method of water exploration of an oil or gas well using a water exploration string as claimed in any one of claims 1 to 6, comprising the steps of:
s1, setting a water exploration pipe column: after the water exploration pipe column is combined, the switchable short section (4) is opened through the control module (24), then the water exploration pipe column is put into the well until the water exploration pipe column is put to a preset position, and the first packer (5) and the second packer (8) are used for vertically sealing the perforation section or the sliding sleeve (2) of the water exploration horizontal section;
s2, producing a combined layer: opening a switchable water detection channel short section (6) through a control module (24), producing for 0.5-3 days, and recording production dynamic data, wherein the production dynamic data are liquid production data, gas production data and water content data so as to be compared and analyzed with later-stage water detection dynamic data in the same production flow;
s3, closing a circulation channel: the switchable short section (4) is closed through a control module (24);
s4, setting and pressure testing: through a control module (24), a switchable water detection channel pup joint (6) is closed, an electromagnetic valve (21) is opened, a low-pressure pump (22) is started, and fluid is pumped into a cavity between a rubber cylinder (26) and a central pipe of a first packer (5) and a second packer (8); after the cavity pumps fluid with a preset volume, the electromagnetic valve (21) and the low-pressure pump (22) are closed through the control module (24), and the setting of the first packer (5) and the second packer (8) is completed; injecting water into the water finding pipe column through a cement truck on the ground, pressurizing to 10-15MPa, and confirming that the water finding pipe column is normally sealed and has no leakage;
s5, segmented water detection: the switchable water finding channel short joint (6) is opened through the control module (24) for production; the formation fluid enters a water finding pipe column, and the water content data of the formation fluid is read by a water content analyzer on the ground; after the target interval is tested, opening the electromagnetic valve (21) through the control module (24), starting the low-pressure pump (22), reversely pumping fluid from the cavities of the first packer (5) and the second packer (8) by the low-pressure pump (22), and unsealing the first packer (5) and the second packer (8);
s6, opening the switchable short section (4) through the control module (24), lifting the water exploration pipe column to the next target interval, and then executing the steps S3 to S5 until water exploration operation of all intervals is completed;
s7, pulling out the water exploration pipe column: and confirming that the first packer (5) and the second packer (8) are in the unsealing state, and pulling out the water exploration pipe column.
8. The method of claim 7, wherein: carrying out a sand washing treatment on the production casing (12) before or during step S1; pumping sand washing liquid into an annular space formed by the continuous oil pipe (11) and the production casing (12) by using a pump truck on the ground to wash away the sand blockage at the bottom of the well, and making the washed away sand enter the water exploration pipe column through the perforated circulating nipple (3) by using the circulating capacity of the sand washing liquid for circulating upward return, and then rising to the ground well mouth (14) along the continuous oil pipe (11).
9. The method of claim 7, wherein: in steps S2 and S5, the control module (24) starts the high-pressure pump (25), and the high-pressure pump (25) conveys the fluid in the water exploration pipe column to the ground wellhead (14).
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| CN202010565422.9A CN111577257B (en) | 2020-06-19 | 2020-06-19 | Horizontal well subsection setting type flow metering water exploration pipe column and water exploration method thereof |
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| CN202010565422.9A CN111577257B (en) | 2020-06-19 | 2020-06-19 | Horizontal well subsection setting type flow metering water exploration pipe column and water exploration method thereof |
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| CN112324425B (en) * | 2020-10-22 | 2023-07-14 | 东营杰开智能科技有限公司 | Coiled tubing layering test device and method |
| CN113266320A (en) * | 2021-05-31 | 2021-08-17 | 郭子晨 | Comprehensive intelligent water finding and blocking technology for oil well |
| CN116733454B (en) * | 2023-08-01 | 2024-01-02 | 西南石油大学 | Intelligent water finding method for horizontal well |
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