CN117821040A - Wellbore drilling-free recovery preparation and preparation method and application thereof - Google Patents
Wellbore drilling-free recovery preparation and preparation method and application thereof Download PDFInfo
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- CN117821040A CN117821040A CN202311822511.7A CN202311822511A CN117821040A CN 117821040 A CN117821040 A CN 117821040A CN 202311822511 A CN202311822511 A CN 202311822511A CN 117821040 A CN117821040 A CN 117821040A
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- 238000011084 recovery Methods 0.000 title claims abstract description 92
- 238000002360 preparation method Methods 0.000 title claims abstract description 85
- 229920005989 resin Polymers 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 37
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 35
- 125000002091 cationic group Chemical group 0.000 claims abstract description 28
- 229920002396 Polyurea Polymers 0.000 claims abstract description 23
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 22
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- HQMLIDZJXVVKCW-UHFFFAOYSA-N 2-aminopropanamide Chemical compound CC(N)C(N)=O HQMLIDZJXVVKCW-UHFFFAOYSA-N 0.000 claims abstract description 19
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- 238000009472 formulation Methods 0.000 claims description 20
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- 238000010907 mechanical stirring Methods 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 10
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- 235000020679 tap water Nutrition 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
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- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 abstract 1
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Abstract
The invention provides a wellbore drilling-free plug recovery preparation, a preparation method and application thereof, wherein the wellbore drilling-free plug recovery preparation comprises cationic polyacrylamide, vinyl epoxy resin, aqueous polyurea resin, 2-aminopropionic diamide and water; based on the total weight of water as 100%, the contents of the cationic polyacrylamide, the vinyl epoxy resin, the aqueous polyurea resin and the 2-aminopropionamide are respectively 1.0% -2.0%, 0.5% -2.0%, 5.0% -20.0% and 0.2% -5.0%. The wellbore drilling-free recovery preparation is used for recovering the integrity of a low-yield and production-stopping well wellbore perforated by a long horizontal well, can realize the purpose of wellbore recovery, has high pressure bearing capacity after wellbore recovery, and meets the safety requirement of secondary excavation of the low-yield and production-stopping horizontal well; the well bore drilling-free recovery preparation in the well bore can be washed out of the well bore in a circulating well washing mode, so that the purpose of drilling-free is achieved.
Description
Technical Field
The invention relates to a wellbore drilling-free recovery preparation, and a preparation method and application thereof, and belongs to the technical field of oilfield chemistry.
Background
The development quantity of the horizontal wells of the oil and gas fields is increased, but the technology for recovering the integrity of the well shafts of the horizontal wells and the technology for reconstructing the well shafts are lacked, and no effective technological measures are available for secondary digging of the horizontal wells with low production and stopped production. According to statistics, the existing low-production and stopped horizontal wells are more, secondary mining and production recovery cannot be performed, and the phenomenon is caused because the existing wellbore integrity recovery material needs to be subjected to drilling and plugging operation after measures, but for horizontal well horizontal sections of which the horizontal well is more than 1000m and even 2000m, the full-horizontal section drilling and plugging is not different from re-drilling a horizontal well, the operation cost is extremely high, and the risks that the curing time is difficult to control, the drilling and plugging construction safety risk is high, the secondary damage of a sleeve is easy to occur and the like are also present.
Therefore, aiming at the defects that the prior recovery material measures need to be drilled and plugged, the construction safety risk is high, the casing damage is easy to occur and the like, the novel wellbore drilling-plug-free recovery preparation, the preparation method and the application thereof are provided, and the technical problems to be solved in the field are urgent.
Disclosure of Invention
In order to solve the above-mentioned drawbacks and disadvantages, it is an object of the present invention to provide a wellbore drilling-free recovery formulation.
Another object of the present invention is to provide a method for preparing the wellbore drilling-free recovery formulation described above.
It is still another object of the present invention to provide the use of the wellbore drilling-free recovery formulation described above for recovery of wellbore integrity in low-and shut-in wells that have been perforated in long horizontal wells.
In order to achieve the above object, in one aspect, the present invention provides a wellbore drilling-free plug recovery formulation, wherein the wellbore drilling-free plug recovery formulation comprises cationic polyacrylamide, vinyl epoxy resin, aqueous polyurea resin, 2-aminopropionamide and water;
based on the total weight of water as 100%, the contents of the cationic polyacrylamide, the vinyl epoxy resin, the aqueous polyurea resin and the 2-aminopropionamide are respectively 1.0% -2.0%, 0.5% -2.0%, 5.0% -20.0% and 0.2% -5.0%.
As a specific embodiment of the wellbore drilling-free recovery formulation according to the present invention, the water includes tap water and the like.
In the wellbore drilling-free recovery preparation provided by the invention, the cationic polyacrylamide mainly plays a role in suspension, and if the cationic polyacrylamide is not used, layering phenomenon can occur in the system, so that the purpose of preparing the wellbore drilling-free recovery preparation cannot be realized;
the 2-aminopropionamide mainly plays a role in stabilizing a system, and if the 2-aminopropionamide is not used, the system can be cured in advance under the action of hydrogen bonds and/or ions in water, and the purpose of preparing the wellbore drilling-free recovery preparation cannot be achieved.
In the invention, the cationic polyacrylamide, the vinyl epoxy resin, the aqueous polyurea resin and the 2-aminopropionamide are all conventional substances, and can be obtained commercially or prepared by the conventional preparation method.
In another aspect, the invention also provides a preparation method of the wellbore drilling-free recovery preparation, wherein the preparation method comprises the following steps:
step (1): dissolving cationic polyacrylamide in water and fully swelling the cationic polyacrylamide to obtain cationic polyacrylamide solution;
step (2): adding vinyl epoxy resin and aqueous polyurea resin into the cationic polyacrylamide solution, and uniformly mixing to obtain a mixture;
step (3): and adding 2-aminopropionamide into the mixture, and uniformly mixing to obtain the wellbore drilling-free recovery preparation.
As a specific embodiment of the above preparation method of the present invention, in the step (1), the cationic polyacrylamide is dissolved in water and kept for more than 24 hours to be sufficiently swelled.
As a specific embodiment of the above preparation method of the present invention, in the step (2), a vinyl epoxy resin and an aqueous polyurea resin are sequentially added to the cationic polyacrylamide solution.
As a specific embodiment of the preparation method of the present invention, in the step (2), the uniform mixing is achieved by mechanical stirring.
In step (3), 2-aminopropionamide is added into the mixture under the condition of mechanical stirring and is uniformly mixed by mechanical stirring to obtain the wellbore drilling-free recovery preparation.
The preparation method of the wellbore drilling-free recovery preparation provided by the invention has no chemical reaction and only relates to a physical process.
In yet another aspect, the invention also provides the use of a wellbore drilling-free recovery formulation as described above in the recovery of wellbore integrity in low-and shut-in wells perforated in long horizontal wells.
As a specific embodiment of the above application of the invention, wherein the temperature in the well during application is <120 ℃.
As a specific embodiment of the above application of the present invention, the length of the horizontal section of the long horizontal well is 1000m or more.
Typically, the sequence of leak-off passages from the wellbore to the formation is: casing-first cemented surface-cement sheath-second cemented surface-formation (formation pores, fractures, etc.).
As a specific embodiment of the application of the present invention, the application includes the following specific steps:
enabling the wellbore drilling-free recovery preparation to reach a well cementation cement ring, a stratum pore and a stratum crack through a casing perforation, at the moment, performing dispersion fluid loss, enabling water molecules in the wellbore drilling-free recovery preparation to enter a deep stratum through the stratum pore and the stratum crack fluid loss, solidifying resin aggregates on a stratum crack fluid loss surface through resin, heating the stratum temperature, solidifying and compacting the resin aggregates under the extrusion of wellbore pressure, and cementing the resin aggregates with the stratum and a well cementation cement ring to finish wellbore recovery;
because the water cannot be lost, the well bore drilling-free recovery preparation in the well bore still keeps a liquid state, and the well bore is washed out in a circulating well washing mode, so that the purpose of drilling-free is achieved. The residual well bore drilling-free recovery preparation in the well bore is injected redundantly, and the plugging product needs to be designed with enough redundancy in the actual plugging construction operation so as to ensure the primary success rate of plugging. Because of the design of redundancy, the residual conventional plugging agent is solidified in the shaft, and the plugging operation after plugging is needed, while the drilling-free recovery preparation for the shaft provided by the invention still maintains a liquid state in the shaft, and can be washed out of the shaft in a circulating well washing mode, so that the purpose of drilling-free can be achieved.
Compared with the prior art, the invention has the following beneficial technical effects:
the wellbore drilling-free recovery preparation provided by the invention is used for the low-yield and production-stopping well wellbore integrity recovery process of a long horizontal well perforated, and when the wellbore drilling-free recovery preparation reaches a well cementation cement ring, a stratum pore and a stratum fracture through a casing perforation, dispersion fluid loss is generated, water molecules in the wellbore drilling-free recovery preparation can be filtered and lost into deep stratum by the stratum pore and the stratum fracture, resin aggregates are formed on the stratum fracture fluid loss surface, and are solidified and compacted under the extrusion of the stratum temperature and the wellbore pressure, so that the resin aggregates are cemented with the stratum and a well cementation cement ring, the purpose of wellbore recovery is achieved, the bearing capacity is high after the wellbore recovery, and the secondary well-sinking safety requirements of the low-yield and production-stopping horizontal well are met; the wellbore drilling-free recovery preparation in the wellbore still keeps a liquid state because water cannot be lost, and the wellbore can be washed out in a circulating well washing mode, so that the purpose of drilling-free is achieved.
Compared with the existing wellbore recovery preparation, the wellbore drilling-free recovery preparation provided by the invention has obvious beneficial effects, is mainly influenced by ground pressure, stratum fluid loss coefficient and temperature in a well during operation, has strong parameter influence controllability, and can effectively improve the success rate of measures. In addition, the wellbore drilling-free recovery preparation provided by the invention is simple in site construction operation, greatly reduces the risk of construction, improves the safety of construction, shortens the operation period and improves the comprehensive economic benefit.
Detailed Description
It should be noted that, in the description of the present invention and in the claims, the term "comprising" and any variations thereof, is intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
The "range" disclosed herein is given in the form of a lower limit and an upper limit. There may be one or more lower limits and one or more upper limits, respectively. The given range is defined by selecting a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular ranges. All ranges defined in this way are combinable, i.e. any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for specific parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values listed are 1 and 2 and the maximum range values listed are 3,4 and 5, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5.
In the present invention, unless otherwise indicated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" have been listed throughout this disclosure, and "0-5" is only a shorthand representation of a combination of these values.
In the present invention, all the embodiments and preferred embodiments mentioned in the present invention may be combined with each other to form new technical solutions, unless otherwise specified.
In the present invention, all technical features mentioned in the present invention and preferred features may be combined with each other to form a new technical solution unless specifically stated otherwise.
In the present invention, all the steps mentioned herein may be performed sequentially or randomly, but are preferably performed sequentially, unless otherwise specified. For example, the method comprises steps (a) and (b), meaning that the method may comprise steps (a) and (b) performed sequentially, or may comprise steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), may include steps (a), (c) and (b), may include steps (c), (a) and (b), and the like.
The present invention will be described in further detail with reference to the accompanying drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. The following described embodiments are some, but not all, examples of the present invention and are merely illustrative of the present invention and should not be construed as limiting the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
The embodiment provides a wellbore drilling-free recovery preparation, which is prepared by a preparation method comprising the following specific steps:
1.0 g of cationic polyacrylamide is added into 100 ml of tap water and fully swelled for 24 hours; sequentially adding 0.5 g of vinyl epoxy resin and 5.0 g of aqueous polyurea resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; slowly adding 0.2 g of 2-aminopropionamide into the mixed solution under the condition of mechanical stirring, and mechanically stirring uniformly to obtain the wellbore drilling-free recovery preparation.
Example 2
The embodiment provides a wellbore drilling-free recovery preparation, which is prepared by a preparation method comprising the following specific steps:
2.0 g of cationic polyacrylamide is added into 100 ml of tap water and fully swelled for 24 hours; sequentially adding 2.0 g of vinyl epoxy resin and 20.0 g of aqueous polyurea resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; slowly adding 5.0 g of 2-aminopropionamide into the mixed solution under the condition of mechanical stirring, and mechanically stirring uniformly to obtain the wellbore drilling-free recovery preparation.
Example 3
The embodiment provides a wellbore drilling-free recovery preparation, which is prepared by a preparation method comprising the following specific steps:
1.5 g of cationic polyacrylamide is added into 100 ml of tap water and fully swelled for 24 hours; sequentially adding 1.5 g of vinyl epoxy resin and 15.0 g of aqueous polyurea resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; slowly adding 2.5 g of 2-aminopropionamide into the mixed solution under the condition of mechanical stirring, and mechanically stirring uniformly to obtain the wellbore drilling-free recovery preparation.
Comparative example 1
The comparative example provides a wellbore retrieval formulation prepared by a preparation method comprising the following specific steps:
0.5 g of cationic polyacrylamide is added into 100 ml of tap water, and the mixture is fully swelled for 24 hours; sequentially adding 0.2 g of vinyl epoxy resin and 3.0 g of aqueous polyurea resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; slowly adding 0.1 g of 2-aminopropionamide into the mixed solution under the condition of mechanical stirring, and mechanically stirring uniformly to obtain the wellbore retrieval preparation.
Comparative example 2
The comparative example provides a wellbore retrieval formulation prepared by a preparation method comprising the following specific steps:
2.5 g of cationic polyacrylamide is added into 100 ml of tap water and fully swelled for 24 hours; sequentially adding 2.0 g of vinyl epoxy resin and 35.0 g of aqueous polyurea resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; under the condition of mechanical stirring, 6.0 g of 2-aminopropionamide is slowly added into the mixed solution, and the mixture is mechanically stirred uniformly to obtain the wellbore retrieval preparation.
Comparative example 3
This comparative example provides a wellbore retrieval formulation which differs from example 1 only in that:
no vinyl epoxy resin was used and the amount of aqueous polyurea resin was 5.5 grams;
the preparation method of the wellbore retrieval preparation specifically comprises the following steps: 1.0 g of cationic polyacrylamide is added into 100 ml of tap water and fully swelled for 24 hours; adding 5.5 g of aqueous polyurea resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; slowly adding 0.2 g of 2-aminopropionamide into the mixed solution under the condition of mechanical stirring, and mechanically stirring uniformly to obtain the wellbore retrieval preparation.
Comparative example 4
This comparative example provides a wellbore retrieval formulation which differs from example 1 only in that:
no aqueous polyurea resin was used and the vinyl epoxy resin was used in an amount of 5.5 grams;
the preparation method of the wellbore retrieval preparation specifically comprises the following steps: 1.0 g of cationic polyacrylamide is added into 100 ml of tap water and fully swelled for 24 hours; adding 5.5 g of vinyl epoxy resin into the fully swelled polyacrylamide solution, and fully and uniformly stirring; slowly adding 0.2 g of 2-aminopropionamide into the mixed solution under the condition of mechanical stirring, and mechanically stirring uniformly to obtain the wellbore retrieval preparation.
Performance test example 1
This test example performs a casing recovery pressure test on the wellbore drilling-free recovery formulation provided in examples 1 to 3 of the present invention and the wellbore recovery formulation provided in comparative examples 1 to 4, respectively, and the test method includes:
punching holes on the sleeve wall with 139.7mm of outer diameter, 9.17mm of wall thickness and steel grade P110 of material, wherein the hole diameter is 1.0 cm; cement filling pouring modules are arranged outside the casing, artificial perforating charges are emitted from the perforating positions, and the real perforating state in the stratum is simulated; placing the experimental module in a constant temperature chamber at 60 ℃, slowly injecting a wellbore drilling-free recovery preparation or a wellbore recovery preparation from perforation holes in a sleeve, recording data such as injection pressure, injection flow rate and the like during injection, continuously injecting, and stopping injection after filtrate oozing from the periphery of a perforation position to be simulated is the wellbore drilling-free recovery preparation or the wellbore recovery preparation; continuing to stabilize the pressure for more than 6 hours at the temperature, so that the wellbore drilling-free recovery preparation or the wellbore recovery preparation is fully lost in the simulated perforation, and the resin aggregate in the perforation crack and the cement outside the sleeve are fully compacted and solidified to form a plugging body which is integrally cemented together; and finally, cleaning unreacted well bore drilling-plug-free restoration preparation or well bore restoration preparation in the well bore by using clear water, and testing the pressure bearing capacity after restoration, wherein the obtained experimental results are shown in the table 1 below.
Table 1 wellbore drilling-free recovery formulation or wellbore recovery formulation casing recovery pressure test results at 60 c
From the experimental data in table 1 above, it can be seen that the wellbore drilling-free recovery preparation provided in embodiments 1-3 of the present invention has the advantages of simple preparation, convenient site construction, high construction safety, high bearing capacity after recovery of the wellbore, and the drilling-free property after the measure can greatly save the construction period and reduce the operation cost.
Compared with the wellbore drilling-free recovery preparation provided in the embodiments 1-3, the wellbore recovery preparation provided in the comparative example 1 has lower comprehensive concentration of components and does not meet the requirements of the invention, and at the moment, the wellbore drilling-free recovery preparation has too high water content and great water loss difficulty, cannot form effective resin aggregates or has too low strength of the formed resin aggregates, and does not meet the wellbore recovery requirements.
Compared with the wellbore drilling-free recovery preparation provided in the examples 1-3, the wellbore recovery preparation provided in the comparative example 2 has higher comprehensive concentration of components and does not meet the requirements of the invention, and the injection property of the wellbore recovery preparation is poor and the construction is impossible.
Compared with the wellbore drilling-free recovery preparation provided by the embodiment 1 of the invention, the wellbore recovery preparation provided by the comparative example 3 does not use vinyl epoxy resin, and the vinyl epoxy resin in the wellbore drilling-free recovery preparation has the main function of improving the generation speed and strength of the resin aggregate, and if the vinyl epoxy resin is not used, the strength of the formed resin aggregate is insufficient and cannot bear high pressure, so that the wellbore recovery effect cannot be achieved.
Compared with the wellbore drilling-free recovery preparation provided by the embodiment 1 of the invention, the wellbore recovery preparation provided by the comparative example 4 does not use the aqueous polyurea resin, the aqueous polyurea resin in the wellbore drilling-free recovery preparation is a core component, the aqueous polyurea resin has excellent tensile strength, elongation and mechanical properties, and has good adhesiveness with base materials such as metal and silicon dioxide, and if the aqueous polyurea resin is not used, micro cracks are usually formed between a formed resin aggregate and a sleeve or a cement ring, so that the wellbore recovery effect cannot be achieved.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical features and the technical features, the technical features and the technical invention can be freely combined for use.
Claims (10)
1. A wellbore drilling-free recovery formulation, characterized in that the wellbore drilling-free recovery formulation comprises cationic polyacrylamide, vinyl epoxy resin, aqueous polyurea resin, 2-aminopropionamide and water;
based on the total weight of water as 100%, the contents of the cationic polyacrylamide, the vinyl epoxy resin, the aqueous polyurea resin and the 2-aminopropionamide are respectively 1.0% -2.0%, 0.5% -2.0%, 5.0% -20.0% and 0.2% -5.0%.
2. The wellbore drilling-free recovery formulation of claim 1, wherein the water comprises tap water.
3. A method of preparing the wellbore drilling-free recovery formulation of claim 1 or 2, comprising:
step (1): dissolving cationic polyacrylamide in water and fully swelling the cationic polyacrylamide to obtain cationic polyacrylamide solution;
step (2): adding vinyl epoxy resin and aqueous polyurea resin into the cationic polyacrylamide solution, and uniformly mixing to obtain a mixture;
step (3): and adding 2-aminopropionamide into the mixture, and uniformly mixing to obtain the wellbore drilling-free recovery preparation.
4. A method according to claim 3, wherein in step (1), the cationic polyacrylamide is dissolved in water and kept for 24 hours or more to be sufficiently swelled.
5. The method according to claim 3, wherein in the step (2), a vinyl epoxy resin and an aqueous polyurea resin are sequentially added to the cationic polyacrylamide solution.
6. The method according to claim 3 or 5, wherein in the step (2), the uniform mixing is achieved by mechanical stirring.
7. The method according to claim 3, wherein in the step (3), 2-aminopropionamide is added to the mixture under the condition of mechanical stirring and uniformly mixed by mechanical stirring to obtain the wellbore drilling-free recovery preparation.
8. Use of the wellbore drilling-free recovery formulation of claim 1 or 2 in recovery of wellbore integrity of a low-producing, shut-in well that has been perforated in a long horizontal well.
9. The use according to claim 8, wherein the length of the horizontal section of the long horizontal well is 1000m or more.
10. The use according to claim 8 or 9, characterized in that it comprises the following specific steps:
enabling the wellbore drilling-free recovery preparation to reach a well cementation cement sheath, a stratum pore and a stratum crack through a casing perforation, wherein dispersion fluid loss occurs at the moment, water molecules in the wellbore drilling-free recovery preparation are fluid loss by the stratum pore and the stratum crack and enter a deep stratum, resin aggregates are formed on the stratum crack fluid loss surface, and the resin aggregates are solidified and compacted under the extrusion of the wellbore pressure and are cemented with the stratum and a well cementation cement sheath to complete wellbore recovery;
because the water cannot be lost, the well bore drilling-free recovery preparation in the well bore still keeps a liquid state, and the well bore is washed out in a circulating well washing mode, so that the purpose of drilling-free is achieved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311822511.7A CN117821040A (en) | 2023-12-27 | 2023-12-27 | Wellbore drilling-free recovery preparation and preparation method and application thereof |
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| CN202311822511.7A CN117821040A (en) | 2023-12-27 | 2023-12-27 | Wellbore drilling-free recovery preparation and preparation method and application thereof |
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| CN202311822511.7A Pending CN117821040A (en) | 2023-12-27 | 2023-12-27 | Wellbore drilling-free recovery preparation and preparation method and application thereof |
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