Shale reservoir simulation development method and device considering inter-well densification and three-dimensional mining

Abstract

The invention relates to the technical field of shale oil and gas development, and provides a shale reservoir simulation development method and device considering inter-well densification and three-dimensional exploitation. The method comprises the following steps: receiving multiple groups of simulation development parameters of a target shale reservoir; determining a first target well, a second target well and a third target well in the dessert area of the target shale reservoir according to the current simulation development parameters; fracturing mining is conducted on the first target well, first simulation development engineering data are obtained, whether encryption mining and / or three-dimensional mining are / is conducted or not is judged, and corresponding target simulation development engineering data are obtained; determining a recovery ratio corresponding to the current simulation development parameters according to the target simulation development engineering data; iterating to obtain a plurality of recovery rates corresponding to the plurality of groups of simulation development parameters; and determining target simulation development parameters of the target shale reservoir by using the plurality of recovery rates. According to the embodiment of the invention, the development parameters of the shale reservoir can be efficiently and accurately determined, so that the resource utilization amount of the shale reservoir is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of shale oil and gas development, and in particular to a shale reservoir simulation development method and device taking into account well infilling and three-dimensional mining. Background Art

[0002] Large-scale hydraulic fracturing relies on large displacement and large liquid volume to form complex fracture networks in brittle shale reservoirs, realizing commercial exploitation of shale gas reservoirs with natural economic production capacity. At present, shale oil and gas development technology is in the exploratory stage. Shale reservoirs are all exploited by hydraulic fracturing through drilling horizontal wells. Hydraulic fracturing mainly creates fractures in shale storage to reduce the resistance to the seepage and discharge of oil and gas resources. However, due to reservoir differences and engineering technology limitations, the natural gas resources around the horizontal wells are easily mobilized and produced, and the resource mobilization in the areas far away from the horizontal wells between the horizontal wells is very uncertain. There are problems such as insufficient resource exploitation and a large gap between actual production and ideal production. Therefore, it is very important to simulate the exploitation of shale reservoirs. Considering that the pore type and permeability of shale reservoirs are important factors affecting the shale gas exploitation of shale reservoirs, the existing shale reservoir exploitation simulation methods are often studied around the structural core displacement shale mining device, but the conventional core displacement device and method are difficult to be directly used in the simulation of multi-layer and three-dimensional development of shale reservoirs, and the amount of data obtained by monitoring and measurement is limited, and there is a problem of insufficient scope of application. Summary of the invention

[0003] In view of the fact that the current conventional core displacement devices and methods are difficult to be directly used in the simulation of multi-layer and three-dimensional development of shale reservoirs, and the amount of data obtained by monitoring and measurement is limited and the scope of application is insufficient, resulting in low efficiency and poor accuracy in calculating the development parameters of shale reservoirs, this scheme is proposed to overcome the above problems or at least partially solve the above problems.

[0004] On the one hand, some embodiments of this specification aim to provide a shale reservoir simulation development method considering well infill and three-dimensional mining, the method comprising:

[0005] receiving multiple sets of simulated development parameters for a target shale reservoir;

[0006] According to the current simulation development parameters, a first target well, a second target well and a third target well are determined in the sweet spot of the target shale reservoir; wherein the second target well and the third target well are staggered between the first target well, the number of the second target well and the third target well is no more than half of the number of the first target well, and the second target well and the third target well are staggered with each other;

[0007] Performing fracturing production on the first target well to obtain first simulated development engineering data;

[0008] Determining whether to perform infill mining and / or stereo mining according to the first simulated development engineering data;

[0009] Carry out in-depth mining and / or three-dimensional mining according to the judgment results to obtain target simulation development engineering data;

[0010] Determining the recovery factor corresponding to the current simulation development parameters according to the target simulation development engineering data;

[0011] Repeat the above step of determining the corresponding recovery factor according to the simulated development parameters to obtain multiple recovery factors corresponding to the multiple sets of simulated development parameters;

[0012] Target simulation development parameters of the target shale reservoir are determined using the multiple recovery factors.

[0013] Furthermore, the original state corresponding to the sweet spot area of ​​the target shale reservoir is saturated methane gas; each target well includes a vertical well and a corresponding horizontal well; the vertical well and the horizontal well of each target well are distributed in a linear array in the horizontal and vertical directions respectively.

[0014] Furthermore, the first target well is subjected to hydraulic fracturing production, including: sequentially performing hydraulic fracturing treatment, well shut-in treatment and well opening and flowback treatment on the first target well.

[0015] Furthermore, the first simulated development engineering data includes at least one or more of hydraulic fracturing time, well shut-in time, well opening and flowback time, fluid flow, fluid flow rate, wellhead pressure, sand concentration, fracture height monitoring data, fracture distribution morphology monitoring data, and regional resistivity monitoring data.

[0016] Further, judging whether to perform in-depth mining and / or three-dimensional mining according to the first simulated development engineering data includes:

[0017] Determining a simulated production rate of a first target well according to the first simulated development engineering data;

[0018] Predicting the maximum production of a single well using the simulated production;

[0019] comparing the maximum production of the single well and the gas content of the target shale reservoir;

[0020] If the comparison result is within the first interval, non-densified mining or three-dimensional mining is performed;

[0021] If the comparison result is within the second interval, encrypted mining is performed;

[0022] If the comparison result is within the third interval, three-dimensional mining is carried out;

[0023] If the comparison result is within the fourth interval, encrypted mining and three-dimensional mining are performed.

[0024] Further, the target simulation development engineering data includes second simulation development engineering data and / or third simulation development engineering data;

[0025] The method of performing in-depth mining and / or three-dimensional mining according to the judgment result to obtain target simulation development engineering data includes:

[0026] If in-depth mining is to be carried out, fracturing mining is carried out on the second target well, and the second simulated development engineering data during the fracturing mining process is monitored in real time;

[0027] If three-dimensional mining is carried out, fracturing mining is carried out on the third target well, and the third simulated development engineering data during the fracturing mining process is monitored in real time;

[0028] If intensified mining and three-dimensional mining are carried out, the second target well and the third target well are subjected to fracturing mining, and the second simulated development engineering data and the third simulated development engineering data during the fracturing mining process are monitored in real time.

[0029] Furthermore, each set of simulated development parameters includes at least one or more of hydraulic fracturing time, well shut-in time, well opening and flowback time, fluid flow rate, fluid flow rate, wellhead pressure and sand concentration, and the number and relative spatial position information of the first target well, the second target well and the third target well.

[0030] Further, the target simulation development parameters of the target shale reservoir are determined by using the multiple recovery factors, including:

[0031] Determining the correlation between the plurality of groups of simulated development parameters and their corresponding recovery factors;

[0032] Determine the recovery factor that meets the preset conditions according to the association relationship;

[0033] The simulated development parameters corresponding to the recovery factor that meets the preset conditions are used as target simulated development parameters.

[0034] On the other hand, some embodiments of the present specification also provide a shale reservoir simulation development device considering well infill and three-dimensional mining, the device comprising:

[0035] A receiving module, used for receiving multiple groups of simulation development parameters of the target shale reservoir;

[0036] A target well determination module, used for determining a first target well, a second target well and a third target well in a sweet spot of a target shale reservoir according to current simulated development parameters; wherein the second target well and the third target well are staggered between the first target well, the number of the second target well and the third target well is no more than half of the number of the first target well, and the second target well and the third target well are staggered with each other;

[0037] A first fracturing module, used to perform fracturing production on the first target well to obtain first simulated development engineering data;

[0038] A judgment module, used for judging whether to perform in-depth mining and / or stereo mining according to the first simulated development engineering data;

[0039] The second fracturing module is used to perform intensified mining and / or three-dimensional mining according to the judgment result to obtain target simulation development engineering data;

[0040] A recovery factor determination module, used to determine the recovery factor corresponding to the current simulation development parameters according to the target simulation development engineering data;

[0041] An iteration module, used to repeat the above step of determining the corresponding recovery factor according to the simulated development parameters, to obtain multiple recovery factors corresponding to the multiple sets of simulated development parameters;

[0042] The target simulation development parameter determination module is used to determine the target simulation development parameters of the target shale reservoir using the multiple recovery factors.

[0043] On the other hand, some embodiments of the present specification further provide a computer device, including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, the instructions of the above method are executed.

[0044] On the other hand, some embodiments of the present specification further provide a computer storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor of a computer device, the instructions of the above method are executed.

[0045] One or more technical solutions provided by some embodiments of this specification have at least the following technical effects:

[0046] The embodiments of the present specification receive multiple groups of simulated development parameters of a target shale reservoir, and perform simulation for each group of simulated development parameters, determine a first target well, a second target well, and a third target well in a sweet spot of the target shale reservoir according to each group of simulated development parameters, and after completing the fracturing production for the first target well, determine whether it is necessary to further perform intensified production and / or three-dimensional production for the second target well and the third target well according to the first simulated development engineering data of the first target well, thereby realizing multi-directional development of the target shale reservoir, and calculating and analyzing multiple recovery factors corresponding to the multiple groups of simulated development parameters, and using the multiple recovery factors to determine the target simulated development parameters of the target shale reservoir, thereby efficiently and accurately determining the target ideal simulated development parameters of the target shale reservoir, so as to increase the oil and gas production of the shale reservoir.

[0047] The above description is only an overview of the technical solutions of some embodiments of this specification. In order to more clearly understand the technical means of some embodiments of this specification, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of some embodiments of this specification more obvious and easy to understand, the specific implementation methods of some embodiments of this specification are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate some embodiments of this specification or technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0049] Figure 1 A schematic diagram of an implementation system of a shale reservoir simulation development method considering well-to-well infilling and three-dimensional mining in some embodiments of this specification is shown;

[0050] Figure 2 A flow chart of a shale reservoir simulation development method considering well infilling and three-dimensional mining in some embodiments of this specification is shown;

[0051] Figure 3 A schematic diagram of the steps for determining whether to perform encrypted mining and / or stereo mining in some embodiments of this specification;

[0052] Figure 4 A schematic diagram of the steps for determining target simulation development parameters in some embodiments of this specification;

[0053] Figure 5a , Figure 5b , Figure 5c , Figure 5dA schematic diagram of the connection relationship of equipment used for shale reservoir well-to-well simulation development in some embodiments of this specification;

[0054] Figure 6 This is a schematic structural diagram of a shale reservoir simulation development device that considers well-to-well infilling and three-dimensional mining in some embodiments of this specification;

[0055] Figure 7 This is a schematic diagram of the computer device structure provided in some embodiments of this specification.

[0056] [Description of Reference Numerals]

[0057] 101. Terminal;

[0058] 102. Server;

[0059] 501, target well unit;

[0060] 5011, first target well subunit;

[0061] 5012, second target well subunit;

[0062] 5013, the third target well subunit;

[0063] 502. Flowback control unit;

[0064] 5021, fracturing fluid injection subunit;

[0065] 5022, wellhead control subunit;

[0066] 503, monitoring unit;

[0067] 5031, air flow detector;

[0068] 5032, liquid detector;

[0069] 5033, pressure sensor;

[0070] 504, Central Computing Unit;

[0071] 601, receiving module;

[0072] 602. Target well determination module;

[0073] 603, first fracturing module;

[0074] 604, judgment module;

[0075] 605, second fracturing module;

[0076] 606. Recovery factor determination module;

[0077] 607, Iteration module;

[0078] 608. Target simulation development parameter determination module;

[0079] 702. Computer equipment;

[0080] 704, processor;

[0081] 706. Memory;

[0082] 708, driving mechanism;

[0083] 710, input / output interface;

[0084] 712. Input devices;

[0085] 714. Output devices;

[0086] 716. Presentation equipment;

[0087] 718. Graphical user interface;

[0088] 720, network interface;

[0089] 722. Communication link;

[0090] 724. Communication bus. DETAILED DESCRIPTION

[0091] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in some embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on some embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0092] It should be noted that the terms "first", "second", etc. in the specification and claims of this article and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of this article described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0093] It should be noted that the acquisition, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of relevant laws and regulations.

[0094] like Figure 1 The diagram shows a schematic diagram of an implementation system of a shale reservoir simulation development method considering well-to-well infilling and three-dimensional mining in an embodiment of the present invention, which may include: a terminal 101 and a server 102, wherein the terminal 101 and the server 102 communicate with each other through a network, and the network may include a local area network (LAN), a wide area network (WAN), the Internet, or a combination thereof, and is connected to a website, a user device (such as a computing device), and a back-end system. A staff member may send a shale reservoir well-to-well simulation development request to the server 102 through the terminal 101, and after receiving the shale reservoir well-to-well simulation development request, the server 102 calls multiple sets of simulation development parameters of the target shale reservoir in the database for calculation and processing, obtains a processing result, and sends the processing result to the terminal 101, so that the staff member processes the business according to the processing result.

[0095] In the embodiments of this specification, the server 102 can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDN, Content Delivery Network), and big data and artificial intelligence platforms.

[0096] In an optional embodiment, the terminal 101 may include but is not limited to electronic devices such as self-service terminal devices, desktop computers, tablet computers, laptop computers, smart wearable devices, etc. Optionally, the operating system running on the electronic device may include but is not limited to Android system, IOS system, Linux, Windows, etc. Of course, the terminal 101 is not limited to the above-mentioned electronic devices with a certain entity, and it can also be software running in the above-mentioned electronic devices.

[0097] In addition, it should be noted that Figure 1 What is shown is only an application environment provided by the present disclosure. In actual application, multiple terminals 101 may be included, and this specification does not limit this.

[0098] Figure 2It is a flowchart of a shale reservoir simulation development method considering well-to-well infilling and three-dimensional mining provided by an embodiment of the present invention. This specification provides method operation steps as described in the embodiment or flowchart, but may include more or fewer operation steps based on conventional or non-creative labor. The order of steps listed in the embodiment is only one way of executing the steps among many orders, and does not represent the only order of execution. When the actual system or device product is executed, it can be executed in the order or in parallel according to the method shown in the embodiment or the accompanying drawings. Specifically, Figure 2 As shown, applied to the above-mentioned server side, the method may include:

[0099] S201: receiving multiple sets of simulation development parameters of a target shale reservoir;

[0100] S202: determining a first target well, a second target well, and a third target well in a sweet spot of a target shale reservoir according to current simulated development parameters; wherein the second target well and the third target well are staggered between the first target well, the number of the second target well and the third target well is no more than half of the number of the first target well, and the second target well and the third target well are staggered with each other;

[0101] S203: Performing fracturing production on the first target well to obtain first simulated development engineering data;

[0102] S204: determining whether to perform infill mining and / or three-dimensional mining according to the first simulated development engineering data;

[0103] S205: Performing in-depth mining and / or three-dimensional mining according to the judgment result to obtain target simulation development engineering data;

[0104] S206: Determine the recovery factor corresponding to the current simulation development parameters according to the target simulation development engineering data;

[0105] S207: repeating the steps S202 to S206 to obtain a plurality of recovery factors corresponding to the plurality of groups of simulated development parameters;

[0106] S208: Determine target simulation development parameters of the target shale reservoir using the multiple recovery factors.

[0107] The embodiments of the present specification receive multiple groups of simulated development parameters of a target shale reservoir, and perform simulation for each group of simulated development parameters, determine a first target well, a second target well, and a third target well in a sweet spot of the target shale reservoir according to each group of simulated development parameters, and after completing the fracturing production for the first target well, determine whether it is necessary to further perform intensified production and / or three-dimensional production for the second target well and the third target well according to the first simulated development engineering data of the first target well, thereby realizing multi-directional development of the target shale reservoir, and calculating and analyzing multiple recovery factors corresponding to the multiple groups of simulated development parameters, and using the multiple recovery factors to determine the target simulated development parameters of the target shale reservoir, thereby efficiently and accurately determining the target ideal simulated development parameters of the target shale reservoir, so as to increase the oil and gas production of the shale reservoir.

[0108] It can be understood that, in some embodiments, the current development of shale reservoir oil and gas resources is carried out by arranging a row of horizontal wells in parallel in the target reservoir for exploitation. Through a wellhead platform on the ground, 4 to 10 horizontal wells can be laid in the underground target reservoir area, and the current shale oil and gas development technology is in the exploratory stage. The spacing between the laid horizontal wells is often 150m to 600m. Due to reservoir differences and engineering technology limitations, the natural gas resources around the horizontal wells are easily mobilized and produced, while the resource mobilization in the areas far away from the horizontal wells between the horizontal wells is very uncertain. By comparing the actual production volume with the geological reservoir resource assessment volume, the degree of mobilization between the layers can be clarified to determine whether secondary exploitation is required in the horizontal layer in the later stage.

[0109] Further, in some embodiments, hydraulic fracturing is a necessary measure for shale gas development. The fracturing fluids of different development methods are basically similar, but the scale of fracturing will be adjusted. The larger the scale of fracturing, the larger the controllable range of utilization. Hydraulic fracturing mainly creates fractures in shale storage to reduce the resistance to the seepage and discharge of oil and gas resources. By monitoring parameters such as the height of fractures in fracturing, the vertical utilization range of a single well is determined. The resource volume of small layers is evaluated in combination with geological gas-bearing parameters, and the utilization degree of vertical resources can be clarified. In the later stage, three-dimensional development is adopted to increase the resource volume of other layers in the vertical direction. For example: In shale gas exploitation, specifically, after hydraulic fracturing, the effective oil and gas resource range of a single well is calculated and then combined with geological parameters to obtain the resource volume of a single well (for example, 100 to 180 million cubic meters). According to the simulated production data of the past year, the total production volume is simulated and the long-term production forecast is obtained, which is significantly less than the recovery rate of ordinary resources (25 to 35%). In addition, the horizontal well spacing of the early flat layer exploitation is large (500 to 600m), indicating that well densification can be adopted in the later stage. Similarly, in the vertical direction, whether to adopt a three-dimensional mining method is determined based on hydraulic fracturing crack monitoring and resource extraction ratio.

[0110] Specifically, in some embodiments, considering that it is very costly to conduct multiple drilling and mining tests in actual shale reservoirs to determine the development parameters for secondary development, and that there are large differences in the geological characteristics and reservoir characteristics of different shale reservoirs, it is necessary to build a simulated target shale reservoir through experimental simulation, so as to use preset simulation development parameters to conduct inter-well simulation development of shale reservoirs without considering huge development costs and development difficulties, so as to determine the target simulation development parameters, thereby providing an effective reference for shale reservoir development in real scenarios. First, it is still necessary to carry out flat layer development for the target shale reservoir, that is, to perform fracturing mining on the first target well, and according to the first target well, the target well is fracturable. The simulated development engineering data of the target well is used to determine whether secondary development is needed. In order to improve the oil and gas recovery rate of the target shale reservoir, the secondary development method may be intensified mining and / or three-dimensional mining. However, in some embodiments, although it has been determined that intensified mining and / or three-dimensional mining are needed for the target shale reservoir, the development parameters for intensified mining and / or three-dimensional mining are not determined. Therefore, it is necessary to preset multiple sets of simulated development parameters for repeated simulation experiments to obtain corresponding multiple recovery rates. According to the intrinsic relationship between the multiple sets of simulated development parameters and the corresponding multiple recovery rates, the ideal target simulated development parameters are determined to improve the oil and gas recovery rate and oil and gas recovery output of the shale reservoir.

[0111] Furthermore, in some embodiments, the original state corresponding to the sweet spot area of ​​the target shale reservoir is saturated methane gas; each target well includes a vertical well and a corresponding horizontal well; the vertical well and the horizontal well of each target well are distributed in a linear array in the horizontal and vertical directions, respectively.

[0112] Furthermore, in some embodiments, the first target well is subjected to hydraulic fracturing production, including: sequentially performing hydraulic fracturing treatment, well shut-in treatment, and well opening and flowback treatment on the first target well.

[0113] Further, in some embodiments, the first simulated development engineering data includes at least one or more of hydraulic fracturing time, well shut-in time, well opening and flowback time, fluid flow rate, fluid flow rate, wellhead pressure, sand concentration, fracture height monitoring data, fracture distribution morphology monitoring data, and regional resistivity monitoring data.

[0114] It can be understood that, in some embodiments, the sweet spot area of ​​the target shale reservoir refers to the best shale gas production area. In order to highlight the typicality of the target shale reservoir model and facilitate the subsequent calculation of the recovery rate, the original state corresponding to the sweet spot area is set to saturated methane gas. Each of the first target well, the second target well and the third target well includes two components, namely a vertical well and a horizontal well. The depth of the vertical well can be the same or different, and needs to be determined according to the gas storage conditions and formation conditions of the target shale reservoir. The horizontal well of the first target well is usually deployed in the formation with the largest gas storage capacity, so as to maximize the production while reducing the production cost. The vertical wells are distributed in a linear array when viewed from a bird's-eye view on the horizontal section, and the horizontal wells are distributed in a linear array in the vertical section. It should be noted that the linear array distribution is not absolutely regular and ideal. In the process of sequentially performing hydraulic fracturing treatment, well shut-in treatment and well opening and flowback treatment on the first target well, the corresponding first simulated development engineering data is monitored in real time. In some embodiments, the first simulated development engineering data includes at least one or more of fracturing construction data and post-fracturing dynamic monitoring data. Specifically, it includes at least one or more of hydraulic fracturing time, well shut-in time, well opening and flowback time, fluid flow rate, fluid flow rate, wellhead pressure, sand concentration, fracture height monitoring data, fracture distribution morphology monitoring data and regional resistivity monitoring data. Any type of data in the first simulated development engineering data may affect the final shale reservoir production. It should be noted that the first simulated development engineering data obtained by monitoring may also include other fracturing construction data and post-fracturing dynamic monitoring data, which is not limited in this article.

[0115] Refer to the attached Figure 3 In some embodiments, judging whether to perform encrypted mining and / or stereo mining according to the first simulated development engineering data includes:

[0116] S301: Determine a simulated production of a first target well according to the first simulated development engineering data;

[0117] S302: predicting the maximum production of a single well using the simulated production;

[0118] S303: comparing the maximum production of the single well and the gas content of the target shale reservoir;

[0119] S304: If the comparison result is within the first interval, then performing non-densified mining or three-dimensional mining;

[0120] S305: If the comparison result is within the second interval, encrypted mining is performed;

[0121] S306: If the comparison result is within the third interval, three-dimensional mining is performed;

[0122] S307: If the comparison result is within the fourth interval, perform intensified mining and three-dimensional mining.

[0123] It can be understood that, in some embodiments, after obtaining the first simulated development engineering data, a preset regression fitting is used to perform regression fitting on it, so as to obtain the simulated production of the first target well. According to the simulated production, the production data of the future time period can be predicted, so as to obtain the production information of the first target well, and the maximum production of a single well in the flat layer mining stage is predicted. The ratio of the maximum production of a single well and the gas content of the target shale reservoir is obtained by comparison (i.e., the comparison result). According to the size of the ratio, it can be judged whether subsequent intensified mining and / or three-dimensional mining is required. Specifically, when the ratio is large and is within the first interval, it means that the current mining situation is ideal, and the target shale reservoir can be developed without secondary development, and a better development effect can be achieved. When the ratio is small and is within the fourth interval, it means that the current mining situation is not ideal, and intensified mining and three-dimensional mining are required to ensure the subsequent mining volume as much as possible. When the ratio is neither large nor small, that is, within the second interval or within the third interval, a single secondary development method can be selected. It can be understood that for any value in the interval (denoted as: Number in the Xth interval), Number in the first interval>Number Number in the second interval > Number in the fourth interval, Number in the first interval > Number in the third interval > Number in the fourth interval, the relative size between the value in the second interval and the value in the third interval needs to be preset according to the specific situation of the target shale reservoir and the first simulation development engineering data, and this article does not limit this.

[0124] Further, in some embodiments, the target simulation development engineering data includes second simulation development engineering data and / or third simulation development engineering data;

[0125] In some embodiments, the method of performing in-depth mining and / or stereo mining according to the judgment result to obtain target simulation development engineering data includes:

[0126] If in-depth mining is to be carried out, fracturing mining is carried out on the second target well, and the second simulated development engineering data during the fracturing mining process is monitored in real time;

[0127] If three-dimensional mining is carried out, fracturing mining is carried out on the third target well, and the third simulated development engineering data during the fracturing mining process is monitored in real time;

[0128] If intensified mining and three-dimensional mining are carried out, the second target well and the third target well are subjected to fracturing mining, and the second simulated development engineering data and the third simulated development engineering data during the fracturing mining process are monitored in real time.

[0129] It can be understood that, in some embodiments, the second simulated development engineering data can be obtained by using encrypted mining, and the third simulated development engineering data can be obtained by using stereo mining. According to the target simulated development engineering data, the recovery rate of the current target shale reservoir can be obtained when secondary development is carried out using encrypted mining and / or stereo mining. The data type contained in the target simulated development engineering data can be the same as that of the first simulated development engineering data, or can be different from that of the first simulated development engineering data, and this document does not limit this.

[0130] See attached Figure 4 In some embodiments, determining target simulation development parameters of the target shale reservoir using the multiple recovery factors may include:

[0131] S401: Determine the correlation between the plurality of groups of simulated development parameters and their corresponding recovery factors;

[0132] S402: Determine a recovery factor that meets a preset condition according to the association relationship;

[0133] S403: Taking the simulated development parameters corresponding to the recovery factor that meets the preset conditions as target simulated development parameters.

[0134] It can be understood that, in some embodiments, each set of simulated development parameters at least includes one or more of hydraulic fracturing time, well shut-in time, well opening and backflow time, fluid flow rate, fluid flow rate, wellhead pressure and sand concentration, and the number and relative spatial position information of the first target well, the second target well and the third target well. That is to say, according to each set of simulated development parameters, it is firstly possible to determine how to perform fracturing production on the first target well to obtain the first simulated development engineering data. Secondly, in order to reduce the production cost, the number of the second target wells and the third target wells is not more than half of the number of the first target wells. In order to maximize the production of shale reservoirs, the second target wells and the third target wells are staggered around the sweet spot between the first target wells, and the second target wells and the third target wells are staggered with each other. In some typical embodiments, the second target wells are mainly staggered between the first target wells in the lateral direction (i.e., horizontal direction) around the sweet spot, and the third target wells are mainly staggered around the first target wells. The sweet spots are staggered between the first target wells in the longitudinal direction (i.e., the vertical direction). Therefore, it is necessary to determine the number and relative spatial position information of the first target well, the second target well, and the third target well when the highest production output can be achieved. When determining the correlation between multiple sets of simulation development parameters and their corresponding recovery rates, an unsupervised and / or supervised algorithm can be used to train an association model with simulation development parameters as input and recovery rate as output. The association model essentially represents a functional relationship and can be used to determine the simulation development parameters at the maximum recovery rate, thereby taking the simulation development parameters at the maximum recovery rate as the target simulation development parameters. In some embodiments, in order to obtain more feasible target simulation development parameter data, it is also possible to obtain the simulation development parameters corresponding to the recovery rate that meets the preset conditions, that is, to obtain the simulation development parameters corresponding to the recovery rate that is greater than the preset threshold, so as to determine the target simulation development parameters, thereby guiding the inter-well development of shale reservoirs and improving the development output and recovery rate of shale reservoirs.

[0135] In order to make those skilled in the art more familiar with the content of this article, a typical embodiment is given herein. Figure 5a , Figure 5b , Figure 5c , Figure 5dThe schematic diagram of the equipment connection relationship for inter-well simulation development of shale reservoirs shown in the figure includes a target well unit 501, a flowback control unit 502, a monitoring unit 503 and a central computing unit 504. Specifically, the target well unit 501 includes a first target well subunit 5011 for flat layer mining, a second target well subunit 5012 for in-fill mining and a third target well subunit 5013 for three-dimensional mining. Each target well subunit includes a vertical well and a horizontal well connected to each other. The flowback control unit is connected to the wellhead of the vertical well in each target well subunit. The flowback control unit 502 at least includes a fracturing fluid injection subunit 5021 and a wellhead control subunit 5022. The fracturing fluid injection subunit 5021 is used to perform fracturing mining on the target well unit 501, and the wellhead control subunit 50 22 at least includes a control valve, which is usually arranged at a horizontal well and is used to control the start of fracturing production. The monitoring unit 503 is connected to the target well unit 501, and at least includes an airflow detector 5031, a liquid detector 5032 and a pressure sensor 5033, which are used to monitor the simulated development engineering data. The central computing unit 504 is connected to the backflow control unit 502 and the monitoring unit 503, and is used to control the operation of the backflow control unit 502, and calculate the recovery factor according to the monitoring data fed back by the monitoring unit 503, analyze the intrinsic relationship between the simulated development parameters and the recovery factor to determine the target simulated development parameters, so as to realize real-time monitoring of all target wells in the process of inter-well simulated development of shale reservoirs, reduce costs, and obtain accurate and reliable target simulated development parameters of the target shale reservoir.

[0136] It should be noted that, although the operations of the method of the present invention are described in a specific order in the above embodiments and the accompanying drawings, this does not require or imply that the operations must be performed in the specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0137] Corresponding to the above-mentioned shale reservoir simulation development method considering well infilling and three-dimensional mining, some embodiments of this specification also provide a shale reservoir simulation development device considering well infilling and three-dimensional mining, referring to Figure 6 As shown, in some embodiments, the apparatus may include:

[0138] A receiving module 601 is used to receive multiple groups of simulation development parameters of a target shale reservoir;

[0139] The target well determination module 602 is used to determine a first target well, a second target well and a third target well in the sweet spot of the target shale reservoir according to the current simulation development parameters; wherein the second target well and the third target well are staggered between the first target well, the number of the second target well and the third target well is no more than half of the number of the first target well, and the second target well and the third target well are staggered with each other;

[0140] A first fracturing module 603, used to perform fracturing production on the first target well to obtain first simulated development engineering data;

[0141] A determination module 604, configured to determine whether to perform in-fill mining and / or stereo mining according to the first simulated development engineering data;

[0142] The second fracturing module 605 is used to perform infill mining and / or three-dimensional mining according to the judgment result to obtain target simulation development engineering data;

[0143] The recovery factor determination module 606 is used to determine the recovery factor corresponding to the current simulation development parameters according to the target simulation development engineering data;

[0144] Iteration module 607, used to repeat the above step of determining the corresponding recovery factor according to the simulated development parameters, to obtain multiple recovery factors corresponding to the multiple sets of simulated development parameters;

[0145] The target simulation development parameter determination module 608 is used to determine the target simulation development parameters of the target shale reservoir using the multiple recovery factors.

[0146] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing this specification, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0147] It should be noted that in the embodiments of this specification, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved are all information and data authorized by the user and fully authorized by all parties.

[0148] The embodiments of this specification also provide a computer device. Figure 7As shown, in some embodiments of the present specification, the computer device 702 may include one or more processors 704, such as one or more central processing units (CPUs) or graphics processing units (GPUs), and each processing unit may implement one or more hardware threads. The computer device 702 may also include any memory 706, which is used to store any kind of information such as code, settings, data, etc. In a specific embodiment, the computer program on the memory 706 and can be run on the processor 704, when the computer program is run by the processor 704, the instructions of the method described in any of the above embodiments may be executed. Non-limiting, for example, the memory 706 may include any one or more combinations of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of the computer device 702. In one case, when the processor 704 executes an associated instruction stored in any memory or a combination of memories, the computer device 702 may perform any operation of the associated instruction. The computer device 702 also includes one or more drive mechanisms 708 for interacting with any storage, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0149] The computer device 702 may also include an input / output interface 710 (I / O) for receiving various inputs (via input device 712) and for providing various outputs (via output device 714). A specific output mechanism may include a presentation device 716 and an associated graphical user interface 718 (GUI). In other embodiments, the input / output interface 710 (I / O), input device 712, and output device 714 may not be included, and the computer device 702 may be used as a computer device in a network. The computer device 702 may also include one or more network interfaces 720 for exchanging data with other devices via one or more communication links 722. One or more communication buses 724 couple the components described above together.

[0150] The communication link 722 may be implemented in any manner, for example, through a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. The communication link 722 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.

[0151] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), computer-readable storage media, and computer program products of some embodiments of the present specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processor to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processor generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0152] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processor to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0153] These computer program instructions can also be loaded onto a computer or other programmable data processor so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0154] In a typical configuration, a computer device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0155] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0156] Computer-readable media include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computer device. As defined in this specification, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0157] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the embodiments of this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0158] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processors connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0159] It should also be understood that in the embodiments of this specification, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0160] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0161] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of this specification. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0162] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A shale reservoir simulation development method considering well infilling and three-dimensional mining, It is characterized in that The method comprises: receiving multiple sets of simulated development parameters for a target shale reservoir; According to the current simulation development parameters, a first target well, a second target well and a third target well are determined in the sweet spot of the target shale reservoir; wherein the second target well and the third target well are staggered between the first target well, the number of the second target well and the third target well is no more than half of the number of the first target well, and the second target well and the third target well are staggered with each other; Performing fracturing production on the first target well to obtain first simulated development engineering data; Determining whether to perform infill mining and / or stereo mining according to the first simulated development engineering data; Carry out in-depth mining and / or three-dimensional mining according to the judgment results to obtain target simulation development engineering data; Determining the recovery factor corresponding to the current simulation development parameters according to the target simulation development engineering data; Repeat the above step of determining the corresponding recovery factor according to the simulated development parameters to obtain multiple recovery factors corresponding to the multiple sets of simulated development parameters; Target simulation development parameters of the target shale reservoir are determined using the multiple recovery factors.

2. The method according to claim 1, It is characterized in that The original state corresponding to the sweet spot area of ​​the target shale reservoir is saturated methane gas; each target well includes a vertical well and a corresponding horizontal well; the vertical well and the horizontal well of each target well are distributed in a linear array in the horizontal and vertical directions respectively.

3. The method according to claim 1, It is characterized in that The first target well is subjected to hydraulic fracturing production, including: sequentially performing hydraulic fracturing treatment, well shut-in treatment and well opening and flowback treatment on the first target well.

4. The method according to claim 3, It is characterized in that The first simulated development engineering data includes at least one or more of hydraulic fracturing time, well shut-in time, well opening and flowback time, fluid flow, fluid flow rate, wellhead pressure, sand concentration, fracture height monitoring data, fracture distribution morphology monitoring data, and regional resistivity monitoring data.

5. The method according to claim 1, It is characterized in that Determining whether to perform in-fill mining and / or stereo mining according to the first simulated development engineering data includes: Determining a simulated production rate of a first target well according to the first simulated development engineering data; Predicting the maximum production of a single well using the simulated production; comparing the maximum production of the single well and the gas content of the target shale reservoir; If the comparison result is within the first interval, non-densified mining or three-dimensional mining is performed; If the comparison result is within the second interval, encrypted mining is performed; If the comparison result is within the third interval, three-dimensional mining is carried out; If the comparison result is within the fourth interval, encrypted mining and three-dimensional mining are performed.

6. The method according to claim 1, It is characterized in that The target simulation development engineering data includes second simulation development engineering data and / or third simulation development engineering data; The method of performing in-depth mining and / or three-dimensional mining according to the judgment result to obtain target simulation development engineering data includes: If in-depth mining is to be carried out, fracturing mining is carried out on the second target well, and the second simulated development engineering data during the fracturing mining process is monitored in real time; If three-dimensional mining is carried out, fracturing mining is carried out on the third target well, and the third simulated development engineering data during the fracturing mining process is monitored in real time; If intensified mining and three-dimensional mining are carried out, the second target well and the third target well are subjected to fracturing mining, and the second simulated development engineering data and the third simulated development engineering data during the fracturing mining process are monitored in real time.

7. The method according to claim 1, It is characterized in that Each set of simulated development parameters includes at least one or more of hydraulic fracturing time, well shut-in time, well opening and flowback time, fluid flow rate, fluid flow rate, wellhead pressure and sand concentration, and the number and relative spatial position information of the first target well, the second target well and the third target well.

8. The method according to claim 1, It is characterized in that Determining target simulation development parameters of the target shale reservoir using the multiple recovery factors includes: Determining the correlation between the plurality of groups of simulated development parameters and their corresponding recovery factors; Determine the recovery factor that meets the preset conditions according to the association relationship; The simulated development parameters corresponding to the recovery factor that meets the preset conditions are used as target simulated development parameters.

9. A shale reservoir simulation development device considering well infill and three-dimensional mining, It is characterized in that The device comprises: A receiving module, used for receiving multiple groups of simulation development parameters of the target shale reservoir; A target well determination module, used for determining a first target well, a second target well and a third target well in a sweet spot of a target shale reservoir according to current simulated development parameters; wherein the second target well and the third target well are staggered between the first target well, the number of the second target well and the third target well is no more than half of the number of the first target well, and the second target well and the third target well are staggered with each other; A first fracturing module, used to perform fracturing production on the first target well to obtain first simulated development engineering data; A judgment module, used for judging whether to perform in-depth mining and / or stereo mining according to the first simulated development engineering data; The second fracturing module is used to perform intensified mining and / or three-dimensional mining according to the judgment result to obtain target simulation development engineering data; A recovery factor determination module, used to determine the recovery factor corresponding to the current simulation development parameters according to the target simulation development engineering data; An iteration module, used to repeat the above step of determining the corresponding recovery factor according to the simulated development parameters, to obtain multiple recovery factors corresponding to the multiple sets of simulated development parameters; The target simulation development parameter determination module is used to determine the target simulation development parameters of the target shale reservoir using the multiple recovery factors.

10. A computer device comprising a memory, a processor, and a computer program stored on the memory, It is characterized in that When the computer program is executed by the processor, the computer program executes the instructions of the method according to any one of claims 1 to 8.

11. A computer storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor of a computer device, the computer program executes the instructions of the method according to any one of claims 1 to 8.

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