WO2009155268A2 - Système d'identification positive de carotte de paroi latérale de trou de forage - Google Patents

Système d'identification positive de carotte de paroi latérale de trou de forage Download PDF

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Publication number
WO2009155268A2
WO2009155268A2 PCT/US2009/047466 US2009047466W WO2009155268A2 WO 2009155268 A2 WO2009155268 A2 WO 2009155268A2 US 2009047466 W US2009047466 W US 2009047466W WO 2009155268 A2 WO2009155268 A2 WO 2009155268A2
Authority
WO
WIPO (PCT)
Prior art keywords
core
fluid
receiver
core sample
bore
Prior art date
Application number
PCT/US2009/047466
Other languages
English (en)
Other versions
WO2009155268A3 (fr
Inventor
Royce Blaschke
Ahmad Latifzai
Edward C. Boratko
Original Assignee
Schlumberger Canada Limited
Schlumberger Technology B.V
Prad Research And Development Limited
Services Petroliers Schlumberger
Schlumberger Holdings Limited
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
Application filed by Schlumberger Canada Limited, Schlumberger Technology B.V, Prad Research And Development Limited, Services Petroliers Schlumberger, Schlumberger Holdings Limited filed Critical Schlumberger Canada Limited
Publication of WO2009155268A2 publication Critical patent/WO2009155268A2/fr
Publication of WO2009155268A3 publication Critical patent/WO2009155268A3/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
    • E21B49/02—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 by mechanically taking samples of the soil
    • E21B49/06—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 by mechanically taking samples of the soil using side-wall drilling tools pressing or scrapers
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells

Definitions

  • Wells are generally drilled into the ground to recover natural deposits of hydrocarbons and other desirable materials trapped in geological formations in the Earth's crust.
  • a wellbore is drilled into the ground and directed to the targeted geological location from a drilling rig at the Earth's surface.
  • each sample is cored from the formation using a hollow coring bit, and the sample obtained is generally referred to as a core sample.
  • the core sample Once the core sample has been transported to the surface, it may be analyzed to assess reservoir characteristics such as the reservoir storage capacity (porosity) and the flow potential (permeability) of the formation matrix; the chemical and mineral composition of the fluids and mineral deposits contained in the pores of the formation; and the irreducible water content of the formation material.
  • the information obtained from analysis of a sample is used to design and implement well completion and production.
  • sidewall coring a core sample is taken from the side wall of the drilled borehole. Side wall coring is also performed after the drillstring has been removed from the borehole. A wireline coring tool that includes a coring bit maybe lowered into the borehole, and a small core sample is taken from the sidewall of the borehole. Multiple core samples may be taken at different depths in the borehole.
  • a core sample storing device of a downhole coring tool in accordance with one or more aspects of the present disclosure includes a sleeve forming a bore between a first open end and a second end; a valve assembly positioned at the second end of the sleeve; a fluid disposed in the bore; and a piston disposed in the bore between the first open end and the fluid.
  • a downhole coring system includes a coring tool having an actuation system and a core sample receiver, the actuation system operable to obtain a sidewall core sample and to dispose the obtained core sample into the core sample receiver; a valve assembly connected with the core sample receiver, the valve assembly comprising a check valve operable in response to disposing the core sample in the core sample receiver; and a surface unit in communication with the coring tool, the surface unit adapted to monitor operating conditions of the actuation system.
  • a method for obtaining core samples from a formation penetrated by a wellbore includes disposing a coring tool into the wellbore, the coring tool comprising a core receiver; obtaining a core sample from the formation; disposing the core sample into the core receiver; releasing a fluid from the core receiver in response to disposing the core sample in the core receiver; retrieving the core receiver from the wellbore; and removing the core sample from the core receiver.
  • Figure 1 is a schematic view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 2 is a cut-away view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 3 is a cut-away view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 4 is a sectional view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 5 is an expanded schematic view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 6 is a sectional view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 7 is a sectional view of an apparatus according to one or more aspects of the present disclosure.
  • Figure 8 is a graphical display demonstrating one or more aspects of the present disclosure.
  • first and second features are formed in direct contact
  • additional features may be formed interposing the first and second features, such that the first and second features may not be in direct contact.
  • FIG. 1 is a wellbore schematic illustrating a coring tool 10 in accordance with one or more aspects of the present disclosure, coring tool 10 being disposed in a wellbore 11 identified by sidewall 12.
  • tool 10 is disposed in wellbore 11 on a conveyance 14.
  • Conveyance 14 may comprise electrically conducting cables and may be referred to as a wireline.
  • Coring tool 10 may be secured in the wellbore for example by support arms 15.
  • a core sample is obtained from the formation 16 by a coring bit 18 that is extended from tool 10. The core sample is then withdrawn from formation 16 and disposed within a core receiver 20.
  • Tool 10 includes an actuation system generally denoted by the numeral 22.
  • Actuation system 22 may include one or more hydraulically actuated devices such as motors and linear actuators; a hydraulic circuit; kinematic pistons, hydraulic pumps, and valves; and electric motors.
  • actuation system is disclosed in U.S. Patent No. 7,303,011, which is incorporated herein for all of its teachings.
  • Core receiver 20 is illustrated in Figure 1 as being disposed within an outer housing of tool 10 for purposes of illustration. Core receiver 20 may be disposed wholly or partially within the body of tool 10. Core receiver 20 may be connected, for example by threading, to a main tool body portion.
  • Core receiver 20 includes an upper end 20a for disposing the core sample and a lower end 20b. Lower end 20b may be in selective fluid communication with wellbore 11, for example to discharge a fluid from receiver 20. The fluid communication may be direct or via a conduit through tool 10.
  • Tool 10 is operationally connected to a surface unit 24 which may include, without limitation, a control panel 26 and a monitor 28.
  • Surface unit 24 may be adapted to provide electrical power and/or hydraulic power to tool 10.
  • Surface unit 24 may include a processing unit, electronic storage and the like for communicating with tool 10.
  • operating characteristics may be provided, for example via monitor 28, regarding the operation of tool 10.
  • actuation system 22 is connected to surface unit 24 and monitor 28 such that operations may be monitored.
  • surface unit 24 and monitor 28 may provide information regarding operation of the electrical and hydraulic systems including hydraulic pressures. Further, operation of actuation system 22 may be controlled via surface unit 24.
  • FIG. 2 and 3 illustrate a portion of coring tool 10 utilized for collecting core sample 30.
  • Depicted rotary coring bit 18 includes a formation cutting element 32 disposed at a distal end of bit 18.
  • “Distal end” refers to the end of coring bit 18 that is the farthest away from the center of the tool body.
  • Bit 18 is coupled to and driven by a hydraulic motor 34 which is included in actuation system 22.
  • Core sample 30 may be retracted from reservoir 16 via hydraulic actuator 36. Hydraulic actuator 36 may be retracted so that motor 34 pulls rotary coring bit 18 into a tilted position. Tilting may break core sample 30 from formation 16.
  • coring bit 18 and core sample 30 are retrieved into coring tool 10 through retraction of the coring shaft or mechanical linkage that is used to deploy coring bit 18 and to rotate the coring bit against the formation. Once coring bit 18 and core sample 30 have been retracted to within coring tool 10, the retrieved core sample 30 is ejected from coring bit 18 into a storage chamber, described as core receiver 20 herein.
  • Figure 3 illustrates core sample 30 retracted into the body 38 (e.g., housing) of tool 10 and ejected from coring bit 18 by a core pusher 40.
  • Core pusher 40 pushes core sample 30 out of coring bit 18 and into core receiver 20.
  • Core pusher 40 is included in actuation system 22 and may include a hydraulic actuator generally denoted by the numeral 42.
  • a marker 44 may be used to separate core sample 30 from a previously obtained core sample 30a and any later obtained samples stored in core receiver 20.
  • actuation system 22 includes one or more of hydraulic actuator 42 and core pusher 40 and is in connection with surface unit.
  • monitoring of hydraulic pressure of actuation system 22 when disposing core sample 30 into receiver 20 may provide positive identification of the capture and storage of core sample 30 in core receiver 20.
  • FIG. 4 illustrates a sectional view of core receiver 20 in accordance with one or more aspects of the present disclosure.
  • Core receiver 20 includes a tubular sleeve 46 having a longitudinal bore 48, a floating piston 50, and a valve assembly 52.
  • Core receiver 20 is connectable to a priming hydraulic system generally denoted by the numeral 54.
  • Priming hydraulic system 54 may include a hydraulic pump, fluid reservoir and the like for preparing core receiver 20 for receiving core samples as further described herein.
  • Core receiver 20 may be separated from tool 10 when being primed, or prepared, for utilization in a coring operation. Once core receiver 20 is primed, for example as shown in Figure 6, it is connected with tool 10 and disposed in the wellbore.
  • Priming hydraulic system 54 may be separate from the main hydraulic system included for example in actuation system 22.
  • the tubular sleeve 46 portion of core receiver 20 is adapted for storing core samples therein.
  • Core receiver 20 may be provided by retrofitting core sample storage chambers by adding valve assembly 52 and floating piston 50.
  • Valve assembly 52 is connected with the bottom end 46a of tubular sleeve 46 that is distal from top end 20a.
  • Valve assembly 52 also described with reference to Figure 5, includes a passage 54 formed through a body 56 between bore 48 and the open bottom end 20b of core tool 10.
  • the bottom end 58 of body 56 forms a cavity 60 at which the end of passage 54 terminates.
  • the embodiment of Figures 4 and 5 illustrate a cap 62 which may be connected at bottom end 58 to protect elements of core receiver 20. Cap 62 is removed for operation of core receiver 20 as illustrated in Figures 6 and 7.
  • Passage 54 includes a check valve 64 that selectively permits flow of fluid from bore 48 through passage 54 and expelled through at bottom end 58 of body 56 and bottom end 20b of the coring tool.
  • Check valve 64 may be a differential check valve providing a selected pressure differential for opening to release the fluid.
  • Valve assembly 52 includes a fill port 66 including a blocking device 68, in connection with passage 54.
  • Blocking device 68 may be a valve, plug or similar device for closing port 66.
  • Valve assembly 52 also includes an isolation valve 70 in connection with passage 54 through a port 72.
  • Isolation valve 70 is provided and positioned to selectively block fluid and pressure communication to check valve 64 from bore 48 and fill port 66 through passage 54.
  • Isolation valve 70 may comprise various types of valves including gate valves, needle valves, ball valves and the like. In the depicted embodiment, isolation valve 70 is a manually operated valve.
  • a step of priming core receiver 20 for coring operations is now described with reference to Figures 4 and 5. As previously noted, this step may be performed with core receiver separated from coring tool 10.
  • Floating piston 50 is disposed in bore 48 of sleeve 46.
  • Isolation valve 70 may be actuated to the closed position blocking passage 54 between check valve 64 and fill port 66 and bore 48.
  • Pressurized fluid 74 e.g., hydraulic fluid
  • core receiver 20 is primed by moving floating piston 50 proximate to top end 20a of sleeve 46 by pumping hydraulic fluid 74 into bore 48.
  • Core receiver 20 is illustrated in the primed position in Figure 6.
  • floating piston 50 In the primed position, floating piston 50 is positioned proximate to end 20a. Hydraulic system 54 is disconnected from fill port 66 and blocking device 68 is positioned to block flow through fill port 66. Core receiver 20 may then be connected within tool 10 as illustrated generally in Figures 1-3.
  • cap 62 In the primed position, cap 62 is removed and isolation valve 70 is actuated to the open position providing communication between bore 48 and check valve 64.
  • a method of operating tool 10 in accordance to an embodiment of the invention is now described with reference in particular to Figures 1-3, 7 and 8.
  • the primed core receiver 20 is positioned with tool 10 into wellbore 11.
  • Core sample 30 is obtained from formation 16 ( Figure 3) and retracted for positioning in core receiver 20 ( Figures 4 and 7).
  • the first core sample 30 retrieved is placed on top of floating piston 50.
  • Actuation system 22 is activated, operating push rod 40 to urge core sample 30 against floating piston 50 so as to dispose core sample 30 within sleeve 46 of core receiver 20.
  • Push rod 40 and actuation system 22 must overcome the differential pressure at check valve 64 for core sample 30 to be disposed in core receiver 20.
  • check valve 64 may be set at a differential pressure of 80 psi.
  • Actuation system 22 applies a force through push rod 40, core sample 30, and floating piston 50 against hydraulic fluid 74 which opens check valve 64 upon achieving the selected differential pressure (e.g., 80 psi in this example). With check valve 64 open a volume of hydraulic fluid 74 substantially equivalent to the volume of core sample 30 will be discharged through check valve 64.
  • Push rod 40 returns to is initial position after the core sample is completely installed into receiver 20.
  • a marker 44 may be positioned atop core sample 30 as desired.
  • Positive identifying information regarding core sample 30 may be obtained via tool 10.
  • Operating information regarding tool 10 may be monitored and displayed at surface unit 24 and display monitor 28.
  • An example of an operating display utilized in coring operations according to one or more aspects of the present disclosure is provided in Figure 8.
  • Data 76 includes operating information related to actuation system 22.
  • the displayed data 76 is indicative of a core sample retrieval process utilizing a check valve having a differential pressure set at 80 psi for purposes of description.
  • a pressure spike 78 is indicated in data 76 associated with the resistance of core receiver 20 and check valve 64.
  • pressure spike 78 occurs in the pressure of a hydraulic pump of actuation system 22.
  • This identifying pressure spike 78 and the associated elapsed time 80 can provide identifying information regarding the retrieved core sample 30.
  • a full length core sample 30 may require a time of six seconds to be disposed within core receiver 20.
  • the elapsed time 80 of the core receiver associated pressure spike 78 identified in Figure 8 is indicative of the volume of the core sample. For example, if a particular tool 10 has a six-second stroke for obtaining a full length core sample, then a core receiver associated pressure spike 78 of six-seconds identifies that a full length core sample has been obtained and disposed in receiver 20. Similarly, a three-second pressure spike 78 would indicate a half of a full length core sample has been disposed in core receiver 20 and so on. [0036] Upon completion of the downhole portion of core sampling operation, tool 10 is retrieved from the wellbore.
  • core receiver 20 is removed from tool 10.
  • Isolation valve 70 is closed and hydraulic fluid 74 is pumped from hydraulic system 54 ( Figure 4) into fill port 66, through passage 54 and into bore 48.
  • Hydraulic fluid 74 urges piston 50 toward top end 20a and discharges the contained core samples out of sleeve 46.
  • the ability to remove each core sample 30 from an end of sleeve 46 provides a benefit in correctly identifying the retrieved core sample with the position it was obtained in the wellbore relative to some systems requiring separating of the core sample receiver along its length.
  • coring tool 10 to obtain information related to the volume of each core sample 30 saved in receiver 20 as it is disposed in receiver 20 downhole (e.g., in real time) provides greater accuracy in identifying the core sample at the surface. For example, when an unconsolidated core sample is retrieved at the surface, the additional information regarding the volume of the sample obtained and by pushing the core sample out of an end of receiver 20, facilitates greater accuracy in maintaining the unconsolidated material together in correctly identified samples.
  • a core sample storing device of a downhole coring tool comprises a sleeve forming a bore between a first open end and a second end; a valve assembly positioned at the second end of the sleeve; a fluid disposed in the bore; and a piston disposed in the bore between the first open end and the fluid.
  • the valve assembly may comprise a check valve having a defined operating pressure.
  • the check valve may provide flow of the fluid from the bore through the valve assembly in response to application of the defined operation pressure.
  • the valve assembly may comprise a body forming a passage between the bore and the exterior of the body; and a check valve in communication with the passage allowing flow of the fluid from the bore through the check valve.
  • the check valve may open in response to a selected pressure applied by the fluid.
  • the valve assembly may further comprise a port formed through the body and in communication with the passage.
  • the port may be positioned between the check valve and the bore.
  • the check valve may open in response to a selected pressure applied by the fluid.
  • the valve assembly may further comprise a valve in communication with the passage between the port and the check valve.
  • the valve may be actuated between a closed position blocking fluid flow through the passage and an open position.
  • a method of obtaining core samples from a formation penetrated by a wellbore comprises disposing a coring tool into the wellbore, the coring tool comprising a core receiver; obtaining a core sample from the formation; disposing the core sample into the core receiver; releasing a fluid from the core receiver in response to disposing the core sample in the core receiver; retrieving the core receiver from the wellbore; and removing the core sample from the core receiver.
  • Releasing the fluid may comprise applying a force in excess of a predetermined force to the fluid disposed in the receiver.
  • the force may be applied by disposing the core sample into the core receiver.
  • the fluid may be released through a check valve.
  • the method may further comprise measuring a pressure increase associated with disposing the core sample in the core receiver.
  • the pressure increase may be measured in an actuation system of the coring tool.
  • the method may further comprise measuring the elapsed time disposing the core sample into the core receiver.
  • Removing the core sample from the core receiver may comprise pushing the core sample out of an open end of the core receiver.
  • the pushing may comprise pumping a fluid into the core receiver.
  • the core receiver may comprise a sleeve forming a bore between a first open end and a second end; a valve assembly positioned at the second end of the sleeve; and a piston disposed in the bore between the first open end and the fluid.
  • the volume of fluid released may be substantially the same as the volume of the core sample disposed in the core receiver.
  • the method may further comprise measuring the elapsed time of the disposing the core sample into the core receiver. Removing the core sample from the core receiver may comprise pumping a fluid into the bore between the piston and the valve assembly.

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)
  • Soil Sciences (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

Dans un ou plusieurs de ses aspects, l'invention concerne un procédé permettant d'obtenir des carottes d'une formation traversée par un puits de forage, qui consiste à placer un outil de carottage dans le puits de forage, cet outil de carottage comprenant un récepteur de carotte, à obtenir une carotte de la formation; à placer cette carotte dans le récepteur de carotte; à libérer un fluide en provenance du récepteur de carotte en réaction au dépôt de la carotte dans le récepteur de carotte; et à extraire le récepteur de carotte du puits de forage et retirer la carotte du récepteur de carotte.
PCT/US2009/047466 2008-06-19 2009-06-16 Système d'identification positive de carotte de paroi latérale de trou de forage WO2009155268A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7380708P 2008-06-19 2008-06-19
US61/073,807 2008-06-19

Publications (2)

Publication Number Publication Date
WO2009155268A2 true WO2009155268A2 (fr) 2009-12-23
WO2009155268A3 WO2009155268A3 (fr) 2011-03-24

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PCT/US2009/047466 WO2009155268A2 (fr) 2008-06-19 2009-06-16 Système d'identification positive de carotte de paroi latérale de trou de forage

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8919460B2 (en) 2011-09-16 2014-12-30 Schlumberger Technology Corporation Large core sidewall coring
US9097102B2 (en) 2011-09-29 2015-08-04 Schlumberger Technology Corporation Downhole coring tools and methods of coring
CN109113615A (zh) * 2018-08-13 2019-01-01 四川大学 具有恒压功能的岩芯保真舱

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5617927A (en) * 1992-10-30 1997-04-08 Western Atlas International, Inc. Sidewall rotary coring tool
EP1154076A1 (fr) * 2000-05-10 2001-11-14 Eijkelkamp Agrisearch Equipment B.V. Dispositif de prélèvement d'échantillon de sol
EP1247936A1 (fr) * 2001-04-06 2002-10-09 Corpro Systems Limited Procede et appareil de carottage et de forage
GB2409219A (en) * 2003-12-18 2005-06-22 Schlumberger Holdings Sidewall coring tool with retention member
US20060081398A1 (en) * 2004-10-20 2006-04-20 Abbas Arian Apparatus and method for hard rock sidewall coring of a borehole

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5617927A (en) * 1992-10-30 1997-04-08 Western Atlas International, Inc. Sidewall rotary coring tool
EP1154076A1 (fr) * 2000-05-10 2001-11-14 Eijkelkamp Agrisearch Equipment B.V. Dispositif de prélèvement d'échantillon de sol
EP1247936A1 (fr) * 2001-04-06 2002-10-09 Corpro Systems Limited Procede et appareil de carottage et de forage
GB2409219A (en) * 2003-12-18 2005-06-22 Schlumberger Holdings Sidewall coring tool with retention member
US20060081398A1 (en) * 2004-10-20 2006-04-20 Abbas Arian Apparatus and method for hard rock sidewall coring of a borehole

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8919460B2 (en) 2011-09-16 2014-12-30 Schlumberger Technology Corporation Large core sidewall coring
US9097102B2 (en) 2011-09-29 2015-08-04 Schlumberger Technology Corporation Downhole coring tools and methods of coring
CN109113615A (zh) * 2018-08-13 2019-01-01 四川大学 具有恒压功能的岩芯保真舱
WO2020034358A1 (fr) * 2018-08-13 2020-02-20 四川大学 Compartiment de conservation de carotte ayant une fonction de pression constante

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