CN115977615A - Fracturing effect evaluation method, system, medium and electronic device - Google Patents
Fracturing effect evaluation method, system, medium and electronic device Download PDFInfo
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Abstract
The invention provides a fracturing effect evaluation method, a fracturing effect evaluation system, a fracturing effect evaluation medium and electronic equipment. The evaluation method comprises the following steps: acquiring a fracturing image after fracturing inside a well and related parameters of a fracturing fracture; analyzing the effectiveness of the crack image to obtain an effective crack image; calculating the effectiveness of the effective crack images to respectively obtain the effectiveness parameters of each effective crack; determining an energy proportion parameter of the effective crack according to an energy intensity difference value before and after the effective crack is fractured; determining an effective productivity ratio parameter of each effective crack according to the related parameters of the fracturing cracks; and calculating the evaluation parameter of each effective crack according to the effectiveness parameter, the energy ratio parameter and the effective productivity ratio parameter, and sequencing each effective crack according to the evaluation parameters to obtain the effective crack with the best fracturing effect. The method further evaluates and sequences the fracturing cracks meeting the requirements, and improves the accuracy of fracturing effect evaluation.
Description
Technical Field
The invention belongs to the technical field of drilling exploration, and particularly relates to a fracturing effect evaluation method, a fracturing effect evaluation system, a fracturing effect evaluation medium and electronic equipment.
Background
As oil field development progresses, difficulty in developing oil and gas reservoirs gradually increases, and in order to more fully exploit oil and gas wells, a reservoir, which is usually referred to as an oil layer or a gas layer), is subjected to fracturing treatment. At present, fracturing becomes a key technology for effectively developing unconventional resources such as compact sandstone oil gas, shale oil gas and the like. With the development of knowledge on formation exploration and development, more and more oil and gas reservoirs need fracturing development.
In the field of petroleum, fracturing refers to a method of forming cracks in oil and gas layers by using the action of water power in the process of oil or gas production, and is also called hydraulic fracturing. Fracturing is the process of artificially cracking stratum, improving the flowing environment of oil in underground and increasing the yield of oil well, and plays an important role in improving the flowing condition of oil well bottom, slowing down the interlamination and improving the oil layer utilization condition. Therefore, the method for evaluating the fracturing effect of the reservoir has a very important role in determining the productivity of the reservoir.
However, the fracturing effect is often evaluated only integrally at present, and different information of a fracturing gap is not integrated, so that the final evaluation result lacks accuracy.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method, a system, a medium and an electronic device for evaluating a fracturing effect, which are used to solve the problem of inaccurate evaluation of the fracturing effect of a fracture in the prior art.
To achieve the above and other related objects, the present invention provides a fracturing effect evaluation method, including:
acquiring a fracturing image after fracturing inside a drilling well is finished and related parameters of the fracturing fracture;
performing image recognition on the fracturing image to obtain a plurality of fracture images, and performing effectiveness analysis on the fracture images to obtain effective fracture images, wherein each effective fracture image corresponds to one effective fracture;
calculating the effectiveness of the effective crack images to respectively obtain the effectiveness parameters of each effective crack;
acquiring energy intensity before and after the effective fracture is fractured, and determining an energy proportion parameter of the effective fracture according to an energy intensity difference before and after the effective fracture is fractured;
determining an effective productivity ratio parameter of each effective fracture according to the related parameters of the fracturing fractures;
and calculating an evaluation parameter of each effective crack according to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter, and sequencing each effective crack according to the evaluation parameters to obtain the effective crack with the best fracturing effect.
Optionally, the performing effectiveness analysis on the fracture image to obtain an effective fracture image includes:
acquiring a normal image before fracture image fracturing, and extracting an edge image of the fracture image according to the difference between the normal image and the fracture image;
acquiring edge pressure information and fracture pressure information of corresponding positions of the edge image and the fracture image in a well in a rock stratum fracturing simulation mode;
calculating a pressure difference between the fracture pressure information and the edge pressure information;
and taking the corresponding fracture image as the effective fracture image when the pressure difference value is larger than a first pressure threshold value.
Optionally, the obtaining of the edge pressure information and the fracture pressure information of the corresponding positions of the edge image and the fracture image in the drilling well by means of rock stratum fracture simulation includes:
determining a first region within the borehole from the fracture image and dividing the first region into a plurality of first partitions;
performing stimulation simulation on the first area to obtain the instantaneous pressure value of each first subarea, and taking the maximum instantaneous pressure value as the fracture pressure information of the fracture image;
determining a second region within the borehole from the edge image, dividing the second region into a plurality of second partitions;
performing fracture simulation on the second area to obtain a fractured pressure critical value of each second subarea;
taking the minimum pressure critical value as the edge pressure information of the edge image;
wherein each of the first regions is in critical contact with at least one of the second regions after the first and second regions are divided.
Optionally, the calculating the effectiveness of the effective crack image to obtain an effectiveness parameter of each effective crack includes:
determining whether each of the first partitions is effective by vibration simulation, wherein the effective first partitions are used as effective areas of the effective cracks;
determining an effective area ratio of the effective cracks according to an area ratio between the effective area and the effective cracks;
obtaining related fractures around the effective fracture image, and calculating the contribution rate of the related fractures to the yield increase of the fracture;
calculating the effectiveness parameter of the effective fracture from the effective area ratio and the contribution ratio.
Optionally, the obtaining the energy intensity before and after the effective fracture is fractured and determining the energy proportion parameter of the effective fracture according to the energy intensity difference before and after the effective fracture is fractured includes:
acquiring a first energy mean value born by each region of the effective fracture before fracturing and a second energy mean value when each region of the effective fracture is fractured;
calculating the energy difference value according to the first energy mean value and the second energy mean value;
and calculating the energy proportion parameter of the effective crack according to the area of the effective region and the energy difference value.
Optionally, the determining the effective productivity ratio parameter of each effective fracture according to the related parameters of the fracture includes:
obtaining the effective period and daily average yield increase of the fracturing fracture;
calculating the capacity ratio of the fracturing fracture according to the effective period and the daily average yield increase;
and determining an effective productivity ratio parameter of the effective fracture according to the proportional relation between the effective fracture and the fractured fracture.
Optionally, the calculating an evaluation parameter of each effective fracture according to the effectiveness parameter, the energy ratio parameter, and the effective productivity ratio parameter, and sequencing each effective fracture according to the evaluation parameter to obtain the effective fracture with the best fracturing effect includes:
respectively endowing a first weight, a second weight and a third weight to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter according to a neural network model;
calculating an evaluation parameter of the effective fracture according to the first weight, the second weight and the third weight and the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter;
ranking the evaluation parameters of each of the effective fractures;
and selecting the effective fracture with the maximum evaluation parameter as an optimal fracture.
The invention also provides a fracturing effect evaluation system, which comprises:
the parameter acquisition module is used for acquiring a fracturing image after the fracturing inside the drilling well is finished and related parameters of the fracturing fracture;
the analysis module is used for carrying out image recognition on the fracturing image to obtain a plurality of fracture images, and carrying out effectiveness analysis on the fracture images to obtain effective fracture images, wherein each effective fracture image corresponds to one effective fracture;
the effectiveness calculation module is used for calculating the effectiveness of the effective crack images to respectively obtain the effectiveness parameters of each effective crack;
the energy calculation module is used for acquiring the energy intensity before and after the effective fracture is fractured and determining the energy proportion parameter of the effective fracture according to the energy intensity difference before and after the effective fracture is fractured;
the productivity calculation module is used for determining an effective productivity ratio parameter of each effective crack according to the related parameters of the fracturing cracks;
and the comprehensive evaluation module is used for calculating an evaluation parameter of each effective crack according to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter, and sequencing each effective crack according to the evaluation parameters to obtain the effective crack with the best fracturing effect.
The present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described fracturing effect evaluation method.
The present invention provides a terminal, including: a processor and a memory; the memory is used for storing a computer program; the processor is used for executing the computer program stored in the memory so as to enable the terminal to execute the fracturing effect evaluation method.
As described above, the fracturing effect evaluation method, system, medium, and electronic device according to the present invention have the following advantageous effects:
in the process of evaluating the fracturing cracks, the effectiveness parameters, the energy proportion parameters and the effective productivity parameters of the effective cracks in the fracturing cracks are respectively obtained, so that the fracturing cracks are comprehensively evaluated in three aspects of effectiveness, energy and productivity, the fracturing effect evaluation result is more accurate, various factors are comprehensively considered, the problem of single evaluation is avoided, reference can be provided for the fracturing conditions in the drilling wells of the same type, the fracturing cracks meeting the requirements are further evaluated and sequenced, the evaluation process of the fracturing effect is further refined, and a basis is provided for the follow-up fracturing effect evaluation.
Drawings
Fig. 1 is a flowchart showing the fracturing effect evaluation method of the present invention.
Fig. 2 is a flowchart illustrating step S102 in the fracture effectiveness evaluation method according to the present invention.
Fig. 3 is a flowchart of step S103 in the fracturing effect evaluation method of the present invention.
Fig. 4 is a flowchart showing the step S106 of the fracturing effect evaluation method of the present invention.
Fig. 5 is a block diagram showing the structure of the fracture effectiveness evaluation system of the present invention.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
As shown in fig. 1, in an embodiment, a method for evaluating a fracturing effect of the present invention includes the following steps:
s101, obtaining a fracturing image after fracturing inside a drilling well is finished and relevant parameters of the fracturing fracture.
In this embodiment, after obtaining the fracturing fracture through the fracturing mode to inside in the well drilling, through obtaining the fracturing image of fracturing fracture and the relevant parameter of fracturing fracture, be convenient for follow-up aassessment to the fracturing effect. Relevant parameters for fracturing the fracture include, among others, shelf life and daily gain.
S102, carrying out image recognition on the fracturing image to obtain a plurality of fracture images, and carrying out effectiveness analysis on the fracture images to obtain effective fracture images, wherein each effective fracture image corresponds to one effective fracture.
In some embodiments, the analyzing the effectiveness of the fracture image to obtain an effective fracture image, with reference to fig. 2, includes:
s201, acquiring a normal image before fracture image fracturing, and extracting an edge image of the fracture image according to the difference between the normal image and the fracture image;
s202, obtaining edge pressure information and fracture pressure information of corresponding positions of the edge image and the fracture image in a well in a rock stratum fracturing simulation mode;
s203, calculating a pressure difference value between the crack pressure information and the edge pressure information;
s204, taking the corresponding fracture image as the effective fracture image when the pressure difference value is larger than a first pressure threshold value.
In this embodiment, after fracturing is completed inside a drilling well, after a fractured image after fracturing is obtained through a camera in a drill bit, after a plurality of fracture images are obtained in an image recognition mode, in order to divide the fracture image, an edge image which is not fractured in the normal image can be obtained by comparing the fracture image with a normal image before fracturing, then, rock stratum fracturing simulation is performed on the positions of the fracture image and the edge image to determine edge pressure information of the edge image and fracture pressure information of the fracture image, then, a pressure difference value between the edge pressure information and the fracture pressure information is calculated, and the corresponding fracture image is selected as an effective fracture image when the pressure difference value is greater than a first pressure threshold value, so that the effective fracture image with higher pressure bearing capacity is quickly screened out, that is, an effective fracture is screened out.
In some embodiments, the obtaining of the edge pressure information and the fracture pressure information of the corresponding positions of the edge image and the fracture image in the well bore by means of the formation fracture simulation includes:
determining a first region within the borehole from the fracture image and dividing the first region into a plurality of first partitions;
performing stimulation simulation on the first area to obtain the instantaneous pressure value of each first subarea, and taking the maximum instantaneous pressure value as the fracture pressure information of the fracture image;
determining a second region within the borehole from the edge image, dividing the second region into a plurality of second partitions;
performing fracture simulation on the second area to obtain a fractured pressure critical value of each second subarea;
taking the minimum pressure critical value as the edge pressure information of the edge image;
wherein each of the first regions is in critical contact with at least one of the second regions after the first and second regions are divided.
In this embodiment, after obtaining a fracture image and an edge image around the fracture image, respectively, in order to obtain edge pressure information and fracture pressure information, a first region of the first region inside a well bore is determined according to the fracture image, the first region is divided into a plurality of first partitions according to distribution characteristics of the first region, for example, the first region is in a strip-shaped distribution, the first region is divided at equal intervals according to length, then stimulation simulation is performed on the first region so as to obtain an instantaneous pressure curve of the first region at the time of production, an instantaneous pressure value of each first partition is also obtained, and the maximum instantaneous pressure value is used as the fracture pressure information of the fracture image. And for the second area corresponding to the edge image, dividing the second area into a plurality of second partitions according to the same dividing mode, and performing fracturing simulation on the position of the second area, so as to obtain a pressure critical value which can be borne by the second area during fracturing, and taking the minimum pressure critical value as edge pressure information of the position of the edge image, so as to facilitate subsequent pressure comparison.
It should be noted that, when the first area and the second area are partitioned, each of the first partitions is in critical contact with at least one of the second partitions, so that the first partitions and the second partitions are associated with each other, the edge pressure information and the crack pressure information obtained after simulation are more accurate, and the influence between the area corresponding to the edge image and the area corresponding to the crack image in an isolated simulation process is avoided without considering the influence between the area corresponding to the edge image and the area corresponding to the crack image.
S103, calculating the effectiveness of the effective crack images to respectively obtain the effectiveness parameters of each effective crack.
In some embodiments, referring to fig. 3, the performing an effectiveness calculation on the effective fracture images to obtain an effectiveness parameter of each effective fracture respectively includes:
s301, determining whether each first partition is effective or not through vibration simulation, and taking the effective first partition as an effective area of the effective crack;
s302, determining the effective area ratio of the effective cracks according to the area ratio of the effective area to the effective cracks;
s303, obtaining the associated cracks around the effective crack image, and calculating the contribution rate of the associated cracks to the yield increase of the fracture cracks;
s304, calculating the effectiveness parameters of the effective cracks according to the effective area ratio and the contribution rate.
In the embodiment, in order to perform validity calculation on the obtained effective fracture image, each first partition is tested by means of vibration simulation to determine whether the first partition is effective or not so as to obtain an effective area in the effective fracture. Specifically, a vibration signal is diffused to each first partition in a vibration simulating manner so as to determine the condition that the quality factor of each first partition changes, and the first partition is judged to be effective when the speed of the quality factor change is lower than a threshold value, so that the effective first partition can be used as an effective area of an effective crack, and then the area of the effective area and the area of the effective crack are calculated in a scanning manner to obtain the area ratio of the effective area and the effective crack, so that the effective area ratio of the effective crack can be obtained; similarly, some associated fractures can be generated while effective fractures are obtained in the fracturing process, the associated fractures are obtained through the effective fracture images, then the contribution rate of the associated fractures to the whole yield increase can be obtained according to the ratio of the yield increase amount flowing out of the associated fractures to the whole yield increase amount in the yield increase process, and then the value of the effective parameter of each effective fracture can be calculated through a normalization mode, so that the subsequent calculation is facilitated.
S104, obtaining the energy intensity before and after the effective fracture is fractured, and determining the energy proportion parameter of the effective fracture according to the energy intensity difference before and after the effective fracture is fractured.
In some embodiments, the obtaining the energy intensities before and after the effective fracture is fractured and determining the energy proportion parameter of the effective fracture according to the energy intensity difference before and after the effective fracture is fractured includes:
acquiring a first energy mean value born by each zone of the effective fracture before fracturing and a second energy mean value when each zone of the effective fracture is fractured;
calculating the energy difference value according to the first energy mean value and the second energy mean value;
and calculating the energy proportion parameter of the effective crack according to the area of the effective region and the energy difference value.
In this embodiment, a first energy average value borne by each zone in the effective fractures before fracturing and a second energy average value when each zone of the effective fractures is fractured are calculated, where the first energy average value and the second energy average value are energy values in a unit area, energy required to be increased when the effective fractures are fractured can be obtained by calculating an energy difference between the first energy average value and the second energy average value, then a total energy value of the entire effective fractures can be calculated according to a product of the area of the effective zone and the energy difference value, so as to determine energy required to be additionally increased when the effective fractures are formed, and then an energy proportion parameter of each effective fracture can be calculated in a normalization manner.
And S105, determining an effective productivity ratio parameter of each effective fracture according to the related parameters of the fractured fractures.
In some embodiments, the determining the effective energy-to-production ratio parameter of each effective fracture according to the related parameters of the fractured fractures comprises:
obtaining the effective period and daily average yield increase of the fracture;
calculating the capacity ratio of the fracturing fracture according to the effective period and the daily average yield increase;
and determining an effective productivity ratio parameter of the effective fracture according to the proportional relation between the effective fracture and the fractured fracture.
Specifically, after the capacity ratio a of the fracturing fractures is determined according to the product of the effective period and the daily average yield increase, the effective capacity a of the effective fractures can be obtained according to the area ratio B between the effective fractures and the fracturing fractures, and in order to combine and compare each effective fracture, the ratio of the effective capacity of each effective fracture to the sum of the total effective capacity is respectively counted in a normalization mode, so that the effective capacity ratio parameter of each effective fracture can be obtained.
S106, calculating an evaluation parameter of each effective crack according to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter, and sequencing each effective crack according to the evaluation parameters to obtain the effective crack with the best fracturing effect.
In some embodiments, referring to fig. 4, the calculating an evaluation parameter of each effective fracture according to the effectiveness parameter, the energy ratio parameter and the effective productivity ratio parameter, and ranking each effective fracture according to the evaluation parameter to obtain the effective fracture with the best fracturing effect includes:
s401, respectively giving a first weight, a second weight and a third weight to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter according to a neural network model;
s402, calculating an evaluation parameter of the effective fracture according to the first weight, the second weight and the third weight, the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter;
s403, sorting the evaluation parameters of each effective crack;
s404, selecting the effective fracture with the maximum evaluation parameter as an optimal fracture.
In this embodiment, in order to compare the fracturing effects of different effective fractures, different weights are given to the effectiveness parameters, the energy ratio parameters and the effective productivity ratio parameters of the effective fractures in a manner of training a neural network model, so as to calculate the evaluation parameters of each effective fracture according to the given weights, and finally, evaluation analysis is performed on each effective fracture according to the evaluation parameters.
The neural network model is obtained by training the simulation data of the fracturing fracture in the past period so as to obtain the influence ratio of the effectiveness parameter, the energy ratio parameter and the effective productivity ratio parameter on the whole fracturing effect. The first weight, the second weight and the third weight corresponding to the effectiveness parameter, the energy proportion parameter and the effective productivity proportion parameter may also be configured manually according to experience, and this is not particularly limited in this embodiment.
After the evaluation parameters of each effective crack are respectively obtained according to the effectiveness parameters, the energy proportion parameters, the effective productivity ratio parameters, the first weight, the second weight and the third weight, the sizes of the evaluation parameters are compared and sequenced, so that the optimal fracturing crack can be selected from a group of fracturing cracks meeting the requirements, rather than simply judging whether the fracturing crack meets the requirements or not, and providing a reference basis for the subsequent fracturing process.
The present invention also provides a fracturing effect evaluation system, referring to fig. 5, including:
the parameter obtaining module 501 is configured to obtain a fracturing image after fracturing inside a drilling well is finished and related parameters of the fracturing fracture;
an analysis module 502, configured to perform image recognition on the fracture image to obtain a plurality of fracture images, and perform validity analysis on the fracture image to obtain effective fracture images, where each effective fracture image corresponds to one effective fracture;
an effectiveness calculation module 503, configured to perform effectiveness calculation on the effective crack images to obtain an effectiveness parameter of each effective crack;
an energy calculation module 504, configured to obtain energy intensities before and after fracturing of the effective fracture, and determine an energy proportion parameter of the effective fracture according to an energy intensity difference before and after fracturing of the effective fracture;
a productivity calculation module 505, configured to determine an effective productivity ratio parameter of each effective fracture according to the related parameters of the fracturing fracture;
and the comprehensive evaluation module 506 is configured to calculate an evaluation parameter of each effective fracture according to the effectiveness parameter, the energy ratio parameter and the effective productivity ratio parameter, and sort each effective fracture according to the evaluation parameter to obtain the effective fracture with the best fracturing effect.
Since the principle of each module of the fracturing effect evaluation system corresponds to the steps of the fracturing effect evaluation method one by one, the description is omitted here.
It should be noted that the protection scope of the method for evaluating the fracturing effect according to the present invention is not limited to the execution sequence of the steps listed in the embodiment, and all the solutions of the prior art, including the addition, the subtraction and the replacement of the steps according to the principle of the present invention, are included in the protection scope of the present invention.
It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the x module may be a processing element separately set up, or may be integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a processing element of the apparatus calls and executes the function of the x module. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can invoke the program code. As another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
The storage medium of the present invention stores thereon a computer program that, when executed by a processor, implements the fracturing effect evaluation method described above. The storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
The electronic equipment comprises a processor and a memory.
The memory is for storing a computer program. Preferably, the memory comprises: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
The processor is connected with the memory and used for executing the computer program stored in the memory so as to enable the terminal to execute the fracturing effect evaluation method.
Preferably, the Processor may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
It should be noted that the fracture effectiveness evaluation system of the present invention can implement the fracture effectiveness evaluation method of the present invention, but the implementation device of the fracture effectiveness evaluation method of the present invention includes, but is not limited to, the structure of the fracture effectiveness evaluation system described in the present embodiment, and all structural modifications and substitutions of the prior art made according to the principle of the present invention are included in the protection scope of the present invention.
In conclusion, in the fracturing effect evaluation method, the fracturing effect evaluation system, the medium and the electronic equipment, the effectiveness parameter, the energy proportion parameter and the effective capacity parameter of the effective crack in the fracturing crack are respectively obtained in the fracturing crack evaluation process, so that the fracturing crack is comprehensively evaluated in three aspects of effectiveness, energy and capacity, the fracturing effect evaluation result is more accurate, various factors are comprehensively considered, the problem of evaluating a single plane is avoided, reference can be provided for fracturing conditions in the same type of well drilling, further evaluation and sequencing are carried out on the fracturing crack meeting the requirement, the fracturing effect evaluation process is further refined, and a basis is provided for subsequent fracturing effect evaluation. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A method for evaluating a fracturing effect, comprising:
obtaining a fracturing image after the fracturing inside a well is finished and related parameters of the fracturing fracture;
performing image recognition on the fracturing image to obtain a plurality of fracture images, and performing effectiveness analysis on the fracture images to obtain effective fracture images, wherein each effective fracture image corresponds to one effective fracture;
calculating the effectiveness of the effective crack images to respectively obtain the effectiveness parameters of each effective crack;
acquiring energy intensity before and after the effective fracture is fractured, and determining an energy proportion parameter of the effective fracture according to an energy intensity difference value before and after the effective fracture is fractured;
determining an effective productivity ratio parameter of each effective fracture according to the related parameters of the fracturing fractures;
and calculating an evaluation parameter of each effective crack according to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter, and sequencing each effective crack according to the evaluation parameters to obtain the effective crack with the best fracturing effect.
2. The method for evaluating the fracturing effect according to claim 1, wherein the analyzing the effectiveness of the fracture image to obtain an effective fracture image comprises:
acquiring a normal image before fracture of the fracture image, and extracting an edge image of the fracture image according to the difference between the normal image and the fracture image;
acquiring edge pressure information and fracture pressure information of corresponding positions of the edge image and the fracture image in a well in a rock stratum fracturing simulation mode;
calculating a pressure difference between the fracture pressure information and the edge pressure information;
and taking the corresponding fracture image as the effective fracture image when the pressure difference value is larger than a first pressure threshold value.
3. The method for evaluating the fracturing effect according to claim 2, wherein the obtaining of the edge pressure information and the fracture pressure information of the corresponding positions of the edge image and the fracture image in the well by means of the rock stratum fracturing simulation comprises:
determining a first region within the borehole from the fracture image and dividing the first region into a plurality of first partitions;
performing stimulation simulation on the first area to obtain the instantaneous pressure value of each first subarea, and taking the maximum instantaneous pressure value as the fracture pressure information of the fracture image;
determining a second region within the borehole from the edge image, dividing the second region into a plurality of second partitions;
performing fracture simulation on the second area to obtain a fractured pressure critical value of each second subarea;
taking the minimum pressure critical value as the edge pressure information of the edge image;
wherein each of the first regions is in critical contact with at least one of the second regions after the first and second regions are divided.
4. The method for evaluating the fracturing effect according to claim 3, wherein the calculating the effectiveness of the effective fracture images to obtain the effectiveness parameter of each effective fracture comprises:
determining whether each of the first partitions is effective by vibration simulation, wherein the effective first partitions are used as effective areas of the effective cracks;
determining an effective area ratio of the effective cracks according to an area ratio between the effective area and the effective cracks;
acquiring the associated cracks around the effective crack image, and calculating the contribution rate of the associated cracks to the yield increase of the fracture cracks;
calculating the effectiveness parameter of the effective fracture from the effective area ratio and the contribution ratio.
5. The fracturing effect evaluation method according to claim 4, wherein the obtaining of the energy intensity before and after the effective fracture fracturing and the determining of the energy proportion parameter of the effective fracture according to the energy intensity difference before and after the effective fracture fracturing comprise:
acquiring a first energy mean value born by each region of the effective fracture before fracturing and a second energy mean value when each region of the effective fracture is fractured;
calculating the energy difference value according to the first energy mean value and the second energy mean value;
and calculating the energy proportion parameter of the effective crack according to the area of the effective region and the energy difference value.
6. The method for evaluating the fracturing effect according to claim 4, wherein the determining the effective energy-to-capacity ratio parameter of each effective fracture according to the related parameters of the fracturing fracture comprises the following steps:
obtaining the effective period and daily average yield increase of the fracturing fracture;
calculating the capacity ratio of the fracturing fracture according to the effective period and the daily average yield increase;
and determining an effective productivity ratio parameter of the effective fracture according to the proportional relation between the effective fracture and the fractured fracture.
7. The method for evaluating the fracturing effect of claim 1, wherein the step of calculating an evaluation parameter of each effective fracture according to the effectiveness parameter, the energy ratio parameter and the effective productivity ratio parameter and sequencing each effective fracture according to the evaluation parameter to obtain the effective fracture with the best fracturing effect comprises the following steps:
respectively giving a first weight, a second weight and a third weight to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter according to a neural network model;
calculating an evaluation parameter of the effective fracture according to the first weight, the second weight and the third weight and the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter;
ranking the evaluation parameters of each of the effective fractures;
and selecting the effective fracture with the maximum evaluation parameter as an optimal fracture.
8. A fracture effectiveness evaluation system, comprising:
the parameter acquisition module is used for acquiring a fracturing image after the fracturing inside the well drilling is finished and related parameters of the fracturing fracture;
the analysis module is used for carrying out image recognition on the fracturing image to obtain a plurality of fracture images, and carrying out effectiveness analysis on the fracture images to obtain effective fracture images, wherein each effective fracture image corresponds to one effective fracture;
the effectiveness calculation module is used for calculating the effectiveness of the effective crack images so as to respectively obtain the effectiveness parameters of each effective crack;
the energy calculation module is used for acquiring the energy intensity before and after the effective fracture is fractured and determining the energy proportion parameter of the effective fracture according to the energy intensity difference before and after the effective fracture is fractured;
the productivity calculation module is used for determining an effective productivity ratio parameter of each effective crack according to the related parameters of the fracturing cracks;
and the comprehensive evaluation module is used for calculating an evaluation parameter of each effective crack according to the effectiveness parameter, the energy proportion parameter and the effective productivity ratio parameter, and sequencing each effective crack according to the evaluation parameters to obtain the effective crack with the best fracturing effect.
9. A storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the fracture effectiveness evaluation method according to any one of claims 1 to 7.
10. An electronic device, comprising: a processor and a memory;
the memory is used for storing a computer program;
the processor is configured to execute the computer program stored in the memory to cause the terminal to perform claim 1
The method for evaluating a fracturing effect of any one of claims to 7.
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