WO2016159776A1 - Système de mesure de contraintes de trou de forage et procédé de détermination d'instabilité de formation de puits de forage - Google Patents

Système de mesure de contraintes de trou de forage et procédé de détermination d'instabilité de formation de puits de forage Download PDF

Info

Publication number
WO2016159776A1
WO2016159776A1 PCT/NO2015/050223 NO2015050223W WO2016159776A1 WO 2016159776 A1 WO2016159776 A1 WO 2016159776A1 NO 2015050223 W NO2015050223 W NO 2015050223W WO 2016159776 A1 WO2016159776 A1 WO 2016159776A1
Authority
WO
WIPO (PCT)
Prior art keywords
stress
output signal
load cell
pressure
well bore
Prior art date
Application number
PCT/NO2015/050223
Other languages
English (en)
Inventor
Øivind GODAGER
Original Assignee
Sensor Developments As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NO20150384A external-priority patent/NO343542B1/en
Priority claimed from US14/671,047 external-priority patent/US10053980B2/en
Application filed by Sensor Developments As filed Critical Sensor Developments As
Publication of WO2016159776A1 publication Critical patent/WO2016159776A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B49/006—Measuring wall stresses in the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure

Definitions

  • the present invention relates to the technical field of stress measurements of a wellbore. More specifically it relates to the field of determining well bore formation instability by measuring stress outside a wellbore conduit and analysing resulting stress parameters.
  • Instabilities in we 11 bo res can have serious consequences, such as fracturing or collapse of the wellbore. Instabilities can be caused by changes in the surrounding formation due to e.g. erosion, and washout which will again lead to in-situ stresses. In some wellbores, and especially well bores with casing strings cemented in place, the stresses may build up over time, apparently without influencing drilling operations.
  • the formation surrounding an oil well may be composed of different materials, typically rock and sediments, as well as fluids.
  • the total vertical stress acting at a point in the formation is due to forces from any material or water above the point, i.e. particles, water, and other loads.
  • Effective stress controls shear strength, compression, distortion changes in strength, changes in volume, changes in shape etc. of the formation.
  • Effective stress represents the distribution of load carried by the soil over the area considered .
  • Total and effective stresses should be handled separately. Movements and instabilities can be caused by changes in total stress, such as loading by foundations and unloading due to slides. They can also be caused by changes in pore pressure. Sudden changes in wellbore stress may be caused by sudden fluid movements on the outside of the wellbore, thermal stress with time that is induced by either production of injection, sudden change in overburden pressures, compactions of formation related to depletion of underlying formations, etc.
  • the critical shear strength of the formation is a function of the effective normal stress and a change in the effective stress will lead to a change in strength.
  • US 5285 692 describes calculation of mean effective stress around the wellbore using geostatic overburden in situ stress, the field pore pressure and the total stress around the wellbore based on shale cuttings.
  • GB 2466862 A describes in situ measurements of wellbore and formation parameters
  • the main object of the invention is to provide a system and a method for early determination of instabilities and changes in its structural integrity which can have serious consequences, such as fracturing or collapse of the wellbore.
  • a further object of the invention is to provide reliable instrumentation that can be permanently installed in the wellbore without requiring any maintenance.
  • a further object of the present invention is to solve the problems related to prior art described above and therefore to disclose a stress meter taking account of the effective stresses of the formations close to a wellbore.
  • a further object of the present invention is to solve the problems related specifically wellbores with a casing string cemented in place, where changes in stresses outside the casing not directly influences the drilling operation initially.
  • the invention is a wellbore stress meter system comprising;
  • a first load cell a first pressure sensor with a pressure output signal
  • a wireless communication system comprising an external device and an internal device, a cable, and a surface device, wherein
  • said first load cell, said first pressure sensor and said external device are configured to be arranged outside said wellbore conduit, and said internal device and said cable are configured to be arranged inside said wellbore conduit, wherein said first load cell comprises;
  • first interface element arranged in a first end of said first load cell with fluidly separated first and second surfaces, wherein said first surface is in fluid communication with said first fluid, and said first interface element is further configured to move relative said cell element as a function of a first force applied on said first surface relative a second end opposite said first end, and to compress said first fluid acting on said second pressure sensor, wherein said wellbore stress meter system is arranged to transfer said stress output signal and said pressure output signal, to said surface device via said wireless communication system and said cable.
  • the invention is also a method for determining a wellbore formation instability, comprising the steps of;
  • FIG. 1 illustrates in a section view an embodiment of a wellbore stress meter system (9) according to an embodiment of the invention arranged in a wellbore.
  • FIG. 2 illustrates a more detailed section view of the load cell (10) in Fig. 1.
  • FIG. 3 illustrates a triple acting load cell (10) with a sleeve (40) acting on the load cell according to an embodiment of the invention.
  • FIG. 4 illustrates in a combined sectional view and block diagram, a double acting load cell (10) with separate sensors and an external device (110) for wireless
  • FIG. 5 is a sectional view of a double acting load cell (10) covered by a sleeve (40), where the sleeve is shown transparent and without details regarding how the sleeve acts on the load cell. It also illustrates a wireless communication system (100) according to an embodiment of the invention.
  • Fig. 6 is a sectional view of wellbore stress meter system (9) with two or more perpendicular load cells (10) It also shows a wireless communication system (100) according to an embodiment of the invention.
  • FIG. 1 illustrates in an embodiment the invention, where a casing or tubing string (2) is installed in a wellbore (100).
  • a first load cell (10) and a first pressure sensor (20) are arranged outside the casing (2).
  • Figure 2 shows these elements in an enlarged drawing.
  • the first load cell (10) comprises a second pressure sensor (11) with a stress output signal (l is), a cell element (12) comprising a first fluid (12f) with a first fluid pressure (12p).
  • the first fluid (12f) cannot be seen directly in the figure. However, according to the invention, the space inside the cell element (12) is filled up with this fluid.
  • the first load cell (10) comprises a first interface element (13) arranged in a first end (10a) of the first load cell (10) with fluidly separated first and second surfaces (13a, 13b,), where the first surface (13a) is in fluid communication with the first fluid (12f), and the first interface element (13) is further configured to move relative the cell element (12) as a function of a first force (Fl) applied on the first surface (13a) relative the second end (10b).
  • the first interface element (13) is a piston arranged to move in a longitudinal direction relative the load cell (10), so that a positive force (Fl) will push the first interface element (13) into the cell element (12).
  • the wellbore stress meter system (9) further comprises a first pressure sensor (20) with a pressure output signal (20s) as illustrated in the lower end of the load cell (10).
  • the first load cell (10) and the first pressure sensor (20) have to be arranged outside the casing (2) where the measurements are taking place.
  • the wellbore stress meter system (9) comprises a wireless communication system (100) comprising an external device (110) and an internal device (120). It also comprises a cable (130) and a surface device (70).
  • the external device (110) is configured for being arranged outside the casing (2) in vicinity of the load cell (10) and the first pressure sensor (20) and transmit the stress output signal (l is) and the pressure output signal (20s) to the internal device (120) that further communicates with the surface device (70) over the cable (130).
  • the cable (130) is arranged to run inside the wellbore conduit (2).
  • the cable and the internal device (120) runs along a wireline inside the wellbore conduit (2).
  • the load cell (10) and the external device (120) may also be displaced relative the internal device (110) on the tubing or wireline, the wireless link will operate within a certain range of displacement.
  • the wireless communication is established by inductive fields, and the external and internal devices (110, 120) comprises inductive elements such as coils to establish a magnetic field between the devices.
  • the external device (110) comprises a first E-field antenna (11), and the internal device (120) comprises a second E-field antenna (21), wherein the first antenna, and the second antenna are arranged for transferring a signal between a first connector of the first E-field antenna and a second connector of the second E-field antenna by radio waves (Ec).
  • the first and second E-field antennas comprises dipole antennas or a first toroidal inductor antennas.
  • the E-field transmission allows less stringent alignment of the first and second antennas, which can reduce the time and cost needed for completion of the wellbore, and allow operation over a wider range of displacement between the external and internal devices (110, 120) due to displacement as described above.
  • the wellbore conduit (2) has in an embodiment a relative magnetic permeability less than 1,05 in a region between the and external and internal devices (110, 120).
  • the cell element (12), i.e., the main part of the load cell (10) is configured for being fixed to the wellbore conduit (2). In this configuration the load cell will detect stresses relative to the conduit (2).
  • the wellbore stress meter system (9) comprises a focal stress receptacle (40) configured for being arranged in the
  • the focal stress receptacle (40) is configured to act on the second surface (13b) of the first interface element (13) with the first force (Fl) when the focal stress receptacle (40) is subject to a second force (F2) from surrounding masses in the investigation interval.
  • the focal stress receptacle (40) is a sleeve about the conduit (2) that can move in the longitudinal direction of the conduit (2). However, it is fixed to the local masses surrounding it, and any changes in the surrounding masses relative the conduit will move the receptacle up or down.
  • the receptacle (40) is forced down by the second force (F2), it will push down the first interface element (13), and a change in stress will be detected.
  • a triple acting load cell with three interface elements (13, 130, 230). Two of the interface elements are arranged opposite each other. In this way stress changes are detected both when the receptacle (40) moves up and down.
  • the third interface element (230) is arranged perpendicular to the other interface elements and will detect stress changes in a first lateral direction.
  • an additional interface element is are arranged opposite the third interface element (230) to detect stresses opposite the first lateral direction.
  • Such additional interface element could e.g. be arranged outside the other side of the wellbore conduit (2) and in fluid connection with the cell element (12).
  • one or two further additional interface elements are arranged perpendicular to the first and third interface elements (13, 230) to detect transversal stresses perpendicular to the first lateral direction.
  • Casing strings are often cemented in place in the weiibore.
  • the focal stress receptacle (40) is also arranged to be cemented in place outside the weiibore conduit (2).
  • the first interface element (13) is a bellows or a diaphragm.
  • bellows may be arranged on the first end (10a) of the load cell (10).
  • the bellows and the first fluid (12f) will be compressed under the first force (Fl), and the second pressure sensor (11) will transform the first pressure (12p) to a stress output signal (l is).
  • the second pressure sensor (11) is a quartz pressure sensor. With a quartz pressure sensor, good long-term stability and accuracy is obtained, which is advantageous when determination of instability over long periods of time, such as the entire lifetime of the weiibore.
  • the measurements will suffer from thermic noise.
  • the root source of the thermic noise is usually rapid changes in the temperature of the fluids inside the weiibore conduit (2).
  • the load cell (10) may experience a force that is due to differences in thermal expansion of the cement and the steel of the load cell, which is not caused by a change in stress of the surrounding formation, but rather caused by temperature changes. Similar thermal noise may be induced on the interface between the steel of the load cell and the fluid inside the load cell.
  • the invention comprises in an embodiment a temperature sensor.
  • the temperature sensor may be integrated with the first pressure sensor (20) in the form of a quartz pressure and temperature transducer.
  • the stress output signal (l is) may therefore in an embodiment be corrected based on a pre-determined relation between a temperature measured by the
  • the relation can be pre-determined as a static function when the volume of the fluid in the load cell can be regarded as constant, and the load cell is buried in the surrounding cement.
  • This function may therefore be pre-determined by arranging the load cell inside a block of cement, varying the temperature, and recording a variation in the stress output signal (l is) as a function of the applied temperature variation around an operational temperature before the load cell is arranged in the wellbore.
  • the stress output signal (l is) may be corrected based on the super position principle, i.e. subtracting the temperature induced contribution at a given temperature.
  • the pressure output signal (20s) is corrected based on the same principle as above, i.e. characterisation and super position principle.
  • the load cell (10) may be double acting or triple acting as illustrated in Fig. 3 and 4.
  • the first load cell (10) comprises a second interface element (130) arranged in the second end (10b) of the first load cell (10) with fluidly separated first and second surfaces (130a, 130b,) wherein the first surface (130a) is in fluid communication with the first fluid (12f), and the second interface element (130) is further configured to move relative the cell element (12) as a function of the first force (Fl).
  • the third interface element (230) is configured to move relative the cell element (12) as a function of a third force (F3).H
  • the double acting load cell in Fig.4 shows that the first fluid (12f) is compressed and acting on the second pressure sensor (11) independently of the direction of the first force (Fl).
  • the value of the stress output signal (l is) will be the same whether the first interface element (13) or the second interface element (130), or alternatively the third interface element (230) is pushed into the cell element (12), since the pressure detected by the sensor (11) will be the same.
  • the focal stress receptacle (40) is configured to move transversally relative the wellbore conduit (2) and act on a second surface (230b) of the third interface element (230) with the third force (F3) when the focal stress receptacle (40) is subject to a corresponding transversal force from surrounding masses in the investigation interval.
  • the wellbore stress meter system (9) comprises a pressure sensor housing (80), comprising the first pressure sensor (20) with the output pressure signal (20s), a first oil filled chamber (81), a pressure transfer means (82) between the first oil filled chamber (81) arranged to isolate the first pressure sensor (20) from the oil filled chamber (81), and a pressure permeable filter port (83) through a wall of the housing (80), wherein the pressure permeable filter port (83) is in hydrostatic
  • the proposed pore pressure sensor described here allows in-situ determination of a pore pressure without having to establish a fluid connection between the pressure gauge and the formation by perforating the cement according to prior art.
  • the first pressure sensor (20) is isolated from the fluid and little exposed to clogging.
  • the pressure sensor housing (80) is integrated with the first load cell (10) as illustrated in Fig. 1, 2 and 3.
  • the first load cell (10) as illustrated in Fig. 1, 2 and 3.
  • one single transducer with two quartz elements can be used to measure both stress and pore pressure in the surrounding formation.
  • the wellbore stress meter system (9) comprises a signal processing unit (30) configured for being arranged in the investigation interval, receiving the stress output signal (l is) and pressure output signal (20s), and sending the stress output signal (l is) and pressure output signal (20s) to a communication port (38) on the signal processing unit (30).
  • the signal processing unit (30) may also be integrated in the transducer as illustrated in Fig. 1, 2 and 3.
  • the signal processing unit (30) as shown, is arranged for modulating the stress output signal (l is) and the pressure output signal (20s) onto a common carrier signal on the communication port (38).
  • the wellbore stress meter system (9) is configured to transfer power from the surface device (70) to the internal device (120), the internal device (120) configured for generating a varying electromagnetic field from the power, and the external device (110) is configured to provide power to the signal processing unit (30) by power harvesting the varying electromagnetic field.
  • the external device may comprise a separate power unit responsible for power harvesting and power control to the components of the system, such as the pressure sensors (11, 20) and the signal processing unit (30).
  • the wellbore stress meter system (9) comprises in an embodiment a second load cell (200) arranged perpendicular to the first load cell (10) as illustrated in Fig. 6, arranged to detect a third force (F3) acting on the second load cell (200), wherein the third force (F3) is perpendicular to the first force (Fl).
  • This second load cell (200) will measure stresses perpendicular to the first load cell (10).
  • a second stress output signal (211s) from the second load cell (200) is connected to the signal processing unit (30), and the signal processing unit (30) is configured for receiving the second stress output signal (211s) and sending the second stress output signal (211s) to the communication port (38) on the signal processing unit (30), in a similar way as for the first stress output signal (l is) for the first load cell (10).
  • the surface processing device (70) is configured for
  • First values (30) are illustrated in Fig. 1 as a database, but they can be stored in any suitable format. New values will be read continuously and compared to the stored values. The new values will in an embodiment also be stored, and historic data will be available for the stability of the wellbore formation in the investigation interval.
  • the surface processing device (70) is configured to raise an alarm when a predefined value has been reached for the new value with respect to the stored values.
  • the wellbore stress meter system (9) comprises in an embodiment an additional third load cell arranged perpendicular to both the first and second load cells (10, 200). This has not been show in the drawings. In this configuration the wellbore stress meter system (9) will detect stresses in three individually perpendicular directions.
  • transducers with different number of load cells and a single pore pressure sensor may be manufactured according to the invention, where one example is given in Fig. 6 for two load cells.
  • second and third load cells (200, 300) may also be double acting as described for the first load cell (10).
  • the double acting load cell (10) comprises a third pressure sensor (15) with a second stress output signal (15s), a second cell element (16) comprising a second fluid (16f) with a second fluid pressure (16p) as illustrated in Fig. 4.
  • the second cell element (16) is isolated from the first cell element (12), and the each of the fluids elements (12f, 16f) are acting on a dedicated sensor with a sensor signal that is sent to the signal processing unit (30).
  • the load cell (10) is fixed to the wellbore conduit (2), this will give an indication of the direction of the force acting on the load cell.
  • the double sensor load cells may be used in
  • First values (30) are illustrated in Fig. 1 as a database, but they can be stored in any suitable format. New values will be read continuously and compared to the stored values. The new values will in an embodiment also be stored, and historic data will be available for the stability of the wellbore formation in the investigation interval.
  • the method comprises raising an alarm when a predefined value has been reached for the new value with respect to the stored values.
  • the method comprises the step of providing power from the surface device (70) via cable (8) downhole inside the wellbore conduit (2) and further via wireless transmission through the wall of the wellbore conduit to the first and second pressure sensors (20, 1 1) .
  • the detection of the changes in the stability of the wellbore can be a relative measure, and it is not necessarily an object to obtain correct values from the stress or the pore pressure measurements.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un système de mesure de contrainte de puits de forage et un procédé de détermination d'instabilité de formation de puits de forage, comprenant une première cellule de charge (10), un premier capteur de pression (20) avec un signal de sortie de pression (20s), un système de communication sans fil (100), un câble (8), et un dispositif de surface (70), ladite première cellule de charge (10) comprend : - un deuxième capteur de pression (11) avec un signal de sortie de contrainte (11s), - un élément de cellule (12) contenant un fluide (12f), - un premier élément d'interface (13) dans une première extrémité (10a) de ladite première cellule de charge (10) avec des première et deuxième surfaces séparées fluidiquement (13a, 13b) où ladite première surface (13a) est en communication fluidique avec ledit fluide (12f), et ledit premier élément d'interface (13) se déplace par rapport audit élément de cellule (12) en fonction d'une force (F1) appliquée à ladite première surface (13a), et comprime ledit fluide (12f) agissant sur ledit deuxième capteur de pression (11).
PCT/NO2015/050223 2015-03-27 2015-11-26 Système de mesure de contraintes de trou de forage et procédé de détermination d'instabilité de formation de puits de forage WO2016159776A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO20150384 2015-03-27
NO20150384A NO343542B1 (en) 2015-03-27 2015-03-27 Borehole stress meter system and method for determining wellbore formation instability
US14/671,047 2015-03-27
US14/671,047 US10053980B2 (en) 2015-03-27 2015-03-27 Borehole stress meter system and method for determining wellbore formation instability

Publications (1)

Publication Number Publication Date
WO2016159776A1 true WO2016159776A1 (fr) 2016-10-06

Family

ID=55073080

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/NO2015/050223 WO2016159776A1 (fr) 2015-03-27 2015-11-26 Système de mesure de contraintes de trou de forage et procédé de détermination d'instabilité de formation de puits de forage
PCT/IB2016/051702 WO2016157051A1 (fr) 2015-03-27 2016-03-24 Système de mesure de contraintes de trou de forage et procédé pour déterminer l'instabilité de formation de puits de forage

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/051702 WO2016157051A1 (fr) 2015-03-27 2016-03-24 Système de mesure de contraintes de trou de forage et procédé pour déterminer l'instabilité de formation de puits de forage

Country Status (1)

Country Link
WO (2) WO2016159776A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110333265B (zh) * 2019-07-11 2020-11-06 中国中车股份有限公司 一种预测机车发动机排气波纹管剩余寿命的方法及系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285692A (en) 1990-08-31 1994-02-15 Exxon Production Research Company Methods for measuring physical parameters of a low permeability rock formation in situ
US6102122A (en) * 1997-06-11 2000-08-15 Shell Oil Company Control of heat injection based on temperature and in-situ stress measurement
WO2000049268A1 (fr) * 1999-02-19 2000-08-24 Dresser Industries, Inc. Capteurs montes sur tubage
US6138752A (en) * 1997-06-11 2000-10-31 Shell Oil Company Method and apparatus to determine subterrranean formation stress
WO2010037729A1 (fr) * 2008-10-01 2010-04-08 Shell Internationale Research Maatschappij B.V. Procédé et système pour la production d'un fluide hydrocarboné par un puits avec un ensemble capteur à l'extérieur du tubage de puits
GB2466862A (en) 2009-01-12 2010-07-14 Sensor Developments As Communicating through a casing pipe to a sensor using inductance
GB2475911A (en) * 2009-12-04 2011-06-08 Sensor Developments As Quartz crystal pressure and temperature sensor with dynamic temperature correction
US20120173216A1 (en) 2011-01-04 2012-07-05 Randy Koepsell Determining differential stress based on formation curvature and mechanical units using borehol logs
US20150007976A1 (en) * 2013-07-08 2015-01-08 Sensor Developments As Method and apparatus for permanent measurement of wellbore formation pressure from an in-situ cemented location

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285692A (en) 1990-08-31 1994-02-15 Exxon Production Research Company Methods for measuring physical parameters of a low permeability rock formation in situ
US6102122A (en) * 1997-06-11 2000-08-15 Shell Oil Company Control of heat injection based on temperature and in-situ stress measurement
US6138752A (en) * 1997-06-11 2000-10-31 Shell Oil Company Method and apparatus to determine subterrranean formation stress
WO2000049268A1 (fr) * 1999-02-19 2000-08-24 Dresser Industries, Inc. Capteurs montes sur tubage
WO2010037729A1 (fr) * 2008-10-01 2010-04-08 Shell Internationale Research Maatschappij B.V. Procédé et système pour la production d'un fluide hydrocarboné par un puits avec un ensemble capteur à l'extérieur du tubage de puits
GB2466862A (en) 2009-01-12 2010-07-14 Sensor Developments As Communicating through a casing pipe to a sensor using inductance
GB2475911A (en) * 2009-12-04 2011-06-08 Sensor Developments As Quartz crystal pressure and temperature sensor with dynamic temperature correction
US20120173216A1 (en) 2011-01-04 2012-07-05 Randy Koepsell Determining differential stress based on formation curvature and mechanical units using borehol logs
US20150007976A1 (en) * 2013-07-08 2015-01-08 Sensor Developments As Method and apparatus for permanent measurement of wellbore formation pressure from an in-situ cemented location

Also Published As

Publication number Publication date
WO2016157051A1 (fr) 2016-10-06

Similar Documents

Publication Publication Date Title
US10113410B2 (en) Systems and methods for wirelessly monitoring well integrity
AU2006311880B2 (en) Monitoring formation properties
US9677396B2 (en) Method and apparatus for permanent measurement of wellbore formation pressure from an in-situ cemented location
US20040160858A1 (en) Method and apparatus for determining downhole pressures during a drilling operation
US9631489B2 (en) Systems and methods for measuring parameters of a formation
US10400578B2 (en) Method for permanent measurement of wellbore formation pressure from an in-situ cemented location
EP2766569B1 (fr) Système de détection de pression de formation géologique
US10267144B2 (en) Downhole sensor system
US3898877A (en) Method and apparatus for measuring pressure related parameters
US10053980B2 (en) Borehole stress meter system and method for determining wellbore formation instability
GB2584976A (en) Method and apparatus for permanent measurement of wellbore formation pressure from an in-situ cemented location
WO2016159776A1 (fr) Système de mesure de contraintes de trou de forage et procédé de détermination d'instabilité de formation de puits de forage
US3580334A (en) Method for preventing deformation in a well casing
NO343542B1 (en) Borehole stress meter system and method for determining wellbore formation instability
Enyekwe et al. Comparative analysis of permanent downhole gauges and their applications
Castillo et al. Reservoir geomechanics applied to drilling and completion programs in challenging formations: Northwest Shelf, Timor Sea, North Sea and Colombia
CN210714682U (zh) 基于随钻钻井的地层压力测试装置
Neels et al. Fluid pressure monitoring in deep cement grouted boreholes
WO2024097334A1 (fr) Mesures de débit au moyen de capteurs de température
NO20150041A1 (en) Method and apparatus for permanent measurement of wellbore formation pressure from an in-situ cemented location
Denney 4D-Pressure Pilot Determines Well Spacing in Tight Gas
NZ623721B2 (en) Formation pressure sensing system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15820897

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15820897

Country of ref document: EP

Kind code of ref document: A1