WO2011143034A1 - Method and system for well access to subterranean formations - Google Patents
Method and system for well access to subterranean formations Download PDFInfo
- Publication number
- WO2011143034A1 WO2011143034A1 PCT/US2011/035202 US2011035202W WO2011143034A1 WO 2011143034 A1 WO2011143034 A1 WO 2011143034A1 US 2011035202 W US2011035202 W US 2011035202W WO 2011143034 A1 WO2011143034 A1 WO 2011143034A1
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- WO
- WIPO (PCT)
- Prior art keywords
- well
- control assembly
- wellbore
- entry
- wells
- Prior art date
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 20
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- 230000037361 pathway Effects 0.000 claims description 30
- 238000005553 drilling Methods 0.000 claims description 26
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Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0007—Equipment or details not covered by groups E21B15/00 - E21B40/00 for underwater installations
- E21B41/0014—Underwater well locating or reentry systems
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0021—Safety devices, e.g. for preventing small objects from falling into the borehole
Definitions
- the present invention relates to a method and system for design, construction, and operation of one or more wells in a subterranean formation. More specifically, the method and system provide multi-entry access to wells.
- a mono-entry well has a single point-of-entry to drill, complete, produce, service, and log data to or from subterranean formations.
- the traditional activities include: 1) drilling a borehole, 2) running and grouting casing in the borehole with cement, 3) deepening the well by drilling through the previously grouted casing, 4) repeating this process until reaching the target depth, 5) completing the well to achieve hydraulic communication with the reservoir by any number of operational connecting procedures (such as perforating the last string of cemented casing with explosive charges), and 6) producing hydrocarbons to surface.
- the traditional method of well architecture generally affords that the well may be re-entered for: 1) servicing, to affect mechanical repairs, enhance production, or re-configure the well, and 2) logging, to obtain measurements or samples, to perform subsequent analysis and decision making.
- a single point-of-entry also presumed a "single pathway" to drill, complete, produce, service and log within the well.
- the industry advanced technology for well architectures to permit for "multiple pathways" below the surface (“multi-lateral” wells), while maintaining a single point-of-entry from the well surface.
- the present invention provides a method and system for accessing a well to subterranean formations in which a first well control assembly is directly associated with the well and a second well control assembly is remotely and capable of being in fluid communication with the well.
- FIG. 1 schematically illustrates one embodiment of a well architecture that provides multi-entry access to a wellbore.
- FIGs. 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 21, 2J, and 2K schematically illustrate embodiments having the multi-entry access capability of Fig. 1. and optional well access capability to a primary wellbore through an intercepting juncture.
- Figs. 2A through 2K illustrate non-limiting examples of intercept pathways.
- FIG. 3 schematically illustrates another embodiment of a multi-access well system similar to Fig. 2B except that the primary wellbore is illustrated as having multi- lateral pathways.
- FIG. 4 schematically illustrates another embodiment of a multi-access well system similar to Fig. 2B except that a well template provides support structure for three wells with well control assemblies for each.
- a well may have a substantially circular cross section, or other cross-sectional shapes (for example, circles, ovals, squares, rectangles, triangles, slits, or other regular or irregular shapes).
- Wells may be cased, cased and cemented, open-hole, or partly cased and partly open-hole, and may be any type, including, but not limited to a producing well, an experimental well, an exploratory well, or the like.
- a well may be vertical, horizontal, or any angle between vertical and horizontal (a deviated well), for example a vertical well may comprise a non-vertical segment.
- a well may also be a multi-lateral well system.
- pressure control assembly refers to equipment which may include well control devices such as a wellhead, blowout preventer (BOP), a Christmas tree, pressure control systems that may be attached to or incorporated in the wellhead BOP or Christmas tree.
- BOP blowout preventer
- a pressure control is typically provided by a blowout preventer (BOP) which is installed on a wellhead.
- BOP blowout preventer
- a completion is placed in the well that provides an interface with the subterranean formations and the tubular conduit for the well fluid and pressure control is provided by a christmas tree which is installed on top of the wellhead, and has isolation valves and choke equipment to control the flow of well fluids during production.
- the pressure control assembly may include control systems to monitor, measure, and react to sensor outputs from sensors at the well surface or down the well.
- the pressure control assembly may control one or more downhole safety valves.
- the pressure control assembly can perform functions including: allowing well drilling and well completion operations to be carried out under formation pressure; controlling the flow of fluids into or out of the well, including shutting off the flow; effecting a rapid shutdown of fluid flows commonly known as blow out prevention; and controlling hydrocarbon production operations.
- well control refers to the broad range of flow control measures that are taken to redirect the movement of pressure and fluids within a well.
- the term "wellhead” refers generally to the equipment that provides the structural and pressure containing interface for well drilling and production equipment.
- the primary purpose of a wellhead is to provide the suspension point and pressure seals for the casing strings that run from the bottom of the well to the surface pressure control equipment.
- a wellhead is typically installed during drilling operations and form an integral structure of the well.
- the wellhead is typically referred to as a subsea wellhead.
- christmas tree refers to any collection of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well, disposal well, and other types of wells.
- the primary function of a tree is to control the fluid flow into or out of the well, usually oil or gas.
- a tree often provides numerous additional functions including chemical injection points, well intervention means, pressure relief means (such as annulus vent), tree and well monitoring points (such as pressure, temperature, corrosion, erosion, sand detection, flow rate, flow composition, valve and choke position feedback, connection points for assemblies such as down hole pressure and temperature transducer (DHPT).
- DHPT down hole pressure and temperature transducer
- Subsea wells and thus trees usually flow through flowlines to a fixed or floating production platform or to a storage vessel (known as a floating storage offloading vessel (FSO), or floating processing unit (FPU), or floating production and offloading vessel or FPSO or other combination of structures).
- a floating storage offloading vessel FSO
- FPU floating processing unit
- FPSO floating production and offloading vessel
- subsea well means a well that has a wellhead proximate to the marine body bottom, such as an ocean bottom.
- subsea is intended to incorporate any body of water
- BOP or “blow out preventer” refers to equipment generally used to control pressures in the annular space between the openhole and tubulars and equipment run in the well during drilling, completion, and workover operations.
- multi-lateral well system refers to a well having two or more independent laterals and share an hydraulic pathway.
- a multi-lateral well system has a primary pathway that extends from a wellhead down into a surface earth formation and at least one branch pathway that intersects the primary pathway at a subsurface location.
- a lateral may also extend from another lateral pathway.
- the creation of multilateral wells from either new or existing wellbores usually involves some sort of sidetracking process that utilizes whipstocks and/or section mills to create an exit point in the casing to allow a drilling assembly to "kick-off from the main wellbore.
- multi-entry well refers to a well system having two or more independent wellhead or tree valve systems at or near the surface that share a hydraulic pathway.
- multi-access well refers to a well system having two or more pathways and may include aspects of either multi-entry and multi-lateral wells.
- a multi-access well provides multiple pathways of access, either to subterranean formations, to surface, or both.
- subterranean formation and/or “subsurface formation” means a subsurface region, regardless of size, comprising an aggregation of subsurface sedimentary, metamorphic, and/or igneous matter, whether consolidated or unconsolidated, and other subsurface matter, whether in a solid, semi-solid, liquid, and/or gaseous state, related to the geological development of the subsurface region.
- a formation may contain numerous geologic strata of different ages, textures, and mineralogic compositions.
- a subterranean formation may include a subterranean, or subsurface, reservoir that includes oil or other gaseous or liquid hydrocarbons, water, or other fluids.
- a subterranean formation may include, but not limited to geothermal reservoirs, petroleum reservoirs, sequestering reservoirs, and the like.
- the term "well surface" when used with respect to a subsea well refers to the well at or near the seafloor.
- the present invention relates generally to the design, construction and operation of wells in subterranean formations.
- a new well architecture is described herein that provides multiple "points-of-entry” ("multi-entry” wells) to achieve “multiple pathways", thereby permitting multiple "means-of-access” (“multi-access” wells) to subterranean formations.
- the invention is particularly beneficial for applications having seasonal or operational constraints, emergency deployment considerations, environmental impact issues or economic drivers.
- the description of the invention disclosed herein, and its preferred embodiments, are not intended to limit the scope. Several modifications, alternatives and equivalents may be employed without departing from the scope and spirit of the invention.
- Fig. 1 schematically illustrates one embodiment.
- Wellbore 10 is shown having been drilled from a sea floor 1 1.
- a well control assembly 12 is attached to the wellbore 10 at or near the mudlinel 1.
- Well control assembly 12 may comprise wellhead 14 and well control system 16 such as a Christmas tree or BOP.
- a horizontal tubular 18 connects well control assembly 12 to a second well control assembly 20.
- Well control assembly 20 may comprise a wellhead 22 and well control system 24.
- the well control assembly 20 preferably provides substantially the same well control functionality on wellbore 10 as provided by well control assembly 12.
- a second horizontal tubular 26 extends from well control assembly 20 and brought to a vertical direction (not shown) to a floating vessel, a gravity -based platform, or to an onshore location. Any number of valves (not shown) may be utilized to regulate pressure and flow in horizontal tubulars 18 and 26.
- Casing string 25 may be installed to support the weight and loads of the well control assembly 20 or to pre-configure another pathway entry point.
- a riser (not shown) is attached to the well control assembly 12 and drill string (not shown) is passed through the riser, through the well control assembly 12 into the wellbore for carrying out drilling operations.
- drill string (not shown) is passed through the riser, through the well control assembly 12 into the wellbore for carrying out drilling operations.
- well control is carried out principally by well control assembly 12. In the event the functionality of well control assembly 12 becomes impaired or inoperative, some well control operations on wellbore 10 can be carried out using well control assembly 20.
- Well control assembly 12 may be configured to enable drilling to be carried out from a from a rig on a vessel (such as drill ship or a floating rig), a land-based rig, a rig on a shallow-water platform, or substantially any location suitable to support such activity.
- well control assembly 20 may be configured to enable drilling to be carried out from a from a rig on a vessel (such as drill ship or a floating rig), a land-based rig, a rig on a shallow-water platform, or substantially any location suitable to support such activity.
- FIGs. 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 21, 2J, and 2K schematically illustrate additional embodiments of multi-entry well architectures in the practice of the present invention.
- the additional points of well entry shown in these figures may be implemented either concurrent or subsequent to other well construction processes, depending on the particular business need.
- at least one pathway is at or near the surface between the multiple points of well entry.
- intercept wells are shown drilled from well control assembly 20.
- the intercept wells being well 28a in Fig. 2A, well 28b in Fig. 2B, well 28c in Fig. 2C, well 28d in Fig. 2D, well 28e in Fig. 2E, well 28f in Fig. 2F, well 28g in Fig. 2G, well 28h in Fig. 2H, well 28i in Fig. 21, well 28j in Fig. 2J, and well 28k in Fig. 2K.
- Fig. 2A well 28a intersects wellbore 10 to provide a pathway juncture.
- well 28b is drilled before wellbore 10 is drilled or at the same time wellbore 10 is drilled.
- well 28a before wellbore 10 is drilled to a depth in which it may encounter high pressures.
- well 28b is drilled to a location close to but not intersecting the wellbore. The lower end of well 28b may be a few meters from wellbore 10 up to 100 or more meters.
- well control assembly 12 is not adequate to control well 10 and well control assembly 20 is not adequate to control wellbore 10 through horizontal tubular 18
- well 28a may be drilled to intercept wellbore 10 to provide well control operations on wellbore 10.
- wellbore 10 may be used as a relief well to assist in providing well control operations on well 28b.
- Intercept well 28c in Fig. 2C, 28d in Fig. 2D, 28e in Fig. 2E, 28f in Fig. 2F, and 28g in Fig. 2G illustrate optional path configurations in which the intercept wells directly intercept wellbore 10.
- Intercept well 28h in Fig. 2H, 28i in Fig. 21, 28j in Fig. 2J, 28k in Fig. 2K have multi-lateral wells systems.
- multi-lateral wells 29a, 29b, and 29c are drilled from well 28h to intercept wellbore 10.
- multi-lateral wells 30a and 30b are drilled from well 28i to intercept wellbore 10.
- multi-lateral wells 31a, 31b, and 31c are drilled from well 28j to intercept wellbore 10.
- multi-lateral wells 32a and 32b are drilled from well 28k to intercept wellbore 10.
- pathway 3 shows a multi-access well system similar to Fig. 2B except that wellbore 10 is illustrated having multi-lateral pathways, for example pathways 10a, 10b and 10c.
- pathway 328 may be drilled to intercept pathway 10c to provide fluid communication for carrying out well control operations, such as plugging pathway 10a.
- Fig. 4 show multi-access well system similar to Fig. 2B except that a well template 13 provide support structure for three wells lOd, lOe, and lOf, with well control assemblies 12a, 12b, and 12c, respectively.
- Horizontal tubular 18 may be connected to a manifold that provides independent flow access to wells lOd, lOe, and lOf.
- Flow path 428 may have been drilled to a location proximate wells lOd, lOe, and lOf as shown as indicated by the solid line.
- Dashed line 428a shows the path of pathway 428 in the event pathway 428 is extended to intercept one of the lines lOd, lOe, or lOf.
- dashed line 428 is shown intercepting well lOe.
- the horizontal tubulars 18 and 26 may be assembled onshore and towed to the location or installed using a pipeline installation barge or other pipeline installation techniques well known in industry.
- a horizontal tubular is a tubular structure that is oriented primarily or substantially in a horizontal direction and that may arc vertical or bend at an intermediate angle at each end, and/or along the length of the tubular.
- well control assemblies 12 and 20 and horizontal tubulars 18 and 26 may optionally be buried below the seafloor to minimize potential ice flow impact on such structures.
- the distance between well control assemblies 12 and 20 may be selected by persons skilled in the art taking into account the depth of wellbore 10, and water depth. For example, if blowout occurs in wellbore 10 and intercept operations from a floating drilling rig to complete drilling of well 28b in Fig. 2B, the distance between well control assembly 20 and well control assembly 12 should be sufficient to ensure safe drilling activities in well 28b.
- fluid communication access to wellbore 10 may be provided by the following paths: (a) horizontal tubular 26, through well control assembly 20, through horizontal tubular 18, and through well control assembly 12 to wellbore 10;
- the multi-entry well system permits obtaining data (e.g., pressure, temperature, acoustic, electromagnetic, strain, nuclear, passive seismic, etc.) along the access-entry pathway, at or near the point of pathway intersections, and along any other pathway segment comprising the well architecture and nearby surrounding subterranean formations.
- data e.g., pressure, temperature, acoustic, electromagnetic, strain, nuclear, passive seismic, etc.
- the multi-entry well system permits the movement of fluids (e.g., liquids, gases, chemical agents), particulate solids (e.g., gravel, proppant, salts, ball sealers), and small pumpable equipment (e.g., plugs, pigs, etc.).
- fluids e.g., liquids, gases, chemical agents
- particulate solids e.g., gravel, proppant, salts, ball sealers
- small pumpable equipment e.g., plugs, pigs, etc.
- the multi-entry well system permits the use of mechanical conveyance (e.g., wireline, coiled tubing, jointed pipe, etc.) to run and position tools (e.g., bits, mills, scrappers, logs, etc.) and production equipment (e.g., packers, plugs, tubulars, hangers, etc.).
- mechanical conveyance e.g., wireline, coiled tubing, jointed pipe, etc.
- run and position tools e.g., bits, mills, scrappers, logs, etc.
- production equipment e.g., packers, plugs, tubulars, hangers, etc.
- Well control assembly 12 located offshore on the seafloor, which may be designated well entry access # 1, may be configured for initial drilling and running of larger diameter casing strings, while well control assembly 20 (located onshore), which may be designated well entry access # 2, may be configured for the remainder of the drilling and completions operations.
- Well control assembly 20 may also be used for subsequent production and minor well servicing operations while well control assembly 12 may be retained to facilitate major well servicing operations (including rapid well killing) and well abandonment operations at a later date.
- Well control assembly 12 located offshore on the seafloor
- Well control assembly 20 remotely positioned from the subsea template
- Well control assembly 20 might be pre-configured as a well control "relief well for any of the subsea template wells and equipped for an immediate "top kill” operation or partially drilled to depth to permit either an intermediate-depth or deep “kill well” drilling operation.
- Well control assembly 12 located onshore and positioned optimal to reach the reservoir
- Well control assembly 20 might be configured to produce, log, and perform minor well servicing.
- Well control assembly 12 located offshore on the seafloor
- Well control assembly 20 located offshore on a gravity based platform
- Well control assembly 20 may be configured to log, perform minor well servicing, and assist in well abandonment using pumpdown (i.e., pipeline "pig” like) tools.
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2798806A CA2798806A1 (en) | 2010-05-13 | 2011-05-04 | Method and system for well access to subterranean formations |
US13/642,084 US20130037272A1 (en) | 2009-12-10 | 2011-05-04 | Method and system for well access to subterranean formations |
RU2012153778/03A RU2012153778A (en) | 2010-05-13 | 2011-05-04 | METHOD AND SYSTEM FOR ACCESS TO A WELL IN UNDERGROUND STRESSES |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33433310P | 2010-05-13 | 2010-05-13 | |
US61/334,333 | 2010-05-13 | ||
US35694610P | 2010-06-21 | 2010-06-21 | |
US61/356,946 | 2010-06-21 | ||
USPCT/US2010/050534 | 2010-09-28 | ||
PCT/US2010/050534 WO2011071586A1 (en) | 2009-12-10 | 2010-09-28 | System and method for drilling a well that extends for a large horizontal distance |
Publications (1)
Publication Number | Publication Date |
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WO2011143034A1 true WO2011143034A1 (en) | 2011-11-17 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2011/035202 WO2011143034A1 (en) | 2009-12-10 | 2011-05-04 | Method and system for well access to subterranean formations |
Country Status (4)
Country | Link |
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US (1) | US20130037272A1 (en) |
CA (1) | CA2798806A1 (en) |
RU (1) | RU2012153778A (en) |
WO (1) | WO2011143034A1 (en) |
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WO2013107462A3 (en) * | 2012-01-18 | 2014-01-16 | Maersk Supply Service A/S | Method of drilling a well |
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US8919441B2 (en) * | 2012-07-03 | 2014-12-30 | Halliburton Energy Services, Inc. | Method of intersecting a first well bore by a second well bore |
US9068413B2 (en) * | 2012-09-14 | 2015-06-30 | Baker Hughes Incorporated | Multi-piston hydrostatic setting tool with locking feature and pressure balanced pistons |
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BR112017004290B1 (en) * | 2014-10-06 | 2021-11-03 | Halliburton Energy Services, Inc. | METHOD TO INTERCEPT A FIRST WELL HOLE FORMED IN A FORMATION BY A SECOND WELL HOLE, E, WELL INTERVENTION DRILLING SYSTEM |
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2011
- 2011-05-04 WO PCT/US2011/035202 patent/WO2011143034A1/en active Application Filing
- 2011-05-04 RU RU2012153778/03A patent/RU2012153778A/en not_active Application Discontinuation
- 2011-05-04 US US13/642,084 patent/US20130037272A1/en not_active Abandoned
- 2011-05-04 CA CA2798806A patent/CA2798806A1/en not_active Abandoned
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US3256937A (en) * | 1959-07-30 | 1966-06-21 | Shell Oil Co | Underwater well completion method |
US4474236A (en) * | 1982-03-17 | 1984-10-02 | Cameron Iron Works, Inc. | Method and apparatus for remote installations of dual tubing strings in a subsea well |
US5379844A (en) * | 1993-02-04 | 1995-01-10 | Exxon Production Research Company | Offshore platform well system |
US20040074649A1 (en) * | 2001-01-10 | 2004-04-22 | Hatton Stephen A. | Method of drilling and operating a subsea well |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013107462A3 (en) * | 2012-01-18 | 2014-01-16 | Maersk Supply Service A/S | Method of drilling a well |
CN104254661A (en) * | 2012-01-18 | 2014-12-31 | 马士基供应服务股份有限公司 | Method of drilling a well |
GB2518054A (en) * | 2012-01-18 | 2015-03-11 | Maersk Supply Service As | Method of drilling a well |
GB2518054B (en) * | 2012-01-18 | 2015-10-14 | Maersk Supply Service As | Method of drilling a well |
NO343506B1 (en) * | 2012-01-18 | 2019-03-25 | Maersk Supply Service As | Method of drilling a well |
Also Published As
Publication number | Publication date |
---|---|
CA2798806A1 (en) | 2011-11-17 |
US20130037272A1 (en) | 2013-02-14 |
RU2012153778A (en) | 2014-06-20 |
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