CN108999590B - Profile control tool, separate injection profile control integrated pipe column and process - Google Patents
Profile control tool, separate injection profile control integrated pipe column and process Download PDFInfo
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- CN108999590B CN108999590B CN201710418524.6A CN201710418524A CN108999590B CN 108999590 B CN108999590 B CN 108999590B CN 201710418524 A CN201710418524 A CN 201710418524A CN 108999590 B CN108999590 B CN 108999590B
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- 238000002347 injection Methods 0.000 title claims abstract description 115
- 239000007924 injection Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 130
- 239000007788 liquid Substances 0.000 claims abstract description 104
- 239000012530 fluid Substances 0.000 claims abstract description 69
- 210000000078 claw Anatomy 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
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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
- 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
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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Abstract
The invention discloses a profile control tool, a separate injection profile control integrated tubular column and a process. The profile control device comprises an outer cylinder and an inner cylinder, wherein the inner cylinder is positioned in the outer cylinder and can move along the axial direction of the outer cylinder; the walls of the outer cylinder and the inner cylinder are respectively provided with a first profile control liquid channel and a second profile control liquid channel; the profile control core comprises a valve body; the upper part and the middle part of the valve body are respectively provided with a third profile control liquid channel and a fourth profile control liquid channel; in the initial state, the first profile control liquid channel and the second profile control liquid channel are in a staggered state; when the valve body enters the inner cylinder from bottom to top and profile control liquid enters the valve body, the inner cylinder can move downwards to enable the first profile control liquid channel, the second profile control liquid channel and the fourth profile control liquid channel to be communicated; when the profile control operation is finished, the first profile control fluid channel and the second profile control fluid channel can be restored to a state of being staggered with each other. The profile control device is arranged in the separated-layer water injection pipe column and is matched with the profile control core to realize the conversion of water injection operation and profile control operation under the condition of not moving the pipe column.
Description
Technical Field
The invention relates to the technical field of oil extraction engineering, in particular to a profile control tool, a separate injection profile control integrated tubular column and a process.
Background
At present, most oil fields in China enter the middle and later stages of exploitation, and stratified water injection through a water injection well becomes an exploitation technology commonly adopted by most oil fields. The profile control of the water injection well is an effective measure for improving the yield of the oil field. In the profile control, profile control liquid is injected into a stratum through a water injection well to block a high permeable layer, so that the water absorption profile of the water injection well is adjusted, and the sweep coefficient of injected water is improved, so that the yield is improved.
In the prior art, when the water injection well is required to be profile-controlled, the pressure of the water injection well is firstly released, an original layered water injection pipe column is lifted, the profile control pipe column is put in, after the profile control construction is finished, the pressure of the water injection well is released, the profile control pipe column is lifted out, and the layered water injection pipe column is put in again to recover water injection. The profile control pipe column comprises an oil pipe and a packer, and profile control liquid enters a stratum by directly opening a hole on the oil pipe.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: in the prior art, different pipe columns are needed for layered water injection and profile control, the pipe columns need to be pulled out and pulled down for many times, the workload is large, the construction cost is high, and the construction time is long. And before the string is pulled out, the pressure of the water injection well needs to be relieved, profile control fluid is easily returned to the shaft in the pressure relief process of the water injection well, and the profile control effect is influenced.
Disclosure of Invention
In order to solve the technical problems, embodiments of the present invention provide a profile control tool, and a separate injection and profile control integrated tubular column and a process based on the profile control tool, which integrate separate layer water injection and profile control functions.
Specifically, the method comprises the following technical scheme:
in a first aspect, an embodiment of the present invention provides a profile control tool, where the profile control tool includes: comprises a profile control device and a profile control core;
the profile control ware includes:
the outer cylinder and the inner cylinder are positioned in the outer cylinder and can move along the axial direction of the outer cylinder;
the walls of the outer barrel and the inner barrel are respectively provided with a first profile control liquid channel and a second profile control liquid channel;
the profile control core includes: a valve body having a central bore;
the upper part and the middle part of the valve body are respectively provided with a third profile control liquid channel and a fourth profile control liquid channel;
the valve body can enter the inner cylinder and drive the inner cylinder to move along the axial direction of the outer cylinder, and a gap which can enable profile control liquid to enter the valve body through the third profile control liquid channel is formed between the outer wall of the valve body and the inner wall of the upper part of the inner cylinder;
in an initial state, the first profile control fluid channel and the second profile control fluid channel are in a staggered state;
in the process of profile control operation, when the valve body enters the inner cylinder from bottom to top and the profile control liquid enters the valve body, the inner cylinder can move downwards to enable the first profile control liquid channel, the second profile control liquid channel and the fourth profile control liquid channel to be communicated;
when the profile control operation is finished, the first profile control fluid channel and the second profile control fluid channel can be restored to a state of being staggered with each other.
Further, the profile control device further comprises: the upper joint and the lower joint are respectively fixedly connected with the upper end and the lower end of the outer cylinder, the spring seat is fixedly connected with the lower end of the inner cylinder, and a first spring, the two ends of which are respectively fixedly connected with the spring seat and the lower joint, is provided with a supporting step on the inner wall of the spring seat; the profile control core further comprises: and the supporting seat is fixed at the lower end of the valve body and seals the lower end of the valve body. The supporting claw is positioned outside the valve body and connected with the supporting seat and can be expanded and contracted; when the valve body enters the inner cylinder from bottom to top, the end part of the supporting claw moves to the position of the supporting step, and the supporting claw can be opened and is propped against the supporting step.
Further, the profile control core further comprises: the valve ball is positioned in the valve body and can move along the axial direction of the valve body, the valve ball seat is positioned in the valve body and used for supporting the valve ball, and the two ends of the second spring are respectively fixedly connected with the supporting seat and the valve ball seat; the valve ball may close the fourth profile control fluid passageway.
Further, the profile control core further comprises: the upper connector is arranged at the upper end of the valve body, the guide head with a hollow structure is arranged at the lower end of the support seat, and an opening for the support claw to pass through is formed in the side wall of the guide head.
Furthermore, the positions of the upper side and the lower side of the fourth profile control liquid channel on the outer wall of the valve body are respectively provided with an upper sealing ring and a lower sealing ring.
In a second aspect, an embodiment of the present invention provides an injection and profile control integrated tubular column, where the injection and profile control integrated tubular column is disposed in a casing, and includes: at least one section of water injection profile control tubular column;
the water injection profile control tubular column comprises a water distributor and a profile control device in the profile control tool, which are connected through at least one oil pipe;
and in the lowermost water injection profile control pipe column, the profile control device is positioned above the water distributor.
Further, the integrated tubular column of profile control of dividing still includes: and the packer is positioned above the water injection profile control pipe column and between the two adjacent sections of the water injection profile control pipe columns.
Further, the integrated tubular column of profile control of dividing still includes: and the check valve, the sieve tube and the plug are positioned below the water injection profile control tubular column at the lowest part.
Further, the water distributor is a concentric water distributor or an eccentric water distributor.
In a third aspect, an embodiment of the present invention provides an integrated injection and profile control process, where the integrated injection and profile control process is implemented by the integrated injection and profile control column described above, and includes the following steps:
a, a water injection measuring and regulating instrument is put in to close the water distributors except the water distributor positioned at the lowest part;
b, delivering a profile control core below a profile control device, lifting the profile control core, enabling the profile control core to enter an inner cylinder of the profile control device from bottom to top, and enabling a fourth profile control liquid channel of the profile control core, a first profile control liquid channel of the profile control device and a second profile control liquid channel of the profile control device to be communicated;
c, injecting profile control liquid to enable the profile control liquid to be communicated with and enter the stratum through a fourth profile control liquid channel of the profile control core, a first profile control liquid channel of the profile control device and a second profile control liquid channel;
d, after the injection of the profile control liquid is finished, fishing out the profile control core from the ground, finishing the profile control operation and recovering the water injection operation.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
the profile control device in the profile control tool provided by the embodiment of the invention is connected with a water distributor in a separated layer water injection pipe column through an oil pipe. During water injection operation, the first profile control liquid channel and the second profile control liquid channel on the outer cylinder and the inner cylinder in the profile control device are staggered with each other in the initial state, so injected water can directly pass through the profile control device and is sprayed out from a water nozzle of the water distributor to enter a stratum, and normal water injection operation cannot be influenced. When the profile control operation is required, the water distributor is closed (the lowest water distributor is not closed and is kept in an open state), the profile control core is put into the underground by utilizing the delivery equipment, and the profile control core enters an inner cylinder of the profile control device from bottom to top. And then profile control liquid is injected into the oil pipe, the profile control liquid enters the inner cylinder and then enters the valve body through a third profile control liquid channel positioned on the upper part of the valve body, and under the action of profile control liquid pressure, the inner cylinder moves downwards to enable a first profile control liquid channel on the outer cylinder, a second profile control liquid channel on the inner cylinder and a fourth profile control liquid channel on the valve body to be communicated, so that the profile control liquid flows out to enter the annular space of the oil sleeve and then enters the stratum. After the profile control operation is finished, the profile control core is lifted continuously, so that the first profile control liquid channel and the second profile control liquid channel are restored to the staggered state. And then the water injection operation is resumed.
Therefore, the profile control tool provided by the embodiment of the invention can obtain a separate injection profile control integrated tubular column integrating separate injection and profile control functions, realizes the conversion of water injection operation and profile control operation under the condition of no moving of the tubular column, avoids the repeated tripping of the tubular column, reduces the workload, reduces the construction cost and shortens the construction time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural diagram of a profile control tool provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a profile control device in a profile control tool according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a profile control core in a profile control tool according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a dispensing profile control integrated column according to an embodiment of the present invention.
The reference numerals in the drawings denote:
1-a packer;
2-a profile control device;
21-an upper joint of the profile control device;
22-an outer cylinder;
220-a first profile control fluid channel;
23-inner cylinder;
230-a second profile control fluid channel;
231-inner rail groove;
232-positioning grooves;
24-a set screw;
25-spring seats;
251-a support step;
26-a first spring;
27-lower joint of profile control device;
3-water distributor;
4-a check valve;
5-sieve tube;
6-plugging;
7-profile control core;
71-upper joint of profile control core;
72-a valve body;
720-a third profile control fluid channel;
721-upper sealing ring;
722-lower sealing ring;
723-fourth profile control fluid channel;
73-valve ball;
74-a valve seat;
75-a second spring;
76-support jaw;
77-a guide head;
78-a support seat;
and x-water injection profile control tubular column.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings. Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
In a first aspect, embodiments of the present invention provide a profile tool, see fig. 1, 2 and 3, comprising a profile control unit 2 and a profile control core 7.
Wherein, profile control ware 2 includes: an outer cylinder 22, and an inner cylinder 23 which is positioned inside the outer cylinder 22 and is movable in the axial direction of the outer cylinder 22.
The walls of the outer cylinder 22 and the inner cylinder 23 are respectively provided with a first profile control liquid channel 220 and a second profile control liquid channel 230.
The profile control core 7 includes: a valve body 72 having a central bore. The upper and middle portions of the valve body 72 are provided with a third profile control fluid passage 720 and a fourth profile control fluid passage 723, respectively.
The valve body 72 can enter the inner cylinder 23 and drive the inner cylinder 23 to move along the axial direction of the outer cylinder 22, and a gap which can enable the profile control liquid to enter the interior of the valve body 72 through the third profile control liquid channel 720 is formed between the outer wall of the valve body 72 and the inner wall of the upper part of the inner cylinder 23.
In the initial state, the first and second profile control fluid passages 220 and 230 are in a state of being staggered from each other;
in the process of profile control operation, when the valve body 72 enters the inner cylinder 23 from bottom to top and profile control liquid enters the valve body 72, the inner cylinder 23 can move downwards to enable the first profile control liquid channel 220, the second profile control liquid channel 230 and the fourth profile control liquid channel 723 to be communicated;
when the profile operation is finished, the first and second profile fluid passages 220 and 230 may be restored to a state of being staggered from each other.
The profile control tool provided by the embodiment of the invention comprises a profile control device 2 which is provided with a profile control liquid channel and is used for being installed in a water injection string to enable profile control liquid to enter a stratum, and a profile control core 7 which is matched with the profile control device 2 and is used for controlling the opening and closing of the profile control liquid channel in the profile control device 2. When in use, the profile control device is connected with a water distributor in the separated layer water injection pipe column through an oil pipe. The working principle of the profile control tool provided by the embodiment of the invention is as follows:
the inner cylinder 23 of the profile control device 2 is movable in the axial direction of the outer cylinder 22, and in the initial state, the first profile control fluid passage 220 of the outer cylinder 22 and the second profile control fluid passage 230 of the inner cylinder 230 are offset from each other, and the profile control fluid passages are in the closed state. When the valve body 72 of the profile control core 7 enters the inner cylinder 23, a gap which can lead the profile control liquid to enter the valve body 72 through the third profile control liquid channel 720 is arranged between the outer wall of the valve body 72 and the inner wall of the upper part of the inner cylinder 23, and the outer wall of the valve body 72 and the outer wall of the rest part of the inner cylinder 23 are sealed, so that the profile control fluid enters the valve body 72 of the profile control core 7 through the gap after being input from the wellhead, and at the moment, under the action of the pressure of the profile control fluid, the inner cylinder 23 moves downward, so that the first profile control fluid passage 220 of the outer cylinder 22 of the profile control unit 2, the second profile control fluid passage 230 of the inner cylinder 23 and the fourth profile control fluid passage 723 of the valve body 72 of the profile control core 7 are communicated, therefore, profile control fluid enters the annular space of the oil sleeve after passing through the fourth profile control fluid channel 723, the second profile control fluid channel 230 and the first profile control fluid channel 220 from the valve body 72, and then enters the stratum through the perforation on the sleeve for profile control.
After the profile control operation is finished, the profile control core 7 is lifted up, and at the moment, the first profile control liquid channel 220 and the second profile control liquid channel 230 are restored to the staggered state, so that the profile control liquid channels are closed, and after the water injection operation is restored, injected water directly enters the stratum from a water distributor in a water injection pipe column through the profile control device when flowing through the profile control device 2, and the normal water injection operation is not influenced.
Therefore, the profile control tool provided by the embodiment of the invention can obtain a separate injection profile control integrated tubular column integrating separate injection and profile control functions, realizes the conversion of water injection operation and profile control operation under the condition of no moving of the tubular column, avoids the repeated tripping of the tubular column, reduces the workload, reduces the construction cost and shortens the construction time.
In the embodiment of the present invention, the diameters of the first, second, and fourth profile control fluid passages 220, 230, 723 are not strictly limited, but the shear loss of the profile control fluid when the profile control fluid passes through the profile control fluid passages is minimized to ensure the profile control effect.
In the water injection pipe column, according to the relevant industry standard, the inner diameter of the central hole of the water distributor is larger than or equal to 46 mm, so that the inner diameter of the inner cylinder 23 of the profile control device 2 is also designed to be larger than or equal to 46 mm in order to not affect normal pressurizing, measuring and adjusting and water injection.
Further, referring to fig. 1 and 2, the profile control apparatus 2 further includes: an upper joint 21 and a lower joint 27 fixedly connected with the upper end and the lower end of the outer cylinder 22, respectively, a spring seat 25 fixedly connected with the lower end of the inner cylinder 23, and a first spring 26 fixedly connected with the spring seat 25 and the lower joint 27, respectively, at the two ends; the inner wall of the spring seat 25 is provided with a support step 251.
Referring to fig. 1 and 3, the profile control core 7 further includes: and a support seat 78 fixed to the lower end of the valve body 72 and closing the lower end of the valve body 72. And an expandable and contractible support claw 76 located outside the valve body 72 and connected to a support seat 78; when the end of the support claw 76 moves to the position of the support step 251 during the valve body 72 enters the inner cylinder 23 from the bottom up, the support claw 76 can be opened and abutted against the support step 251.
Wherein, in the profile control device 2, an upper joint 21 and a lower joint 27 which are respectively fixedly connected with the upper end and the lower end of an outer cylinder 22 are used for being connected with an oil pipe, so that the profile control device 2 is integrally connected into a water injection pipe column. Wherein, the upper end of the upper joint 21 is processed with an internal thread, and the lower end is processed with an external thread. The lower joint 27 has an external thread formed at its upper end and an internal thread formed at its lower end.
Meanwhile, because the lower end of the inner cylinder of the profile control device 2 is fixedly connected with the spring seat 25, and the inner wall of the spring seat 25 is provided with the supporting step 251, when the supporting claw at the lower end of the valve body 72 is opened and abuts against the supporting step 251, the valve body 72 moves downward, and then the inner cylinder 23 is driven to move downward. Based on this, since the lower end of the valve body 72 is closed by the support seat 78, when the profile control fluid enters the valve body 72, the valve body 72 is pushed to move downward, so as to push the inner cylinder 23 to move downward, and when the inner cylinder 23 moves downward to a predetermined position, the second profile control fluid channel 230 of the inner cylinder 23 communicates with the first profile control fluid channel 220 of the outer cylinder 22, so as to open the profile control fluid channel.
The first spring 26 arranged between the spring seat 25 and the lower joint 27 of the profile control device 2 is compressed in the downward movement process of the inner cylinder 23, after the profile control liquid in the valve body 72 is completely injected into the stratum, the first spring 26 recovers deformation due to the absence of the action of the liquid pressure, so that the inner cylinder 23 is pushed to move upwards, the second profile control liquid channel 230 of the inner cylinder 23 and the second profile control liquid channel 220 of the outer cylinder 22 recover to the staggered state, the profile control liquid channels are closed, and the injected water is prevented from entering the stratum through the profile control device 2 during water injection operation.
Here, it should be noted that, after the support claws 76 at the lower end of the valve body 72 are opened and abut against the support step 251, the fourth profile control liquid passage 723 should be brought into communication with the second profile control liquid passage 230 so that the fourth profile control liquid passage 723, the second profile control liquid passage 230, and the first profile control liquid passage 220 are brought into communication after the valve body 72 and the inner cylinder 23 are moved down to the preset positions.
The supporting claw 76 may specifically include a plurality of spring pieces, such as four spring pieces, each of which is a set and is connected to the supporting seat 78 through a pin. It will be understood by those skilled in the art that the spring seat 25 has a hollow cylindrical shape, and is provided with a stepped hole therein, and the inner diameter of the upper end is greater than that of the lower end, forming the above-mentioned supporting step 251 where the inner diameter varies. The support claw 76 is in a contracted state when it does not reach the position of the support step 251. The spring seat 25 and the inner cylinder 23 may be connected by welding or by screwing. A catching groove may be provided on a lower end surface of the spring seat 25 and an upper end surface of the lower joint 27, respectively, to fix the first spring 26.
Further, referring to fig. 1 and 3, the profile control core 7 further includes: a valve ball 73 located inside the valve body 72 and movable in the axial direction of the valve body 72, a valve ball seat 74 located inside the valve body 72 for supporting the valve ball 73, and a second spring 75 having both ends fixedly connected to the support seat 78 and the valve ball seat 74, respectively; the valve ball 73 may close the fourth profile control fluid passageway 723.
In the initial state, the valve ball 73 closes the fourth profile fluid passage 723 under the support of the valve ball seat 74 and the second spring 75. When the profile control fluid enters the valve body 72, the valve ball 73 is moved downward by the pressure of the profile control fluid, and the fourth profile control fluid passage 723 is opened. The second spring 75 is compressed in the process. After the profile control fluid in the valve body 72 completely enters the ground, the second spring 75 will rebound due to the absence of the action of the fluid pressure, and the fourth profile control fluid channel 723 is closed again, so that the profile control fluid is effectively prevented from being re-discharged.
Further, referring to fig. 1 and 3, the profile control core 7 further includes: an upper joint 71 arranged at the upper end of the valve body 72, and a guide head 77 with a hollow structure arranged at the lower end of the support seat 78, wherein an opening for passing the support claw 76 is arranged on the side wall of the guide head 77.
The upper joint 71 at the upper end of the valve body 72 is used for connecting with the profile control core delivery equipment, thereby realizing the lifting and lowering of the profile control core 7. The upper joint 71 may be externally threaded. The guide head 77 guides the profile control core 7 during the lifting and lowering process. The support seat 78 and the valve body 72 can be connected by welding, and the guide head 77 and the support seat 78 can be designed as an integral structure. A catching groove may be provided on an upper end surface of the supporting seat 78 and a lower end surface of the valve ball seat 73, respectively, to fix the second spring 75.
Further, referring to fig. 1 and 3, in the profile control core 7, an upper seal 721 and a lower seal 722 are provided on the outer wall of the valve body 72 at positions on both upper and lower sides of the fourth profile control liquid passage 723, respectively. To ensure a seal between the valve body 72 and the inner cylinder 23 so that the profile control fluid can only enter the interior of the valve body 72 from the third profile control fluid passage 720 located at the upper end of the valve body 72.
Further, referring to fig. 1 and 2, an inner rail groove 231 is further provided inside the wall of the inner cylinder 23 along the axial direction of the inner cylinder; a positioning groove 232 is further arranged on the outer side of the cylinder wall of the inner cylinder 23 along the axial direction of the inner cylinder, and a positioning screw 24 is further arranged in the positioning groove 232, wherein the axial direction of the positioning screw is perpendicular to the axial direction of the inner cylinder 23, so that the relative rotation between the inner cylinder 23 and the outer cylinder 22 is prevented, and the inner cylinder 23 can only move along the axial direction of the outer cylinder 22.
In a second aspect, an embodiment of the present invention provides an injection and profile control integrated tubular column, referring to fig. 4, the injection and profile control integrated tubular column is disposed in a casing, and includes: and at least one section of water injection profile control tubular column x.
Wherein, the water injection profile control tubular column x comprises a water distributor 3 and a profile control device 2 in the profile control tool which are connected through at least one oil pipe. And in the lowermost water injection profile control string x, the profile control device 2 is located above the water distributor 3.
Based on the working principle of the profile control tool, the profile control device 2 in the profile control tool is connected with the water distributor 3 through an oil pipe in the embodiment of the invention, wherein in the lowest water injection profile control pipe column x, the profile control device 2 is positioned above the water distributor 3, and for other water injection profile control pipe columns x, the profile control device 2 can be positioned above the water distributor 3 or below the water distributor 3.
During normal water injection operation, the profile control device 2 is supported by the first spring 26, the first profile control fluid channel 220 on the outer cylinder 22 and the second profile control fluid channel 230 on the inner cylinder 23 are staggered, and injected water directly passes through the profile control device 2 and is sprayed out of the water distributor 3 into the stratum.
When profile control operation is required, a water injection measuring and adjusting instrument is put into the pipe column, and the water distributors except the water distributor positioned at the lowest position are closed. Then, the profile control core 7 is delivered to the lower part of the profile control device 2 corresponding to the stratum to be profile controlled, then the profile control core 7 is slowly lifted up, so that the profile control core 7 enters the profile control device 2 from bottom to top, when the supporting claw 76 of the profile control core 7 moves to the supporting step 251 of the spring seat 25 of the profile control device 2, the supporting claw 76 is ejected to abut against the supporting step 251, and the profile control core 7 is fixed in the profile control device 2. Then, profile control liquid is injected into the column, the profile control liquid enters the valve body 72 through a third profile control liquid channel 720 of the valve body 72 of the profile control core 7, the valve ball 73 moves downwards under the action of profile control hydraulic pressure to compress the second spring 75, meanwhile, the valve body 72 pushes the inner cylinder 23 to move downwards to compress the first spring 26, so that a fourth profile control liquid channel 723 on the valve body 72, a second profile control liquid channel 230 on the inner cylinder 23 and a third profile control liquid channel 220 on the outer cylinder 22 are communicated, and the profile control liquid enters the stratum. When all the profile control fluid in the valve body 72 enters the ground, the valve ball 73 moves upward under the action of the second spring 75 to close the fourth profile control fluid passage 723, and at the same time, the inner cylinder 23 moves upward under the action of the first spring 26 to restore the second profile control fluid passage 220 and the first profile control fluid passage 230 to a state of being staggered with each other. And lifting the profile control core 7 to move the profile control core 7 out of the profile control device 2, and finishing the profile control operation of the current oil layer. And repeating the steps to finish the profile control operation of other oil layers. And then, a testing and adjusting instrument is put into the pipe column to open the water distributor, so that normal water injection operation can be recovered.
Therefore, the separated injection profile control integrated pipe column provided by the embodiment of the invention can realize the conversion of water injection operation and profile control operation under the condition of no movement of the pipe column, avoid repeated pipe column tripping, reduce the workload, reduce the construction cost and shorten the construction time. And can guarantee water injection effect and profile control effect.
Further, referring to fig. 4, the dispensing profile control integrated tubular column provided in the embodiment of the present invention further includes: the packer 1 is positioned above the uppermost water injection profile control pipe column x and between two adjacent sections of water injection profile control pipe columns x, and the check valve 4, the sieve pipe 5 and the plug 6 are positioned below the lowermost water injection profile control pipe column x.
In the separated injection profile control integrated tubular column provided by the embodiment of the invention, all parts are connected through oil pipes.
The water distributor 3 can be a concentric water distributor or an eccentric water distributor, and the inner diameter of the central hole of the water distributor is larger than or equal to 46 mm. The types and specifications of the packer 1, the check valve 4, the sieve tube 5 and the plug 6 are not particularly limited in the embodiment of the invention, and the types and specifications commonly used in the field can be all adopted.
In a third aspect, an embodiment of the present invention provides an integrated injection and profile control process, where the integrated injection and profile control process is implemented by the integrated injection and profile control column described above, and includes the following steps:
a, a water injection measuring and regulating instrument is put in to close the water distributors except the water distributor positioned at the lowest part;
b, delivering the profile control core 7 to the lower part of the profile control device 5, then lifting the profile control core 7, enabling the profile control core 7 to enter the inner cylinder 23 of the profile control device 2 from bottom to top, and enabling a fourth profile control liquid channel 723 of the profile control core 7, the first profile control liquid channel 220 of the profile control device 2 and the second profile control liquid channel to be communicated 230;
c, injecting profile control liquid to enable the profile control liquid to enter the stratum through a fourth profile control liquid channel 723 of the profile control core 7, the first profile control liquid channel 220 of the profile control device 2 and the second profile control liquid channel communication 230;
d, after the injection of the profile control liquid is finished, fishing out the profile control core 7 from the ground, finishing the profile control operation and recovering the water injection operation.
In the following, a two-stage separate injection profile control integrated tubular column is taken as an example, and the separate injection profile control integrated tubular column and the process provided by the embodiment of the invention are further explained.
Referring to fig. 4, the two-stage separate injection profile control integrated tubular column includes: the packer comprises a first packer, a first section of water injection profile control pipe column, a second packer, a second section of water injection profile control pipe column, a check valve 4 sieve pipe 5 and a plug 6 which are sequentially connected from the wellhead downwards.
Wherein, first section water injection profile control tubular column and second section water injection profile control tubular column all include water injection mandrel 3 and profile control ware 2, and profile control ware 2 is located water injection mandrel 3 top (the profile control ware can be located the water injection mandrel below in the first section water injection profile control tubular column).
The separate injection profile control integrated process based on the separate injection profile control integrated pipe column comprises the following steps:
firstly, after the pipe column is lowered to a designed position, the oil pipe is pressed to enable each packer to be set. And then, a water injection measuring and adjusting instrument is put in to open each water distributor to perform water injection operation.
When profile control operation is required, a water injection testing and adjusting instrument is put in to close the water distributor in the first section of water injection profile control string (the water distributor in the second section of water injection profile control string is not closed). Then the profile control core 7 is delivered to the lower part of the profile control device of the second section of water injection profile control tubular column through a steel wire and a delivery head, and then the profile control core 7 is slowly lifted until the supporting claw 76 of the profile control core 7 is abutted against the supporting step 251 of the spring seat 25 of the profile control device 2, so that the profile control core 7 is fixed in the profile control device 2. Then the steel wire and the feeding head are lifted out of the ground. At this point, the profile core 7 separates the profile section from the lower tubing string.
Then, profile control fluid is injected into the pipe column, enters the valve body 72 of the profile control core 7, sequentially passes through a fourth profile control fluid channel 723 on the valve body 72 of the profile control core 7, a second profile control fluid channel 230 on the inner cylinder 23 of the profile control device 2 and a first profile control fluid channel 220 on the outer cylinder 22 of the profile control device 2, enters the oil jacket annulus, and then enters the stratum. After the profile control fluid completely enters the ground, under the restoring force of the first spring 26 and the second spring 75, the valve ball 73 seals the fourth profile control fluid channel 723 on the valve body 72 of the profile control core 7, and the second profile control fluid channel 230 on the inner cylinder 23 of the profile control device 2 and the first profile control fluid channel 220 on the outer cylinder 22 are staggered from each other, so that the profile control fluid is prevented from flowing back.
And then, lowering a steel wire and feeding the profile control core 7 to the upper end, so that the profile control core 7 enters a profile control device of the first section of water injection profile control tubular column, and then profile control is carried out on an oil layer corresponding to the first section of water injection profile control tubular column.
After the profile control operation is finished, the profile control core 7 is lifted out of the ground, and the normal water injection operation is resumed after the water distributor is opened.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A profile control tool, characterized by comprising a profile control device (2) and a profile control core (7);
the profile control device (2) comprises:
the outer cylinder (22), an upper joint (21) and a lower joint (27) which are respectively fixedly connected with the upper end and the lower end of the outer cylinder (22), an inner cylinder (23) which is positioned in the outer cylinder (22) and can move along the axial direction of the outer cylinder (22), a spring seat (25) which is fixedly connected with the lower end of the inner cylinder (23), a supporting step (251) which is arranged on the inner wall of the spring seat (25), and a first spring (26) of which the two ends are respectively fixedly connected with the spring seat (25) and the lower joint (27); the spring seat (25) is in a hollow cylindrical shape, a stepped hole is formed in the spring seat (25), the inner diameter of the upper end of the spring seat (25) is larger than that of the lower end of the spring seat, and the supporting step (251) is formed at the position where the inner diameter changes;
the cylinder walls of the outer cylinder (22) and the inner cylinder (23) are respectively provided with a first profile control liquid channel (220) and a second profile control liquid channel (230);
the profile control core (7) comprises: the valve comprises a valve body (72) with a central hole, a supporting seat (78) fixed at the lower end of the valve body (72) and used for sealing the lower end of the valve body (72), and an expandable and contractible supporting claw (76) which is positioned outside the valve body (72) and connected with the supporting seat (78); the upper part and the middle part of the valve body (72) are respectively provided with a third profile control liquid channel (720) and a fourth profile control liquid channel (723);
the valve body (72) can enter the inner cylinder (23), when the end part of the supporting claw (76) moves to the position of the supporting step (251), the supporting claw (76) can be opened and is abutted against the supporting step (251), at the moment, the valve body (72) can drive the inner cylinder (23) to move along the axial direction of the outer cylinder (22), and a gap which can enable profile control fluid to enter the interior of the valve body (72) through the third profile control fluid channel (720) is formed between the outer wall of the valve body (72) and the inner wall of the upper part of the inner cylinder (23);
in an initial state, the first and second profile control fluid channels (220, 230) are in a state of being staggered from each other; in the process of profile control operation, when the valve body (72) enters the inner cylinder (23) from bottom to top and the profile control liquid enters the valve body (72), the inner cylinder (23) can move downwards to enable the first profile control liquid channel (220), the second profile control liquid channel (230) and the fourth profile control liquid channel (723) to be communicated; when the profile control operation is finished, the first profile control fluid channel (220) and the second profile control fluid channel (230) can be restored to a state of being staggered with each other.
2. Profile control tool according to claim 1, characterized in that the profile control core (7) further comprises:
a valve ball (73) located inside the valve body (72) and movable in the axial direction of the valve body (72),
a valve ball seat (74) located within the valve body (72) for supporting the valve ball (73),
and a second spring (75) with two ends respectively fixedly connected with the support seat (78) and the valve ball seat (74);
the valve ball (73) may close the fourth profile control fluid channel (723).
3. A profile control tool according to claim 2, characterized in that the profile control core (7) further comprises:
an upper joint (71) arranged at the upper end of the valve body (72),
and a guide head (77) which is arranged at the lower end of the support seat (78) and has a hollow structure, wherein an opening for the support claw (76) to pass through is arranged on the side wall of the guide head (77).
4. A profile control tool according to any one of claims 1 to 3, characterized in that an upper sealing ring (721) and a lower sealing ring (722) are respectively arranged on the outer wall of the valve body (72) at positions on the upper and lower sides of the fourth profile control fluid channel (723).
5. The utility model provides a divide annotate profile control integration tubular column, divide and annotate profile control integration tubular column setting in the cover pipe, a serial communication port, include: at least one section of water injection profile control string (x);
the water injection profile control string (x) comprises a water distributor (3) and a profile control device (2) in the profile control tool of any one of claims 1-4 which are connected through at least one oil pipe;
and in the lowermost water injection profile control pipe column (x), the profile control device (2) is positioned above the water distributor (3).
6. The integrated zonal injection and profile control tubing string of claim 5, further comprising: the packer (1) is positioned above the uppermost water injection profile control pipe column (x) and between the two adjacent sections of the water injection profile control pipe column (x).
7. The integrated zonal injection and profile control tubing string of claim 5, further comprising: the check valve (4), the sieve tube (5) and the plug (6) are positioned below the water injection profile control pipe column (x) at the lowest part.
8. A separate injection profile control integrated pipe string according to claim 5, wherein the water distributor (3) is a concentric water distributor or an eccentric water distributor.
9. An integrated injection and profile control process, which is implemented by the integrated injection and profile control tubular column of any one of claims 5 to 8, and comprises the following steps:
a, a water injection measuring and regulating instrument is put in to close the water distributors except the water distributor positioned at the lowest part;
b, delivering a profile control core (7) to the lower part of a profile control device (5), then lifting the profile control core (7), enabling the profile control core (7) to enter an inner cylinder (23) of the profile control device (2) from bottom to top, and enabling a fourth profile control liquid channel (723) of the profile control core (7), a first profile control liquid channel (220) and a second profile control liquid channel of the profile control device (2) to be communicated (230);
c, injecting profile control liquid, and enabling the profile control liquid to enter the stratum through a fourth profile control liquid channel (723) of the profile control core (7), a first profile control liquid channel (220) and a second profile control liquid channel of the profile control device (2) in a communication mode (230);
d, after the injection of the profile control liquid is finished, fishing out the profile control core (7) from the ground, finishing the profile control operation and recovering the water injection operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418524.6A CN108999590B (en) | 2017-06-06 | 2017-06-06 | Profile control tool, separate injection profile control integrated pipe column and process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710418524.6A CN108999590B (en) | 2017-06-06 | 2017-06-06 | Profile control tool, separate injection profile control integrated pipe column and process |
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| CN108999590B true CN108999590B (en) | 2021-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113700457B (en) * | 2020-05-21 | 2023-08-22 | 中国石油天然气股份有限公司 | Dispensing pipe column, dispensing system and dispensing method |
| CN114482951B (en) * | 2020-10-27 | 2024-07-30 | 中国石油天然气股份有限公司 | Pressurized water injection pipe column |
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| CN108999590A (en) | 2018-12-14 |
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