Frac-hit channel identification method and apparatus, and device

Abstract

Disclosed in the present application are a frac-hit channel identification method and apparatus, and a device. The method comprises: identifying a fracture communication zone existing between a well to be fractured and producing wells adjacent thereto; determining the slip trend of a fracture of the well to be fractured in the fracture communication zone, and on the basis of the slip trend of the fracture of the well to be fractured, determining the frac-hit risk level of the fracture of the well to be fractured; for each of the adjacent producing wells, determining the location where the producing well undergoes a complex weight-on-bit situation in the fracture communication zone during drilling, and on the basis of the distance between the location where the producing well undergoes the complex weight-on-bit situation and the location where a fracture of the production well develops, determining a reliability evaluation result of the fracture of the producing well; and on the basis of the frac-hit risk level of the fracture of the well to be fractured and the reliability evaluation result of the fracture of the producing well in the fracture communication zone, performing frac-hit channel identification on the well to be fractured. Frac-hit channels between a well to be fractured and producing wells and the frac-hit risk of the well to be fractured can be finely identified, thereby providing rational frac-hit risk prevention measures and fracturing optimization measures, and achieving the effect of "frac-hit mitigation and productivity increase".

Description

A channeling identification method, device and equipment

[0001] Cross-reference to Related Applications

[0002] This application claims the benefit of Chinese Patent Application No. 202410816099.6, filed on June 24, 2024, the contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of shale gas exploration and development, in particular to a channeling identification method, a channeling identification device, a computer readable storage medium, a computer device and a computer program product containing instructions. BACKGROUND

[0004] Shale gas exploration and development technology is a series of scientific and technological methods for exploring, evaluating and exploiting natural gas resources buried in shale layers. With the continuous exploration and practice of shale gas exploration and development, shale gas development has achieved good results. As an important guarantee for increasing natural gas reserves and production, shale gas development has great potential and usually requires fracturing technology to obtain natural productivity.

[0005] However, due to the complex geological conditions of shale gas reservoirs, strong reservoir heterogeneity, and well-developed microstructure and microfracture, channeling frequently occurs during fracturing, which seriously restricts the construction efficiency and development effect.

[0006] SUMMARY

[0007] The purpose of the embodiments of the present application is to provide a channeling identification method, device and equipment to solve the problem of overcoming the serious channeling in the process of shale gas development, which has a great impact on gas well productivity.

[0008] To achieve the above-mentioned purpose, the first aspect of the present application provides a channeling identification method, which can include:

[0009] Identifying a fracture communication zone existing between a well to be fractured and its adjacent production well;

[0010] Determining the slip trend of the fracture of the well to be fractured in the fracture communication zone, and determining the channeling risk level of the fracture of the well to be fractured according to the slip trend of the fracture of the well to be fractured;

[0011] For each of the adjacent production wells, determining the position of the production well in the fracture communication zone where the drilling pressure complexity occurs during drilling, and determining the reliability evaluation result of the fracture of the production well according to the distance between the position where the drilling pressure complexity of the production well occurs and the development position of the fracture of the production well;

[0012] According to the fracture communication zone in the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results, the fracture channeling channel identification of the well to be killed is carried out.

[0013] In one or some optional embodiments, the fracture channeling channel identification according to the fracture communication zone in the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results comprises:

[0014] According to the fracture communication zone in the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results, the level of the fracture channeling channel formed during the fracturing of the well to be killed is determined.

[0015] According to the level of the fracture channeling channel formed during the fracturing of the well to be killed, the fracture development section corresponding to the well to be killed is determined.

[0016] In one or some optional embodiments, the level of the fracture channeling channel formed during the fracturing of the well to be killed is determined according to the fracture communication zone in the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results, comprising:

[0017] According to the fracture communication zone in the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results and the preset fracture channeling channel identification standard, the level of the fracture channeling channel formed during the fracturing of the well to be killed is determined; wherein the preset fracture channeling channel identification standard comprises:

[0018] If the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results are both high, the level of the fracture channeling channel is first level;

[0019] If the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results are only one high, the level of the fracture channeling channel is second level;

[0020] If the well to be killed fracture channeling risk level and the production well fracture reliability evaluation results are both low, the level of the fracture channeling channel is third level.

[0021] In one or some optional embodiments, after the fracture development section corresponding to the well to be killed is determined according to the level of the fracture channeling channel formed during the fracturing of the well to be killed, the fracture channeling channel identification method further comprises:

[0022] According to the fracture development section of the well to be killed fracture development section, the fracture channeling treatment strategy of the fracture development section is determined.

[0023] In one or some optional embodiments, after the fracture development section corresponding to the well to be killed is determined according to the level of the fracture channeling channel formed during the fracturing of the well to be killed, the fracture channeling channel identification method further comprises:

[0024] determining a fracturing channeling prevention measure for the fracture development section according to the channeling risk level of the fracture development section.

[0025] In one or some optional embodiments, the identifying the fracture communication zone existing between the well to be fractured and the adjacent production well, comprises:

[0026] analyzing the fracture development condition and the interwell fracture communication condition of the well to be fractured according to seismic data, geological data, core data, drilling logging data and fracturing production data, and identifying the fracture communication zone existing between the well to be fractured and the adjacent production well.

[0027] In one or some optional embodiments, the determining the fracturing tendency of the fracture of the well to be fractured in the fracture communication zone and determining the channeling risk level of the fracture of the well to be fractured in the fracture communication zone according to the fracturing tendency of the fracture of the well to be fractured in the fracture communication zone, comprises:

[0028] determining the fracture prediction result of the well to be fractured according to seismic data, geological data, core data and drilling logging data of the well to be fractured, and obtaining the fracturing tendency of the fracture of the well to be fractured in the fracture communication zone;

[0029] judging whether the fracturing tendency of the fracture of the well to be fractured in the fracture communication zone exceeds a preset fracturing tendency threshold value;

[0030] if yes, determining that the channeling risk level of the fracture of the well to be fractured in the fracture communication zone is high;

[0031] otherwise, determining that the channeling risk level of the fracture of the well to be fractured in the fracture communication zone is low.

[0032] In one or some optional embodiments, the determining the position of the drilling pressure complex condition of the production well in the fracture communication zone, determining the reliability evaluation result of the fracture of the production well in the fracture communication zone according to the distance between the position of the drilling pressure complex condition of the production well in the drilling process and the development position of the fracture of the production well, comprises:

[0033] obtaining the position of the drilling pressure complex condition of the production well in the fracture communication zone according to fracturing production data; the drilling pressure complex condition of the production well comprises the lost circulation and overflow condition of the production well in the drilling process, and the casing deformation and channeling condition of the production well in the actual fracturing process;

[0034] judging whether the distance between the position of the drilling pressure complex condition of the production well and the development position of the fracture of the production well exceeds a preset distance threshold value;

[0035] if yes, the reliability evaluation result of the fracture of the production well in the fracture communication zone is low;

[0036] Otherwise, the reliability evaluation result of the fracture of the production well in the fracture communication zone is high.

[0037] In a second aspect, the embodiments of the present application provide a channeling identification device, comprising:

[0038] A first identification module is configured to identify a fracture communication zone between the well to be killed and the adjacent production well;

[0039] A first determination module is configured to determine a slip trend of the fracture of the well to be killed in the fracture communication zone, and determine a channeling risk level of the fracture of the well to be killed according to the slip trend of the fracture of the well to be killed;

[0040] A second determination module is configured to determine, for each of the adjacent production wells, a position of the production well in the fracture communication zone where a drilling pressure complication occurs during drilling, and determine a reliability evaluation result of the fracture of the production well according to a distance between the position where the drilling pressure complication occurs and a development position of the fracture of the production well;

[0041] A second identification module is configured to perform channeling identification of the well to be killed according to the channeling risk level of the fracture of the well to be killed and the reliability evaluation result of the fracture of the production well in the fracture communication zone.

[0042] In a third aspect, the embodiments of the present application provide a computer readable storage medium having a computer program stored thereon, the program being executed by a processor to implement the channeling identification method of the first aspect.

[0043] In a fourth aspect, the embodiments of the present application provide a computer device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the channeling identification method of the first aspect when executing the program.

[0044] In a fifth aspect, the embodiments of the present application provide a computer program product comprising instructions, which, when the computer program product is executed on a computer device, cause the computer device to perform the channeling identification method of the first aspect.

[0045] The above technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0046] The application provides a channel identification method, device and equipment, which identifies the fracture communication zone between the well to be killed and the adjacent production well, determines the sliding trend of the fracture of the well to be killed and the pressure channeling risk level, and determines the fracture reliability of the production well, so as to realize the channel identification. The channel between the well to be killed and the production well and the pressure channeling risk of the well to be killed can be finely identified, so that reasonable pressure channeling risk prevention measures and fracturing optimization measures can be proposed according to the identification result, the pressure channeling can be accurately prevented and controlled, the actual effect of reducing the pressure channeling and increasing the production can be achieved, the average production of the adjacent production well of the well to be killed can be improved, the pressure channeling degree and the pressure channeling influence can be reduced, and the pressure channeling recovery period of the adjacent production well after the pressure channeling is reduced.

[0047] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by means of the instrumentalities particularly pointed out in the written description and claims hereof.

[0048] The technical solutions of the present application will be described in detail below with the help of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the embodiments of the present application together with the specific embodiments below, but do not constitute a limitation on the embodiments of the present application. In the drawings:

[0050] Fig. 1 is a flow chart of the channel identification method provided in the embodiments of the present application;

[0051] Fig. 2 is a structural schematic diagram of the channel identification device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0053] In the prior art, the pre-frac channeling prediction work is easily neglected in the shale gas development process. Usually, after the channeling occurs, only simple methods such as shutting down are used to control the degree of influence of channeling. However, the applicant finds that as the shale gas exploitation degree increases, the drilling wells, the positive pressure wells and the production wells in the shale gas exploitation block are more and more intensive, the interwell relationship is more and more complex, the channeling condition is more and more complex, and the influence degree of the channeling degree change on the shale gas production is also increasing. Therefore, it is urgent to identify the channeling risk before fracturing of the well to be fractured, and to realize the channeling control and the fracturing optimization through the channeling channel identification. In view of the above problems, the present application is proposed to provide a channeling channel identification method, device and equipment which can overcome the above problems or at least partially solve the above problems.

[0054] The present application provides a channeling channel identification method in the embodiment, referring to FIG. 1, the method can include the following steps:

[0055] S101: identifying the fracture communication zone existing between the well to be fractured and its adjacent production well;

[0056] S102: determining the slip trend of the fracture of the well to be fractured in the fracture communication zone, and determining the channeling risk grade of the fracture of the well to be fractured according to the slip trend of the fracture of the well to be fractured;

[0057] S103: for each of the adjacent production well, determining the position of the production well in the fracture communication zone where the drilling pressure complex condition occurs in the drilling process, and determining the fracture reliability evaluation result of the production well according to the distance between the position where the drilling pressure complex condition occurs in the production well and the development position of the fracture of the production well;

[0058] S104: performing the channeling channel identification of the well to be fractured according to the channeling risk grade of the fracture of the well to be fractured in the fracture communication zone and the fracture reliability evaluation result of the production well.

[0059] The present application provides a channeling channel identification method, which identifies the fracture communication zone existing between the well to be fractured and its adjacent production well, determines the slip trend and the channeling risk grade of the fracture of the well to be fractured, and determines the fracture reliability of the production well, so as to realize the channeling channel identification. The channeling channel between the well to be fractured and the production well and the channeling risk of the well to be fractured can be finely identified, so that reasonable channeling risk prevention measures and fracturing optimization measures can be proposed according to the identification result, the channeling can be accurately prevented and controlled, the actual effect of “reducing channeling and increasing production” can be achieved, the average production of the adjacent production well of the well to be fractured can be improved, the degree of channeling and the influence of channeling can be reduced, and the channeling recovery period of the adjacent production well after the channeling is reduced.

[0060] In an optional embodiment, in the step S101, the well to be shut in is a shale gas well to be fractured. Before fracturing the well to be shut in, seismic data, geological data, core data and drilling logging data of the well to be shut in are needed to be obtained, and seismic data, geological data, core data, drilling logging data and fracturing production data of the adjacent production well are also needed to be obtained. The seismic data can include seismic curvature, ant body and GR result plan of the well to be shut in. The geological data include regional geological survey report, stratum sequence, lithological characteristics, sedimentary environment analysis and the like. The core data include physical characteristic data of the core sampled by drilling, such as mineral composition, rock structure, porosity, permeability, organic matter type and maturity. The drilling logging data include drilling data, logging data and logging data. The fracturing production data include a series of data and information needed before, during and after the hydraulic fracturing operation, such as fracturing fluid formula, proppant selection, injection rate, pressure and volume in the construction scheme, real-time injection pressure, flow rate, cumulative injection volume, sanding intensity, liquid intensity in the fracturing operation, fracturing effect monitoring and evaluation records including fracturing operation time, equipment state used, abnormal event record, microseismic monitoring data, pressure drop test and flow test data, output analysis such as gas component, water invasion data, wellhead production data and downhole monitoring data.

[0061] In the step S101, the fracture communication zone between the well to be shut in and the adjacent production well is identified, specifically including:

[0062] According to the fracture development condition and the interwell fracture communication condition of the well to be shut in analyzed by the seismic data, the geological data, the core data, the drilling logging data and the fracturing production data, the fracture communication zone between the well to be shut in and the adjacent production well is identified.

[0063] Specifically, the fracture communication zone between the well to be shut in and the adjacent production well can be identified according to the seismic curvature, the ant body and the GR result plan in the seismic data. In the analysis process, the geological data, the core data, the drilling logging data and the fracturing production data of the production well can be used for assistance. According to the comprehensive analysis of the geological data, the core data, the drilling logging data and the fracturing production data, the fracture development condition in the fracture communication zone is predicted, and the interwell fracture communication condition is determined, so that the fracture communication zone between the well to be shut in and the adjacent production well is identified according to the fracture development condition and the interwell fracture communication condition of the well to be shut in.

[0064] In an optional embodiment, in the step S102, the slip trend of the fracture of the well to be shut in in the fracture communication zone is determined, and the fracturing channeling risk level of the fracture of the well to be shut in in the fracture communication zone is determined according to the slip trend of the fracture of the well to be shut in in the fracture communication zone, specifically including:

[0065] obtaining a fracture prediction result of the well to be killed according to seismic data, geological data, core data and drilling and logging data of the well to be killed, to obtain a sliding trend of the fracture of the well to be killed in the fracture communication zone;

[0066] determining whether the sliding trend of the fracture of the well to be killed in the fracture communication zone exceeds a preset sliding trend threshold;

[0067] if yes, determining that the pressure channeling risk level of the fracture of the well to be killed in the fracture communication zone is high;

[0068] otherwise, determining that the pressure channeling risk level of the fracture of the well to be killed in the fracture communication zone is low.

[0069] In the embodiments of the present application, the fracture prediction result of the well to be killed can be determined according to the seismic data, geological data, core data and drilling and logging data of the well to be killed. For example, the seismic GR fracture prediction result can be obtained by using the seismic data GR software (i.e. GR Structure fracture system imaging and reservoir connectivity analysis system), so as to obtain the sliding trend of the fracture of the well to be killed in the fracture communication zone according to the seismic GR fracture prediction result, and the pressure channeling risk of the fracture is quantitatively characterized by the sliding trend of the fracture of the well to be killed in the fracture communication zone.

[0070] In the embodiments of the present application, the fracture prediction of the well to be killed can be realized by using a fracture prediction model. The seismic data, geological data, core data and drilling and logging data of the well to be killed are input into the fracture prediction model to obtain the fracture prediction result of the well to be killed. The fracture prediction model can use a machine learning model in the prior art, and the training of the model can be realized by using the method in the prior art. For example, one or more of the seismic data, geological data, core data and drilling and logging data of a plurality of production wells can be obtained, sample data sets are processed, and the machine learning model to be trained is trained based on the sample data sets to obtain the fracture prediction model. The specific implementation method can refer to the detailed description in the prior art, and will not be limited here.

[0071] In the embodiments of the present application, the pressure channeling risk level of the fracture of the well to be killed is determined according to whether the sliding trend of the fracture of the well to be killed in the fracture communication zone exceeds the preset sliding trend threshold. The preset sliding trend threshold can be determined according to the actual situation. For example, if the preset sliding trend threshold is 0.5, the sliding trend of the fracture of the well to be killed in the fracture communication zone is greater than 0.5, it is determined that the pressure channeling risk level of the fracture of the well to be killed in the fracture communication zone is high, and the sliding trend of the fracture of the well to be killed in the fracture communication zone is less than or equal to 0.5, it is determined that the pressure channeling risk level of the fracture of the well to be killed in the fracture communication zone is low.

[0072] In an optional embodiment, in step S103, the position of the drilling pressure complex situation of the production well in the fracture communication zone is determined according to the distance between the position of the drilling pressure complex situation of the production well in the drilling process and the development position of the fracture of the production well, and the reliability evaluation result of the fracture of the production well in the fracture communication zone is determined, specifically including:

[0073] According to the fracturing production data, the position of the drilling pressure complex situation of the production well in the fracture communication zone is obtained by statistics; the drilling pressure complex situation of the production well includes the lost circulation and overflow situation of the production well in the drilling process, and the casing deformation and pressure channeling situation of the production well in the actual fracturing process;

[0074] It is judged whether the distance between the position of the drilling pressure complex situation of the production well and the development position of the fracture of the production well exceeds a preset distance threshold value;

[0075] If yes, the reliability evaluation result of the fracture of the production well in the fracture communication zone is low;

[0076] Otherwise, the reliability evaluation result of the fracture of the production well in the fracture communication zone is high.

[0077] In the embodiments of the present application, the development position of the fracture of the production well is determined according to the fracturing situation analysis of the production well before fracturing, and the specific implementation manner can refer to the detailed description in the prior art, and here, it can not be specifically limited. The preset distance threshold value can be determined according to the actual situation, for example, it can be 20 meters. After the position of the drilling pressure complex situation is determined, the position of the drilling pressure complex situation can be corresponded with the development position of the fracture. If there is a drilling pressure complex situation within 20 meters near the development position of the fracture, it is proved that the reliability evaluation result of the fracture of the production well in the fracture communication zone is high; if there is no drilling pressure complex situation within 20 meters near the development position of the fracture, it is proved that the reliability evaluation result of the fracture of the production well in the fracture communication zone is low.

[0078] In an optional embodiment, in step S104, the pressure channeling identification of the well to be fractured is performed according to the fracture channeling risk level of the well to be fractured in the fracture communication zone and the reliability evaluation result of the fracture of the production well, including:

[0079] According to the fracture channeling risk level of the well to be fractured in the fracture communication zone and the reliability evaluation result of the fracture of the production well, the level of the pressure channeling channel formed when the well to be fractured is fractured is determined;

[0080] According to the level of the pressure channeling channel formed when the well to be fractured is fractured, the pressure channeling risk level of the fracture development section corresponding to the well to be fractured is determined.

[0081] In a specific embodiment, the step of determining the level of the channeling path formed during the fracturing of the well to be shut in according to the risk level of the channeling of the fracture in the fracture communication zone and the reliability evaluation result of the fracture in the production well specifically includes:

[0082] The level of the channeling path formed during the fracturing of the well to be shut in is determined according to the risk level of the channeling of the fracture in the fracture communication zone and the reliability evaluation result of the fracture in the production well and a preset channeling path identification standard, wherein the preset channeling path identification standard includes:

[0083] If the risk level of the channeling of the fracture in the well to be shut in and the reliability evaluation result of the fracture in the production well are both high, the level of the channeling path is level one.

[0084] If only one of the risk level of the channeling of the fracture in the well to be shut in and the reliability evaluation result of the fracture in the production well is high, the level of the channeling path is level two.

[0085] If the risk level of the channeling of the fracture in the well to be shut in and the reliability evaluation result of the fracture in the production well are both low, the level of the channeling path is level three.

[0086] In a specific embodiment, the step of determining the risk level of the channeling of the fracture development section corresponding to the well to be shut in according to the level of the channeling path formed during the fracturing of the well to be shut in specifically includes: if the channeling path is level one, the fracture development section of the well to be shut in is a first-level channeling risk section; if the channeling path is level two, the fracture development section of the well to be shut in is a second-level channeling risk section; and if the channeling path is level three, the fracture development section of the well to be shut in is a third-level channeling risk section.

[0087] In a specific embodiment, after the step S104 of determining the risk level of the channeling of the fracture development section corresponding to the well to be shut in according to the level of the channeling path formed during the fracturing of the well to be shut in, the method can further include:

[0088] A fracturing channeling treatment strategy for the fracture development section is determined according to the risk level of the channeling of the fracture development section of the well to be shut in.

[0089] In the embodiments of the present application, by identifying the channeling risk level of the fracture development section of the well to be fractured, during the fracturing process of the well to be fractured, a corresponding channeling treatment strategy can be taken according to the identified channeling risk level of the fracture development section of the well to be fractured, so as to achieve the purpose of preventing channeling and reducing channeling, and avoid the loss of shale gas production caused by channeling. Specifically, the fracture development section of the well to be fractured can be optimized according to different channeling risk levels. For example, for the first-class channeling risk section, a segment cluster optimization scheme of increasing the single segment fracturing section length by 10-15 m and increasing the cluster spacing by 2-3 m can be used, that is, the single segment fracturing section length is increased by 10-15 m based on the conventional single segment fracturing section length, and the cluster spacing is increased by 2-3 m based on the conventional cluster spacing; for the second-class channeling risk section, a segment cluster optimization scheme of increasing the single segment fracturing section length by 5-10 m and increasing the cluster spacing by 1-2 m can be used, that is, the single segment fracturing section length is increased by 5-10 m based on the conventional single segment fracturing section length, and the cluster spacing is increased by 1-2 m based on the conventional cluster spacing; for the third-class channeling risk section, the segment cluster division scheme is not adjusted, that is, the conventional single segment fracturing section length and the conventional cluster spacing are used.

[0090] In a specific embodiment, after performing the above step S104, determining the channeling risk level of the corresponding fracture development section of the well to be fractured according to the level of the channeling channel formed during the fracturing of the well to be fractured, the method can further include:

[0091] According to the channeling risk level of the fracture development section of the well to be fractured, determining the fracturing channeling prevention measures of the fracture development section.

[0092] In the embodiments of the present application, by identifying the channeling risk level of the fracture development section of the well to be fractured, before fracturing of the well to be fractured, the corresponding channeling prevention measures can be determined according to the identified channeling risk level of the fracture development section of the well to be fractured, and a channeling risk prompt is given, so that the construction personnel can take corresponding measures according to the prompted channeling risk to avoid channeling or reduce the influence degree of channeling. For example, before fracturing of the well to be fractured, the channeling risk level of the fracture development section of the fracturing section is prompted, and the corresponding channeling prevention measures are prompted, wherein the channeling prevention measures can be a prompt to shut in the adjacent production well, a prompt to adjust the fracturing construction process of the fracturing section, or a prompt to strengthen monitoring of the adjacent production well. For example, before fracturing of the production well, the production scale of each adjacent production well of the well to be fractured is obtained, if the production scale of the adjacent production well is small and the channeling risk level of the fracture development section is high, the adjacent production well is prompted to be shut in; before fracturing of the production well, the fracturing construction process scale of the fracturing section of the well to be fractured is reduced according to the channeling risk level of the fracture development section, including reducing the sanding intensity or liquid intensity during fracturing; before fracturing of the production well, the pressure range of the adjacent well pressure monitoring is determined according to the channeling risk level of the fracture development section, the higher the channeling risk level of the fracture development section, the smaller the pressure range of the adjacent well pressure monitoring, so that during the fracturing process, once the pressure change of the adjacent production well exceeds the pressure range, the fracturing well construction parameters can be adjusted in time to effectively prevent the channeling risk.

[0093] Based on the channeling passage identification method provided in the embodiments of the present application, more than 30 shale gas horizontal wells in a certain block in Sichuan Basin are identified for channeling passage and fracturing optimization design, and it is found that after the method is adopted, the channeling degree of the adjacent production well of the well to be fractured in the block during the fracturing process of the well to be fractured is significantly reduced, and the average production is significantly increased. The influence on the adjacent production well during the fracturing process of the well to be fractured is significantly reduced, compared with the production of the adjacent production well during the fracturing process of the well to be fractured before the method is implemented, the average production of the adjacent production well of the well to be fractured for channeling passage identification by adopting the method is increased by 10%, and in the case of channeling, the channeling recovery period of the adjacent production well is significantly shortened.

[0094] Based on the same application concept, a channeling passage identification device is further provided in the embodiments of the present application, which can include:

[0095] The first identification module 101 is configured to identify the fracture communication zone between the well to be fractured and the adjacent production well thereof;

[0096] The first determination module 102 is configured to determine the sliding trend of the fracture of the well to be fractured in the fracture communication zone, and determine the channeling risk level of the fracture of the well to be fractured according to the sliding trend of the fracture of the well to be fractured;

[0097] The second determining module 103 is configured to determine, for each of the adjacent production well, a position of the production well in the fracture communication zone where a drilling pressure complexity occurs in the drilling process, and determine the fracture reliability evaluation result of the production well according to a distance between the position of the production well where the drilling pressure complexity occurs and the development position of the fracture of the production well.

[0098] The second identifying module 104 is configured to identify the channeling communication channel of the well to be shut in according to the fracture communication zone between the well to be shut in and the adjacent production well, the fracture channeling risk level of the well to be shut in and the fracture reliability evaluation result of the production well.

[0099] The embodiments of the present application provide a channeling communication channel identification device, which identifies the fracture communication zone between the well to be shut in and the adjacent production well, determines the sliding trend and the channeling risk level of the fracture of the well to be shut in, and determines the fracture reliability of the production well, so as to realize the channeling communication channel identification. The channeling communication channel between the well to be shut in and the production well and the channeling risk of the well to be shut in can be finely identified, so that reasonable channeling risk prevention measures and fracturing optimization measures can be proposed according to the identification result, the channeling can be accurately prevented and controlled, the actual effect of "reducing channeling and increasing production" can be achieved, the average production of the adjacent production well of the well to be shut in can be improved, the degree of channeling and the influence of channeling can be reduced, and the channeling recovery period of the adjacent production well after channeling can be reduced.

[0100] Based on the same application concept, the embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the program is executed by a processor to realize the channeling communication channel identification method.

[0101] Based on the same application concept, the embodiments of the present application further provide a computer device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the program to realize the channeling communication channel identification method.

[0102] Based on the same application concept, the embodiments of the present application further provide a computer program product containing instructions, which, when the computer program product is executed on a computer device, causes the computer device to execute the channeling communication channel identification method.

[0103] The above device, computer readable storage medium, computer device and computer program product containing instructions in the embodiments of the present application solve the same problem as the above method, so the implementation can refer to the implementation of the above method, and the repeated parts will not be described here.

[0104] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a software embodiment, various elements are implemented in hardware, firmware, or software, or combinations thereof. In embodiments implemented in software, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media can be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired computer program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or other

[0105] The present application is described in reference to the drawings, which are as follows:

[0106] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0107] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0108] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method for identifying channel distortion, characterized in that, include: Identify the fracture communication zone between the well to be put into production and its adjacent production wells; Determine the slippage trend of the fractures in the fracture communication zone of the well to be pressured, and determine the pressure channeling risk level of the fractures in the well to be pressured based on the slippage trend of the fractures in the well to be pressured; For each adjacent production well, the location in the fracture communication zone where the production well experienced complex drilling pressure during drilling is determined. Based on the distance between the location where the production well experienced complex drilling pressure and the location of the fracture development in the production well, the fracture reliability evaluation result of the production well is determined. Based on the pressure channeling risk level of the well to be pressured in the fracture communication zone and the reliability evaluation results of the fractures in the production well, the pressure channeling channels of the well to be pressured are identified.

2. The method according to claim 1, characterized in that, The step of identifying the pressure channel in the well to be controlled based on the pressure channeling risk level of the fracture in the fracture communication zone and the fracture reliability evaluation results of the production well includes: Based on the risk level of fracture channeling in the well to be fractured in the fracture communication zone and the reliability evaluation results of the fracture in the production well, the level of the channeling channel formed during the fracture of the well to be fractured is determined; Based on the grade of the pressure channel formed during the fracturing of the well to be fracturing, the pressure channeling risk level of the fracture development section corresponding to the well to be fracturing is determined.

3. The method according to claim 1, characterized in that, The determination of the level of the pressure channel formed during fracturing of the well to be fracturing, based on the pressure channel risk level of the fracture in the fracture communication zone of the well to be fracturing and the fracture reliability evaluation results of the well in production, includes: Based on the fracture channeling risk level of the well to be fractured in the fracture communication zone and the fracture reliability evaluation results of the production well, and the preset fracture channeling identification criteria, the level of the fracture channeling formed during the fracturing of the well to be fractured is determined; wherein, the preset fracture channeling identification criteria include: If the risk level of fracture channeling in the well to be controlled and the reliability evaluation result of fractures in the well to be put into production are both high, then the level of the channeling channel is level one. If the risk level of fracture channeling in the well to be controlled and the reliability evaluation result of fractures in the well to be put into production are both high, then the level of the channeling channel is level two. If the risk level of fracture channeling in the well to be controlled and the reliability evaluation result of fractures in the well to be put into production are both low, then the level of the channeling channel is level three.

4. The method according to claim 2 or 3, characterized in that, After determining the risk level of the fracture development section corresponding to the well to be fractured based on the level of the fracture channel formed during the fracturing of the well to be fractured, the method further includes: Based on the risk level of fracture development in the fractured section of the well to be controlled, a fracturing and fracture-crossing treatment strategy is determined for the fractured section.

5. The method according to claim 2 or 3, characterized in that, After determining the risk level of the fracture development section corresponding to the well to be fractured based on the level of the fracture channel formed during the fracturing of the well to be fractured, the method further includes: Based on the risk level of fracture channeling in the fractured section of the well to be controlled, determine the fracturing and channeling prevention measures for the fractured section.

6. The method according to claim 1, characterized in that, The identification of fracture communication zones between the well to be put into production and its neighboring wells includes: Based on seismic data, geological data, core data, drilling and logging data, and fracturing production data, the fracture development and inter-well fracture communication of the well to be fractured are analyzed, and the fracture communication zone between the well to be fractured and the adjacent production well is identified.

7. The method according to claim 1, characterized in that, The process of determining the slippage trend of the fractures in the fracture communication zone and, based on the slippage trend, determining the pressure channeling risk level of the fractures in the fracture communication zone includes: Based on the seismic data, geological data, core data and drilling logging data of the well to be controlled, the fracture prediction results of the well to be controlled are determined, and the slip trend of the fracture in the fracture communication zone of the well to be controlled is obtained. Determine whether the slippage trend of the fracture in the fracture communication zone of the well to be controlled exceeds a preset slippage trend threshold; If so, the pressure channeling risk level of the fractures in the well to be pressured in the fracture communication zone is determined to be high. Otherwise, the pressure channeling risk level of the fractures in the well to be pressured in the fracture communication zone is determined to be low.

8. The method according to claim 1, characterized in that, The process of determining the location of the drilling pressure complexity situation in the production well within the fracture communication zone, and determining the reliability evaluation result of the fractures in the production well within the fracture communication zone based on the distance between the location of the drilling pressure complexity situation and the location of the fracture development in the production well, includes: Based on fracturing production data, the locations of drilling and pressure complexity of the production wells in the fracture communication zone were statistically determined; the drilling and pressure complexity of the production wells includes well leakage and overflow during the drilling process, as well as casing deformation and pressure channeling during the actual fracturing process. Determine whether the distance between the location where the drilling pressure in the production well is complicated and the location where the fractures in the production well develop exceeds a preset distance threshold; If so, the reliability evaluation result of the fracture in the production well in the fracture communication zone is low. Otherwise, the reliability evaluation result of the fractures in the production well in the fracture communication zone is high.

9. A pressure channel identification device, characterized in that, include: The first identification module is used to identify the fracture communication zone between the well to be put into production and its adjacent production wells; The first determining module is used to determine the slippage trend of the fracture in the fracture communication zone of the well to be pressured, and to determine the pressure channeling risk level of the fracture in the well to be pressured based on the slippage trend of the fracture in the well to be pressured. The second determining module is used to determine, for each of the adjacent production wells, the location in the fracture communication zone where the production well experienced a complex drilling pressure situation during drilling, and to determine the fracture reliability evaluation result of the production well based on the distance between the location where the production well experienced a complex drilling pressure situation and the location of the fracture development in the production well. The second identification module is used to identify the pressure channel of the well to be controlled based on the pressure channeling risk level of the fracture in the fracture communication zone and the reliability evaluation result of the fracture in the production well.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the compression channel identification method as described in any one of claims 1-8.

11. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the compression channel identification method as described in any one of claims 1-8.

12. A computer program product containing instructions, which, when run on a computer device, causes the computer device to perform the compression channel identification method as described in any one of claims 1-8.

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