CN116335585A - Water control fracturing valve and open hole horizontal well completion string - Google Patents
Water control fracturing valve and open hole horizontal well completion string Download PDFInfo
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- CN116335585A CN116335585A CN202111609689.4A CN202111609689A CN116335585A CN 116335585 A CN116335585 A CN 116335585A CN 202111609689 A CN202111609689 A CN 202111609689A CN 116335585 A CN116335585 A CN 116335585A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000007789 sealing Methods 0.000 claims description 31
- 230000008961 swelling Effects 0.000 claims description 8
- 210000000078 claw Anatomy 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 230000017488 activation-induced cell death of T cell Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 9
- 239000003129 oil well Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003032 molecular docking Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a water control fracturing valve and an open hole horizontal well completion string, wherein the water control fracturing valve comprises an outer barrel, a first connector and a second connector which are arranged at two ends of the outer barrel, a water control channel and a fracturing channel are integrated on the outer barrel, and the water control channel and the fracturing channel are alternately opened by sliding in the outer barrel through an inner sliding sleeve; the completion pipe string designed by the water control fracturing valve can realize small-displacement water control oil extraction, delay water output of an oil well and prolong the service life of the oil well; meanwhile, the transformation of the oil reservoir by the large displacement can be selectively realized. The method is applied to the actual process, and can meet the requirements of completion, fracturing and later water control of the open hole horizontal well.
Description
Technical Field
The invention belongs to the field of oilfield exploration drilling mechanical equipment, and particularly relates to a water control fracturing valve and an open hole horizontal well completion pipe column.
Background
For a bottom water reservoir, in order to prolong the development life of the reservoir, water control valves such as ICD\AICD and the like are often installed on open hole horizontal wells at home and abroad to control water in the oil well. An oil extraction water control valve provided by the patent number CN 212296308U is a novel water control valve developed on the basis of intelligent AICD. In the later development period of the oil reservoir, along with the reduction of the recovery ratio, the oil reservoir is often required to be subjected to acid fracturing/sand fracturing transformation. Although the ICD/AICD water control valve can meet the water control requirement, the water nozzle is smaller and has a complex structure, and the requirement of large discharge capacity on oil reservoir reconstruction cannot be met. However, the conventional well completion fracturing string has no water control function, so that development of an integrated string capable of simultaneously meeting two functions of water control oil extraction and fracturing transformation (acid fracturing and sand fracturing) is urgently needed.
Disclosure of Invention
The invention provides a water control fracturing valve and an open hole horizontal well completion string.
The invention relates to a water control fracturing valve, which comprises an outer cylinder, and a first connector and a second connector which are arranged at two ends of the outer cylinder;
the outer cylinder is provided with an automatic inflow control device at a position close to the first joint;
the outer cylinder is provided with a fracturing hole at a position close to the second joint;
the inner sleeve of the outer cylinder is provided with an inner sliding sleeve, and the inner sliding sleeve realizes the alternate opening of the automatic inflow control device and the fracturing hole when sliding between the first joint and the second joint along the axial direction.
Further, a limiting assembly is arranged between the inner sliding sleeve and the outer barrel and used for limiting the inner sliding sleeve to axially slide in the outer barrel;
the limiting component comprises a protruding part arranged on the outer wall of the inner sliding sleeve and a groove part arranged on the inner wall of the outer cylinder; the groove part comprises a first groove and a second groove;
when the protruding portion is matched with the first groove, the inner sliding sleeve is located at a first switch position: the fracturing aperture is open and the automatic inflow control device is closed;
when the protruding part is matched with the second groove, the inner sliding sleeve is positioned at a second switch position: the fracturing aperture is closed and the automatic inflow control device is open.
Further, the water control fracturing valve further comprises a sealing structure, wherein the sealing structure comprises: a first sealing ring arranged between the first joint and the outer cylinder, a second sealing ring arranged between the inner sliding sleeve and the outer cylinder, and a third sealing ring arranged between the second joint and the outer cylinder;
and/or at least two second sealing rings are arranged between the inner sliding sleeve and the outer cylinder, and the two second sealing rings are respectively sleeved at the two ends of the inner sliding sleeve.
Further, a connecting structure for connecting a switch tool is arranged on the inner wall of the inner sliding sleeve;
and/or a third annular groove is formed in the inner wall of the inner sliding sleeve and used for being connected with an elastic claw of the switch tool.
Further, the inner sliding sleeve is cylindrical, and the outer diameter of the inner sliding sleeve is matched with the inner diameter of the outer cylinder in size;
the inner diameters of the first connector and the second connector are smaller than the inner diameter of the outer cylinder.
Further, the automatic inflow control device is characterized in that a plurality of automatic inflow control devices are arranged at equal intervals along the circumferential direction of the cylinder wall of the outer cylinder and are communicated with the inside and the outside of the outer cylinder;
and/or the automatic inflow control device is a floating plate type AICD water control valve, and the water control valve is in threaded connection with the outer cylinder.
Further, the fracturing holes are arranged at equal intervals along the circumferential direction of the cylinder wall of the outer cylinder and are communicated with the inside and the outside of the outer cylinder, and the hole axis of each fracturing hole is perpendicular to the cylinder wall of the outer cylinder.
The invention also provides an open hole horizontal well completion string, which comprises the water control fracturing valve provided by the invention, wherein the water control fracturing valve is arranged below a well hole.
Further, a first packer is arranged between the water control fracturing valve and the well bore, and the first packer is an oil swelling packer or a water swelling packer.
Further, the hydraulic control fracturing valves are multiple, the hydraulic control fracturing valves are sequentially arranged at intervals along the axial direction, a second packer is arranged between the hydraulic control fracturing valves, and the second packer is an oil expansion packer or a water expansion packer.
The outer barrel of the water control fracturing valve is integrated with the water control channel and the fracturing channel, and the water control channel and the fracturing channel are alternately opened by sliding in the outer barrel through the inner sliding sleeve; the completion pipe string designed by the water control fracturing valve can realize small-displacement water control oil extraction, delay water output of an oil well and prolong the service life of the oil well; meanwhile, the transformation of the oil reservoir by the large displacement can be selectively realized. The method is applied to the actual process, and can meet the requirements of completion, fracturing and later water control of the open hole horizontal well.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic structural diagram of a water control fracturing valve according to an embodiment of the invention;
FIG. 2 shows a schematic diagram of the connection of a water control fracturing valve to a switching tool according to an embodiment of the invention;
FIG. 3 shows a schematic structural view of an open hole horizontal well completion string according to an embodiment of the present invention;
fig. 4 shows a tubular string with a switching tool according to an embodiment of the invention.
The main reference numerals in the drawings illustrate:
1. an outer cylinder; 2. a first joint; 3. a second joint; 4. an automatic inflow control device; 5. fracturing the hole; 6. an inner sliding sleeve; 7. a boss; 8. a groove portion; 81. a first groove; 82. a second groove; 9. a first seal ring; 10. a second seal ring; 11. a first annular groove; 12. a second annular groove; 13. a third seal ring; 14. a third annular groove; 15. a switch tool; 16. a first annular boss; 17. a second annular boss; 100. a water control fracturing valve;
21. a surface layer sleeve; 22. a technical sleeve; 23. docking the oil pipe; 24. a liner hanger; 25. a wellbore; 26. a first packer; 27. a second packer; 28. a float shoe; 200. a completion string;
31. a coiled tubing; 32. a third packer; 33. a constant pressure sliding sleeve; 34. a mechanical positioner; 35. the round head is led.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In consideration of the prior art, in the later development stage of a bottom water reservoir, along with the reduction of recovery ratio, the fracturing reformation needs to be carried out, the conventional water control valve is difficult to realize the requirement of large discharge capacity on reservoir reformation although the water control requirement can be met, and on the premise that the conventional well completion fracturing pipe column does not have water control capacity, the invention provides the water control fracturing valve and the open hole horizontal well completion pipe column, which integrate the water control fracturing function, are directly applied to the well completion pipe column, realize the well completion pipe column with the water control fracturing function, and are described by the embodiment below.
Embodiment one:
for the convenience of understanding the present embodiment, a detailed description will be given of a water control fracturing valve disclosed in the embodiment of the present application. Referring to fig. 1, a schematic structural diagram of a hydraulic control fracturing valve 100 according to an embodiment of the present invention includes an outer cylinder 1, and a first joint 2 and a second joint 3 disposed at two ends of the outer cylinder 1;
the outer cylinder 1 is provided with an automatic inflow control device 4 at a position close to the first joint 2;
the outer cylinder 1 is provided with a fracturing hole 5 at a position close to the second joint 3;
the inner sleeve of the outer cylinder 1 is provided with an inner sliding sleeve 6, and the inner sliding sleeve 6 realizes the alternate opening of the automatic inflow control device 4 and the fracturing hole 5 when sliding between the first joint 2 and the second joint 3 along the axial direction.
Wherein the fracturing holes 5 are used as injection channels (fracturing channels) of the fracturing fluid of the stratum; the automatic inflow control device 4 is used as a water control channel to realize the functions of water control and oil increase.
In the embodiment of the application, a limiting component is further arranged between the inner sliding sleeve 6 and the outer cylinder 1 and used for limiting the inner sliding sleeve 6 to axially slide in the outer cylinder 1;
the limiting component comprises a protruding part 7 arranged on the outer wall of the inner sliding sleeve 6 and a groove part 8 arranged on the inner wall of the outer barrel 1; the groove portion 8 includes a first groove 81 and a second groove 82;
when the boss 7 cooperates with the first recess 81, the inner slide 6 is in the first switch position: the fracturing aperture 5 is open and the automatic inflow control device 4 is closed;
when the boss 7 cooperates with the second recess 82, the inner slide 6 is in the second switch position: the fracturing aperture 5 is closed and the automatic inflow control device 4 is opened.
Referring to fig. 1, in the embodiment of the present application, the first groove 81 and the second groove 82 are located between the fracturing hole 5 and the automatic inflow control device 4, and when the inner sliding sleeve 6 slides toward the automatic inflow control device 4 until the protruding portion 7 is clamped into the first groove 81, the inner sliding sleeve 6 is limited at the first switch position, and at this time, the fracturing hole 5 is in an open state, and the automatic inflow control device 4 is closed by the inner sliding sleeve 6. When the inner sliding sleeve 6 slides towards the fracturing hole 5 until the protruding part 7 is clamped into the second groove 82, the inner sliding sleeve 6 is limited at the second switch position, at the moment, the fracturing hole 5 is blocked by the inner sliding sleeve 6, the fracturing hole 5 is closed, and the automatic inflow control device 4 is in an open state; the inner sleeve 6 is shown in figure 1 in the second switch position. It should be understood that the protruding portion 7 and the groove portion 8 cooperate to realize the limiting function of the inner sliding sleeve 6, and the shape of the protruding portion 7 may not be particularly required.
Optionally, the water control fracturing valve 100 further comprises a sealing structure comprising:
a first seal ring 9 provided between the first joint 2 and the outer tube 1; for avoiding leakage between the first joint 2 and the outer cylinder 1 and realizing sealing at the position of the first joint 2, as shown in fig. 1, in the embodiment of the application, the first joint 2 is provided with a first annular boss 16 at a position connected with the outer cylinder 1, the outer cylinder 1 is provided with a first annular groove 11 with a size matched with that of the first annular boss 16 at a first end part connected with the first joint 2, and optionally, the first annular boss 16 can be in threaded connection with the first annular groove 11; two first sealing rings 9 are arranged between the first annular boss 16 and the first annular groove 11, and the first sealing rings 9 are fixed on the outer wall of the first annular boss 16 in a clamping groove connection mode. The first seal ring 9 is an elastic member and deforms under stress to block the gap between the first annular boss 16 and the first annular groove 11, thereby realizing the seal between the first joint 2 and the outer cylinder 1.
A second seal ring 10 arranged between the inner slide sleeve 6 and the outer cylinder 1; in the embodiment of the application, three second sealing rings 10 are arranged between the inner sliding sleeve 6 and the outer barrel 1, wherein two second sealing rings 10 are respectively sleeved at two ends of the inner sliding sleeve 6, one second sealing ring 10 is arranged at the middle part of the inner sliding sleeve 6, the second sealing ring 10 is used for sealing the automatic inflow control device 4 when the inner sliding sleeve 6 is positioned at the first switch position, and the second sealing ring 10 is used for sealing the fracturing hole 5 when the inner sliding sleeve 6 is positioned at the second switch position.
A third seal ring 13 provided between the second joint 3 and the outer cylinder 1; for avoiding leakage between the second joint 3 and the outer cylinder 1 and realizing sealing at the position of the second joint 3, as shown in fig. 1, in the embodiment of the application, the second joint 3 is provided with a second annular boss 17 at the position connected with the outer cylinder 1, the outer cylinder 1 is provided with a second annular groove 12 with the size matched with the second annular boss 17 at the second end part connected with the second joint 3, and optionally, the second annular boss 17 can be in threaded connection with the second annular groove 12; two third sealing rings 13 are arranged between the second annular boss 17 and the second annular groove 12, and the third sealing rings 13 are fixed on the outer wall of the second annular boss 17 in a clamping groove connection mode. The third sealing ring 13 is an elastic member and deforms under the condition of stress to block the gap between the second annular boss 17 and the second annular groove 12, so that the sealing between the two joints and the outer cylinder 1 is realized.
The second sealing ring 10 and the third sealing ring 13 are also elastic members, and realize the plugging function by deformation under the condition of stress.
Specifically, a connection structure for connecting the switch tool 15 is provided on the inner wall of the inner sleeve 6; for being fixedly connected with the switch tool 15, so that the inner slide sleeve 6 axially slides in the outer barrel 1 under the operation of the switch tool 15. In the embodiment of the present application, the connection structure is a third annular groove 14, and the third annular groove 14 is formed on the inner wall of the inner sliding sleeve 6 and is used for connecting with an elastic claw of the switching tool 15.
As shown in fig. 2, a schematic connection diagram of the water control fracturing valve 100 and the switching tool 15 in the present application is shown, after a pipe column including the switching tool 15 extends into the water control fracturing valve 100, when the switching tool 15 is at the position of the third annular groove 14, an elastic claw extends into the third annular groove 14 and abuts against the inner wall of the third annular groove 14 after being opened, and when the switching tool 15 is operated to move axially, the inner sliding sleeve 6 can be driven to move axially; in fig. 2, the inner slide 6 is shown in the first switching position by the operation of the switching means 15.
In the embodiment of the application, the inner sliding sleeve 6 is in a cylinder shape, and the outer diameter of the inner sliding sleeve 6 is matched with the inner diameter of the outer cylinder 1 in size; the inner diameters of the first joint 2 and the second joint 3 are smaller than the inner diameter dimension of the outer cylinder 1. As shown in fig. 1 and 2, in the present embodiment, the first joint 2 and the second joint 3 have the same inner diameter as the inner diameter of the inner sleeve 6 at the position where the outer cylinder 1 is connected; since the inner sleeve 6 itself has a certain thickness, such dimensioning of the first joint 2 and the second joint 3 prevents the inner sleeve 6 from slipping out of the outer cylinder 1.
In the embodiment of the present application, there are a plurality of automatic inflow control devices 4, and the plurality of automatic inflow control devices 4 are arranged at equal intervals along the circumferential direction of the wall of the outer cylinder 1; it should be understood that the number and arrangement of the automatic inflow control devices 4 may be selected by those skilled in the art according to actual conditions such as actual reservoir conditions of the horizontal well.
Alternatively, the automatic inflow control device 4 is a floating-plate type AICD (Autonomous Inflow ControlDevice, automatic inflow control device) water control valve, and the floating-plate type AICD water control valve is in threaded connection with the outer cylinder 1.
In the embodiment of the application, a plurality of fracturing holes 5 are arranged at equal intervals along the circumference of the cylinder wall of the outer cylinder 1, and the hole axis of the fracturing holes 5 is perpendicular to the cylinder wall of the outer cylinder 1. It should be understood that the number and arrangement scheme of the fracturing holes 5 can be selected by those skilled in the art according to actual conditions such as actual reservoir conditions of the horizontal well, for example, multiple rows of fracturing holes 5 can be arranged as needed to further increase the total area of the fracturing holes 5.
In this embodiment, referring to fig. 1, two floating plate AICD water control valves and four fracturing holes 5 are provided on the water control fracturing valve 100.
Embodiment two:
based on the same technical concept, the embodiment of the application further provides an open hole horizontal well completion string, as shown in fig. 3, which is a schematic structural diagram of an open hole horizontal well completion string 200 according to an embodiment of the invention, including a surface casing 21, a technical casing 22, a docking oil pipe 23 and a liner hanger 24, wherein the surface casing 21 is sleeved outside the technical casing 22, and the technical casing 22 is sequentially connected with the docking oil pipe 23, the liner hanger 24 and a borehole 25 along an axial direction. In fig. 3, the technical sleeve 22 and the docking oil tube 23 are illustrated with a single vertical line.
Also included is a water control frac valve 100 of the present invention, the water control frac valve 100 being disposed below the wellbore 25. At the end of completion string 200 is provided a shoe 28.
The first joint 2 of the water control fracturing valve 100 is distributed towards the direction of the borehole 25, and a first packer 26 is arranged between the water control fracturing valve 100 and the borehole 25, and the first packer 26 is an oil swelling packer or a water swelling packer.
Optionally, the plurality of the water control fracturing valves 100 are arranged, the plurality of the water control fracturing valves 100 are sequentially spaced apart along the axial direction, a second packer 27 is arranged between the plurality of the water control fracturing valves 100, and the second packer 27 is an oil swelling packer or a water swelling packer.
The oil expansion/water expansion packer in the embodiment has strong adaptability to the well bore, the packer is automatically set when being inflated by oil/water, the setting is not required to be pressed, the setting is safe and reliable, and the sand clamping problem of the packer is effectively solved.
It should be appreciated that the number of the water control fracturing valves 100 is selected, and those skilled in the art can determine the number according to the actual situation. Referring to fig. 3, in the embodiment of the present application, four water control fracturing valves 100 are sequentially arranged along the pipe column axis direction of the horizontal well. The main body part of the well completion pipe column 200 is formed by a hydraulic control fracturing valve and an oil expansion/water expansion packer, and in practice, selective layered water control and fracturing can be realized through a switching tool, so that small-discharge water control oil extraction can be realized, the water output of an oil well is delayed, and the service life of the oil well is prolonged; meanwhile, the oil reservoir can be selectively transformed by large displacement, the two functional integrated designs of water control oil extraction and oil reservoir transformation are realized, and the oil extraction efficiency is greatly improved. The well completion pipe string is simple in structure and safe to put into, can reduce operation cost and construction risk, and prolongs the service life of an oil well.
The completion process flow of the open hole horizontal well completion string based on the second embodiment of the invention is as follows:
firstly, cement cementing a surface casing and a technical casing in the well drilling and completion process;
then, connecting a drilling string (a drill rod) and a water control fracturing integrated string (namely a main body part of a well completion string in the second embodiment of the invention) together, sending the string into a horizontal open hole section, and hanging a tail pipe hanger at the upper part of the water control fracturing integrated string in an upper technical casing;
finally, the wellhead is connected with a pumping pipeline, the casing annulus drilling mud is replaced by positive circulation, then ball casting is carried out to suppress pressure, and the tail pipe is released. And tripping the upper drill rod from the tail pipe hanging seal part to take out.
The fracturing process flow of the open hole horizontal well completion string based on the second embodiment of the invention is as follows (the oil reservoir fracturing is performed after completion is illustrated as an example):
(1) Completion: if the fracturing after completion is selected, when the water control fracturing valve is in a well descending state, the inner sliding sleeve of the water control fracturing valve is set to be in a first switch position, namely, the water control valve enters a stratum channel through the AICD to be in a closed state.
(2) Fracturing: after completion, referring to fig. 3, the run-in docking oil pipe is docked with the liner hanger and then run in the string with the switching tool. The first water control fracturing valve (the first water control fracturing valve near the wellbore) was found. Pumping pressure at a wellhead, setting a packer, opening a constant pressure sliding sleeve, and pumping fracturing fluid to realize fracturing of the section. The water control fracturing valves of other layers can adopt the same scheme to carry out fracturing operation.
(3) Water control and oil increase: and (2) immediately after the fracturing is finished, lowering a tubular column with a switching tool into the well completion tubular column, sequentially lifting the tubular column with the switching tool from the outermost end, enabling the inner sliding sleeve in each water control fracturing valve to a second switching position, closing the fracturing channel (fracturing hole 5), and simultaneously opening the water control channel (AICD water control valve), thereby finishing the opening of the water control channels of each layer of water control fracturing valves.
According to another preferred embodiment of the invention, if the lower well water control fracturing valve is in a water control oil extraction state (namely the fracturing channel is closed and the inner sliding sleeve is positioned at the first switch position) during the initial completion of the pipe column, the coiled tubing with a switch tool can be lowered to realize reservoir reformation of each section when acid fracturing or sand fracturing is needed to be carried out on an oil layer in the later period of oil extraction. Fig. 4 shows a tubing string with a switching tool according to an embodiment of the invention, as shown in fig. 4, the body part of the tubing string with the switching tool comprising a coiled tubing 31, a third packer 32, a constant pressure sliding sleeve 33, a switching tool 15, a mechanical locator 34 and a bullnose 35 connected in sequence.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The water control fracturing valve (100) is characterized by comprising an outer cylinder (1), and a first connector (2) and a second connector (3) which are arranged at two ends of the outer cylinder (1);
an automatic inflow control device (4) is arranged at a position, close to the first joint (2), of the outer cylinder (1);
the outer cylinder (1) is provided with a fracturing hole (5) at a position close to the second joint (3);
the inner sleeve of the outer cylinder (1) is provided with an inner sliding sleeve (6), and the inner sliding sleeve (6) realizes the alternate opening of the automatic inflow control device (4) and the fracturing hole (5) when sliding between the first joint (2) and the second joint (3) along the axial direction.
2. The water control fracturing valve (100) according to claim 1, characterized in that a limiting assembly is further arranged between the inner sliding sleeve (6) and the outer cylinder (1) for limiting the inner sliding sleeve (6) to axially slide in the outer cylinder (1);
the limiting assembly comprises a protruding part (7) arranged on the outer wall of the inner sliding sleeve (6) and a groove part (8) arranged on the inner wall of the outer cylinder (1); the groove portion (8) includes a first groove (81) and a second groove (82);
when the protruding part (7) is matched with the first groove (81), the inner sliding sleeve (6) is positioned at a first switch position: the fracturing aperture (5) is open and the automatic inflow control device (4) is closed;
when the protruding part (7) is matched with the second groove (82), the inner sliding sleeve (6) is positioned at a second switch position: the fracturing aperture (5) is closed and the automatic inflow control device (4) is opened.
3. The water control fracturing valve (100) according to claim 1, wherein the water control fracturing valve (100) further comprises a sealing structure comprising: a first sealing ring (9) arranged between the first joint (2) and the outer cylinder (1), a second sealing ring (10) arranged between the inner sliding sleeve (6) and the outer cylinder (1), and a third sealing ring (13) arranged between the second joint (3) and the outer cylinder (1);
and/or at least two second sealing rings (10) are arranged between the inner sliding sleeve (6) and the outer cylinder (1), and the two second sealing rings (10) are respectively sleeved at two ends of the inner sliding sleeve (6).
4. The water control fracturing valve (100) according to claim 1, characterized in that on the inner wall of the inner sliding sleeve (6) there is provided a connection structure for connecting a switching tool (15);
and/or a third annular groove (14) is formed in the inner wall of the inner sliding sleeve (6) and is used for connecting an elastic claw of the switch tool (15).
5. The water control fracturing valve (100) according to claim 1, characterized in that said inner sleeve (6) is tubular, the outer diameter of said inner sleeve (6) being matched in size to the inner diameter of said outer cylinder (1);
the inner diameters of the first connector (2) and the second connector (3) are smaller than the inner diameter of the outer cylinder (1).
6. The water control fracturing valve (100) according to any one of claims 1 to 5, wherein a plurality of automatic inflow control devices (4) are provided, which are equally spaced circumferentially along the cylinder wall of the outer cylinder (1) and communicate the inside and outside of the outer cylinder (1);
and/or the automatic inflow control device (4) is a floating plate type AICD water control valve, and the water control valve is in threaded connection with the outer cylinder (1).
7. The water control fracturing valve (100) according to any of claims 1 to 5, wherein a plurality of fracturing holes (5) are arranged at equal intervals along the circumference of the cylinder wall of the outer cylinder (1) and are communicated with the inside and the outside of the outer cylinder (1), and the hole axis of the fracturing holes (5) is perpendicular to the cylinder wall of the outer cylinder (1).
8. An open hole horizontal well completion string comprising the water control fracturing valve of any one of claims 1 to 7 disposed below a wellbore.
9. An open hole horizontal well completion string according to claim 8, wherein a first packer (26) is provided between the water control fracturing valve and the wellbore, the first packer (26) being an oil-swellable packer or a water-swellable packer.
10. An open hole horizontal well completion string according to claim 8 or 9, wherein a plurality of water control fracturing valves are arranged at intervals in sequence along the axial direction, a second packer (27) is arranged between the water control fracturing valves, and the second packer (27) is an oil swelling packer or a water swelling packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609689.4A CN116335585A (en) | 2021-12-24 | 2021-12-24 | Water control fracturing valve and open hole horizontal well completion string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609689.4A CN116335585A (en) | 2021-12-24 | 2021-12-24 | Water control fracturing valve and open hole horizontal well completion string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116335585A true CN116335585A (en) | 2023-06-27 |
Family
ID=86879565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111609689.4A Pending CN116335585A (en) | 2021-12-24 | 2021-12-24 | Water control fracturing valve and open hole horizontal well completion string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116335585A (en) |
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2021
- 2021-12-24 CN CN202111609689.4A patent/CN116335585A/en active Pending
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