CN115508201A - Fracturing string safety checking method - Google Patents
Fracturing string safety checking method Download PDFInfo
- Publication number
- CN115508201A CN115508201A CN202211133245.2A CN202211133245A CN115508201A CN 115508201 A CN115508201 A CN 115508201A CN 202211133245 A CN202211133245 A CN 202211133245A CN 115508201 A CN115508201 A CN 115508201A
- Authority
- CN
- China
- Prior art keywords
- model
- fracturing
- string
- horizontal well
- safety
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000007689 inspection Methods 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 230000010412 perfusion Effects 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a fracturing string safety checking and inspecting method, which comprises the following steps: establishing a horizontal well model, fracturing a pipe column model, combining the models, performing an insertion experiment, extracting the pipe column model, inspecting and comprehensively evaluating; the invention utilizes a method for establishing model inspection to establish a simulation model and a fracturing string model which are reduced by a horizontal well in proportion, then a simulation experiment is carried out under the same simulation working environment, data is analyzed according to the strength and the deformation of the string model, the stress dangerous section of the well hydraulic jet fracturing string is determined, the stress of the inner wall of the full well section of the string which is changed into the horizontal well model is calculated, the stress of the inner wall of the string at a certain point of the inner wall of the string is maximum, the safety coefficient of the string is minimum, the point is determined to be a dangerous point, the internal pressure, the external pressure, the axial force and the bending moment load at the dangerous section are analyzed, and comprehensive analysis is carried out according to inspection data until the safety requirement is met, so that the fracturing perfusion safety of the horizontal well can be checked, and the safety of the fracturing string operation is ensured.
Description
Technical Field
The invention belongs to the technical field related to oil and gas development, and particularly relates to a fracturing string safety checking and inspecting method.
Background
As is well known, in the technology of geophysical exploration and development of petroleum, it is a system engineering to improve the accuracy of seismic exploration, solve the complex geological problems of land sedimentary basins and select an effective development scheme, and it relates to many aspects of acquisition methods, static correction technology, noise suppression technology, fine imaging technology and development of physical simulation technology. The low-permeability oil and gas well adopts a multi-stage hydraulic jet fracturing pipe column to perform reservoir transformation, oil testing and well completion integrated operation, and due to the great change of the depth, pressure, temperature and yield of the oil and gas well, the risk of pipe column damage under the working conditions of drilling, setting, perforation, oil testing combined operation, reservoir transformation and the like is increased, and underground accidents are easy to occur, so that construction is stopped or operation is failed. The development of the horizontal well is a common development project, the multi-stage volume fracturing technology of the horizontal well is a new technology developed for effectively developing shale gas reservoirs and low-permeability oil and gas reservoirs at home and abroad in recent years, and a new problem that the mechanical environment of a fracturing pipe column is more complex is caused.
Therefore, aiming at the problems, a safety checking method is needed to check the safety performance of the fracturing string of the horizontal well, so that the safety accident caused by fracturing and filling in actual operation is avoided, and the safety of the fracturing string in actual operation can be improved.
Content of application
The invention aims to provide a fracturing string safety checking method, which is used for solving the problem of checking the fracturing perfusion safety performance of a horizontal well in the background technology, avoiding the fracturing perfusion safety accident in actual operation and improving the fracturing string safety in actual operation.
In order to achieve the purpose, the invention provides the following technical scheme:
a safety checking and inspecting method for a fracturing string comprises the following steps: establishing a horizontal well model, fracturing a tubular column model, combining the models, performing an insertion experiment, extracting the tubular column model, and performing inspection and comprehensive evaluation;
1) Establishing a horizontal well model: combining the comprehensive data of the existing horizontal well, manufacturing a horizontal well model with the same proportion as that of the existing horizontal well and the same internal data proportion as that of the existing horizontal well by using a mold;
2) Fracturing a pipe model: combining the comprehensive data of the horizontal well model, and manufacturing a fracturing pipe model with an equal proportion and a reduced proportion by using a specified mould, wherein the comprehensive data of the fracturing pipe model is the same as the proportion of the conventional fracturing string comprehensive data;
3) Combining models: calculating the tensile stress safety coefficient of each oil pipe section of the horizontal hydraulic jet fracturing string according to the strength and the length of the pipeline and the unit weight per meter, and calculating the tensile stress safety coefficient of the hydraulic jet fracturing string of the whole well section, wherein the data is calculated by taking the horizontal well model data as a basis;
4) Insertion experiment: inserting fracturing perfusion into a horizontal well, and performing work simulation for a certain time, wherein the simulated work environment is the same as the normal horizontal well work environment;
5) Extracting the pipe column model for inspection: analyzing data according to the strength and deformation of the tubular column model, determining a stress dangerous section of the well hydraulic jet fracturing tubular column, calculating the stress of the inner wall of the tubular column at the whole well section of the horizontal well model, wherein the stress at a certain point of the inner wall of the tubular column is the largest, and the safety coefficient of the stress is the lowest, so that the point is determined as a dangerous point, and analyzing the internal pressure, the external pressure, the axial force and the bending moment load at the dangerous section;
6) Comprehensive evaluation: and performing comprehensive analysis according to the inspection data, wherein the stress safety coefficient meets 1.5-1.8, the hydraulic jet fracturing string is reasonable in combination and safe in strength, otherwise, the hydraulic jet fracturing string is unreasonable in combination design, a model needs to be designed again, and the experimental operation is repeated again until the safety requirement is met.
Preferably, the horizontal well model building and the fracturing pipe model are processed by using a designated model processing tool in a processing workshop, and the model can be manufactured by adopting a 3D printing method.
Preferably, the fracturing string model consists of a hydraulic anchor, a locking device, a high-sealing packer, a guide hydraulic anchor, a sand blaster, a locking device, a high-sealing packer, a plugging device, a bottom switch and a tail pipe from top to bottom in sequence.
Preferably, the tensile stress safety factor = fracturing string tensile strength/string weight, the string weight = string length × unit weight per meter, and after calculation, geometric restoration analysis is performed by combining actual working data again according to a reduced scale of the model.
Compared with the prior art, the invention provides a fracturing string safety checking and inspecting method, which has the following beneficial effects:
the method comprises the steps of establishing a simulation model and a fracturing string model of a horizontal well according to a reduced proportion by utilizing a method for establishing model inspection, then carrying out simulation experiments under the same simulation working environment, analyzing data according to the strength and the deformation of the string model, determining the stress dangerous section of the hydraulic jet fracturing string of the well, calculating the stress of the inner wall of the string of the whole well section of the horizontal well model, determining that the stress is maximum at a certain point of the inner wall of the string, and the safety coefficient is lowest, so that the point is determined to be a dangerous point, analyzing the internal pressure, the external pressure, the axial force and the bending moment load at the dangerous section, carrying out comprehensive analysis according to inspection data, and judging that the stress safety coefficient meets 1.5-1.8, so that the hydraulic jet fracturing string is reasonable in combination and safe in strength, otherwise, the hydraulic jet fracturing string is unreasonable in combination design, the model needs to be redesigned, repeating the experiment operation again until the safety requirement is reached, and checking the fracturing perfusion safety of the horizontal well can be carried out, and the safety of the fracturing string operation is ensured.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that:
a safety check and inspection method for a fracturing string comprises the following steps: establishing a horizontal well model, fracturing a pipe column model, combining the models, performing an insertion experiment, extracting the pipe column model, inspecting and comprehensively evaluating;
1) Establishing a horizontal well model: combining the comprehensive data of the existing horizontal well, manufacturing a horizontal well model with the same proportion as that of the existing horizontal well and the same internal data proportion as that of the existing horizontal well by using a mold;
2) Fracturing a pipe model: combining the comprehensive data of the horizontal well model, and manufacturing a fracturing pipe model with an equal proportion and a reduced proportion by using a specified mould, wherein the comprehensive data of the fracturing pipe model is the same as the proportion of the conventional fracturing string comprehensive data;
3) Model combination: calculating the tensile stress safety coefficient of each oil pipe section of the horizontal hydraulic jet fracturing string according to the strength and the length of the pipeline and the unit weight per meter, and calculating the tensile stress safety coefficient of the hydraulic jet fracturing string of the whole well section, wherein the data is calculated by taking the horizontal well model data as a basis;
4) Insertion experiment: the fracturing perfusion is inserted into a horizontal well, working simulation is carried out for a certain time, and the simulated working environment is the same as the normal horizontal well working environment;
5) Extracting the pipe column model for inspection: analyzing data according to the strength and deformation of the tubular column model, determining a stress dangerous section of the well hydraulic jet fracturing tubular column, calculating the stress of the inner wall of the tubular column at the whole well section of the horizontal well model, wherein the stress at a certain point of the inner wall of the tubular column is the largest, and the safety coefficient of the stress is the lowest, so that the point is determined as a dangerous point, and analyzing the internal pressure, the external pressure, the axial force and the bending moment load at the dangerous section;
6) And (3) comprehensive evaluation: and performing comprehensive analysis according to the inspection data, wherein the stress safety coefficient meets 1.5-1.8, the hydraulic jet fracturing string is reasonable in combination and safe in strength, otherwise, the hydraulic jet fracturing string is unreasonable in combination design, a model needs to be designed again, and the experimental operation is repeated again until the safety requirement is met.
Furthermore, the horizontal well model building and the fracturing pipe model are both formed by processing through a specified model processing tool in a processing workshop, and the model can be manufactured by adopting a 3D printing method.
Furthermore, the fracturing string model sequentially comprises a hydraulic anchor, a locking device, a high-sealing packer, a guiding hydraulic anchor, a sand blaster, a locking device, a high-sealing packer, a plugging device, a bottom switch and a tail pipe from top to bottom.
Further, the tensile stress safety coefficient = the tensile strength of the fracturing string/the weight of the string, the string weight = the length of the string multiplied by the unit weight of each meter, and after calculation, the geometric recovery analysis is carried out again by combining the data of actual work according to the reduced proportion of the model.
Establishing a simulation model and a fracturing string model of a horizontal well according to a reduced proportion by utilizing a method for establishing model inspection, then performing simulation experiment under the same simulation working environment, analyzing data according to the strength and the deformation of the string model, determining the stress dangerous section of the hydraulic jet fracturing string of the well, calculating the stress of the inner wall of the string at the whole well section of the modified horizontal well model, wherein the stress at a certain point of the inner wall of the string is the largest, the safety coefficient of the string is the lowest, determining the point as a dangerous point, analyzing the internal pressure, the external pressure, the axial force and the bending moment load at the dangerous section, performing comprehensive analysis according to inspection data, and ensuring that the stress safety coefficient meets 1.5-1.8, the hydraulic jet fracturing string is reasonable in combination and safe in strength, otherwise, the hydraulic jet fracturing string is unreasonable in combination design, the model needs to be redesigned, the experiment operation is repeated again until the safety requirement is met, and the fracturing perfusion safety of the horizontal well can be checked, thereby ensuring the safety of the fracturing string operation
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A safety checking and inspecting method for a fracturing string is characterized by comprising the following steps: the inspection method comprises the following steps: establishing a horizontal well model, fracturing a tubular column model, combining the models, performing an insertion experiment, extracting the tubular column model, and performing inspection and comprehensive evaluation;
1) Establishing a horizontal well model: combining the comprehensive data of the existing horizontal well, manufacturing a horizontal well model with the same proportion as that of the existing horizontal well and the same internal data proportion as that of the existing horizontal well by using a mold;
2) A fracturing pipe model: combining the comprehensive data of the horizontal well model, and manufacturing a fracturing pipe model with an equal proportion and a reduced proportion by using a specified mould, wherein the comprehensive data of the fracturing pipe model is the same as the proportion of the conventional fracturing string comprehensive data;
3) Model combination: calculating the tensile stress safety coefficient of each oil pipe section of the horizontal hydraulic jet fracturing string according to the strength and the length of the pipeline and the unit weight per meter, and calculating the tensile stress safety coefficient of the hydraulic jet fracturing string of the whole well section, wherein the data is calculated by taking the data of a horizontal well model as a basis;
4) Insertion experiment: the fracturing perfusion is inserted into a horizontal well, working simulation is carried out for a certain time, and the simulated working environment is the same as the normal horizontal well working environment;
5) Extracting the pipe column model for inspection: analyzing data according to the strength and deformation of the tubular column model, determining a stress dangerous section of the well hydraulic jet fracturing tubular column, calculating the stress of the inner wall of the tubular column at the whole well section of the horizontal well model, wherein the stress at a certain point of the inner wall of the tubular column is the largest, and the safety coefficient of the stress is the lowest, so that the point is determined as a dangerous point, and analyzing the internal pressure, the external pressure, the axial force and the bending moment load at the dangerous section;
6) And (3) comprehensive evaluation: and performing comprehensive analysis according to the inspection data, wherein the stress safety coefficient meets 1.5-1.8, the hydraulic jet fracturing string is reasonable in combination and safe in strength, otherwise, the hydraulic jet fracturing string is unreasonable in combination design, a model needs to be redesigned, and the experiment operation is repeated again until the safety requirement is met.
2. The fracturing string safety check and inspection method according to claim 1, wherein: the horizontal well model building and the fracturing pipe model are both formed by processing through a designated model processing tool in a processing workshop, and the model can be manufactured by adopting a 3D printing method.
3. The fracturing string safety check and inspection method according to claim 1, wherein: the fracturing string model is composed of a hydraulic anchor, a locking device, a high-sealing packer, a guiding hydraulic anchor, a sand blasting device, a locking device, a high-sealing packer, a plugging device, a bottom switch and a tail pipe from top to bottom in sequence.
4. The fracturing string safety check and inspection method according to claim 1, wherein: and the tensile stress safety coefficient = the tensile strength of the fracturing string/the weight of the string, and the weight of the string = the length of the string multiplied by the unit weight of each meter, and after calculation, the geometric recovery analysis is carried out by combining the data of actual work again according to the reduced proportion of the model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211133245.2A CN115508201A (en) | 2022-09-17 | 2022-09-17 | Fracturing string safety checking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211133245.2A CN115508201A (en) | 2022-09-17 | 2022-09-17 | Fracturing string safety checking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115508201A true CN115508201A (en) | 2022-12-23 |
Family
ID=84503765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211133245.2A Pending CN115508201A (en) | 2022-09-17 | 2022-09-17 | Fracturing string safety checking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115508201A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116776765A (en) * | 2023-05-31 | 2023-09-19 | 西南石油大学 | Method for predicting and preventing failure of dangerous well section of gas-induced vibration tubular column |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672972A (en) * | 2016-01-14 | 2016-06-15 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for evaluating performance of multistage hydraulic jetting fracturing pipe column |
| CN110500090A (en) * | 2019-08-21 | 2019-11-26 | 中国石油大学(北京) | Three-dimensional volume fracturing analogy method and device |
| CN113011048A (en) * | 2021-04-23 | 2021-06-22 | 西南石油大学 | Repeated fracturing simulation method for horizontal well of compact conglomerate reservoir |
| US20220049582A1 (en) * | 2020-04-24 | 2022-02-17 | China University Of Mining And Technology, Beijing | Experimental method and system for simulating evolution of reservoir fracture stress field |
| CN114922591A (en) * | 2022-06-06 | 2022-08-19 | 中煤科工集团西安研究院有限公司 | Directional cross-layer fracturing simulation test method for horizontal well of soft coal seam roof rock stratum |
-
2022
- 2022-09-17 CN CN202211133245.2A patent/CN115508201A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672972A (en) * | 2016-01-14 | 2016-06-15 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for evaluating performance of multistage hydraulic jetting fracturing pipe column |
| CN110500090A (en) * | 2019-08-21 | 2019-11-26 | 中国石油大学(北京) | Three-dimensional volume fracturing analogy method and device |
| US20220049582A1 (en) * | 2020-04-24 | 2022-02-17 | China University Of Mining And Technology, Beijing | Experimental method and system for simulating evolution of reservoir fracture stress field |
| CN113011048A (en) * | 2021-04-23 | 2021-06-22 | 西南石油大学 | Repeated fracturing simulation method for horizontal well of compact conglomerate reservoir |
| CN114922591A (en) * | 2022-06-06 | 2022-08-19 | 中煤科工集团西安研究院有限公司 | Directional cross-layer fracturing simulation test method for horizontal well of soft coal seam roof rock stratum |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116776765A (en) * | 2023-05-31 | 2023-09-19 | 西南石油大学 | Method for predicting and preventing failure of dangerous well section of gas-induced vibration tubular column |
| CN116776765B (en) * | 2023-05-31 | 2024-05-31 | 西南石油大学 | Method for predicting and preventing failure of dangerous well section of gas-induced vibration tubular column |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11725500B2 (en) | Method for determining hydraulic fracture orientation and dimension | |
| CN108868748B (en) | Method for calculating repeated fracturing fracture opening pressure of shale gas horizontal well | |
| Kang et al. | In-situ stress measurements and stress distribution characteristics in underground coal mines in China | |
| CN110005407B (en) | Salt cavern gas storage stability evaluation method | |
| CN106529092A (en) | Finite element calculating method of shear deformation force of well casing | |
| CN109033504B (en) | Oil-water well casing damage prediction method | |
| CN115508201A (en) | Fracturing string safety checking method | |
| CN108952657B (en) | Horizontal well platform fracturing fracture length determination method and device | |
| CN114692457A (en) | Method for evaluating and processing risk of tunnel card machine by open TBM method | |
| CN107965316B (en) | Method for improving extraction effect of high-gas low-permeability single coal seam | |
| CN104405374A (en) | Method for measuring stress sensitivity of tight gas reservoir | |
| CN109958434B (en) | Drilling hydrogeological test method for drilling hole under constant pressure and unsteady flow | |
| CN113216949B (en) | Oil testing and reservoir transformation method for ultra-deep high-pressure exploratory well | |
| CN112016201B (en) | DFOS strain-based deep stope advanced support pressure evolution model reconstruction method | |
| CN112412434B (en) | Improved loose sandstone ground stress calculation method | |
| Guo et al. | Development of a pressure coring system for the investigation of deep underground exploration | |
| CN110502794B (en) | Prediction method for high-ground stress concentration zone damage mode of surrounding rock at lower part of large-scale slow-dip angle weak structural surface | |
| CN115169163B (en) | Hydrofracturing ground stress calculation method considering irregular drilling hole and fracture shape | |
| CN112861393B (en) | Method for constructing envelope curve of performance of high-temperature and high-pressure packer | |
| Shang et al. | Research on influencing factors of effective gas extraction radius in coal mine based on multiple linear regression | |
| CN109707362B (en) | Fixed-point fracturing method for residual oil in longitudinal single sand body of mining and submerging old well reservoir | |
| CN114458274B (en) | Rock capacity expansion method | |
| CN111709065B (en) | Method for determining hole distance of ultra-front deep hole grouting drilling under complex surrounding environment | |
| Chen et al. | Case study: Treating parameters optimization in casing deformation wells of shale gas in Sichuan Basin | |
| CN114036703A (en) | Method for analyzing strength of salt gypsum rock stratum deep well petroleum casing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |