WO2010149643A1 - A completion assembly and a method for stimulating, segmenting and controlling erd wells - Google Patents

A completion assembly and a method for stimulating, segmenting and controlling erd wells Download PDF

Info

Publication number
WO2010149643A1
WO2010149643A1 PCT/EP2010/058792 EP2010058792W WO2010149643A1 WO 2010149643 A1 WO2010149643 A1 WO 2010149643A1 EP 2010058792 W EP2010058792 W EP 2010058792W WO 2010149643 A1 WO2010149643 A1 WO 2010149643A1
Authority
WO
WIPO (PCT)
Prior art keywords
control means
well
tubular
fluid control
fluid
Prior art date
Application number
PCT/EP2010/058792
Other languages
French (fr)
Inventor
Peter Lumbye
Original Assignee
Mærsk Olie Og Gas A/S
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41612365&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010149643(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mærsk Olie Og Gas A/S filed Critical Mærsk Olie Og Gas A/S
Priority to EP10724097.0A priority Critical patent/EP2446107B1/en
Priority to US13/379,865 priority patent/US20120160524A1/en
Priority to BRPI1011754A priority patent/BRPI1011754A2/en
Publication of WO2010149643A1 publication Critical patent/WO2010149643A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • E21B33/1243—Units with longitudinally-spaced plugs for isolating the intermediate space with inflatable sleeves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
    • E21B33/134—Bridging plugs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
    • E21B33/136—Baskets, e.g. of umbrella type
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/14—Obtaining from a multiple-zone well
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • E21B43/27—Methods for stimulating production by forming crevices or fractures by use of eroding chemicals, e.g. acids
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers

Definitions

  • the present invention relates to an assembly to be run with a well tubular having openings provided in the wall and for being arranged in a well bore and thereby forming a space between said tubing and the well bore surface, said assembly comprising; first fluid control means being provided in one opening in said well tubular; second fluid control means being provided in another opening in said well tubular and; a set of packers for sealing of the space between said tubing and the well bore surface, said set of packers being positioned such that a part of the tubular having both first and second fluid control means is located between the set of packers. Thereby the packers divide the spacing between the well bore and the tubing into separate sections.
  • the present description includes both a drilled production well intended for the actual production of oil or gas, or it may be a drilled well intended for injection of water or other substances into the formation with a view to displacing oil or gas in a direction towards a drilled production well.
  • the invention aims to remedy the problems and limitations that are associated with conventional techniques for stimulating a drilled well and to provide a new assembly, wherein the invention enables subsequent control of the stimulated well.
  • the system will allow for stimulation and zonal isolation (or segmenting the reservoir), in a quick and efficient manner.
  • the object of the invention is obtained by an assembly where the first fluid control means is adapted such that it is capable of blocking fluid flow from the interior of said well tubular to said space between said tubing and the well bore surface and that the second fluid control means is adapted such that it is capable of blocking fluid flow from said space between said tubing and the well bore surface to the interior of said well tubular.
  • the first fluid control means comprises a sliding sleeve door (ssd) arranged on the tubular.
  • the sliding sleeve door comprises an aperture in the tubular through which the oil or gas will enter the tubing.
  • the sliding sleeve door can be closed or opened during operation of the well. Sliding sleeve doors are well known to the person skilled in the art and there functionality will therefore not be described in greater details.
  • screens for the removing of sand particles from the fluid of oil and gas are arranged on the outside of the sliding sleeve door.
  • Such a screen can be manufactured from the material Boron Carbide, which offers the advantage that it can only be eroded by pure diamonds.
  • Boron Carbide ceramic material has a good resistance against acids, such that cleaning of the filter can be done by an acid treatment.
  • the second fluid control means comprise a check valve, which will allow fluid to flow from the interior of said well tubular to said space between the tubular and the well bore.
  • check valve By use of check valve the stimulation treatment can flow out and into the formation through the nonreturn valves, while production flow can enter the tubular through the first fluid control means.
  • Fig. 1 shows an assembly according to an embodiment of the invention
  • Figure 1 shows a tubing 12 of the type which is usually used in the context of oil extraction is arranged in an oil well.
  • means are arranged for establishing a number of external packers 10, 11 to the effect that it is possible to produce gas or oil from selected areas of the oil reservoir.
  • the tubing has openings 3, 4 provided in the wall. Between the tubing and the well bore surface is formed a space, tubular space or annulus. In conventional tubing are these opening regular holes which allows fluid flow to run both from the interior of the tubing 12 and to annular space 5 and from the annular space to the interior of the tubing.
  • openings can e.g. be distributed as described in European patent application NO EP1184537A.
  • fluid control means (not shown in figure 1 ) which in the following is called “second fluid control means”.
  • second fluid control means are according to invention capable of limiting the fluid flow such that the fluid can only run from the interior of the tubing and to the annular space.
  • the second fluid control means might even be of the type which is capable of blocking the fluid flow in both directions.
  • the assembly also provided with another opening 6 which is equipped with first fluid control means 4.
  • the first fluid control means is, in the shown embodiment, a device called a "sliding sleeve" which is a well known piece of equipment on the E&P industry.
  • a device normally comprises a "standard” inner sleeve which allows for opening or closing (or choking) of the device. Opening or closing of a “sliding sleeve” is normally achieved by use of known intervention tools run on a wireline or a coiled tubing.
  • the opening and closing of the opening 6 can be achieved in many other ways known to the person skilled in the art and the activation of the first fluid control means can even be made such that it is controllable from the surface.
  • the packers 10, 11 are positioned such that a part the tubular having both first 4 and second fluid control means 3 is located between the set of packers 10, 11.
  • the first fluid control means is adapted such that it is capable of selectively opening or blocking fluid flow from the interior of said well tubular to said space 5 between the formation and the well tubular 2 and the second fluid control means is adapted such that it is capable of blocking fluid flow from said space to the interior of said well tubular.
  • Such a configuration entails that the inflow of fluid from the annular space situated between the packers 11 , 12 and to the interior of the tubing is controllable by activation (opening or closing) of the first fluid control means 4.
  • the assembly comprises an inflatable packer section or a "mechanical" packer that does not rely on inflation with fluids.
  • packers are known in the industry and comprises e.g. packers that needs to be triggered with a timer and then it sets by squeezing a steel enforced rubber membrane that then creates the seal.
  • the inflatable packer section might be equipped with one or more packers which can be inflated by fluid.
  • Such inflatable packers are well known to the person skilled in the art and normally they may be used on the outside of a well tubular.
  • the section normally provided with one or more valves for opening and closing of fluid communication into (or out of) the inflatable packer section.
  • the energy required for delivering of fluid into the inflatable packer section might be delivered by any suitable energy source, as e.g. one or more batteries contained in an energy section.
  • the assembly might further comprises a triggering section.
  • the triggering section is capable of controlling the energy source and/or controlling of the valve means. Thereby is the triggering section capable of controlling the delivery of fluid into the inflatable packer section.
  • the triggering section is thus a "trigger/detect function" that is capable of controlling the flow of inflation fluid to the packer. It will either release the flow of fluid by opening of valve(s) to the packer. Or it will turn on e.g. an electrical pump that will transfer the fluid into the packer. In one embodiment of the invention is the triggering section also capable of controlling the opening and/or closing of the first fluid control means.
  • the triggering system can be activated either by a timing mechanism, RFID detection, seismic, or other kinds of sonic, electric signal or optical.
  • FIG 1 there is shown a horizontal well drilled into the formation.
  • a well tubular 12 is introduced into the well.
  • a well tubular can be a casing or a liner.
  • the outside diameter of the casing is smaller than the inside diameter of the wellbore, providing thereby an annular space 5, or annulus, between the tubular and the wellbore.
  • the well tubular is perforated 3 at one or more zones.
  • In order to stimulate the well fluid as e.g acid is discharged into the annular space through these openings configured in the wall of the tubular .
  • the openings 3 can have a shape and location that comply with particular, pre-defined specifications, as e.g. described in patent application NO EP 1184537A.
  • packers After stimulating of the well is at least two packers expanded in order to seal off a part of said annular space.
  • the packers could also be expanded prior to pumping of acid.
  • the second fluid control means As described above, acid stimulation of the well takes place through the second fluid control means.
  • the first fluid control means are usually closed. Since the second fluid control means do not allow fluid to flow into the production pipe, it is therefore necessary to subsequently open the first fluid control means to allow the production flow to run into the production pipe.
  • the second fluid control means usually comprise one-way valves that allow fluid to flow from the interior of the well tubing and into the formation via the annular space, while the flow of fluid is blocked in the opposite direction.
  • this was described in particular for use in conventional production wells, and in that context the advantage obtained was that of achieving a higher degree of control of the valve, all production in the individual sections of the well (between two packers) taking place through the controllable first fluid control means. By that configuration it is thus obtained that it is possible to close off each of the sections by means of the first fluid control means, which may be convenient eg in the context of water breakthroughs.
  • the second fluid control means may also be constituted by valves that are provided with a mechanism which is capable of closing off the valves completely.
  • the embodiments of the invention described above relates mainly to conventional oil producing wells.
  • the invention can also be implemented in a well into which water or pressurized gas is pumped in order to push petroleum resources out of underground reservoirs toward a production wells so as to increase its production.
  • a well is commonly known as a injection well.
  • valves equipped with a (self-closing) mechanism which is capable of completely closing off the valves, it is accomplished that also "injector wells" can be stimulated with acid prior to being used.
  • the second fluid control means may thus be equipped with a closure mechanism that does not close until a given period of time has elapsed.
  • the second fluid control means may also be equipped with a closure mechanism that does not close until the closure mechanism is activated by some kind of activation means, as e.g described below in connection with injection wells. Thereby it is obtained that (when the well is a recently established one) acid stimulation may take place through the second fluid control means while in their open state.
  • the second fluid control means are subsequently closed, the subsequent injection of water will take place via the first fluid control means in the individual sections of the well (between two packers) and thereby an increased control of that type of well is also accomplished since the individual sections can thereby be closed down by means of the first fluid control means.
  • the openings are provided with second fluid control means 3 which allows fluid to flow from the tubing and into the annular space 5.
  • the second fluid control means might comprises a check valve, a one-way valve or it might even be made as self closing valves that are activated after pumping of acid into the well. This can be accomplished by use of e.g. by "an acid-activated valve” as described below.
  • a special non-return valve will be installed with an "acid detection” mechanism or a “delayed closing” mechanism.
  • the mechanism is that the valve will have some of its components made of a material that is acid solvable (e.g. zinc, aluminium etc.). This acid solvable material is used to protect a "hold-open” mechanism. Once the stimulation job is performed, this hold-open mechanism is dissolved, and the non-return valve will shut off flow from both directions, effectively turning into a plug.
  • a delayed closing valve can be made with a water swellable elastomer compound that slowly swells during injection of water and thereby slowly closes the valve, permanently.

Abstract

The invention relates to an assembly to be run with a well tubular having openings provided in the wall and for being arranged in a well bore and thereby forming a space between said tubing and the well bore surface. The assembly comprising: first fluid control means and second fluid control means being provided in another opening in said well tubular. The assembly further having a set of packers for sealing of the space between said tubing and the well bore surface, said set of packers being positioned such that a part the tubular having both first and second fluid control means is located between the set of packers. The first fluid control means is adapted such that it is capable of blocking fluid flow from the interior of said well tubular to said space between said tubing and the well bore surface. The second fluid control means is adapted such that it is capable of blocking fluid flow from said space between said tubing and the well bore surface to the interior of said well tubular.

Description

A completion assembly and a method for stimulating, segmenting and controlling ERD wells
Description
Technical field
The present invention relates to an assembly to be run with a well tubular having openings provided in the wall and for being arranged in a well bore and thereby forming a space between said tubing and the well bore surface, said assembly comprising; first fluid control means being provided in one opening in said well tubular; second fluid control means being provided in another opening in said well tubular and; a set of packers for sealing of the space between said tubing and the well bore surface, said set of packers being positioned such that a part of the tubular having both first and second fluid control means is located between the set of packers. Thereby the packers divide the spacing between the well bore and the tubing into separate sections.
The present description includes both a drilled production well intended for the actual production of oil or gas, or it may be a drilled well intended for injection of water or other substances into the formation with a view to displacing oil or gas in a direction towards a drilled production well.
Related prior art
Before the injection of water into the formation can be initiated, it is necessary to stimulate a well bore by pumping down acid that decomposes the compacted layer of drilling mud on the wall of the well bore and a part of the formation. The acid is conveyed into the well bore by means of a supply pipe with a nozzle head that is, while acid is being pumped down, withdrawn slowly from the bottom of the well bore. The described process is labour- intensive, costly and delays the time of onset of production.
Object of the invention
The invention aims to remedy the problems and limitations that are associated with conventional techniques for stimulating a drilled well and to provide a new assembly, wherein the invention enables subsequent control of the stimulated well. The system will allow for stimulation and zonal isolation (or segmenting the reservoir), in a quick and efficient manner.
Summary of the invention
The object of the invention is obtained by an assembly where the first fluid control means is adapted such that it is capable of blocking fluid flow from the interior of said well tubular to said space between said tubing and the well bore surface and that the second fluid control means is adapted such that it is capable of blocking fluid flow from said space between said tubing and the well bore surface to the interior of said well tubular.
In one embodiment of the invention the first fluid control means comprises a sliding sleeve door (ssd) arranged on the tubular. The sliding sleeve door comprises an aperture in the tubular through which the oil or gas will enter the tubing. The sliding sleeve door can be closed or opened during operation of the well. Sliding sleeve doors are well known to the person skilled in the art and there functionality will therefore not be described in greater details.
In another embodiment screens for the removing of sand particles from the fluid of oil and gas are arranged on the outside of the sliding sleeve door. Such a screen can be manufactured from the material Boron Carbide, which offers the advantage that it can only be eroded by pure diamonds. Furthermore, Boron Carbide ceramic material has a good resistance against acids, such that cleaning of the filter can be done by an acid treatment.
In another embodiment the second fluid control means comprise a check valve, which will allow fluid to flow from the interior of said well tubular to said space between the tubular and the well bore. By use of check valve the stimulation treatment can flow out and into the formation through the nonreturn valves, while production flow can enter the tubular through the first fluid control means.
Other embodiment of the invention are recited in the independent claims
A method of use of the assembly are recited in claims 17-19
The invention will now be described in further detail with reference to the preferred embodiment shown in the drawing.
Fig. 1 shows an assembly according to an embodiment of the invention,
Figure 1 shows a tubing 12 of the type which is usually used in the context of oil extraction is arranged in an oil well. In the shown embodiment means are arranged for establishing a number of external packers 10, 11 to the effect that it is possible to produce gas or oil from selected areas of the oil reservoir. The tubing has openings 3, 4 provided in the wall. Between the tubing and the well bore surface is formed a space, tubular space or annulus. In conventional tubing are these opening regular holes which allows fluid flow to run both from the interior of the tubing 12 and to annular space 5 and from the annular space to the interior of the tubing.
These openings can e.g. be distributed as described in European patent application NO EP1184537A. In the assembly according to the invention these openings are provided with fluid control means (not shown in figure 1 ) which in the following is called "second fluid control means". These second fluid control means are according to invention capable of limiting the fluid flow such that the fluid can only run from the interior of the tubing and to the annular space. However as described later, the second fluid control means might even be of the type which is capable of blocking the fluid flow in both directions.
In the shown embodiment is the assembly also provided with another opening 6 which is equipped with first fluid control means 4. The first fluid control means is, in the shown embodiment, a device called a "sliding sleeve" which is a well known piece of equipment on the E&P industry. Such a device normally comprises a "standard" inner sleeve which allows for opening or closing (or choking) of the device. Opening or closing of a "sliding sleeve" is normally achieved by use of known intervention tools run on a wireline or a coiled tubing. However the opening and closing of the opening 6 can be achieved in many other ways known to the person skilled in the art and the activation of the first fluid control means can even be made such that it is controllable from the surface.
The packers 10, 11 are positioned such that a part the tubular having both first 4 and second fluid control means 3 is located between the set of packers 10, 11. Normally, the first fluid control means is adapted such that it is capable of selectively opening or blocking fluid flow from the interior of said well tubular to said space 5 between the formation and the well tubular 2 and the second fluid control means is adapted such that it is capable of blocking fluid flow from said space to the interior of said well tubular. Such a configuration entails that the inflow of fluid from the annular space situated between the packers 11 , 12 and to the interior of the tubing is controllable by activation (opening or closing) of the first fluid control means 4. By establishing of several independent assemblies having both first and second fluid control means in a well as described above it is thus possible to stimulate and open up or close off production from selected parts of the well. Opening and/or closing off such a part is normally done on order to isolate e.g. a water producing part of the well to ingress of water, or to delimit a part of the well.
In one embodiment of the invention the assembly comprises an inflatable packer section or a "mechanical" packer that does not rely on inflation with fluids. Such packers are known in the industry and comprises e.g. packers that needs to be triggered with a timer and then it sets by squeezing a steel enforced rubber membrane that then creates the seal.
The inflatable packer section might be equipped with one or more packers which can be inflated by fluid. Such inflatable packers are well known to the person skilled in the art and normally they may be used on the outside of a well tubular. In order to control the inflation (or deflation) of the inflatable packer section is the section normally provided with one or more valves for opening and closing of fluid communication into (or out of) the inflatable packer section.
The energy required for delivering of fluid into the inflatable packer section might be delivered by any suitable energy source, as e.g. one or more batteries contained in an energy section. In order to control the expanding of the inflatable packers the assembly might further comprises a triggering section. The triggering section is capable of controlling the energy source and/or controlling of the valve means. Thereby is the triggering section capable of controlling the delivery of fluid into the inflatable packer section.
The triggering section is thus a "trigger/detect function" that is capable of controlling the flow of inflation fluid to the packer. It will either release the flow of fluid by opening of valve(s) to the packer. Or it will turn on e.g. an electrical pump that will transfer the fluid into the packer. In one embodiment of the invention is the triggering section also capable of controlling the opening and/or closing of the first fluid control means.
The triggering system can be activated either by a timing mechanism, RFID detection, seismic, or other kinds of sonic, electric signal or optical.
One method of use of an embodiment of the invention will now be described.
Turning to figure 1 there is shown a horizontal well drilled into the formation. In figure 1 the well has been drilled and a well tubular 12 is introduced into the well. Such a well tubular can be a casing or a liner. The outside diameter of the casing is smaller than the inside diameter of the wellbore, providing thereby an annular space 5, or annulus, between the tubular and the wellbore. The well tubular is perforated 3 at one or more zones. In order to stimulate the well fluid as e.g acid is discharged into the annular space through these openings configured in the wall of the tubular .
The openings 3 can have a shape and location that comply with particular, pre-defined specifications, as e.g. described in patent application NO EP 1184537A.
After stimulating of the well is at least two packers expanded in order to seal off a part of said annular space. However the packers could also be expanded prior to pumping of acid.
As described above, acid stimulation of the well takes place through the second fluid control means. During this process, the first fluid control means are usually closed. Since the second fluid control means do not allow fluid to flow into the production pipe, it is therefore necessary to subsequently open the first fluid control means to allow the production flow to run into the production pipe. The second fluid control means usually comprise one-way valves that allow fluid to flow from the interior of the well tubing and into the formation via the annular space, while the flow of fluid is blocked in the opposite direction. As mentioned above, this was described in particular for use in conventional production wells, and in that context the advantage obtained was that of achieving a higher degree of control of the valve, all production in the individual sections of the well (between two packers) taking place through the controllable first fluid control means. By that configuration it is thus obtained that it is possible to close off each of the sections by means of the first fluid control means, which may be convenient eg in the context of water breakthroughs.
However, the second fluid control means may also be constituted by valves that are provided with a mechanism which is capable of closing off the valves completely.
The embodiments of the invention described above relates mainly to conventional oil producing wells. However the invention can also be implemented in a well into which water or pressurized gas is pumped in order to push petroleum resources out of underground reservoirs toward a production wells so as to increase its production. Such a well is commonly known as a injection well. By using valves equipped with a (self-closing) mechanism which is capable of completely closing off the valves, it is accomplished that also "injector wells" can be stimulated with acid prior to being used. According to one embodiment for use in those wells "the second fluid control means" may thus be equipped with a closure mechanism that does not close until a given period of time has elapsed. The second fluid control means may also be equipped with a closure mechanism that does not close until the closure mechanism is activated by some kind of activation means, as e.g described below in connection with injection wells. Thereby it is obtained that (when the well is a recently established one) acid stimulation may take place through the second fluid control means while in their open state. When the second fluid control means are subsequently closed, the subsequent injection of water will take place via the first fluid control means in the individual sections of the well (between two packers) and thereby an increased control of that type of well is also accomplished since the individual sections can thereby be closed down by means of the first fluid control means.
According to the invention, the openings are provided with second fluid control means 3 which allows fluid to flow from the tubing and into the annular space 5. The second fluid control means might comprises a check valve, a one-way valve or it might even be made as self closing valves that are activated after pumping of acid into the well. This can be accomplished by use of e.g. by "an acid-activated valve" as described below.
In injection wells, a special non-return valve will be installed with an "acid detection" mechanism or a "delayed closing" mechanism. The mechanism is that the valve will have some of its components made of a material that is acid solvable (e.g. zinc, aluminium etc.). This acid solvable material is used to protect a "hold-open" mechanism. Once the stimulation job is performed, this hold-open mechanism is dissolved, and the non-return valve will shut off flow from both directions, effectively turning into a plug.
A delayed closing valve can be made with a water swellable elastomer compound that slowly swells during injection of water and thereby slowly closes the valve, permanently.
This will facilitate that subsequent injection is directed through the opening sleeves (first fluid control means) and not through the second fluid control means (second fluid control means) inserts.

Claims

Claims
1. An assembly to be run with a well tubular having openings provided in the wall and for being arranged in a well bore and thereby forming a space between said tubing and the well bore surface, said assembly comprising: first fluid control means being provided in an opening in said well tubular, second fluid control means being provided in another opening in said well tubular and a set of packers for sealing off the space between said tubing and the well bore surface, said set of packers being positioned such that a part of the tubular having both first and second fluid control means is located between the set of packers, characterized in that said first fluid control means is adapted such that it is capable of blocking fluid flow from the interior of said well tubular to said space between said tubing and the well bore surface and that the second fluid control means is adapted such that it is capable of blocking fluid flow from said space between said tubing and the well bore surface to the interior of said well tubular, said second fluid control means comprise a check valve, which will allow fluid to flow from the interior of said well tubular to said space between the tubular and the well bore.
2. An assembly to be run with a well tubular having openings provided in the wall and for being arranged in a well bore and thereby forming a space between said tubing and the well bore surface, said assembly comprising: ■ first fluid control means being provided in an opening in said well tubular, second fluid control means being provided in another opening in said well tubular and a set of packers for sealing off the space between said tubing and the well bore surface, said set of packers being positioned such that a part of the tubular having both first and second fluid control means is located between the set of packers, characterized in that said first fluid control means is adapted such that it is capable of blocking fluid flow from the interior of said well tubular to said space between said tubing and the well bore surface and that the second fluid control means is adapted such that it is capable of blocking fluid flow from said space between said tubing and the well bore surface to the interior of said well tubular, said second fluid control means comprise a valve equipped with a self-closing mechanism which is capable of completely closing off the valves, said self-closing mechanism being adapted such that acid stimulation may take place through the second fluid control means while in their open state.
3. An assembly according to claims 1 -2 wherein the first fluid control means comprises a closable opening being operable from the surface.
4. An assembly according to claims 1 wherein the check valve is an one-way valve.
5. An assembly according to claim 3 comprising a triggering section for controlling of an energy source for controlling said closable opening, said triggering section further being provided with means for communication with a triggering device for initiating the opening or closing of said closable opening.
6. An assembly according to claims 1 -5 wherein the first fluid control means comprises a sliding sleeve door (ssd) arranged on the tubular.
7. An assembly according to claims 6 or wherein screens for the removing of sand particles from the fluid of oil and gas are arranged on the outside of the sliding sleeve door.
8. An assembly according to claim 7 wherein said screen is manufactured from the material Boron Carbide.
9. An assembly according to claims 1 -8 comprising an inflatable or mechanical set packer section prepared for being expanded by fluid, and being provided with valve means for opening and closing of fluid communication into the inflatable packer section
10. An assembly according to claims 1 -9 comprising two inflatable packers each of the prepared for being expanded by fluid and being provided with valve means for opening and closing of fluid communication into the inflatable packers.
11. An assembly according to claims 1 -10 comprising an energy section comprising an energy source for the delivering of fluid into the inflatable packer section.
12. An assembly according to claims 5-11 wherein the triggering section further comprising means for controlling of said energy source and/or for controlling of said valve means thereby being capable of controlling the delivery of said fluid into said inflatable packer section, said triggering section further being provided with means for communication with a triggering device for initiating the expansion of said inflatable packer section.
13 Assembly according to claim 5-12, wherein the triggering device is capable of being pumped through the well tubular
14. Assembly according to any one claims 5-13, wherein the triggering by said trigger section can be set by a time delay.
15. Assembly according to any one of the previous claims, wherein said trigger section triggers with a certain time delay after a pre selected pressure is monitored by said means for monitoring of the well pressure.
16. Assembly according to claims 5-15, wherein said trigger section triggers when a pre selected radio frequency identification chip is passing through said trigger section.
17. A method of using an assembly according to claims 1 -16 to seal of a part of the annulus between a well tubular and the well bore, comprising the steps of: drilling a well into a formation; introducing into the well a number of assemblies according to the invention, said assemblies partake as elements inserted between conventional tubular as e.g. a casing or liner, thereby providing an annular space, or annulus, between said tubular and the formation surrounding said tubular;; pumping of acid through said tubular and further through said second fluid control means into the formation in order to stimulate said well; triggering of at least two assemblies in order to expand two packers to seal off a part of said annular space and to open the first fluid control means, allowing production to flow into the tubular through first fluid control means.
18. A method of using an assembly according to claim 1 -17 to seal of a part of the annulus between a well tubular and the well bore, comprising the steps of: drilling a well into a formation; introducing into the well a number of assemblies according to the invention, said assemblies partake as elements inserted between conventional tubular as e.g. a casing or liner, thereby providing an annular space, or annulus, between said tubular and the formation surrounding said tubular; closing of said first fluid control means; pumping of acid through said tubular and further through said second fluid control means into the formation in order to stimulate said well; triggering of at least two assemblies in order to expand two packers to seal off a part of said annular space; opening of said first fluid control means and blocking of said second fluid control means, thereby allowing production to flow into the tubular or injection of fluids to flow through the first fluid control means into the wellbore.
19. A method of using an assembly according to claim 18 wherein said method further include the step of opening or closing of said opening in order to establish or shut off the fluid communication between said inner tube and said sealed off part of the annular space.
PCT/EP2010/058792 2009-06-22 2010-06-22 A completion assembly and a method for stimulating, segmenting and controlling erd wells WO2010149643A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10724097.0A EP2446107B1 (en) 2009-06-22 2010-06-22 A completion assembly and a method for stimulating, segmenting and controlling erd wells
US13/379,865 US20120160524A1 (en) 2009-06-22 2010-06-22 Completion assembly and a method for stimulating, segmenting and controlling erd wells
BRPI1011754A BRPI1011754A2 (en) 2009-06-22 2010-06-22 "completion set and a method for stimulating, segmenting and controlling erd wells"

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US21921009P 2009-06-22 2009-06-22
DKPA200900765 2009-06-22
DKPA200900765A DK178829B1 (en) 2009-06-22 2009-06-22 A completion assembly and a method for stimulating, segmenting and controlling ERD wells
US61/219,210 2009-06-22

Publications (1)

Publication Number Publication Date
WO2010149643A1 true WO2010149643A1 (en) 2010-12-29

Family

ID=41612365

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/058792 WO2010149643A1 (en) 2009-06-22 2010-06-22 A completion assembly and a method for stimulating, segmenting and controlling erd wells

Country Status (5)

Country Link
US (1) US20120160524A1 (en)
EP (1) EP2446107B1 (en)
BR (1) BRPI1011754A2 (en)
DK (1) DK178829B1 (en)
WO (1) WO2010149643A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2459934C1 (en) * 2011-04-26 2012-08-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Development method of multilayer non-homogeneous oil deposit
US8833469B2 (en) 2007-10-19 2014-09-16 Petrowell Limited Method of and apparatus for completing a well
US20150027724A1 (en) * 2013-07-26 2015-01-29 Weatherford/Lamb, Inc. Electronically-Actuated, Multi-Set Straddle Borehole Treatment Apparatus
US9103197B2 (en) 2008-03-07 2015-08-11 Petrowell Limited Switching device for, and a method of switching, a downhole tool
US9115573B2 (en) 2004-11-12 2015-08-25 Petrowell Limited Remote actuation of a downhole tool
US9453374B2 (en) 2011-11-28 2016-09-27 Weatherford Uk Limited Torque limiting device
US9488046B2 (en) 2009-08-21 2016-11-08 Petrowell Limited Apparatus and method for downhole communication
US10262168B2 (en) 2007-05-09 2019-04-16 Weatherford Technology Holdings, Llc Antenna for use in a downhole tubular

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130248192A1 (en) * 2012-03-22 2013-09-26 Canadian Fracturing Ltd. Multizone and zone-by-zone abrasive jetting tools and methods for fracturing subterranean formations
US9777571B2 (en) * 2013-09-17 2017-10-03 Husky Oil Operations Limited Method for determining regions for stimulation along two parallel adjacent wellbores in a hydrocarbon formation
US9611737B2 (en) * 2013-09-17 2017-04-04 Husky Oil Operations Limited Method for determining regions for stimulation along a wellbore within a hydrocarbon formation, and using such method to improve hydrocarbon recovery from the reservoir
US9534484B2 (en) * 2013-11-14 2017-01-03 Baker Hughes Incorporated Fracturing sequential operation method using signal responsive ported subs and packers
GB2526297A (en) 2014-05-20 2015-11-25 Maersk Olie & Gas Method for stimulation of the near-wellbore reservoir of a wellbore
DE102016212672B3 (en) * 2016-07-12 2017-07-06 Olympus Winter & Ibe Gmbh Device for checking the tightness of a surgical instrument, treatment device for the preparation of surgical instruments and use of a swellable material body

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897897A (en) * 1954-04-16 1959-08-04 Christian W Breukelman Testing loose sand oil well formations
US4949788A (en) * 1989-11-08 1990-08-21 Halliburton Company Well completions using casing valves
EP1184537A2 (en) 2000-09-01 2002-03-06 Maersk Olie Og Gas A/S A method of stimulating a well
US20030188871A1 (en) * 2002-04-09 2003-10-09 Dusterhoft Ronald G. Single trip method for selectively fracture packing multiple formations traversed by a wellbore
GB2394736A (en) * 2002-10-31 2004-05-05 Schlumberger Holdings Method and apparatus for cleaning a fractured interval between two packers
US20050103495A1 (en) * 2003-11-17 2005-05-19 Corbett Thomas G. Gravel pack crossover tool with single position multi-function capability
US20060042795A1 (en) * 2004-08-24 2006-03-02 Richards William M Sand control screen assembly having fluid loss control capability and method for use of same
US20080283252A1 (en) * 2007-05-14 2008-11-20 Schlumberger Technology Corporation System and method for multi-zone well treatment
US20090090502A1 (en) * 2007-10-05 2009-04-09 Peter Lumbye Annulus sealing assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6481494B1 (en) * 1997-10-16 2002-11-19 Halliburton Energy Services, Inc. Method and apparatus for frac/gravel packs
US6257338B1 (en) * 1998-11-02 2001-07-10 Halliburton Energy Services, Inc. Method and apparatus for controlling fluid flow within wellbore with selectively set and unset packer assembly
US6915848B2 (en) * 2002-07-30 2005-07-12 Schlumberger Technology Corporation Universal downhole tool control apparatus and methods
GB0310458D0 (en) * 2003-05-07 2003-06-11 Bp Exploration Operating Apparatus
AU2005233602B2 (en) * 2004-04-12 2010-02-18 Baker Hughes Incorporated Completion with telescoping perforation & fracturing tool
US7886822B2 (en) * 2007-07-27 2011-02-15 Schlumberger Technology Corporation System, method, and apparatus for acid fracturing with scale inhibitor protection
US8544548B2 (en) * 2007-10-19 2013-10-01 Baker Hughes Incorporated Water dissolvable materials for activating inflow control devices that control flow of subsurface fluids
GB2457979B (en) * 2008-03-01 2012-01-18 Red Spider Technology Ltd Electronic Completion Installation Valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897897A (en) * 1954-04-16 1959-08-04 Christian W Breukelman Testing loose sand oil well formations
US4949788A (en) * 1989-11-08 1990-08-21 Halliburton Company Well completions using casing valves
EP1184537A2 (en) 2000-09-01 2002-03-06 Maersk Olie Og Gas A/S A method of stimulating a well
US20030188871A1 (en) * 2002-04-09 2003-10-09 Dusterhoft Ronald G. Single trip method for selectively fracture packing multiple formations traversed by a wellbore
GB2394736A (en) * 2002-10-31 2004-05-05 Schlumberger Holdings Method and apparatus for cleaning a fractured interval between two packers
US20050103495A1 (en) * 2003-11-17 2005-05-19 Corbett Thomas G. Gravel pack crossover tool with single position multi-function capability
US20060042795A1 (en) * 2004-08-24 2006-03-02 Richards William M Sand control screen assembly having fluid loss control capability and method for use of same
US20080283252A1 (en) * 2007-05-14 2008-11-20 Schlumberger Technology Corporation System and method for multi-zone well treatment
US20090090502A1 (en) * 2007-10-05 2009-04-09 Peter Lumbye Annulus sealing assembly

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9115573B2 (en) 2004-11-12 2015-08-25 Petrowell Limited Remote actuation of a downhole tool
US10262168B2 (en) 2007-05-09 2019-04-16 Weatherford Technology Holdings, Llc Antenna for use in a downhole tubular
US9359890B2 (en) 2007-10-19 2016-06-07 Petrowell Limited Method of and apparatus for completing a well
US9085954B2 (en) 2007-10-19 2015-07-21 Petrowell Limited Method of and apparatus for completing a well
US8833469B2 (en) 2007-10-19 2014-09-16 Petrowell Limited Method of and apparatus for completing a well
US9103197B2 (en) 2008-03-07 2015-08-11 Petrowell Limited Switching device for, and a method of switching, a downhole tool
US9631458B2 (en) 2008-03-07 2017-04-25 Petrowell Limited Switching device for, and a method of switching, a downhole tool
US9488046B2 (en) 2009-08-21 2016-11-08 Petrowell Limited Apparatus and method for downhole communication
RU2459934C1 (en) * 2011-04-26 2012-08-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Development method of multilayer non-homogeneous oil deposit
US9453374B2 (en) 2011-11-28 2016-09-27 Weatherford Uk Limited Torque limiting device
US10036211B2 (en) 2011-11-28 2018-07-31 Weatherford Uk Limited Torque limiting device
US20150027724A1 (en) * 2013-07-26 2015-01-29 Weatherford/Lamb, Inc. Electronically-Actuated, Multi-Set Straddle Borehole Treatment Apparatus
US10024133B2 (en) * 2013-07-26 2018-07-17 Weatherford Technology Holdings, Llc Electronically-actuated, multi-set straddle borehole treatment apparatus

Also Published As

Publication number Publication date
EP2446107B1 (en) 2013-07-24
DK178829B1 (en) 2017-03-06
US20120160524A1 (en) 2012-06-28
DK200900765A (en) 2010-12-23
BRPI1011754A2 (en) 2018-03-06
EP2446107A1 (en) 2012-05-02

Similar Documents

Publication Publication Date Title
EP2446107B1 (en) A completion assembly and a method for stimulating, segmenting and controlling erd wells
EP2446108B1 (en) A completion assembly for stimulating, segmenting and controlling erd wells
AU2007255227B2 (en) Methods and devices for treating multiple-interval well bores
CA2625662C (en) Methods and devices for treating multiple-interval well bores
US8276674B2 (en) Deploying an untethered object in a passageway of a well
US20110079390A1 (en) Cementing sub for annulus cementing
CA2952219C (en) Packer setting method using disintegrating plug
CA3078389A1 (en) Multi-zone perforate and treat system and method
US7128157B2 (en) Method and apparatus for treating a well
US11933132B1 (en) Frac plug and method of controlling fluid flow in plug and perforation systems

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: 10724097

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2010724097

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 13379865

Country of ref document: US

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: PI1011754

Country of ref document: BR

ENP Entry into the national phase

Ref document number: PI1011754

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20111222