阅读说明：本技术 筛管完井分段调堵措施管柱和筛管完井分段调堵措施方法 (Screen pipe well completion sectional plugging adjustment measure pipe column and screen pipe well completion sectional plugging adjustment measure method ) 是由 吴晓明 王磊 王颖 李鑫 李红爽 吴享远 关志忠 杨东升 方梁锋 蔡龙浩 徐青竹 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种筛管完井分段调堵措施管柱和筛管完井分段调堵措施方法,所述筛管完井分段调堵措施管柱包括沿轴向依次设置的丢手封隔器(12)和金属管(16),金属管(16)外依次套设有第一膨胀式封隔器(2)、第二膨胀式封隔器(3)、第三膨胀式封隔器(4)和第四膨胀式封隔器(5),金属管(16)上设有第一化学封隔剂注入单流阀(6)、第二化学封隔剂注入单流阀(7)、第一化学调堵剂注入单流阀(8)和第一生产单流阀(10)。该筛管完井分段调堵措施管柱和筛管完井分段调堵措施方法在筛管完井的水平井中可实现分段封隔措施,使水平井均匀产液,提高水平井的开发效果。(The invention discloses a screen pipe completion sectional plugging regulating measure tubular column and a screen pipe completion sectional plugging regulating measure method, wherein the screen pipe completion sectional plugging regulating measure tubular column comprises a releasing packer (12) and a metal pipe (16) which are sequentially arranged along the axial direction, a first expansion type packer (2), a second expansion type packer (3), a third expansion type packer (4) and a fourth expansion type packer (5) are sequentially sleeved outside the metal pipe (16), and a first chemical packer injection check valve (6), a second chemical packer injection check valve (7), a first chemical packer injection check valve (8) and a first production check valve (10) are arranged on the metal pipe (16). The screen pipe well completion subsection plugging adjustment measure tubular column and the screen pipe well completion subsection plugging adjustment measure method can realize subsection packing measures in a horizontal well of screen pipe well completion, enable the horizontal well to produce liquid uniformly, and improve the development effect of the horizontal well.)

1. The segmented plugging control measure tubular column for the screen pipe well completion is characterized by comprising a releasing packer (12) and a metal pipe (16) which are sequentially arranged along the axial direction, wherein a first expansion type packer (2), a second expansion type packer (3), a third expansion type packer (4) and a fourth expansion type packer (5) are sequentially sleeved outside the metal pipe (16) along the axial direction of the metal pipe (16), a first chemical packer injection check valve (6), a second chemical packer injection check valve (7), a first chemical plugging control agent injection check valve (8) and a first production check valve (10) are arranged on the metal pipe (16), the first chemical packer injection check valve (6) is positioned between the first expansion type packer (2) and the second expansion type packer (3), and the second chemical packer injection check valve (7) is positioned between the third expansion type packer (4) and the fourth expansion type packer (5) The first chemical profile control agent injection check valve (8) and the first production check valve (10) are both located between the second inflatable packer (3) and the third inflatable packer (4).

2. The screened completion zonal plugging control measure string of claim 1, further comprising a guiding mechanism (13), wherein the packer (12) is located between the guiding mechanism (13) and the metal pipe (16).

3. The screen completion segmented plugging measure string according to claim 1, further comprising an insert seal (14), wherein the insert seal (14) is sealingly and fixedly sleeved in the metal pipe (16), and the insert seal (14) is located between the release packer (12) and the first inflatable packer (2) along the axial direction of the metal pipe (16).

4. The screen completion segmented plugging measure string according to claim 1, wherein a plurality of first through holes are formed in the wall of the metal pipe (16), the plurality of first through holes correspond to the first inflatable packer (2), the second inflatable packer (3), the third inflatable packer (4) and the fourth inflatable packer (5) in a one-to-one manner, and fluids can be injected into the first inflatable packer (2), the second inflatable packer (3), the third inflatable packer (4) and the fourth inflatable packer (5) through the plurality of first through holes.

5. The screen completion sectionalized plugging control measure string as recited in claim 1, wherein the first chemical packer injection check valve (6) and the second chemical packer injection check valve (7) have a flow direction such that the fluid in the metal pipe (16) can only be discharged through the first chemical packer injection check valve (6) and the second chemical packer injection check valve (7).

6. The screen completion zonal plugging control measure string of claim 1, wherein the first chemical plugging agent injection check valve (8) has a flow direction such that fluid in the metal pipe (16) can only be discharged through the first chemical plugging agent injection check valve (8).

7. The screen completion zonal plugging control strategy string of claim 1, wherein the first production check valve (10) has a flow direction such that fluid outside the metal tubular (16) can only enter through the first production check valve (10).

8. The screen completion zonal plugging measure string of claim 1, wherein the cracking pressure of the first chemical plugging agent injection check valve (8) is greater than the cracking pressure of the first chemical packer injection check valve (6), the cracking pressure of the first chemical packer injection check valve (6) is greater than the injection pressure of the first inflatable packer (2), and the first inflatable packer (2), the second inflatable packer (3), the third inflatable packer (4), and the fourth inflatable packer (5) are the same.

9. The screen completion segmented plugging control measure tubular column according to claim 1, wherein a second production check valve (11) and a second chemical plugging control agent injection check valve (9) are further arranged on the metal pipe (16), a plug (1) is arranged in the front end of the metal pipe (16), a fourth expansion type packer (5), the second production check valve (11), the second chemical plugging control agent injection check valve (9) and the plug (1) are sequentially arranged along the axial direction of the metal pipe (16), the first chemical plugging control agent injection check valve (6) and the second chemical plugging control agent injection check valve (7) are the same, the second production check valve (11) and the first production check valve (10) are the same, and the second chemical plugging control agent injection check valve (9) and the first chemical plugging control agent injection check valve (8) are the same.

10. The screen pipe completion sectional plugging regulating measure method is characterized in that the screen pipe completion sectional plugging regulating measure method adopts the screen pipe completion sectional plugging regulating measure tubular column of claim 1, and the screen pipe completion sectional plugging regulating measure method comprises the following steps:

step 1, throwing the screen pipe well completion segmented plugging regulating measure pipe column to a preset position;

step 2, inserting an oil pipe into the metal pipe (16);

step 3, injecting a packing agent into the metal pipe (16) through the oil pipe, wherein the pressure in the metal pipe (16) is a first pressure, the packing agent enters a first inflatable packer (2), a second inflatable packer (3), a third inflatable packer (4) and a fourth inflatable packer (5), the first inflatable packer (2), the second inflatable packer (3), the third inflatable packer (4) and the fourth inflatable packer (5) keep an inflatable packing state, the first pressure is greater than or equal to the injection pressure of the first inflatable packer (2), and the first pressure is less than the opening pressure of a first chemical packing agent injection check valve (6) and a second chemical packing agent injection valve (7);

step 4, continuing to inject the packing agent into the metal pipe (16) through the oil pipe and increasing the pressure in the metal pipe (16), wherein the pressure in the metal pipe (16) is a second pressure, the first chemical packing agent injection check valve (6) and the second chemical packing agent injection check valve (7) are both in an open state, the packing agent enters an annular space between the metal pipe (16) and the sieve pipe (15) through the first chemical packing agent injection check valve (6) and the second chemical packing agent injection check valve (7), and the second pressure is greater than the open pressures of the first chemical packing agent injection check valve (6) and the second chemical packing agent injection check valve (7);

step 5, injecting a plugging agent into the metal pipe (16) through the oil pipe, wherein the pressure in the metal pipe (16) is a third pressure, the first chemical plugging agent injection check valve (8) is in an open state, the plugging agent enters an annular space between the metal pipe (16) and the sieve tube (15) through the first chemical plugging agent injection check valve (8), the third pressure is greater than the second pressure, and the third pressure is greater than the open pressure of the first chemical plugging agent injection check valve (8);

and 6, injecting acid liquor into the metal pipe (16) through the oil pipe, dissolving the acid liquor in the area around the first production check valve (10), and allowing the formation liquor to enter the metal pipe (16) through the sieve pipe (15) and the first production check valve (10) in sequence.

Technical Field

The invention relates to the technical field of oil exploitation, in particular to a screen pipe well completion sectional plugging adjustment measure tubular column and a screen pipe well completion sectional plugging adjustment measure method.

Background

The horizontal well has unique advantages in the aspects of improving the yield of a single well, realizing the development of ultra-thick oil, realizing the effective utilization of difficult-to-recover reserves and the like, but the prior horizontal well is mainly a screen pipe well completion horizontal well, and after the well is completed in advance, if the problems of water channeling, steam channeling in the steam injection process and the like occur in the production process, sectional measures cannot be effectively implemented due to the channeling outside of the pipe. At present, for a horizontal well with a screen pipe completion, measures are taken after water channeling or steam channeling: firstly, for heel channeling, the temporary plugging agent is used for plugging toes and then the plugging agent is used for plugging the heels. There is not a good solution for water discharge of the middle section and the tiptoe of the horizontal well.

Disclosure of Invention

In order to sectionalize and separate a horizontal well, the invention provides a screen pipe well completion subsection plugging adjustment measure tubular column and a screen pipe well completion subsection plugging adjustment measure method.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a screen pipe well completion segmentation is transferred and is blocked up measure tubular column, including releasing packer and the tubular metal resonator that sets gradually along the axial, along the axial direction of tubular metal resonator, the tubular metal resonator overcoat is equipped with first inflation packer in proper order, the second inflation packer, third inflation packer and fourth inflation packer, be equipped with first chemical packer on the tubular metal resonator and pour into the check valve, second chemical packer pours into the check valve, first chemical packer pours into the check valve and the first production check valve, first chemical packer pours into the check valve and is located between first inflation packer and the second inflation packer, second chemical packer pours into the check valve and is located between third inflation packer and the fourth inflation packer, first chemical packer pours into the check valve and the first production check valve all is located between second inflation packer and the third inflation packer.

The screen pipe well completion segmented plugging regulating measure tubular column further comprises a guide mechanism, and the releasing packer is located between the guide mechanism and the metal pipe.

The screen pipe well completion segmented plugging regulating measure tubular column further comprises an inserting sealing element, the inserting sealing element is fixedly sleeved in the metal pipe in a sealing mode, and the inserting sealing element is located between the releasing packer and the first expansion packer along the axial direction of the metal pipe.

The pipe wall of the metal pipe is provided with a plurality of first through holes, the first through holes are in one-to-one correspondence with the first inflatable packer, the second inflatable packer, the third inflatable packer and the fourth inflatable packer respectively, and fluid can be injected into the first inflatable packer, the second inflatable packer, the third inflatable packer and the fourth inflatable packer through the first through holes.

The flow direction of the first chemical packing agent injection check valve and the second chemical packing agent injection check valve is that the fluid in the metal pipe can only be discharged through the first chemical packing agent injection check valve and the second chemical packing agent injection check valve.

The flow direction of the first chemical plugging agent injected into the check valve is that the fluid in the metal pipe can only be discharged through the first chemical plugging agent injected into the check valve.

The first production check valve has a flow direction such that fluid outside the metal tube can only enter through the first production check valve.

The opening pressure of the first chemical plugging agent injected into the check valve is greater than that of the first chemical packer injected into the check valve, the opening pressure of the first chemical packer injected into the check valve is greater than that of the first inflatable packer, and the first inflatable packer, the second inflatable packer, the third inflatable packer and the fourth inflatable packer are the same.

The metal pipe is also provided with a second production check valve and a second chemical plugging agent injection check valve, the front end of the metal pipe is internally provided with a plug, a fourth expansion type packer, the second production check valve, the second chemical plugging agent injection check valve and the plug are sequentially arranged along the axial direction of the metal pipe, the first chemical plugging agent injection check valve is the same as the second chemical plugging agent injection check valve, the second production check valve is the same as the first production check valve, and the second chemical plugging agent injection check valve is the same as the first chemical plugging agent injection check valve.

The screen pipe completion segmented plugging regulating measure method adopts the screen pipe completion segmented plugging regulating measure tubular column, and comprises the following steps:

step 1, throwing the screen pipe well completion segmented plugging regulating measure pipe column to a preset position;

step 2, inserting an oil pipe into the metal pipe;

step 3, injecting a packing agent into the metal pipe through the oil pipe, wherein the pressure in the metal pipe is a first pressure, the packing agent enters a first inflatable packer, a second inflatable packer, a third inflatable packer and a fourth inflatable packer, the first inflatable packer, the second inflatable packer, the third inflatable packer and the fourth inflatable packer keep an inflatable packing state, the first pressure is greater than or equal to the injection pressure of the first inflatable packer, and the first pressure is less than the opening pressures of a first chemical packing agent injection check valve and a second chemical packing agent injection check valve;

step 4, continuously injecting the packing agent into the metal pipe through the oil pipe and increasing the pressure in the metal pipe, wherein the pressure in the metal pipe is a second pressure, the first chemical packing agent injection check valve and the second chemical packing agent injection check valve are both in an open state, the packing agent enters an annular space between the metal pipe and the sieve pipe through the first chemical packing agent injection check valve and the second chemical packing agent injection check valve, and the second pressure is greater than the opening pressures of the first chemical packing agent injection check valve and the second chemical packing agent injection check valve;

step 5, injecting a plugging agent into the metal pipe through the oil pipe, wherein the pressure in the metal pipe is a third pressure, the first chemical plugging agent injection check valve is in an open state, the plugging agent enters an annular space between the metal pipe and the sieve pipe through the first chemical plugging agent injection check valve, the third pressure is greater than the second pressure, and the third pressure is greater than the opening pressure of the first chemical plugging agent injection check valve;

and 6, injecting acid liquor into the metal pipe through the oil pipe, so that the acid liquor dissolves the area around the first production check valve, and the formation liquor sequentially passes through the sieve pipe and the first production check valve and enters the metal pipe.

The invention has the beneficial effects that: the screen pipe well completion subsection plugging adjustment measure tubular column and the screen pipe well completion subsection plugging adjustment measure method can realize subsection packing measures in a horizontal well of screen pipe well completion, enable the horizontal well to produce liquid uniformly, and improve the development effect of the horizontal well.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic diagram of the operation of the screen completion zonal plugging control strategy string of the present invention.

FIG. 2 is a schematic representation of a first inflatable packer construction.

Fig. 3 is a schematic diagram of the structure of a first chemical sealant injection check valve.

Fig. 4 is a schematic diagram of a first chemical plugging agent injection check valve.

Fig. 5 is a schematic diagram of a first production check valve.

1. Plugging with a thread; 2. a first inflatable packer; 3. a second inflatable packer; 4. a third inflatable packer; 5. a fourth inflatable packer; 6. injecting a first chemical packing agent into the check valve; 7. a second chemical packing agent is injected into the check valve; 8. injecting a first chemical plugging agent into the check valve; 9. injecting a second chemical plugging agent into the check valve; 10. a first production check valve; 11. a second production check valve; 12. releasing the packer; 13. a guide mechanism; 14. inserting a seal; 15. a screen pipe; 16. a metal tube;

21. a spring; 22. a valve ball; 23. a housing.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A screen pipe well completion segmented plugging measure tubular column comprises a releasing packer 12 and a metal pipe 16 which are sequentially arranged along the axial direction, a first expansion type packer 2, a second expansion type packer 3, a third expansion type packer 4 and a fourth expansion type packer 5 are sequentially sleeved outside the metal pipe 16 along the axial direction of the metal pipe 16, a first chemical packer injection check valve 6, a second chemical packer injection check valve 7, a first chemical plugging agent injection check valve 8 and a first production check valve 10 are arranged on the metal pipe 16, the first chemical packer injection check valve 6 is positioned between the first expansion type packer 2 and the second expansion type packer 3, the second chemical packer injection check valve 7 is positioned between the third expansion type packer 4 and the fourth expansion type packer 5, the first chemical plugging agent injection check valve 8 and the first production check valve 10 are both positioned between the second expansion type packer 3 and the third expansion type packer 4, as shown in fig. 1.

In this embodiment, the screen completion zonal plugging control measure string further comprises a guiding mechanism 13 and an insert seal 14. The releasing packer 12 is positioned between the guide mechanism 13 and the metal pipe 16, and the guide mechanism 13, the releasing packer 12 and the metal pipe 16 are sequentially connected and fixed along the axial direction of the screen pipe well completion subsection plugging measure pipe column. The plunge seal 14 is sealingly fixed inside the metal pipe 16, and the plunge seal 14 is located between the packer 12 and the first inflatable packer 2 in the axial direction of the metal pipe 16.

The guiding mechanism 13, the releasing packer 12 and the inserting sealing element 14 are all products in the prior art, the guiding mechanism 13 is similar to a funnel structure in structure, the material of the guiding mechanism 13 can be metal, and the guiding mechanism 13 can guide the oil pipe to pass through the releasing packer 12 and enter the metal pipe 16. The packer 12 is substantially annular in configuration and the packer 12 enables the screen completion zonal plugging measure string to be secured within the wellbore. The insert seal 14 is generally a rubber sleeve, the outer diameter of the insert seal 14 being in sealing fixed communication with the inner surface of the metal tube 16, and the oil tube being capable of passing through the inner diameter of the insert seal 14 and being in sealing communication with the insert seal 14.

The first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5 are all products in the prior art, the materials and the structures of the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5 are basically the same, the structure of the first inflatable packer 2 is approximately similar to that of a tire, two ends of the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5 are connected and fixed with a metal pipe 16, the first inflatable packer 2 can be made of rubber, and inner cavities are arranged in the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, as shown in figure 2.

In this embodiment, a first inflatable packer 2, a second inflatable packer 3, a third inflatable packer 4, and a fourth inflatable packer 5 are provided at intervals along the axial direction of a metal pipe 16, and a plurality of first through holes are provided in the pipe wall of the metal pipe 16, and the plurality of first through holes correspond to the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 one to one, respectively.

Fluid can be injected into the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 through the plurality of first through holes, thereby inflating the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 and sealing an annular space between the metal pipe 16 and the screen pipe 15.

In this embodiment, the first chemical packing agent inlet check valve 6 and the second chemical packing agent inlet check valve 7 are constructed substantially the same, and each of the first chemical packing agent inlet check valve 6 and the second chemical packing agent inlet check valve 7 includes a spring 21, a valve ball 22, and a housing 23, as shown in fig. 3.

The flow direction of the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 is that the fluid in the metal pipe 16 can only be discharged through the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7. Fluid outside the metal pipe 16 cannot enter the metal pipe 16 through the first chemical sealant injection check valve 6 and the second chemical sealant injection check valve 7.

However, the opening pressures of the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 are set, and only when the fluid pressure in the metal pipe 16 is greater than the opening pressures of the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7, the fluid in the metal pipe 16 can be discharged out of the metal pipe 16 through the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7.

In this embodiment, the first chemical plugging agent injection check valve 8 also comprises a spring 21, a valve ball 22 and a housing 23, as shown in fig. 4, the flow direction of the first chemical plugging agent injection check valve 8 is such that the fluid in the metal pipe 16 can only be discharged out of the metal pipe 16 through the first chemical plugging agent injection check valve 8, and the fluid out of the metal pipe 16 can not enter the metal pipe 16 through the first chemical plugging agent injection check valve 8. The first chemical plugging agent injection check valve 8 is provided with opening pressure, and only when the fluid pressure in the metal pipe 16 is larger than the opening pressure of the first chemical plugging agent injection check valve 8, the fluid in the metal pipe 16 can be discharged out of the metal pipe 16 through the first chemical plugging agent injection check valve 8.

In this embodiment, the first production check valve 10 also comprises a spring 21, a valve ball 22 and a housing 23, as shown in fig. 5, the flow direction of the first production check valve 10 is that the fluid outside the metal pipe 16 can only enter the metal pipe 16 through the first production check valve 10, and the fluid inside the metal pipe 16 can not be discharged out of the metal pipe 16 through the first production check valve 10. The first production check valve 10 is provided with an opening pressure and fluid outside the metal pipe 16 can enter the metal pipe 16 through the first production check valve 10 only when the fluid pressure outside the metal pipe 16 is greater than the opening pressure of the first production check valve 10.

In this embodiment, the opening pressure of the first chemical plugging agent injection check valve 8 is greater than the opening pressure of the first chemical packer injection check valve 6, the opening pressure of the first chemical packer injection check valve 6 is greater than the injection pressure of the first inflatable packer 2 (i.e., the minimum pressure at which the first inflatable packer 2 can be inflated when a fluid is injected), the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 are the same, and the injection pressures of the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 are the same.

In this embodiment, the metal pipe 16 is further provided with a second production check valve 11 and a second chemical plugging agent injection check valve 9, the front end of the metal pipe 16 is provided with a plug 1, and the fourth inflatable packer 5, the second production check valve 11, the second chemical plugging agent injection check valve 9 and the plug 1 are sequentially arranged along the axial direction of the metal pipe 16.

The first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 are the same, and the opening pressures of the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 are the same. The second production check valve 11 is the same as the first production check valve 10 and the opening pressure of the second production check valve 11 is the same as the first production check valve 10. The second chemical plugging agent injection check valve 9 is the same as the first chemical plugging agent injection check valve 8, and the opening pressure of the second chemical plugging agent injection check valve 9 is the same as the opening pressure of the first chemical plugging agent injection check valve 8.

The flow direction of the second chemical plugging agent injected into the check valve 9 is that the fluid in the metal pipe 16 can only be discharged out of the metal pipe 16 through the second chemical plugging agent injected into the check valve 9, and the fluid outside the metal pipe 16 can not enter the metal pipe 16 through the second chemical plugging agent injected into the check valve 9. The flow direction of the second production non-return valve 11 is such that fluid outside the metal pipe 16 can only enter the metal pipe 16 through the second production non-return valve 11 and fluid inside the metal pipe 16 cannot exit the metal pipe 16 through the second production non-return valve 11.

In this embodiment, the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 are completely the same, and the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4, and the fourth inflatable packer 5 are connected to the metal pipe 16 in the same relation. The first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 are completely the same, and the connection relationship between the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 and the metal pipe 16 is the same.

In this embodiment, the first chemical plugging agent injection check valve 8 and the second chemical plugging agent injection check valve 9 are identical, and the connection relationship between the first chemical plugging agent injection check valve 8 and the second chemical plugging agent injection check valve 9 and the metal pipe 16 is identical. The first production check valve 10 and the second production check valve 11 are identical, and the first production check valve 10 and the second production check valve 11 are connected to the metal pipe 16 in the same relationship.

The screen pipe completion subsection plugging adjustment measure method adopts the screen pipe completion subsection plugging adjustment measure tubular column, and if the screen pipe completion subsection plugging adjustment measure tubular column does not contain the second chemical plugging adjustment agent injection check valve 9 and the second production check valve 11, the screen pipe completion subsection plugging adjustment measure method comprises the following steps:

preparing before work, and completing the well by using a screen pipe 15 for a horizontal well;

step 1, throwing the screen pipe well completion segmented plugging regulating measure pipe column to a preset position of a horizontal segment of a horizontal well through an oil pipe by a releasing packer 12, as shown in figure 1;

step 2, in the production process, when water channeling occurs and the segmented plugging is required to be adjusted, inserting an oil pipe into the metal pipe 16, namely, the lower end of the oil pipe sequentially penetrates through the guide mechanism 13, the releasing packer 12 and the inserting sealing element 14 to enter the metal pipe 16;

step 3, injecting a packer into the metal pipe 16 through the tubing, wherein the pressure in the metal pipe 16 is a first pressure P1, the first pressure P1 is greater than or equal to the injection pressure of the first inflatable packer 2, the first pressure P1 is less than the opening pressure of the first chemical packer injection check valve 6, the packer only enters the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, the packers, the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, keep the inflatable packing state, the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, block the annular space between the screen and the metal pipe 16, when the packer has not completely solidified, carrying out the next step;

step 4, continuing to inject the packing agent into the metal pipe 16 through the oil pipe and increasing the pressure in the metal pipe 16, wherein the pressure in the metal pipe 16 is a second pressure P2, and the second pressure P2 is greater than the opening pressure of the first chemical packing agent injection check valve 6, so that the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 are both in an open state, the packing agent enters an annular space between the metal pipe 16 and the sieve pipe 15 through the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7, and the packing agent performs the next step when the sealing effect is basically achieved outside the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 but the packing agent is not completely solidified;

step 5, injecting a plugging agent into the metal pipe 16 through the oil pipe, wherein the pressure in the metal pipe 16 is a third pressure P3, the third pressure P3 is greater than the second pressure P2, the third pressure P3 is greater than the opening pressure of the first chemical plugging agent injection check valve 8, so that the first chemical plugging agent injection check valve 8 is in an open state, the plugging agent enters the annular space between the metal pipe 16 and the sieve tube 15 through the first chemical plugging agent injection check valve 8, the plugging agent also enters the annular space between the metal pipe 16 and the sieve tube 15 through the first chemical plugging agent injection check valve 6 and the second chemical plugging agent injection check valve 7, and the next step is performed when the plugging agent does not exist in the metal pipe 16 or the plugging agent is not completely solidified;

and 6, injecting acid liquor into the metal pipe 16 through the oil pipe, wherein the acid liquor dissolves the packing agent and the plugging agent in the region around the first chemical packing agent injection check valve 6, the second chemical packing agent injection check valve 7 and the first chemical plugging agent injection check valve 8, the acid liquor also dissolves the packing agent and the plugging agent in the region around the first production check valve 10, the pressure of the formation liquid passes through the opening pressure larger than that of the first production check valve 10, and the formation liquid enters the metal pipe 16 through the sieve tube 15 and the first production check valve 10 in sequence, so that normal production is realized.

The experimental process can be simulated in a laboratory to obtain actual parameters, and the screen pipe well completion segmented plugging regulation measure method can be implemented underground.

The screen pipe completion subsection plugging adjustment measure method adopts the screen pipe completion subsection plugging adjustment measure tubular column, and if the screen pipe completion subsection plugging adjustment measure tubular column contains a second chemical plugging adjustment agent injection check valve 9 and a second production check valve 11, the screen pipe completion subsection plugging adjustment measure method comprises the following steps:

preparing before work, and completing the well by using a screen pipe 15 for a horizontal well;

step 1, throwing the screen pipe well completion segmented plugging regulating measure pipe column to a preset position of a horizontal segment of a horizontal well through an oil pipe by a releasing packer 12, as shown in figure 1;

step 2, in the production process, when water channeling occurs and the segmented plugging is required to be adjusted, inserting an oil pipe into the metal pipe 16, namely, the lower end of the oil pipe sequentially penetrates through the guide mechanism 13, the releasing packer 12 and the inserting sealing element 14 to enter the metal pipe 16;

step 3, injecting a packer into the metal pipe 16 through the tubing, wherein the pressure in the metal pipe 16 is a first pressure P1, the first pressure P1 is greater than or equal to the injection pressure of the first inflatable packer 2, the first pressure P1 is less than the opening pressure of the first chemical packer injection check valve 6, the packer only enters the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, the packers, the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, keep the inflatable packing state, the first inflatable packer 2, the second inflatable packer 3, the third inflatable packer 4 and the fourth inflatable packer 5, block the annular space between the screen and the metal pipe 16, when the packer has not completely solidified, carrying out the next step;

step 4, continuing to inject the packing agent into the metal pipe 16 through the oil pipe and increasing the pressure in the metal pipe 16, wherein the pressure in the metal pipe 16 is a second pressure P2, and the second pressure P2 is greater than the opening pressure of the first chemical packing agent injection check valve 6, so that the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 are both in an open state, the packing agent enters an annular space between the metal pipe 16 and the sieve pipe 15 through the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7, and the packing agent performs the next step when the sealing effect is basically achieved outside the first chemical packing agent injection check valve 6 and the second chemical packing agent injection check valve 7 but the packing agent is not completely solidified;

step 5, injecting a plugging agent into the metal pipe 16 through the oil pipe, wherein the pressure in the metal pipe 16 is a third pressure P3, the third pressure P3 is greater than the second pressure P2, and the third pressure P3 is greater than the opening pressure of the first chemical plugging agent injection check valve 8, so that the first chemical plugging agent injection check valve 8 and the second chemical plugging agent injection check valve 9 are both in an open state, the plugging agent enters an annular space between the metal pipe 16 and the sieve pipe 15 through the first chemical plugging agent injection check valve 8 and the second chemical plugging agent injection check valve 9, the plugging agent also enters the annular space between the metal pipe 16 and the sieve pipe 15 through the first chemical plugging agent injection check valve 6 and the second chemical plugging agent injection check valve 7, and the next step is performed when the plugging agent does not exist in the metal pipe 16 or the plugging agent is not completely solidified;

and 6, injecting acid liquid into the metal pipe 16 through the oil pipe, wherein the acid liquid dissolves the packing agent and the plugging agent in the areas around the first chemical packing agent injection check valve 6, the second chemical packing agent injection check valve 7, the first chemical plugging agent injection check valve 8 and the second chemical plugging agent injection check valve 9, the acid liquid also dissolves the packing agent and the plugging agent in the areas around the first production check valve 10 and the second production check valve 11, the pressure of formation liquid passes through the opening pressure which is larger than that of the first production check valve 10 and the second production check valve 11, and the formation liquid enters the metal pipe 16 through the sieve pipe 15, the first production check valve 10 and the second production check valve 11 in sequence, so that normal production is realized.

The packer and the profile control agent are both existing products, the performance of the packer and the performance of the profile control agent are approximately the same, and the packer and the profile control agent are low in viscosity during flowing and fast solidified during standing so as to form a chemical packer and separate a formation annulus between the sieve tube and the metal tube.

The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.