EP0095837A2 - Dispositif et procédé d'essai de puits - Google Patents

Dispositif et procédé d'essai de puits Download PDF

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Publication number
EP0095837A2
EP0095837A2 EP83302607A EP83302607A EP0095837A2 EP 0095837 A2 EP0095837 A2 EP 0095837A2 EP 83302607 A EP83302607 A EP 83302607A EP 83302607 A EP83302607 A EP 83302607A EP 0095837 A2 EP0095837 A2 EP 0095837A2
Authority
EP
European Patent Office
Prior art keywords
well
outlet ports
hollow member
fluid
bore
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP83302607A
Other languages
German (de)
English (en)
Other versions
EP0095837A3 (fr
Inventor
Andrew Patrick Hollis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Gas Corp
Original Assignee
British Gas Corp
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 GB08215323A external-priority patent/GB2121084B/en
Priority claimed from GB08222737A external-priority patent/GB2121085A/en
Application filed by British Gas Corp filed Critical British Gas Corp
Publication of EP0095837A2 publication Critical patent/EP0095837A2/fr
Publication of EP0095837A3 publication Critical patent/EP0095837A3/fr
Withdrawn legal-status Critical Current

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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
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • 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
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • 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
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated

Definitions

  • This invention relates to the testing of oil or gas exploration wells and to apparatus for use in such testing.
  • the DST is the production of the reservoir fluid under carefully controlled conditions to provide information on the possible future performance of a production well at the exploration site.
  • the column of the drill pipe is used as the temporary production tubing.
  • An inflatable packer run as part of the drill pipe column, provides sealing between the drill pipe and the side wall of the well which may be bare rock or steel casing.
  • the drill pipe must contain a fluid which is both of lower density than the mud and gives hydrostatic bead pressure which is less than the formation pressure.
  • the most useful data available from the DST are pressures relating to the flowing well, and most importantly, measurements of the build-up of reservoir pressure when the well is closed in and the reservoir is stabilising.
  • the latter data gives the most direct information on the permeability of the reservoir rock and the degree of damage to permeability in the immediate vicinity of the well.
  • the pressure measurements In order to provide a basis for sound interpretation the pressure measurements must be of great accuracy and the well must be able to be shut-in down bole to prevent production of fluids into the well bore or settling out of fluids after a surface shut in. The movement of fluids in the long vertical well bore after shut-in will cause a pressure transient that would obscure the reservoir effects that are of interest.
  • This system has the serious disadvantage of not providing the engineer with information as the test proceeds requiring the engineer to act blindly not knowing exactly what is happening down hole.
  • the gauge and shut-in assembly is run in as part of the drill pipe column and the wireline electrical connection is made after the gauge and valve assembly is in position. This has the following disadvantages:-
  • the present invention proposes well testing apparatus which seeks to avoid the disadvantages associated with both wireline apparatus and specially adapted pipe runs and a method, employing such apparatus, for testing wells.
  • a method for performing one or more designated tests upon a well in which the well fluid pressure is less than the associated reversoir pressure so that well fluid can flow up the well towards the surface comprising locating a hollow member, containing instruments for measuring and data aquisition from said tests, in the well bore in such a manner that the fluid flowing up the bore is caused to take a path which includes passage through at least a portion of the hollow member in which said fluid is in direct communication with said instruments and performing said designated tests while permitting such flow through said member to ocur or while preventing fluid escape from the member.
  • Apparatus for use in the method of testing of wells may be in the form of an assembly adapted to be received within the bore of a drill string and arranged to carry instruments for data acquisition, the assembly comprising a hollow member provided with longitudinally spaced inlet and outlet ports to allow passage of fluids from the well upwardly through the inlet ports into the lower end of the member and a closure device which is movable relative to the upper part of the member to close the outlet ports, means for actuating the device to close the outlet ports and means for sealing the annular space between the lower end of the member and the wall of the pipe run in the region between the inlet an outlet ports, said instruments being located within the member and being in direct communication with fluid in the region between the inlet and outlet ports.
  • the assembly located within the bore of a drill pipe 1 comprises a hollow member 2 and an internal closure device 3 which forms a sliding seal within the hollow member 2.
  • the device 3 comprises an uppermost cylindrical plug body portion 4 leading to a lowermost cylindrically hollow portion 5.
  • the hollow member 2 is provided with longitudinally spaced ports 6,7, which may be in the form of elongate slots in the wall thereof.
  • the lowermost ports 7 form inlets 8 for the well fluids while the uppermost ports 6 form outlets for the fluid.
  • the hollow member 2 is closed at its lowermost end 8 and its provided therein with instrument packages 9 for monitoring well fluids.
  • the instruments may comprise pressure measuring devices, thermometers and flow meters.
  • the closure device 3 is actuated by actuating means 10 (shown schematically) including a hydraulic/pneumatic, hydraulic or electromechanical driven ram 11 located within the hollow member 2 above the device 3 and secured thereto.
  • actuating means 10 shown schematically
  • the drive device for the piston may be remotely operated via a cable (not shown) from the surface.
  • Cables (not shown) from the instruments 9 run to the surface through a conduit (not shown) which is hermetically sealed.
  • the conduit may be disposed in a longitudinal recess in the inner or outer wall of the member 2 or it may extend upwardly through the bore of the member 2 through the closure device 3 and the ram 11 in a manner similar to that shown in Figure 2.
  • the ram 11 is actuated to move the closure device 3 downwardly under the action of a return spring 12 located above the device 3 and circumventing the ram 11. Movement of the device 3 downwards causes the hollow portion 5 thereof to cover the outlet ports 6 to seal off the lower part of the hollow member 2.
  • the closed position of the device 3 is shown in outline in Figure 1.
  • the ram 11 is moved upwardly under the action of the return spring 12 to move the closure device 3 back to its original position thereby uncovering and reopening the outlet ports 7.
  • the upward release of the closure device 3 occurs automatically.
  • an inflatable packer 13 is provided in the region between the ports 6 and 7.
  • the packer 13 may be inflated hydraulically by remote control from the surface.
  • the closure device 3 may comprise a form which is a variant of that shown in Figure 1.
  • the device 3 may merely comprise a hollow cylinder.
  • it may comprise a hollow cylinder which has a portion containing ports corresponding to those outlet ports 6 in the hollow member 2.
  • the outlet ports 6 are open when in one longitudinal position they are aligned with the ports in the cylinder whereas in another longitudinal position displaced from the first, the outlet ports 6 are closed by an integral wall portion of the cylindrical device.
  • the device may comprise a hollow cylinder with circumferentially spaced ports which, in one position, are alignable with the outlet ports 6 to open them. In another position to which the cylinder is moved by a limited angular rotation thereof the outlet ports 6 are closed by the wall of the cylinder.
  • the actuating means must be adapted to effect an axial angular rotation of the cylinder rather than a longitudinally directed sliding movement thereof.
  • the closure device 14 comprises an outer sleeve which is sealingly slidable over the hollow member 2. Upward movement of the sleeve 14 is limited by its engagement of a shoulder 15 on the hollow member 2 formed between a lower portion 16 and upper portion 17 of greater diameter than the lower portion.
  • a septum 18 divides the member 2 into upper and lower chambers 19 and 20 respectively, the lower chamber 20 including the ports 6 and 7.
  • the sleeve 14 is connected to the piston 21 of a ram 22 for moving the sleeve 14 slidably over the hollow inner member 2.
  • the piston 21 has radially directed portions 23 extending through elongate longitudinal slots in the wall of the hollow member 2, which portions are connected to the sleeve 14 to permit movement thereof by the piston 21 moving relative to the slots.
  • the ram 22 is actuated by fluid introduced under pressure into the upper part 24 of the chamber 19.
  • a fluid reservoir and fluid control valves (not shown) are provided in the upper part 24 of the chamber 19.
  • conduit 25 Extending from the surface through the hollow member 2 by way of a central bore in the ram 22, piston 21 and the septum 18 is a hermetically sealed conduit 25.
  • the conduit 25 carries cables (not shown) for remote control of the fluid reservoir and control valves and of the instruments 9.
  • the actuation may be achieved either hydraulic/pneumatically, hydraulically or electromechanically.
  • the DST tool in accordance with the invention may be run into the well bore by one of an alternative sequence of operations.
  • a conventional down hole shut in valve in the shut mode, may be run in as part of the drill string and, subsequently the DST tool is lowered into the hole down the hollow drill stem.
  • flow control is regulated by the valve assembly of the tool.
  • An alternative method of locating the tool is to run in a drill string and to run in an open ended drill string down the hole.
  • the column of mud in the drill stem is replaced with a less dense fluid such as sea water, diesel oil or nitrogen and thence the DST tool is sunk through the less dense fluid.
  • the fluid control is again regulated by the valve assembly of the tool.
  • testing tool in accordance with the invention has many technical advantages.
  • An example is the selective perforation of intervals between tests to evaluate the performance of short intervals of the reservoir thickness and their aggregate.
  • Down-hole flowmeters can be run to measure the flow from each group of perforations.
  • the present invention may be used with advantage for testing producing wells. Whilst this may not be so important for high rate oil and gas wells, in poorer wells particularly with two phase flow, redistribution of the well bore contents after shut-in and after-flow into a large capacity well can obscure valuable data.
  • nipple which is an integral part of the tubing string and must be run in when the well is completed.
  • existing wells which do not have a modified tubing string cannot be tested with the existing equipment.
  • no modifications to the production tubing are required for use of the present invention and it may be used on pre-existing wells.
  • the testing instruments are not usually run in with the drill string, there is little risk of damage, as would be in the case of known DST tools since they are subject to jarring as the drill string is run in.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Pipe Accessories (AREA)
  • Measuring Fluid Pressure (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP83302607A 1982-05-26 1983-05-09 Dispositif et procédé d'essai de puits Withdrawn EP0095837A3 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB08215323A GB2121084B (en) 1982-05-26 1982-05-26 Well testing apparatus
GB8215323 1982-05-26
GB8222737 1982-08-06
GB08222737A GB2121085A (en) 1982-05-26 1982-08-06 Well testing apparatus
GB08225850A GB2121086B (en) 1982-05-26 1982-09-10 Well testing method
GB8225850 1982-09-10

Publications (2)

Publication Number Publication Date
EP0095837A2 true EP0095837A2 (fr) 1983-12-07
EP0095837A3 EP0095837A3 (fr) 1986-04-23

Family

ID=27261599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83302607A Withdrawn EP0095837A3 (fr) 1982-05-26 1983-05-09 Dispositif et procédé d'essai de puits

Country Status (5)

Country Link
EP (1) EP0095837A3 (fr)
CA (1) CA1193473A (fr)
GB (1) GB2121086B (fr)
MX (1) MX162485A (fr)
NO (1) NO831830L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377952A (en) * 2001-07-27 2003-01-29 Schlumberger Holdings Fluid sampling and sensor device
US6871532B2 (en) * 2001-10-12 2005-03-29 Schlumberger Technology Corporation Method and apparatus for pore pressure monitoring

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107727432B (zh) * 2017-11-25 2020-03-24 吉林大学 振动式海洋水合物保压取样器
CN110849435B (zh) * 2019-11-26 2020-08-28 中国矿业大学 一种监测钻孔内含水层阻隔器及多层水位变化监测方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059695A (en) * 1960-03-07 1962-10-23 Jersey Prod Res Co Drill stem testing device
US4108243A (en) * 1977-05-27 1978-08-22 Gearhart-Owen Industries, Inc. Apparatus for testing earth formations
US4252195A (en) * 1979-07-26 1981-02-24 Otis Engineering Corporation Well test systems and methods
US4274486A (en) * 1979-11-16 1981-06-23 Otis Engineering Corporation Apparatus for and method of operating a well
US4289201A (en) * 1979-08-20 1981-09-15 Otis Engineering Corporation Well test apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059695A (en) * 1960-03-07 1962-10-23 Jersey Prod Res Co Drill stem testing device
US4108243A (en) * 1977-05-27 1978-08-22 Gearhart-Owen Industries, Inc. Apparatus for testing earth formations
US4252195A (en) * 1979-07-26 1981-02-24 Otis Engineering Corporation Well test systems and methods
US4289201A (en) * 1979-08-20 1981-09-15 Otis Engineering Corporation Well test apparatus
US4274486A (en) * 1979-11-16 1981-06-23 Otis Engineering Corporation Apparatus for and method of operating a well

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377952A (en) * 2001-07-27 2003-01-29 Schlumberger Holdings Fluid sampling and sensor device
GB2377952B (en) * 2001-07-27 2004-01-28 Schlumberger Holdings Receptacle for sampling downhole
US7062958B2 (en) 2001-07-27 2006-06-20 Schlumberger Technology Corporation Receptacle for sampling downhole
US6871532B2 (en) * 2001-10-12 2005-03-29 Schlumberger Technology Corporation Method and apparatus for pore pressure monitoring

Also Published As

Publication number Publication date
GB2121086A (en) 1983-12-14
EP0095837A3 (fr) 1986-04-23
GB2121086B (en) 1985-09-04
CA1193473A (fr) 1985-09-17
NO831830L (no) 1983-11-28
MX162485A (es) 1991-05-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): BE DE FR IT NL

17P Request for examination filed

Effective date: 19831102

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Effective date: 19870126

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18D Application deemed to be withdrawn

Effective date: 19870606

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOLLIS, ANDREW PATRICK