Method for judging plugging position in temporary plugging particle seam

Abstract

The invention relates to a method for judging a plugging position in a temporary plugging particle seam. The method comprises the following steps: S1, counting temporary plugging construction parameters and a temporary plugging effect evaluation result of a fractured well in a target block; s2, according to the temporary plugging construction parameters and the temporary plugging effect evaluation result, performing conversion to obtain input parameters required for simulating in-seam migration-plugging of temporary plugging particles; s3, establishing a temporary plugging particle in-fracture migration-plugging model, carrying out simulation work, and obtaining temporary plugging particle in-fracture migration-plugging behaviors and forms in a given fracturing fracture space; and S4, according to the migration-plugging behavior and form in the temporary plugging particle seam, the plugging position in the temporary plugging particle seam is judged. According to the method, the temporary plugging particle in-seam migration-plugging model is established by adopting the historical fracturing temporary plugging data of the target block, and the plugging position in the temporary plugging particle seam can be scientifically and accurately judged according to the temporary plugging particle in-seam migration-plugging behavior and form obtained through simulation.

Description

Technical Field

[0001] The invention relates to the field of oil and gas field production increase and transformation, and in particular to a method for determining a plugging position in a temporary plugging particle seam. Background Art

[0002] Temporary plugging particles are one of the solid phase materials widely used in the fracture mouth + fracture internal temporary plugging fracturing process. The fracture mouth temporary plugging process uses temporary plugging particles to plug the dominant perforation cluster or form a plugging layer at the entrance of the dominant perforation cluster fracture, inhibiting the expansion of the dominant perforation cluster fracture and activating the expansion of the inferior perforation cluster fracture, so as to achieve the purpose of promoting the balanced expansion of multiple clusters of hydraulic fractures; while the fracture internal temporary plugging process uses temporary plugging particles to form a plugging layer in the dominant fracture, inhibiting or preventing the excessive expansion of the dominant fracture, causing the dominant fracture to temporarily plug and turn or the initiation and expansion of new fractures, so as to achieve the purpose of increasing the complexity of hydraulic fractures.

[0003] Since the on-site fracturing crack monitoring method cannot directly evaluate the plugging position of temporary plugging particles in the crack, the on-site fracturing engineers mainly use the pressure increase after temporary plugging and the difference in crack monitoring signals before and after temporary plugging to determine whether the temporary plugging particles have reached the expected plugging position in the crack and whether the temporary plugging process is effective. However, the pressure increase after temporary plugging is affected by many factors and cannot directly reflect the plugging position of temporary plugging particles in the crack and the crack initiation and expansion after temporary plugging. Therefore, there has been a lack of a scientific and accurate method to determine the plugging position of temporary plugging particles in the crack. Summary of the invention

[0004] In view of the above problems, the present invention provides a method for determining the plugging position in a temporary plugging particle seam.

[0005] The present invention adopts the following technical solutions:

[0006] In one aspect, the present invention provides a method for determining a plugging position in a temporary plugging particle gap, comprising the following steps:

[0007] S1. Count the temporary plugging construction parameters and temporary plugging effect evaluation results of the fractured wells in the target block;

[0008] S2. According to the temporary plugging construction parameters and the temporary plugging effect evaluation results, the input parameters required for simulating temporary plugging particle migration and plugging are converted;

[0009] S3. Establish a temporary plugging particle migration and plugging model, carry out simulation work, and obtain the temporary plugging particle migration and plugging behavior and morphology in a given fracture space;

[0010] S4. Determine the sealing position in the temporary plugging particle seam based on the migration and sealing behavior and morphology of the temporary plugging particle seam.

[0011] Preferably, the construction parameters in step S1 include one or more parameters of the number of single fracturing layers in vertical wells / number of single-stage fracturing clusters in horizontal wells, temporary plugging particle size, temporary plugging particle density, vertical well multi-layer / horizontal well single-stage delivery quality, delivery fluid volume, delivery displacement, delivery time, boosting displacement, boosting time, temporary plugging construction pressure under delivery + boosting time, and fracturing fluid viscosity.

[0012] Preferably, the temporary plugging effect evaluation result in step S1 includes one or more parameters of the pressure boosting effect after temporary plugging, the single-side size of the microseismic monitoring wave body after temporary plugging, the single-side size of the wide-area electromagnetic monitoring wave body after temporary plugging, and the pump-stop pressure drop monitoring data.

[0013] Preferably, the input parameters in step S2 include temporary plugging particle parameters, temporary plugging construction parameters, and crack parameters.

[0014] Preferably, in step S3, a temporary blocking particle migration-blocking model is established, including:

[0015] S31, based on the crack parameters in the input parameters, establishing a single-wing crack space physical model of corresponding size;

[0016] S32. Constructing a corresponding temporary plugging particle migration-plugging mathematical model based on the single-wing fracture space physical model.

[0017] Preferably, the simulation work in step S3 includes:

[0018] The plugging conditions of temporary plugging particles (ratio of temporary plugging particle size to crack width) were changed to simulate the migration and plugging process of temporary plugging particles under preset temporary plugging particle parameters, temporary plugging construction parameters and crack parameters.

[0019] Preferably, obtaining the migration and plugging behavior and morphology of temporary plugging particles in a given fracture space in step S3 includes:

[0020] Obtain the initial time of intra-fracture migration and plugging behavior of temporary plugging particles under different plugging conditions;

[0021] Obtain the time it takes for temporary plugging particles to completely plug the fracture in the fracture height direction under different plugging conditions;

[0022] Obtain the migration and plugging morphology of temporary plugged particles in the cracks under different plugging conditions and the same delivery + pressurization time.

[0023] Preferably, determining the blocking position in the temporary blocking particle gap in step S4 includes:

[0024] 1) If the initial time of temporary plugging particles' migration and plugging behavior in the fracture or the time of temporary plugging particles' complete plugging behavior in the fracture height direction in the fracture is less than the delivery time, then the temporary plugging particles will not plug under this plugging condition, and the position where temporary plugging particles plug in the fracture is not the position where temporary plugging particles plug in the fracture, and the position where temporary plugging particles actually plug under fracturing construction conditions is far from the position where temporary plugging particles plug under the simulation conditions of migration and plugging in the fracture;

[0025] 2) If the initial time of temporary plugging particles migrating and plugging in the fracture is greater than or equal to the temporary plugging particle delivery time, and less than the temporary plugging particle delivery + pressure increase time, but the time of temporary plugging particles completely plugging in the fracture height direction is greater than or equal to the temporary plugging particle delivery + pressure increase time, then the temporary plugging particles will plug under this plugging condition, but not at the position where the temporary plugging particles plug in the fracture, and the position where the temporary plugging particles actually plug under the fracturing operation condition is close to the position where the temporary plugging particles plug under the simulation condition of migration and plugging in the fracture;

[0026] 3) If the initial time of temporary blocking particles' migration and plugging behavior in the fracture is greater than or equal to the temporary blocking particle delivery time, and less than the temporary blocking particle delivery + pressure increase time, and the time of temporary blocking particles' complete plugging behavior in the fracture height direction in the fracture is less than the temporary blocking particle delivery + pressure increase time, then the temporary blocking particles will plug under this plugging condition, and the location where the temporary blocking particles plug in the fracture may be;

[0027] 4) If the pressure increase effect after temporary plugging is small, and the pressure increase after temporary plugging is less than 3MPa, the temporary plugging particles are simulated to completely block the fracture height direction under the plugging condition under the delivery + pressure increase time, then the temporary plugging particles will block under this blocking condition, but the actual blocking position of the temporary plugging particles under the fracturing construction condition is far from the blocking position under the temporary plugging particle migration-blocking simulation condition;

[0028] 5) If the pressure increase effect after temporary plugging is large, and the pressure increase after temporary plugging is greater than or equal to 3MPa, the temporary plugging particles simulated under this plugging condition do not completely plug in the fracture height direction under the delivery + pressure increase time, which means that the temporary plugging particles will plug under this plugging condition, but the actual plugging position of the temporary plugging particles under the fracturing construction condition is close to the position where the temporary plugging particles migrate in the fracture and plug under the plugging simulation condition;

[0029] 6) Excluding the temporary plugging particle migration-sealing results that meet 1) to 2) and 4) to 5), the migration-sealing behavior and morphology of temporary plugging particles in fractures under different sealing conditions and the same delivery + pressurization time are compared. If the initial time of the temporary plugging particle migration-sealing behavior under the sealing condition is between the temporary plugging particle delivery time and the delivery + pressurization time, the time for the temporary plugging particles to completely seal in the fracture height direction is less than the temporary plugging particle delivery + pressurization time, and the migration-sealing morphology of temporary plugging particles in fractures is relatively matched with the pressurization effect, it means that the actual sealing position of the temporary plugging particles under the fracturing construction conditions is close to the sealing position of the temporary plugging particles under the simulation conditions of migration-sealing in fractures, and it is judged to be the position where the temporary plugging particles are sealed in the fracture.

[0030] On the other hand, the present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that when the processor executes the computer program, the steps of the method for determining the sealing position in the temporary plugging particle seam as described in any one of the above claims are implemented.

[0031] On the other hand, the present invention provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the method for determining the blocking position in a temporary blocking particle seam as described in any one of the above claims are implemented.

[0032] The beneficial effects of the present invention are as follows: the present invention adopts the historical fracturing temporary plugging data of the target block to establish a temporary plugging particle fracture migration-plugging model, and according to the simulated temporary plugging particle fracture migration-plugging behavior and morphology, it is possible to scientifically and accurately determine the plugging position of the temporary plugging particle fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0034] Figure 1 It is a schematic diagram of the process of the present invention;

[0035] Figure 2 It is a schematic diagram of a large-scale single-wing crack space physical model in an embodiment of the present invention;

[0036] Figure 3 This is a curve showing the relationship between the temporary plugging particle size (3 mm) and the crack width ratio in the embodiment of the present invention;

[0037] Figure 4The simulation results of temporary plugging particle migration and plugging morphology in the crack under different plugging conditions (the ratio of temporary plugging particle size to crack width is 0.38, 0.43, 0.50, 0.60, and 0.75) and the same delivery + pressurization time (3 min) in the embodiment of the present invention;

[0038] Figure 5 It is a graph showing the initial time of migration and plugging behavior of temporary plugging particles in the fracture under different plugging conditions (ratios of temporary plugging particle size to fracture width are 0.38, 0.43, 0.50, 0.60, and 0.75) in the embodiment of the present invention;

[0039] Figure 6 It is a time curve diagram of the complete plugging behavior of temporary plugging particles in the fracture height direction under different plugging conditions (the ratio of temporary plugging particle size to fracture width is 0.38, 0.43, 0.50, 0.60, and 0.75) in the embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "include" or "comprise" and the like used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Figure 1 As shown, the present invention provides a method for determining the blocking position in a temporary blocking particle seam, comprising the following steps:.

[0043] S1. Count the temporary plugging construction parameters and temporary plugging effect evaluation results of the fractured wells in the target block;

[0044] Specifically, the temporary plugging construction parameters include the number of single fracturing layers in vertical wells / the number of single-stage fracturing clusters in horizontal wells, temporary plugging particle size, temporary plugging particle density, vertical well multi-layer / horizontal well single-stage delivery quality, delivery fluid volume, delivery displacement, delivery time, boosting displacement, boosting time, temporary plugging construction pressure under delivery + boosting time, fracturing fluid viscosity, etc.

[0045] The evaluation results of temporary plugging effect include the pressure increase effect after temporary plugging, the single-side size of the microseismic monitoring wave body after temporary plugging, the single-side size of the wide-area electromagnetic monitoring wave body after temporary plugging, and the pump stop pressure drop monitoring data.

[0046] If the delivery liquid volume, delivery time, boosting liquid volume and boosting time of temporary plugging particles are not recorded, the delivery liquid volume can be recorded as one wellbore volume of liquid; the delivery time can be recorded as the construction time before the temporary plugging particles are delivered, when the construction displacement drops to the minimum, and after one wellbore volume of liquid has passed; the boosting liquid volume (time) can be recorded as the construction liquid volume (time) when the construction pressure rises to the peak pressure for the first time after the temporary plugging particles are delivered, minus the construction liquid volume (time) before the temporary plugging particles are delivered, when the construction displacement drops to the minimum, and after one wellbore volume of liquid has passed.

[0047] S2. According to the temporary plugging construction parameters and the temporary plugging effect evaluation results, the input parameters required for simulating temporary plugging particle migration and plugging are converted;

[0048] Specifically, the conversion of temporary plugging construction parameters of fractured wells includes: converting the delivery mass of temporary plugging particles in vertical wells with multiple layers / horizontal wells with single sections into the delivery mass of temporary plugging particles in vertical wells with single layers / horizontal wells with single clusters and single wing fractures; converting the delivery liquid volume into the volume of liquid carried by the single wing fracture; converting the delivery displacement into the delivery flow at the entrance of the single wing fracture, and converting the boost displacement into the boost flow at the entrance of the single wing fracture; converting the temporary plugging construction pressure under the delivery + boost time into the net pressure in the single wing fracture.

[0049] Convert the temporary plugging effect evaluation results. If the fractured well has data on the single-side size of the microseismic monitoring wave body after temporary plugging (or the single-side size of the wide-area electromagnetic monitoring wave body after temporary plugging), the single-side size of the wave body will be converted into the single-wing crack length. If the fractured well has no crack monitoring data but has pump-off pressure drop monitoring data, the pump-off pressure drop monitoring data can also be inverted into the single-wing crack length.

[0050] The input parameters required for temporary plugging particle migration and plugging include temporary plugging particle parameters, temporary plugging construction parameters, and fracture parameters. Temporary plugging particle parameters include temporary plugging particle size, temporary plugging particle density, and single-wing fracture delivery mass concentration. Temporary plugging construction parameters include single-wing fracture entrance delivery flow, delivery time, boost flow, boost time, and fracturing fluid viscosity. Fracture parameters include single-wing fracture length, fracture width, and fracture height. Among them, the single-wing fracture delivery mass concentration is converted by the delivery mass and carrying fluid volume of a single-wing fracture in a single layer of a vertical well / a single cluster of a single wing of a horizontal well; the fracture width is converted by the net pressure in the single-wing fracture, the Young's modulus of the rock, and the Poisson's ratio; the fracture height is converted according to the reservoir thickness controlled by a single layer of a vertical well / a single section of a horizontal well.

[0051] S3. Establish a temporary plugging particle migration and plugging model, carry out simulation work, and obtain the temporary plugging particle migration and plugging behavior and morphology in a given fracture space;

[0052] A temporary plugging particle migration and sealing model is established, specifically: S31. Based on the single-wing crack length, crack width and crack height converted from the temporary plugging effect evaluation results, a large-scale single-wing crack space physical model is established; S32. Based on the Euler-Euler method, a temporary plugging particle migration and sealing mathematical model is established in the large-scale single-wing crack space.

[0053] Carry out a simulation of the migration and plugging of temporary plugging particles in the fractures, specifically: change the conditions for the temporary plugging particles to plug (the ratio of the temporary plugging particle size to the crack width), and simulate the migration and plugging process of temporary plugging particles in the fractures under the preset temporary plugging particle parameters, temporary plugging construction parameters and crack parameters.

[0054] The migration and plugging behavior of temporary plugging particles in a given fracture space are obtained, specifically: 1) the initial time of migration and plugging behavior of temporary plugging particles under different plugging conditions is obtained; 2) the time when the temporary plugging particles completely plug the fracture in the fracture height direction under different plugging conditions is obtained; 3) the migration and plugging morphology of temporary plugging particles under different plugging conditions and the same delivery + boosting time is obtained.

[0055] S4. Determine the plugging position in the temporary plugging particle seam according to the migration and plugging behavior and morphology of the temporary plugging particle seam;

[0056] When determining the blocking position in the temporary blocking particle seam, the details are as follows:

[0057] 1) If the initial time of temporary plugging particles' migration and plugging behavior in the fracture (or the time when temporary plugging particles completely plug in the fracture in the fracture height direction) is less than the delivery time, it means that the temporary plugging particles will not plug under this plugging condition, and it is not the position where temporary plugging particles plug in the fracture, and the position where temporary plugging particles actually plug under fracturing operation conditions is far away from the position where temporary plugging particles plug under the simulation conditions of migration and plugging in the fracture;

[0058] 2) If the initial time of temporary plugging particles migrating and plugging in the fracture is greater than or equal to the temporary plugging particle delivery time, and less than the temporary plugging particle delivery + pressure increase time, but the time of temporary plugging particles completely plugging in the fracture height direction is greater than or equal to the temporary plugging particle delivery + pressure increase time, it means that temporary plugging particles will plug under this plugging condition, but not at the position where temporary plugging particles plug in the fracture, and the position where temporary plugging particles actually plug under fracturing construction conditions is close to the position where temporary plugging particles plug under the simulation conditions of migration and plugging in the fracture;

[0059] 3) If the initial time of temporary blocking particles' migration and plugging behavior in the fracture is greater than or equal to the temporary blocking particle delivery time, and less than the temporary blocking particle delivery + pressure increase time, and the time of temporary blocking particles' complete plugging behavior in the fracture height direction in the fracture is less than the temporary blocking particle delivery + pressure increase time, it means that temporary blocking particles will block under the blocking conditions, and the location where temporary blocking particles block in the fracture may be;

[0060] 4) If the pressure increase effect after temporary plugging is small, and the pressure increase after temporary plugging is less than 3MPa, but under the plugging condition, the temporary plugging particles are simulated to completely plug the fracture height direction under the delivery + pressure increase time, it means that the temporary plugging particles will plug under the plugging condition, but the actual plugging position of the temporary plugging particles under the fracturing construction condition is far from the position where the temporary plugging particles migrate in the fracture and plugging simulation conditions occur;

[0061] 5) If the pressure increase effect after temporary plugging is large, and the pressure increase after temporary plugging is greater than or equal to 3MPa, but the temporary plugging particles simulated under this plugging condition do not completely plug in the fracture height direction under the delivery + pressure increase time, it means that the temporary plugging particles will plug under this plugging condition, but the actual plugging position of the temporary plugging particles under the fracturing construction condition is close to the position where the temporary plugging particles migrate in the fracture and plug under the plugging simulation condition;

[0062] 6) Excluding the temporary plugging particle migration-sealing results that meet 1)-2) and 4)-5), the temporary plugging particle migration-sealing behavior and morphology under different sealing conditions and the same delivery+pressurization time are compared. If the initial time of the temporary plugging particle migration-sealing behavior under the sealing condition is between the temporary plugging particle delivery time and the delivery+pressurization time, the time for the temporary plugging particle to completely seal the fracture in the fracture height direction is less than the temporary plugging particle delivery+pressurization time, and the temporary plugging particle migration-sealing morphology is relatively matched with the pressurization effect, it means that the actual sealing position of the temporary plugging particle under the fracturing construction condition is close to the sealing position of the temporary plugging particle migration-sealing under the simulation condition, and it can be judged as the position where the temporary plugging particle seals in the fracture.

[0063] In the present invention, based on the above-mentioned method for determining the blocking position in the temporary blocking particle seam, the present invention also provides a computer device, wherein the above-mentioned method is run on the computer device. The computer device may include one or more processors, such as one or more central processing units (CPUs) or graphics processing units (GPUs), and each processing unit may implement one or more hardware threads. The computer device may also include any memory for storing any kind of information such as code, settings, data, etc. In a specific embodiment, a computer program on the memory and executable on the processor, when the computer program is executed by the processor, can execute instructions according to the above-mentioned method.

[0064] Without limitation, for example, the memory may include any one or more combinations of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of a computer device. In one case, when the processor executes the associated instructions stored in any memory or combination of memories, the computer device may perform any operation of the associated instructions. The computer device also includes one or more drive mechanisms for interacting with any memory, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0065] Corresponding to the method for determining the plugging position in the temporary plugging particle seam in the present invention, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are executed.

[0066] Application Examples

[0067] Taking an actual well in the target block as an example, a specific method and process for determining the plugging position within the 3mm temporary plugging particle fracture under specific fracturing construction conditions is given.

[0068] S1. Statistical analysis of temporary plugging construction parameters and temporary plugging effect evaluation results of fractured wells in the target block, as shown in Table 1;

[0069] Table 1

[0070]

[0071]

[0072] S2. According to the temporary plugging construction parameters and the temporary plugging effect evaluation results, the input parameters required for simulating temporary plugging particle migration and plugging are calculated, as shown in Table 2;

[0073]

[0074]

[0075] S3. Establish a temporary plugging particle migration and plugging model, carry out simulation work, and obtain the temporary plugging particle migration and plugging behavior and morphology in a given fracture space;

[0076] A temporary plugging particle migration and plugging model is established, specifically: 1) Based on the single-wing crack length, crack width and crack height converted from the temporary plugging effect evaluation results, a large-scale single-wing crack space physical model is established, such as Figure 2 As shown; 2) Based on the Euler-Euler method, a mathematical model of temporary plugging particle migration and plugging in large-scale single-wing crack space is established.

[0077] Carry out the simulation of temporary plugging particle migration and plugging in the crack, specifically: change the conditions for temporary plugging particles to plug (the ratio of temporary plugging particle size to crack width, such as Figure 3 As shown in Figure 2), the migration and plugging process of temporary plugging particles in the fracture is simulated under given temporary plugging particle parameters, temporary plugging construction parameters and crack parameters (when the ratio of temporary plugging particle size to crack width is 0.38, 0.43, 0.50, 0.60, 0.75, as shown in Figure 2). Figure 4 shown).

[0078] Obtain the migration and plugging behavior of temporary plugging particles in a given fracture space, specifically: 1) Obtain the initial time of the migration and plugging behavior of temporary plugging particles under different plugging conditions, such as Figure 5 2) Obtain the time for the temporary plugging particles to completely plug the fracture in the fracture height direction under different plugging conditions, such as Figure 6 3) Obtain the migration and plugging morphology of temporary plugged particles under different plugging conditions and the same delivery + pressure increase time (3 min), as shown in Figure 4 shown.

[0079] S4. Determine the plugging position in the temporary plugging particle seam according to the migration and plugging behavior and morphology of the temporary plugging particle seam;

[0080] 1) If the initial time of temporary plugging particles migrating and plugging in the fracture (or the time when temporary plugging particles completely plug in the fracture in the fracture height direction) is less than the temporary plugging particle delivery time, it means that the temporary plugging particles will not plug under this plugging condition, and it is not the position where temporary plugging particles plug in the fracture, and the position where temporary plugging particles actually plug under fracturing operation conditions is far away from the position where temporary plugging particles plug under the simulation conditions of migration and plugging in the fracture;

[0081] In the application example, when the ratio of temporary plugging particle size to crack width is 0.38, the time (1.7 min) for the temporary plugging particles to completely plug the crack in the crack height direction is less than the temporary plugging particle delivery time (2 min), which means that under this plugging condition (ratio 0.38), the temporary plugging particles will not plug the crack, and the single-wing crack length of 27.8 m is not the location where temporary plugging particles plug the crack, and the actual location where temporary plugging particles plug the crack under fracturing construction conditions is far from the single-wing crack length of 27.8 m.

[0082] 2) If the initial time of temporary plugging particles migrating and plugging in the fracture is greater than or equal to the temporary plugging particle delivery time, and less than the temporary plugging particle delivery + pressure increase time, but the time of temporary plugging particles completely plugging in the fracture height direction is greater than or equal to the temporary plugging particle delivery + pressure increase time, it means that temporary plugging particles will plug under this plugging condition, but not at the position where temporary plugging particles plug in the fracture, and the position where temporary plugging particles actually plug under fracturing construction conditions is close to the position where temporary plugging particles plug under the simulation conditions of migration and plugging in the fracture;

[0083] In the application example, when the ratio of temporary plugging particle size to crack width is 0.75, the initial time (2.9 min) of temporary plugging particle migration and plugging behavior in the crack is greater than the temporary plugging particle delivery time (2 min) and less than the temporary plugging particle delivery + pressurization time (3 min), but the time (3.2 min) of temporary plugging particle complete plugging behavior in the crack height direction is greater than the temporary plugging particle delivery + pressurization time (3 min), which means that under this plugging condition (ratio 0.75), temporary plugging particles will plug, but the single-wing crack length of 85.3 m is not the position where temporary plugging particles plug in the crack, and the position where temporary plugging particles actually plug under fracturing construction conditions is close to the single-wing crack length of 85.3 m.

[0084] 3) If the initial time of temporary blocking particles' migration and plugging behavior in the fracture is greater than or equal to the temporary blocking particle delivery time, and less than the temporary blocking particle delivery + pressure increase time, and the time of temporary blocking particles' complete plugging behavior in the fracture height direction in the fracture is less than the temporary blocking particle delivery + pressure increase time, it means that temporary blocking particles will block under the blocking conditions, and the location where temporary blocking particles block in the fracture may be;

[0085] In the application example, when the ratio of temporary plugging particle size to crack width is 0.43, 0.50, and 0.60, the initial time of temporary plugging particle migration and plugging behavior in the crack (2.0min, 2.3min, 2.6min) is greater than or equal to the temporary plugging particle delivery time (2min), and less than the temporary plugging particle delivery + pressurization time (3min), and the time for the temporary plugging particle to completely plug the crack in the crack height direction (2.3min, 2.6min, 2.9min) is less than the temporary plugging particle delivery + pressurization time (3min), which means that under the plugging conditions (ratio 0.43, 0.50, 0.60), temporary plugging particles will plug, which may be the location where temporary plugging particles plug in the crack.

[0086] 4) If the pressure increase effect after temporary plugging is small, and the pressure increase after temporary plugging is less than 3MPa, but under the plugging condition, the temporary plugging particles are simulated to completely plug the fracture height direction under the delivery + pressure increase time, it means that the temporary plugging particles will plug under the plugging condition, but the actual plugging position of the temporary plugging particles under the fracturing construction condition is far from the position where the temporary plugging particles migrate in the fracture and plugging simulation conditions occur;

[0087] In the application example, the pressure increase effect after temporary plugging is large (5MPa), which does not meet the condition 4).

[0088] 5) If the pressure increase effect after temporary plugging is large, and the pressure increase after temporary plugging is greater than 3MPa, but the temporary plugging particles simulated under this plugging condition do not completely plug in the fracture height direction under the delivery + pressure increase time, it means that the temporary plugging particles will plug under this plugging condition, but the actual plugging position of the temporary plugging particles under the fracturing construction condition is close to the position where the temporary plugging particles migrate in the fracture and plug under the plugging simulation condition;

[0089] In the application example, the pressure increase effect after temporary plugging is large (5MPa), and the pressure increase after temporary plugging is high. However, when the ratio of temporary plugging particle size to crack width is 0.60, the simulation shows that the temporary plugging particles do not completely block the crack height direction under the delivery + pressure increase time, such as Figure 3 As shown, it means that temporary plugging particles will plug under this plugging condition, but the actual plugging position of temporary plugging particles under fracturing construction conditions is close to the length of the single wing crack of 71m.

[0090] 6) Excluding the temporary plugging particle migration-sealing results that meet 1)-2) and 4)-5), the temporary plugging particle migration-sealing behavior and morphology under different sealing conditions and the same delivery+pressurization time are compared. If the initial time of the temporary plugging particle migration-sealing behavior under the sealing condition is between the temporary plugging particle delivery time and the delivery+pressurization time, the time for the temporary plugging particle to completely seal the fracture in the fracture height direction is less than the temporary plugging particle delivery+pressurization time, and the temporary plugging particle migration-sealing morphology is relatively matched with the pressurization effect, it means that the actual sealing position of the temporary plugging particle under the fracturing construction condition is close to the sealing position of the temporary plugging particle migration-sealing under the simulation condition, and it can be judged as the position where the temporary plugging particle seals in the fracture.

[0091] In the application example, the migration and plugging results of temporary plugging particles in the cracks when the ratio of temporary plugging particle size to crack width is 0.38, 0.60, and 0.75 are excluded, and the migration and plugging behaviors and morphologies of temporary plugging particles in the cracks under different plugging conditions (the ratio of temporary plugging particle size to crack width is 0.43 and 0.50) and the same delivery + pressurization time (3 minutes) are compared. Figure 3 As shown in the figure; when the ratio of temporary plugging particle size to crack width is 0.43 and 0.50, the initial time of temporary plugging particle migration and plugging behavior in the crack (2.3min, 2.6min) is between the temporary plugging particle delivery time (2min) and delivery + pressurization time (3min), and the time for temporary plugging particles to completely plug the crack in the crack height direction (2.6min, 2.9min) is less than the temporary plugging particle delivery + pressurization time (3min). When the ratio of temporary plugging particle size to crack width is 0.43, compared with the ratio of 0.50, the migration and plugging morphology of temporary plugging particles in the crack is more matched with the pressurization effect, indicating that the location of temporary plugging particle plugging in the crack is near the length of the single-wing crack of 42.3m.

[0092] It can be seen that the present invention provides a method for judging the sealing position within a temporary plugging particle fracture. The construction parameters of the fractured well and the temporary plugging effect evaluation results are used to establish a corresponding temporary plugging particle fracture migration-plugging model. According to the temporary plugging particle fracture migration-plugging behavior and morphology obtained by the model simulation, the sealing position within the temporary plugging particle fracture can be judged.

[0093] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A method for determining a temporary plugging position in a particle gap, comprising the following steps: S1. Count the temporary plugging construction parameters and temporary plugging effect evaluation results of the fractured wells in the target block; S2. According to the temporary plugging construction parameters and the temporary plugging effect evaluation results, the input parameters required for simulating temporary plugging particle migration and plugging are converted; S3. Establish a temporary plugging particle migration and plugging model, carry out simulation work, and obtain the temporary plugging particle migration and plugging behavior and morphology in a given fracture space; S4. Determine the sealing position in the temporary plugging particle seam based on the migration and sealing behavior and morphology of the temporary plugging particle seam.

2. According to the method for determining the sealing position of temporary plugging particles in a seam, the construction parameters in step S1 include the number of single fracturing layers in a vertical well / the number of single-stage fracturing clusters in a horizontal well, the particle size of temporary plugging particles, the density of temporary plugging particles, the delivery quality of multiple layers in a vertical well / single-stage in a horizontal well, the delivery fluid volume, the delivery displacement, the delivery time, the boosting displacement, the boosting time, the temporary plugging construction pressure under the delivery + boosting time, and the viscosity of the fracturing fluid.

3. According to the method for determining the plugging position in a temporary plugging granular fracture according to claim 1, the temporary plugging effect evaluation result in step S1 includes the pressure boosting effect after temporary plugging, the single-side size of the microseismic monitoring wave body after temporary plugging, the single-side size of the wide-area electromagnetic monitoring wave body after temporary plugging, and the pump stop pressure drop monitoring data.

4. According to the method for determining the sealing position in a temporary plugging particle crack according to claim 1, the input parameters in step S2 include temporary plugging particle parameters, temporary plugging construction parameters, and crack parameters.

5. According to the method for determining the plugging position in a temporary plugging particle crack according to claim 1, the step S3 of establishing a migration-plugging model in a temporary plugging particle crack comprises: S31, based on the crack parameters in the input parameters, establishing a single-wing crack space physical model of corresponding size; S32. Constructing a corresponding temporary plugging particle migration-plugging mathematical model based on the single-wing fracture space physical model.

6. According to the method for determining the blocking position in the temporary blocking particle seam according to claim 1, the simulation work in step S3 comprises: The ratio of temporary plugging particle size to crack width was changed to simulate the migration and plugging process of temporary plugging particles under preset temporary plugging particle parameters, temporary plugging construction parameters and crack parameters.

7. According to the method for determining the plugging position of temporary plugging particles in a fracture according to claim 1, the step S3 of obtaining the migration and plugging behavior and morphology of temporary plugging particles in a given fracture space comprises: Obtain the initial time of intra-fracture migration and plugging behavior of temporary plugging particles under different plugging conditions; Obtain the time it takes for temporary plugging particles to completely plug the fracture in the fracture height direction under different plugging conditions; Obtain the migration and plugging morphology of temporary plugged particles in the cracks under different plugging conditions and the same delivery + pressurization time.

8. According to the method for determining the temporary blocking position in the particle gap according to claim 1, determining the temporary blocking position in the particle gap in step S4 comprises: 1) If the initial time of temporary plugging particles' migration and plugging behavior in the fracture or the time of temporary plugging particles' complete plugging behavior in the fracture height direction in the fracture is less than the delivery time, then the temporary plugging particles will not plug under this plugging condition, and the position where temporary plugging particles plug in the fracture is not the position where temporary plugging particles plug in the fracture, and the position where temporary plugging particles actually plug under fracturing construction conditions is far from the position where temporary plugging particles plug under the simulation conditions of migration and plugging in the fracture; 2) If the initial time of temporary plugging particles migrating and plugging in the fracture is greater than or equal to the temporary plugging particle delivery time, and less than the temporary plugging particle delivery + pressure increase time, but the time of temporary plugging particles completely plugging in the fracture height direction is greater than or equal to the temporary plugging particle delivery + pressure increase time, then the temporary plugging particles will plug under this plugging condition, but not at the position where the temporary plugging particles plug in the fracture, and the position where the temporary plugging particles actually plug under the fracturing operation condition is close to the position where the temporary plugging particles plug under the simulation condition of migration and plugging in the fracture; 3) If the initial time of temporary blocking particles' migration and plugging behavior in the fracture is greater than or equal to the temporary blocking particle delivery time, and less than the temporary blocking particle delivery + pressure increase time, and the time of temporary blocking particles' complete plugging behavior in the fracture height direction in the fracture is less than the temporary blocking particle delivery + pressure increase time, then the temporary blocking particles will plug under this plugging condition, and the location where the temporary blocking particles plug in the fracture may be; 4) If the pressure increase effect after temporary plugging is small, and the pressure increase after temporary plugging is less than 3MPa, the temporary plugging particles are simulated to completely block the fracture height direction under the plugging condition under the delivery + pressure increase time, then the temporary plugging particles will block under this blocking condition, but the actual blocking position of the temporary plugging particles under the fracturing construction condition is far from the blocking position under the temporary plugging particle migration-blocking simulation condition; 5) If the pressure increase effect after temporary plugging is large, and the pressure increase after temporary plugging is greater than or equal to 3MPa, the temporary plugging particles simulated under this plugging condition do not completely plug in the fracture height direction under the delivery + pressure increase time, which means that the temporary plugging particles will plug under this plugging condition, but the actual plugging position of the temporary plugging particles under the fracturing construction condition is close to the position where the temporary plugging particles migrate in the fracture and plug under the plugging simulation condition; 6) Excluding the temporary plugging particle migration-sealing results that meet 1) to 2) and 4) to 5), the migration-sealing behavior and morphology of temporary plugging particles in fractures under different sealing conditions and the same delivery + pressurization time are compared. If the initial time of the temporary plugging particle migration-sealing behavior under the sealing condition is between the temporary plugging particle delivery time and the delivery + pressurization time, the time for the temporary plugging particles to completely seal in the fracture height direction is less than the temporary plugging particle delivery + pressurization time, and the migration-sealing morphology of temporary plugging particles in fractures is relatively matched with the pressurization effect, it means that the actual sealing position of the temporary plugging particles under the fracturing construction conditions is close to the sealing position of the temporary plugging particles under the simulation conditions of migration-sealing in fractures, and it is judged to be the position where the temporary plugging particles are sealed in the fracture.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining the blocking position in the temporary blocking particle gap described in any one of claims 1 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the blocking position in a temporary blocking particle gap described in any one of claims 1 to 8 are implemented.

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