Hydraulic fracturing crack targeted extension control method

Abstract

The invention discloses a hydraulic fracturing crack targeted extension control method, which relates to the technical field of hydraulic fracturing and comprises the following steps: S1, selecting a to-be-fractured well, and selecting a monitoring well for later use by taking underground coordinates of a fractured section as a center; s2, before hydrofracture, starting various preparatory works of a monitoring well, obtaining basic data of a fractured well, and performing hydrofracture engineering and construction design through hydrofracture related design software in combination with regional construction experience; s3, after fracturing begins, synchronously picking up various underground data through three monitoring technologies in the monitoring well, and transmitting the data to a ground hydraulic fracturing crack monitoring system, a ground stress analysis system and an oil and gas enrichment zone analysis and identification processing system; and S4, after the data are processed by the analysis and recognition processing system in the step S3, whether manual intervention is needed or not is judged until targeted extension is conducted on the hydrofracture crack, targeted fracturing is achieved, and the problem that in the prior art, the hydrofracture technology is difficult to directly guide field practice is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic fracturing, and particularly to a method for controlling the targeted extension of hydraulic fracturing fractures. Background Art

[0002] Unconventional oil and gas are one of the important alternative oil and gas resources in China. Due to the extremely poor reservoir physical properties such as porosity, permeability, and saturation, reservoir stimulation must be carried out to achieve industrial exploitation. In the field, hydraulic fracturing technology is usually used to create a large-scale artificial fracture network, thereby increasing the matrix conductivity and achieving the purpose of improving resource utilization rate and recovery rate, and ultimately realizing efficient development.

[0003] The quality of hydraulic fracturing in unconventional reservoirs mainly depends on whether the fracturing fractures can effectively communicate with the target oil and gas enrichment areas. During the on-site production process, there is an urgent need for targeted extension control of hydraulic fracturing fractures in multi-cluster fracturing of heterogeneous reservoirs in segments, refracturing of unconventional oil and gas reservoirs, and fracturing of fractured-vuggy carbonate rock oil and gas reservoirs to achieve "targeted fracturing" stimulation. Research by Guo Tiankui et al. shows that "targeted fracturing" refers to, on the one hand, screening out easy-to-fracture engineering sweet spots based on geological sweet spots and preferentially implementing fracturing in the target area; on the other hand, for target layers that are difficult to locate or effectively stimulate, artificial control means are used to induce the targeted extension of artificial fractures to achieve "fracturing where it is pointed". The geological conditions of oil and gas resources in China are diverse and complex. Using conventional fracturing design methods often makes it difficult to achieve efficient and low-cost exploitation. How to use artificial control means to effectively achieve the targeted extension of fractures and communicate with oil and gas enrichment areas has become the core and key in the field of oil and gas reservoir stimulation.

[0004] To achieve the targeted extension control of hydraulic fracturing fractures, a set of scientific and effective methods are needed. By analyzing three aspects: geological sweet spots (oil and gas enrichment areas), engineering sweet spots (simulation of rock mechanical parameters and in-situ stress fields), and real-time monitoring of artificial fractures (fracturing monitoring and analysis, fracture initiation and propagation, fracture location and geometry, and distribution laws), the optimal azimuth of fracture extension and the key technical parameters for controlling the extension of artificial fractures can be obtained to guide reservoir fracturing construction.

[0005] In the prior art, documents such as CN109033674A and CN112610198A disclose some methods for optimizing fracture parameters and experimental devices for achieving targeted fracturing acidification. They all use numerical simulation and indoor experimental simulation means, and do not systematically consider the collaborative work of oil and gas enrichment identification, in-situ stress field change simulation, artificial fracture monitoring, etc., resulting in a large uncertainty in simulation results and being difficult to directly guide on-site practice. Summary of the Invention

[0006] The object of the present invention is to provide a method for controlling the targeted extension of hydraulic fracturing fractures, which solves the problems in the prior art that mainly rely on numerical simulation and indoor experimental simulation result amplification technology, with large uncertainties in simulation results and difficulty in directly guiding on-site practice.

[0007] The present invention is realized through the following technical solutions: A method for controlling the targeted extension of hydraulic fracturing fractures includes the following steps: S1. Select the well to be fractured. Taking the underground coordinates of the fracturing section as the center, select 3 or more monitoring wells around. The distance between the underground monitoring points of the monitoring wells and the fracturing section of the fracturing well needs to be less than the minimum monitoring distance of each monitoring technology for standby. S2. Before hydraulic fracturing, start various preparatory work of the monitoring wells, obtain the basic data of the fracturing well, and combine with the regional construction experience. Through the relevant design software for hydraulic fracturing, carry out the engineering and construction design of hydraulic fracturing. S3. After the fracturing starts, the three monitoring technologies in the monitoring wells simultaneously pick up various downhole data and transmit them to the ground analysis and identification processing system for hydraulic fracturing fracture monitoring, in-situ stress analysis, and oil and gas enrichment zone. S4. After the data is processed by the analysis and identification processing system in step S3, various downhole and inter-well information is displayed in real time. When the fracture extension direction is towards the inter-well oil and gas enrichment zone, no manual intervention is required; otherwise, an artificial hydraulic fracturing fracture targeted extension control method is adopted for intervention until the hydraulic fracturing fracture extends targetedly to achieve targeted fracturing.

[0008] Further, in step S4, the downhole and inter-well information includes the distribution of oil and gas enrichment zones, the current change of in-situ stress, the current artificial fracture morphology and extension direction.

[0009] Further, in step S4, the artificial hydraulic fracturing fracture targeted extension control intervention method is: adopting one or several of temporary plugging and diversion fracturing, hydraulic pulse fracturing, variable displacement / variable viscosity fracture extension control, salt crystallization plugging and diversion, water-soluble swelling plugging, roof and floor shielding, curable material plugging, phase change proppant, electromagnetic induction type deformable proppant / fracturing fluid, liquid nitrogen / CO 2 Injecting cooling-induced plugging or changing the rock mechanical properties, slug sand addition, intermittent fracturing, alternating dynamic load treatment, variable displacement acid pretreatment method, hot and cold alternating treatment to change the rock mechanical properties, ultrasonic / electromagnetic wave treatment method for artificial intervention. While carrying out artificial intervention, real-time monitoring, data processing and analysis are carried out until the hydraulic fracturing fracture extends targetedly to achieve targeted fracturing.

[0010] Further, in step S1, the monitoring technology is real-time monitoring, data transmission and analysis technology, mainly including three types: One is the hydraulic fracturing fracture monitoring method, which is used to characterize the initiation and extension geometric dimensions, morphology, orientation and other characteristics of artificial fractures during the hydraulic fracturing process; Two is the downhole in-situ stress monitoring method, which is used to characterize the magnitude and orientation of the in-situ stress downhole in the fracturing well and the monitoring well, and provide basic parameters for the design of the artificial fracture extension direction control scheme; Three is the inter-well oil and gas enrichment zone monitoring and identification method, which is used to characterize the favorable areas of oil and gas enrichment in the inter-well reservoir and determine the optimal extension orientation and extension distance of the fractures.

[0011] Further, the hydraulic fracturing fracture monitoring method is used to characterize the initiation and extension geometric dimensions, morphology, orientation and other characteristics of artificial fractures during the hydraulic fracturing process, and adopts one or a combination of methods such as radioactive tracer method, well temperature logging, borehole imaging logging, downhole television, downhole distributed optical fiber sensing, closed wellbore pressure fluctuation monitoring, well diameter logging, downhole / ground microseismic, downhole inclination of surrounding wells, surface inclinometer, construction well inclinometer, and wide area electromagnetic method for fracturing monitoring.

[0012] Further, the hydraulic fracturing fracture monitoring method can be combined with the in-fracture temperature enhancement method, energy enhancement method, and vibration enhancement method to determine the position of the fracture front.

[0013] Further, the method for obtaining basic parameters through the downhole in-situ stress monitoring method includes the following steps: a. Adopt the method of double-packing and single-packet small-scale hydraulic fracturing injection test to test the magnitude of the in-situ stress at the monitoring point position required for the monitoring well, and determine the in-situ stress orientation through imaging logging and multi-arm well diameter method, and comprehensively obtain the initial value of the in-situ stress at the monitoring point position. The initial value of the in-situ stress includes the magnitude and orientation information of the in-situ stress; b. Take the position closest to the fracturing section in the monitoring well as the monitoring point, use tools to level and smooth the monitoring point position through reaming operation, lower the stress test sensor, optical fiber / cable, motor, push device, and gyroscope orientation device to the monitoring point position, and through gyroscope orientation, the action of the motor and the push device, make the stress sensor fit with the wellbore wall surface and apply a thrust of 3-5 MPa; c. The stress sensor transmits the collected data to the ground in-situ stress analysis and processing system through optical fiber and cable to monitor the change of in-situ stress downhole in real time; d. Install stress sensors in multiple monitoring wells in sequence according to steps a~c, and the data collected by the sensors are uniformly summarized to the ground in-situ stress analysis and processing system for analysis and processing; e. The stress sensor starts continuous monitoring after the double-packing and single-packet small-scale hydraulic fracturing injection test until 30 days after the fracturing ends.

[0014] Further, there is at least one stress sensor at the same monitoring position.

[0015] Further, the stress sensor is an ordinary stress sensor or a distributed optical fiber stress and strain sensor.

[0016] Further, the method for determining the optimal extension azimuth and extension distance of fractures by the inter-well oil and gas enrichment zone monitoring and identification method includes the following steps: a1. Lower the instruments used for inter-well oil and gas enrichment zone monitoring into each monitoring well. The distance between the underground monitoring points of the monitoring well and the fracturing section should be less than the minimum monitoring distance of each monitoring technology to ensure the effective collection of various monitoring data; b1. For the well groups with injection-production well patterns, materials that enhance the signal intensity of the monitoring technology detection need to be injected along with water or gas at the beginning stage of water injection or gas injection, so as to accurately analyze the distribution of the oil and gas enrichment zone during fracturing and determine the positions of the water drive and gas drive fronts; c1. After the corresponding data are collected from multiple monitoring wells according to steps a1 to c1, they are uniformly summarized to the ground inter-well oil and gas enrichment zone identification and analysis system for analysis.

[0017] Further, infill wells are drilled between the monitoring wells and cores are taken to obtain the remaining oil and gas conditions between the wells.

[0018] Further, the monitoring well should adopt open-hole completion as the monitoring well.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. In the present invention, a method for controlling the targeted extension of hydraulic fracturing fractures is proposed. Based on a variety of on-site detection means, it realizes the identification of the inter-well oil and gas enrichment zone, the measurement of the in-situ stress between wells, and the monitoring of hydraulic fracturing fractures. The detection results can be combined with the numerical simulation results to verify each other and improve the accuracy.

[0020] 2. In the present invention, through on-site detection means, it overcomes the technical deficiencies of the traditional numerical simulation and experimental simulation studies, such as large uncertainties in the simulation results and difficulty in directly guiding on-site practice. This method optimizes the fracture extension azimuth through the identification of the inter-well oil and gas enrichment zone, determines the artificial intervention plan for fractures through in-situ stress measurement and hydraulic fracturing fracture monitoring, and guides the selection of the method for controlling the targeted extension of hydraulic fracturing fractures. Through continuous monitoring, artificial intervention and control during the extension process of hydraulic fracturing fractures, it finally realizes the targeted extension of hydraulic fracturing fractures to the oil and gas enrichment zone, achieves targeted fracturing, and improves the fracture-controlled reserves and the single-well production.

[0021] 3. In the present invention, it is applicable to various well types, adopts a variety of monitoring means, and the various monitoring results can verify each other.

[0022] IV. In the present invention, it is possible to achieve the targeted extension control of hydraulic fracturing fractures, realizing the "targeted fracturing" transformation, i.e., "fracturing exactly where it is pointed at". The technology is advanced and highly innovative.

[0023] V. In the present invention, based on various on-site detection means, the identification of the oil and gas enrichment zones between wells, the measurement of the in-situ stress between wells, and the monitoring of hydraulic fracturing fractures are realized. The detection results can be used in combination with the numerical simulation results to verify each other and improve the accuracy.

[0024] VI. In the present invention, the technical deficiencies of traditional numerical simulation and experimental simulation studies, such as large uncertainties in simulation results and difficulty in directly guiding on-site practices, are overcome.

[0025] VII. In the present invention, each monitoring well should preferably adopt open-hole completion to avoid the influence of the casing on data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic diagram of the relative positions of a vertical well fracturing well and a monitoring well.

[0027] Figure 2 FIG. is a schematic diagram of the relative positions of a horizontal well fracturing well and a monitoring well. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be further described in detail below in conjunction with the embodiments, but the embodiments of the present invention are not limited thereto.

[0029] Embodiment 1 For the convenience of the public to understand the technical solution, this embodiment takes a current well to be fractured as an example to further illustrate the solution. Specifically, a method for controlling the targeted extension of hydraulic fracturing fractures includes the following steps: Step 1: Select the well to be fractured. With the underground coordinates of the fracturing section as the center, select 3 or more monitoring wells around. The distance between the underground monitoring points of the monitoring wells and the fracturing section of the fracturing well needs to be less than the minimum monitoring distance of each monitoring technology for later use.

[0030] In this step, when selecting the well to be fractured, the well types such as vertical wells, directional wells, and horizontal wells are not limited. With the underground coordinates of the fracturing section as the center, select 3 or more monitoring wells around. When the well to be fractured is a vertical well or a horizontal well respectively, the schematic diagrams of the relative positions of the selected fracturing well and the monitoring well are shown in Figure 1 and Figure 2 . At the same time, it is necessary to ensure that the distance between the underground monitoring points of the monitoring wells and the fracturing section is less than the minimum monitoring distance of each monitoring technology to ensure the effective acquisition of various monitoring data.

[0031] In this step, the above-mentioned monitoring technology is real-time monitoring, data transmission, and analysis technology. It mainly includes three types: One is the hydraulic fracturing fracture monitoring method, which is used to characterize the initiation and extension geometric dimensions, morphology, orientation and other characteristics of artificial fractures during the hydraulic fracturing process; The second is the downhole in-situ stress monitoring method, which is used to characterize the magnitude and orientation of the downhole in-situ stress in the fracturing well and the monitoring well, and provide basic parameters for the design of the artificial fracture extension direction control scheme; The third is the inter-well oil and gas enrichment zone monitoring and identification method, which is used to characterize the favorable areas of oil and gas enrichment in the inter-well reservoir, and determine the optimal extension orientation and extension distance of the fractures.

[0032] Among them, the hydraulic fracturing fracture monitoring method can be one or a combination of the following technologies, aiming to characterize the initiation and extension geometric dimensions, morphology, orientation and other characteristics of artificial fractures during the hydraulic fracturing process. It mainly includes radioactive tracer method, well temperature logging, borehole imaging logging, downhole television, downhole distributed optical fiber sensing (DTS, DAS, distributed optical fiber temperature and strain monitoring BOTDA), closed wellbore pressure fluctuation monitoring, caliper logging, downhole / ground microseismic, downhole inclination of surrounding wells, surface inclinometer, construction well inclinometer, wide area electromagnetic method for fracturing monitoring, etc.

[0033] The specific operation methods of the above monitoring technologies are conventional operation methods in the industry and will not be elaborated here again. In order to improve the accuracy and precision of fracture monitoring, the hydraulic fracturing fracture monitoring can be combined with enhanced methods such as in-fracture temperature, energy, vibration, etc., including but not limited to: using fixed-point and timed triggering of in-fracture micro-blasting materials (coated magnesium powder, coated aluminum powder, coated liquid gunpowder, etc.) carried by the fracturing fluid, and generating strong vibrations through in-fracture micro-blasting positioning, so that fracture monitoring technologies such as microseismic can pick up signals. The micro-blasting materials can be added in the preflush stage, and this method is mainly used to determine the position of the fracture front.

[0034] Among them, the downhole in-situ stress monitoring method mainly uses stress sensors to monitor the corresponding signals downhole and finally obtain the required basic parameters. The specific method includes the following steps: a. Before the downhole stress sensor is lowered, the magnitude of the in-situ stress at the monitoring point position required for the monitoring well is tested by means of double-packer single-slip small-scale hydraulic fracturing injection test, and the in-situ stress orientation is determined by means of imaging logging, multi-arm caliper, etc., and the initial value (magnitude, orientation) of the in-situ stress at the monitoring point position is comprehensively obtained.

[0035] b. At the position closest to the fracturing section in the monitoring well as the monitoring point, use tubing, coiled tubing, wireline operations, etc. with tools to level and smooth the monitoring point position through reaming operations, and use tubing, coiled tubing, wireline operations, etc. with stress test sensors, optical fiber / cable, motor, push device, gyroscopic orientation device, etc. to lower to the monitoring point position. Through gyroscopic orientation, the motor and push device act to fit the stress sensor to the wellbore wall surface and apply a thrust of 3-5 MPa.

[0036] c. The data collected by the stress sensors is transmitted to the ground in-situ stress analysis and processing system through optical fibers, cables, etc., to monitor the in-situ stress changes underground in real time.

[0037] d. Multiple monitoring wells are successively equipped with stress sensors according to this procedure, and the data collected by the sensors is uniformly summarized and analyzed by the ground in-situ stress analysis and processing system.

[0038] e. The stress sensors start continuous monitoring after the double-packer single-slip small hydraulic fracturing injection test and continue until 30 days after the end of the fracturing.

[0039] Furthermore, when necessary, multiple stress sensors can be placed at the same monitoring position to test the stress changes in different directions. The stress sensors can be of various types such as ordinary stress sensors, distributed fiber optic stress and strain sensors, etc.

[0040] Among them, the method for monitoring and identifying the inter-well oil and gas enrichment zones mainly uses various methods for identifying the frontiers of oil and water migration and the enrichment zones of remaining oil and gas saturation, such as deep resistivity logging, deep radioactive detection, deep magnetic detection, pulsed neutron full-spectrum logging, acoustic far-detection logging, and integrated seismic exploration and geological engineering technologies.

[0041] The method for determining the optimal extension azimuth and extension distance of fractures in the method for monitoring and identifying the inter-well oil and gas enrichment zones includes the following steps: a1. The instruments used for monitoring the inter-well oil and gas enrichment zones need to be lowered into each monitoring well. The distance between the underground monitoring points in the monitoring well and the fracturing section should be less than the minimum monitoring distance of each monitoring technology to ensure the effective collection of various monitoring data.

[0042] b1. To ensure the identification accuracy of the inter-well oil and gas enrichment zones, for well groups with injection-production well patterns, it is necessary to co-inject materials such as magnetic, high-resistance, and radioactive materials (in the form of solutions, emulsions, foams, etc.) at the beginning stage of water injection and gas injection. These materials follow the injected water and gas to reach the frontiers of water flooding and gas flooding, enhancing the signal intensity detected by the monitoring technology, facilitating the analysis of the distribution of oil and gas enrichment zones during fracturing, especially determining the positions of the frontiers of water flooding and gas flooding, having a higher resolution for identifying oil and gas enrichment zones, and improving the identification accuracy and detection range.

[0043] When conditions permit, infill wells can be drilled between wells and cored to truly understand the remaining oil and gas situation between wells. There can be multiple infill wells with various distribution methods, making the final evaluation results more accurate.

[0044] c1. Multiple monitoring wells are operated according to steps a1~c1, and the corresponding data is collected and uniformly summarized and analyzed by the ground inter-well oil and gas enrichment zone identification and analysis system.

[0045] Step 2: Before hydraulic fracturing, start all preparatory work for the monitoring wells, obtain the basic data of the fracturing well, and combine with the regional construction experience. Through researching software related to hydraulic fracturing information, conduct hydraulic fracturing engineering and construction design.

[0046] Before hydraulic fracturing, start all preparatory work for the monitoring wells: obtain the background information before fracturing through hydraulic fracturing fracture monitoring technology, obtain the in-situ stress magnitude and azimuth information of the monitoring points before fracturing through downhole in-situ stress monitoring technology, and identify the favorable areas of oil and gas enrichment in the reservoir between wells through the monitoring and identification technology for oil and gas enrichment zones between wells.

[0047] Then, based on the basic data such as the geological characteristics, reservoir physical properties, rock mechanics, and in-situ stress parameters (geological sweet spots, engineering sweet spots) that have been mastered, draw on the regional construction experience, and use mature commercial hydraulic fracturing software such as FracproPT and Meyer to conduct hydraulic fracturing engineering and construction design.

[0048] Step 3: After fracturing starts, the three monitoring technologies in the monitoring wells simultaneously pick up various downhole data and transmit them to the ground analysis and identification processing systems for hydraulic fracturing fracture monitoring, in-situ stress analysis, and oil and gas enrichment zone analysis.

[0049] Step 4: After the data is processed by the analysis and identification processing system in Step 3, the downhole and inter-well information is displayed in real time. When the fracture extension direction is towards the inter-well oil and gas enrichment zone, no manual intervention is required; otherwise, an artificial hydraulic fracturing fracture targeted extension control method is adopted for intervention until the hydraulic fracturing fracture extends in a targeted manner to achieve targeted fracturing.

[0050] Specifically, after processing multi-type data, various information such as the distribution of the inter-well oil and gas enrichment zone, the current change in in-situ stress (considering the induced stress of artificial fractures, temperature-induced stress caused by the cooling of fracturing fluid, etc.), the current artificial fracture morphology and extension direction, etc. are displayed in real time. When the fracture extension direction is towards the inter-well oil and gas enrichment zone, no manual intervention is required; otherwise, an artificial hydraulic fracturing fracture targeted extension control technology is adopted.

[0051] In this step, the artificial hydraulic fracturing fracture targeted extension control and intervention method is as follows: adopt temporary plugging and diversion fracturing, hydraulic pulse fracturing, variable displacement / variable viscosity fracture extension control, salt crystallization plugging and diversion, water-soluble swelling plugging, top and bottom plate shielding (floaters, sinkers), curable material plugging (various resins), phase change proppants, electromagnetic induction type deformable proppants / fracturing fluids, liquid nitrogen / CO 2One or several of artificial interventions such as injection cooling-induced plugging or changing rock mechanical properties, slug sand addition, intermittent fracturing, alternating dynamic load treatment, variable displacement acid pre-treatment method, hot and cold alternating treatment to change rock mechanical properties, ultrasonic / electromagnetic wave treatment method are carried out. During the artificial intervention, real-time monitoring, data processing and analysis are carried out until the hydraulic fracturing cracks are targeted to extend, realizing targeted fracturing.

[0052] During the actual monitoring process, if necessary, the results obtained from the monitoring technology can also be mutually verified with the results of numerical simulation and laboratory experiment simulation.

[0053] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention falls within the protection scope of the present invention.

Claims

1. A method for controlling the targeted extension of hydraulic fracturing fractures, characterized in that, it includes the following steps: S1. Select the well to be fractured. With the underground coordinates of the fracturing section as the center, select 3 or more monitoring wells around. The distance between the underground monitoring points of the monitoring wells and the fracturing section of the fracturing well needs to be less than the minimum monitoring distance of each monitoring technology for later use; S2. Before hydraulic fracturing, start various preparatory work of the monitoring wells, obtain the basic data of the fracturing well, and combine with the regional construction experience. Through the relevant design software for hydraulic fracturing, carry out the engineering and construction design of hydraulic fracturing; S3. After the fracturing starts, the three monitoring technologies in the monitoring wells simultaneously pick up various downhole data and transmit them to the ground analysis and identification processing system for hydraulic fracturing fracture monitoring, in-situ stress analysis, and oil and gas enrichment zone analysis; S4. After the data is processed by the analysis and identification processing system in step S3, various downhole and inter-well information is displayed in real time. When the fracture extension direction is towards the inter-well oil and gas enrichment zone, no manual intervention is required; Otherwise, the artificial hydraulic fracturing fracture targeted extension control method is adopted for intervention until the hydraulic fracturing fracture extends in a targeted manner to achieve targeted fracturing.

2. A method for controlling the targeted extension of hydraulic fracturing fractures according to claim 1, characterized in that: In step S4, the downhole and inter-well information includes the distribution of oil and gas enrichment zones, the current change of in-situ stress, the current artificial fracture shape and extension direction.

3. A method for controlling the targeted extension of hydraulic fracturing fractures according to claim 2, characterized in that: In step S4, the artificial hydraulic fracturing fracture targeted extension control intervention method is as follows: using one or several of temporary plugging diversion fracturing, hydraulic pulse fracturing, variable displacement / variable viscosity fracture extension control, salt crystallization plugging diversion, water-soluble swelling plugging, roof and floor shielding, curable material plugging, phase change proppants, electromagnetic induction type deformable proppants / fracturing fluids, liquid nitrogen / CO 2 injection cooling-induced plugging or changing rock mechanical properties, slug sand addition, intermittent fracturing, alternating dynamic load treatment, variable displacement acid pretreatment method, hot and cold alternating treatment to change rock mechanical properties, ultrasonic / electromagnetic wave treatment methods for artificial intervention. During the artificial intervention, real-time monitoring, data processing and analysis are carried out until the hydraulic fracturing fracture extends in a targeted manner to achieve targeted fracturing.

4. A method for controlling the targeted extension of hydraulic fracturing fractures according to claim 1, characterized in that: In step S1, the monitoring technology is real-time monitoring, data transmission and analysis technology, mainly including three types: One is the hydraulic fracturing fracture monitoring method, which is used to depict the characteristics of artificial fracture initiation and extension geometry, shape, orientation, etc. during hydraulic fracturing; The second is the downhole in-situ stress monitoring method, which is used to depict the magnitude and orientation of the downhole in-situ stress of the fracturing well and the monitoring wells, and provide basic parameters for the design of the artificial fracture extension direction control scheme; The third is the inter-well oil and gas enrichment zone monitoring and identification method, which is used to depict the favorable areas of oil and gas enrichment in the inter-well reservoir and determine the optimal extension orientation and extension distance of the fracture.

5. A method for controlling the targeted extension of hydraulic fracturing fractures according to claim 4, characterized in that: The hydraulic fracturing fracture monitoring method is used to depict the characteristics of artificial fracture initiation and extension geometry, shape, orientation, etc. during hydraulic fracturing, and adopts one or a combination of methods such as radioactive tracer method, well temperature logging, borehole imaging logging, downhole television, downhole distributed optical fiber sensing, closed wellbore pressure fluctuation monitoring, well diameter logging, downhole / ground microseismic, downhole inclination of surrounding wells, surface inclinometer, inclination meter of the construction well, and wide area electromagnetic method for fracturing monitoring.

6. A method for controlling the targeted extension of hydraulic fracturing fractures according to claim 5, characterized in that: The hydraulic fracturing fracture monitoring method can be combined with the in-fracture temperature enhancement method, energy enhancement method, and vibration enhancement method to determine the position of the fracture front.

7. A method for controlling the targeted extension of hydraulic fracturing fractures according to claim 4, characterized in that: The method for obtaining basic parameters through the downhole in-situ ground stress monitoring method includes the following steps: a. Adopt the method of double-packer single-slip small-scale hydraulic fracturing injection test to test the magnitude of the ground stress at the monitoring point positions required for the monitoring well. Determine the ground stress azimuth through imaging logging and multi-arm caliper methods, and comprehensively obtain the initial ground stress values at the monitoring point positions. The initial ground stress values include the magnitude and azimuth information of the ground stress. b. Take the position closest to the fracturing section in the monitoring well as the monitoring point. Use tools to level and smooth the monitoring point position through reaming operations. Lower the stress test sensor, optical fiber / cable, motor, pushing device, and gyroscopic orientation device to the monitoring point position. Through gyroscopic orientation, the actions of the motor and the pushing device, fit the stress sensor to the wellbore wall surface and apply a thrust of 3 - 5 MPa. c. The stress sensor transmits the collected data to the ground stress analysis and processing system through optical fiber and cable to monitor the changes in downhole ground stress in real time. d. Install stress sensors in multiple monitoring wells in sequence according to steps a~c. The data collected by the sensors are uniformly summarized and analyzed by the ground stress analysis and processing system. e. The stress sensor starts continuous monitoring after the double-packer single-slip small-scale hydraulic fracturing injection test until 30 days after the fracturing ends.

8. A method for controlling the targeted extension of hydraulic fracturing cracks according to claim 7, characterized in that: There is at least one stress sensor at the same monitoring position.

9. A method for controlling the targeted extension of hydraulic fracturing cracks according to claim 8, characterized in that: The stress sensor is an ordinary stress sensor or a distributed optical fiber stress and strain sensor.

10. A method for controlling the targeted extension of hydraulic fracturing cracks according to claim 4, characterized in that: The method for determining the optimal extension azimuth and extension distance of the crack through the inter-well oil and gas enrichment zone monitoring and identification method includes the following steps: a1. Lower the instruments used for inter-well oil and gas enrichment zone monitoring into each monitoring well. The distance between the underground monitoring point in the monitoring well and the fracturing section should be less than the minimum monitoring distance of each monitoring technology to ensure the effective collection of various monitoring data. b1. For well groups with injection-production well patterns, it is necessary to accompany the injection of materials that enhance the signal intensity of the monitoring technology at the beginning stage of water injection and gas injection, so as to accurately analyze the distribution of the oil and gas enrichment zone during fracturing and determine the positions of the water drive and gas drive fronts. c1. After multiple monitoring wells collect corresponding data according to steps a1~c1, they are uniformly summarized and analyzed by the ground inter-well oil and gas enrichment zone identification and analysis system.

11. A method for controlling the targeted extension of hydraulic fracturing cracks according to claim 10, characterized in that: Drill infill wells between the monitoring wells, take cores, and obtain the remaining oil and gas conditions between the wells.

12. A method for controlling the targeted extension of hydraulic fracturing cracks according to claim 1, characterized in that: The monitoring well should adopt open-hole completion as the monitoring well.

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