Method and device for determining daily fluid production capacity of target well and electronic equipment

Abstract

The invention discloses a method and device for determining the daily fluid production capacity of a target well and electronic equipment. The method comprises the following steps: receiving a daily fluid production determination request; in response to the daily fluid production determination request, determining crack parameter items corresponding to the plurality of predetermined well areas; actual crack parameter values corresponding to the crack parameter items under the historical daily fluid production capacity are obtained; determining a target relation curve corresponding to the crack parameter item according to an actual crack parameter value corresponding to the crack parameter item under the historical daily fluid production; and according to the target relation curve, the target daily fluid production capacity corresponding to the target well is determined. The technical problem that in the related technology, when the determined target daily fluid production amount is used for exploiting the target well, adverse effects can be caused to the target well is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil field production, and in particular to a method, a device and an electronic device for determining the daily liquid production of a target well. Background Art

[0002] With the exhaustion of conventional oilfields, the goal of oil production has gradually focused on the development of unconventional oilfields (objects). In recent years, as the reservoir properties of the main object of Changqing Oilfield development have become increasingly poor (permeability is mainly below 0.5mD), the development scale of horizontal wells has increased year by year. The design of the initial daily liquid production of horizontal wells directly affects the stable production effect of horizontal wells in the later period. The higher the initial daily liquid production, the greater the liquid production intensity, the faster the rock medium deforms, causing the fractures to close, further affecting the seepage capacity of the well. Therefore, it is necessary to find a method to optimize the reasonable daily liquid production of horizontal wells in the initial stage of fracturing low permeability reservoirs to guide the development of dense oil reservoirs, effectively mobilize the remaining reserves, and improve the development effect.

[0003] However, when the method provided in the related art is used to produce the target well using the determined target daily liquid production, the target well may be adversely affected.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method, device and electronic device for determining the daily liquid production of a target well, so as to at least solve the technical problem in the related art that when the target well is mined using the determined target daily liquid production, the target well may be adversely affected.

[0006] According to one aspect of an embodiment of the present invention, a method for determining the daily liquid production of a target well is provided, comprising: receiving a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production for exploiting the target well, the target well includes multiple predetermined well areas, and the daily liquid production determination request carries the historical daily liquid production of the target well; in response to the daily liquid production determination request, determining fracture parameter items corresponding to the multiple predetermined well areas; obtaining actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production; determining a target relationship curve corresponding to the fracture parameter item based on the actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production, wherein the target relationship curve is a curve representing the corresponding relationship between daily liquid production and fracture parameter values ​​under the fracture parameter items; determining the target daily liquid production corresponding to the target well based on the target relationship curve.

[0007] Optionally, determining the target daily liquid production corresponding to the target well based on the target relationship curve includes: dividing the target relationship curve to obtain a first curve and a second curve, wherein the difference between a change index of the first curve and a change index of the second curve is greater than a predetermined threshold; determining the target daily liquid production corresponding to the target well based on the first curve and the second curve.

[0008] Optionally, determining the target daily liquid production corresponding to the target well based on the first curve and the second curve includes: determining the intersection of the tangent corresponding to the first curve and the tangent corresponding to the second curve; and determining the daily liquid production corresponding to the intersection as the target daily liquid production.

[0009] Optionally, determining the target daily liquid production corresponding to the target well based on the target relationship curve includes: when there are multiple fracture parameter items and multiple target relationship curves, determining the predicted sub-daily liquid production corresponding to the multiple target relationship curves, and the weight values ​​corresponding to the multiple fracture parameter items; determining the target daily liquid production based on the predicted sub-daily liquid production corresponding to the multiple target relationship curves, and the weight values ​​corresponding to the multiple fracture parameter items.

[0010] Optionally, determining a target relationship curve corresponding to the fracture parameter item based on an actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production comprises: determining a target type of the target well; retrieving a predetermined relationship curve corresponding to the target type, wherein the predetermined relationship curve is a curve representing a corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item for a well of the target type; and adjusting the predetermined relationship curve based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production to obtain the target relationship curve.

[0011] Optionally, dividing the target relationship curve to obtain the first curve and the second curve includes: determining a predetermined interval; selecting a plurality of target points in the target relationship curve according to the predetermined interval; determining slopes corresponding to the plurality of target points respectively; and dividing the target relationship curve according to the slopes corresponding to the plurality of target points respectively to obtain the first curve and the second curve.

[0012] Optionally, obtaining the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production includes: when the historical daily fluid production is the historical daily fluid production of multiple days, obtaining the actual fracture parameter values ​​corresponding to the fracture parameter item respectively under the historical daily fluid production of the multiple days.

[0013] According to one aspect of an embodiment of the present invention, a device for determining daily liquid production of a target well is provided, comprising: a receiving module, configured to receive a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production of the target well, the target well comprising a plurality of predetermined well areas, and the daily liquid production determination request carries the historical daily liquid production of the target well; a first determination module, configured to determine, in response to the daily liquid production determination request, fracture parameter items corresponding to the plurality of predetermined well areas; an acquisition module, configured to acquire actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production; a second determination module, configured to determine a target relationship curve corresponding to the fracture parameter item based on the actual fracture parameter values ​​corresponding to the fracture parameter item under the historical daily liquid production, wherein the target relationship curve is a curve representing the corresponding relationship between daily liquid production and fracture parameter values ​​under the fracture parameter items; and a third determination module, configured to determine the target daily liquid production corresponding to the target well based on the target relationship curve.

[0014] According to one aspect of an embodiment of the present invention, there is provided an electronic device, comprising: a processor; and a memory for storing requests executable by the processor; wherein the processor is configured to execute the requests to implement a method for determining daily liquid production of a target well as described in any one of the above.

[0015] According to one aspect of an embodiment of the present invention, a computer-readable storage medium is provided, comprising: when a request in the computer-readable storage medium is executed by a processor of an electronic device, the electronic device is enabled to execute a method for determining daily liquid production of a target well as described in any one of the above.

[0016] In an embodiment of the present invention, a daily liquid production determination request is received, wherein the daily liquid production determination request is used to determine the daily liquid production of a target well, the target well includes multiple predetermined well areas, and the daily liquid production determination request carries the historical daily liquid production of the target well. In response to the daily liquid production determination request, the fracture parameter items corresponding to the multiple predetermined well areas are determined, and the actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production are obtained. Based on the actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production, a target relationship curve corresponding to the fracture parameter items is determined, wherein the target relationship curve is a curve representing the corresponding relationship between the daily liquid production and the fracture parameter values ​​under the fracture parameter items. The purpose of determining the target daily liquid production corresponding to the target well based on the target relationship curve is achieved. Since the target relationship curve is determined based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily liquid production, the daily liquid production under different fracture parameter values ​​can be predicted through the determined target relationship curve. To a certain extent, it is helpful to optimize the setting of the fracture parameter value and select the fracture parameter value corresponding to the best fracture parameter item, so as to more accurately evaluate the daily liquid production under different fracture parameter values. By mining with the determined daily liquid production, the adverse effects on the target well can be reduced and the liquid production life of the target well can be ensured, thereby solving the technical problem in the related technology that when the target well is mined with the determined target daily liquid production, the target well will have an adverse effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a flow chart of a method for determining daily liquid production of a target well according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of an ultra-low permeability fractured horizontal well area provided according to an optional embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of average daily liquid production in typical well production data provided according to an optional embodiment of the present invention;

[0021] Figure 4 It is a fitting diagram of the production history (flowing pressure, cumulative liquid production, daily liquid production) of a typical well in different stages provided according to an optional embodiment of the present invention;

[0022] Figure 5 is a scatter plot of typical well fracture parameters as a function of daily fluid production provided in accordance with an optional embodiment of the present invention;

[0023] Figure 64 is a structural block diagram of a device for determining daily fluid production of a target well according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Example 1

[0027] According to an embodiment of the present invention, an embodiment of a method for determining the daily liquid production of a target well is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0028] Figure 1 is a flow chart of a method for determining daily fluid production of a target well according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0029] Step S102, receiving a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production of a target well, the target well includes a plurality of predetermined well areas, and the daily liquid production determination request carries a historical daily liquid production of the target well;

[0030] In step S102 provided in the present application, the daily liquid production determination request may be a request for determining the daily liquid production of the target well, and the request may include a specific identifier of the target well to accurately identify and locate the target well. The predetermined well area may refer to a different area or location associated with the target well, and may have similar geological features or oil production conditions as those included in the target well.

[0031] The above-mentioned historical daily liquid production may include daily liquid production data of the target well in the past period of time, which is not limited here and can be customized according to specific scenarios and applications.

[0032] It should be noted that, for the above steps, a request for determining daily liquid production is received, and the information contained therein, such as the identification of the target well and the historical daily liquid production data of the target well, is extracted. Then, based on the characteristics of the target well and the production requirements, the area where the target well is located is divided into multiple predetermined well areas, and the historical daily liquid production data of the target well is used to determine the daily liquid production of the subsequent production of the target well.

[0033] Step S104, in response to the daily fluid production determination request, determining fracture parameter items corresponding to a plurality of predetermined well regions;

[0034] In step S104 provided in the present application, in response to the request for determining the daily fluid production, the target well area is analyzed. For example, after the horizontal well is subjected to fracturing construction, cracks are generated in the near-wellbore area, and the cracks communicate with each other to form a complex fracture network. Therefore, the model not only considers the main fractures, but also considers the complex fracture network and high permeability area formed after the formation is fracturing. That is, the above-mentioned multiple predetermined well areas can be: hydraulic main fracture area, fracture network transformation area, and effective area.

[0035] The study of fracture parameter items for the above-divided multiple predetermined well areas may include multiple fracture parameter items such as fracture half-length, fracture conductivity, and permeability of the transformed area. The determination of fracture parameter items may be different according to different projects and actual conditions. Therefore, the fracture parameter items are not limited here and can be customized according to specific scenarios and applications.

[0036] It should be noted that determining the fracture parameter items corresponding to multiple predetermined well areas can, to a certain extent, not only make more accurate daily fluid production predictions, but also help identify potential high-yield well areas, thereby improving mining efficiency, and for areas with good fracture parameter characteristics, it can maximize production.

[0037] Step S106, obtaining actual fracture parameter values ​​corresponding to fracture parameter items under historical daily fluid production;

[0038] In step S106 provided in the present application, the above-mentioned actual fracture parameter value may be a fracture parameter value corresponding to the fracture parameter item measured under the historical daily liquid production. By obtaining the actual fracture parameter value, the characteristics and distribution of oil field fractures may be more accurately understood, so as to more accurately determine a more reasonable daily liquid production. To a certain extent, it helps to optimize the mining strategy, including the reasonable selection of fracturing schemes, adjustment of well network layout and oil production technology, so as to maximize production and economic benefits.

[0039] Step S108, determining a target relationship curve corresponding to the fracture parameter item according to the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, wherein the target relationship curve is a curve representing the corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item;

[0040] In step S108 provided in the present application, the target relationship curve may be a curve of the corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item, which may reflect the correlation between the daily fluid production and the fracture parameter.

[0041] It should be noted that, for the above steps, the target relationship curve can be determined based on the actual fracture parameter value corresponding to the fracture parameter item under the historical liquid production. By determining the target relationship curve, the daily liquid production under different fracture parameter values ​​can be predicted. To a certain extent, it helps to optimize the setting of the fracture parameter value and select the fracture parameter value corresponding to the best fracture parameter item, thereby more accurately evaluating the daily liquid production under different fracture parameter values.

[0042] Step S110, determining a target daily fluid production corresponding to the target well according to the target relationship curve.

[0043] In step S110 provided in the present application, for the above steps, the fracture parameter value of the target well can be used as input, and the target daily liquid production corresponding to the corresponding fracture parameter value can be found according to the target relationship curve. This process can obtain the target daily liquid production through a certain calculation method, and the calculation result of the target daily liquid production can be compared and verified with the actual observation data to evaluate the accuracy of the target relationship curve in predicting the daily liquid production of the target well. The target relationship curve can also be adjusted and optimized according to the observation results.

[0044] It should be noted that by determining the target daily liquid production, on the one hand, it can provide a reference value for setting production targets, reasonably arrange production time and process flow, and improve production efficiency and resource utilization. On the other hand, it can evaluate the utilization efficiency of resources, optimize the setting and adjustment of fracture parameters, and ensure the maximum utilization of oilfield resources.

[0045] Through the above steps S102-S110, a daily liquid production determination request is received, wherein the daily liquid production determination request is used to determine the daily liquid production of the target well, the target well includes multiple predetermined well areas, and the daily liquid production determination request carries the historical daily liquid production of the target well. In response to the daily liquid production determination request, the fracture parameter items corresponding to the multiple predetermined well areas are determined, and the actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production are obtained. Based on the actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production, the target relationship curve corresponding to the fracture parameter items is determined, wherein the target relationship curve is a curve representing the corresponding relationship between the daily liquid production and the fracture parameter values ​​under the fracture parameter items. The purpose of determining the target daily liquid production corresponding to the target well based on the target relationship curve is achieved. Since the target relationship curve is determined based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily liquid production, the daily liquid production under different fracture parameter values ​​can be predicted through the determined target relationship curve. To a certain extent, it is helpful to optimize the setting of the fracture parameter value and select the fracture parameter value corresponding to the best fracture parameter item, so as to more accurately evaluate the daily liquid production under different fracture parameter values. By mining with the determined daily liquid production, the adverse effects on the target well can be reduced and the liquid production life of the target well can be ensured, thereby solving the technical problem in the related technology that when the target well is mined with the determined target daily liquid production, the target well will have an adverse effect.

[0046] The above method of this embodiment is further introduced below.

[0047] As an optional embodiment, the target daily liquid production corresponding to the target well is determined based on the target relationship curve, including: dividing the target relationship curve to obtain a first curve and a second curve, wherein the difference between the change index of the first curve and the change index of the second curve is greater than a predetermined threshold; based on the first curve and the second curve, the target daily liquid production corresponding to the target well is determined.

[0048] In this embodiment, the curve can be divided by setting a predetermined threshold value, and the target relationship curve is divided into a first curve and a second curve. Then, the difference between the change index of the first curve and the second curve is calculated. If the difference is greater than the predetermined threshold value, it is considered that the first curve and the second curve have sufficient difference. Based on the difference between the first curve and the second curve, the target daily liquid production corresponding to the target well is determined. According to the shape and trend of the first curve and the shape and trend of the second curve, the specific value of the target daily liquid production can be determined by comprehensive consideration.

[0049] It should be noted that by determining the target daily liquid production through the first curve and the second curve, on the one hand, the influence of changes in different fracture parameter values ​​on the daily liquid production can be reflected by comparing the difference in the change index between the first curve and the second curve. On the other hand, it helps to identify and understand the importance and sensitivity of different fracture parameters, and further optimize the setting and adjustment of fracture parameters, so as to better predict the target production of the target well under different fracture parameter values.

[0050] As an optional embodiment, the target daily liquid production corresponding to the target well is determined based on the first curve and the second curve, including: determining the intersection of the tangent corresponding to the first curve and the tangent corresponding to the second curve; and determining the daily liquid production corresponding to the intersection as the target daily liquid production.

[0051] In this embodiment, based on the first curve and the second curve determined in the above steps, the tangent corresponding to the first curve and the tangent corresponding to the second curve are determined respectively, and the horizontal coordinate of the intersection of the corresponding tangents is determined as the target daily liquid production corresponding to the target well.

[0052] It should be noted that by determining the tangent, the intersection of the tangents and the target daily liquid production, it is possible to accurately find the location of the target well within the range of the curve change, as well as the corresponding target daily liquid production, which helps to optimize production decisions, resource management and output optimization. To a certain extent, it can improve the efficiency and economic benefits of oil field development and achieve more sustainable oil field development and production.

[0053] As an optional embodiment, the target daily liquid production corresponding to the target well is determined based on the target relationship curve, including: when there are multiple fracture parameter items and multiple target relationship curves, determining the predicted sub-daily liquid production corresponding to the multiple target relationship curves, and the weight values ​​corresponding to the multiple fracture parameter items; determining the target daily liquid production based on the predicted sub-daily liquid production corresponding to the multiple target relationship curves, and the weight values ​​corresponding to the multiple fracture parameter items.

[0054] In this embodiment, when there are multiple fracture parameter items and multiple target relationship curves, corresponding predicted sub-daily liquid production can be obtained for different fracture parameter items, and then weight values ​​corresponding to the multiple fracture parameter items can be further determined. These weight values ​​can represent the relative proportion of different fracture parameter items in the predicted sub-daily liquid production, and the target daily liquid production can be determined based on the weight value of each fracture parameter item and the corresponding predicted sub-daily liquid production.

[0055] It should be noted that by determining the weight values ​​corresponding to multiple fracture parameter items, on the one hand, the importance of different fracture parameter items to the target daily liquid production can be quantified, so that the relative contribution of each parameter item to the production can be more clearly understood, so as to make targeted adjustments and optimizations. On the other hand, by changing the weight value to evaluate the impact of different parameter items on the target daily liquid production, it is helpful to understand the relative importance and correlation between different parameter items, and then make more targeted decisions.

[0056] As an optional embodiment, a target relationship curve corresponding to the fracture parameter item is determined based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily liquid production, including: determining the target type of the target well; calling a predetermined relationship curve corresponding to the target type, wherein the predetermined relationship curve is a curve representing the corresponding relationship between the daily liquid production and the fracture parameter value under the fracture parameter item for the well of the target type; adjusting the predetermined relationship curve based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily liquid production to obtain the target relationship curve.

[0057] In this embodiment, in the process of determining the target relationship curve corresponding to the fracture parameter item, it is first necessary to clarify the target type to which the target well belongs, such as different well types, reservoir characteristics or production targets, etc. Then, for the determined target type, a predefined relationship curve is retrieved. The predetermined relationship curve may be a curve representing the corresponding relationship between the daily liquid production and the fracture parameter value for the target well of this type. For a given target type, according to the actual fracture parameter value corresponding to the fracture parameter item under the historical daily liquid production, the predetermined relationship curve is optimized or adjusted by adjusting the parameters or shape in the predetermined relationship curve to obtain a target relationship curve that is more consistent with the actual situation. The specific method of adjusting the predetermined relationship curve is not limited here and can be customized according to the actual scenario and application machine.

[0058] It should be noted that by determining the predetermined relationship curve, the influence of different fracture parameters on the target well fluid production can be clearly reflected, and the correlation between different fracture parameter items can be understood, thereby optimizing the selection and adjustment of the corresponding fracture parameter values. To a certain extent, it can improve the accuracy and basis of production decisions and provide more reliable guidance and optimization direction for oilfield development.

[0059] As an optional embodiment, dividing the target relationship curve to obtain a first curve and a second curve includes: determining a predetermined interval; selecting multiple target points in the target relationship curve according to the predetermined interval; determining the slopes corresponding to the multiple target points respectively; dividing the target relationship curve according to the slopes corresponding to the multiple target points respectively to obtain the first curve and the second curve.

[0060] In this embodiment, the predetermined interval may refer to a time or parameter interval for selecting multiple target points in the target relationship curve. The specific predetermined interval is not limited here and can be customized according to specific scenarios and applications.

[0061] For the above steps, in the target relationship curve, multiple target points can be selected according to a predetermined interval. The target point can be a specific time point on the curve, or a value point of a specific crack parameter. The selection of the target point should be representative to a certain extent to reflect the key characteristics and change trends on the curve. Then, the slope of each target point is calculated, that is, the tangent slope of the target relationship curve at that point. The slope can be obtained by calculating the rate of change of the curve between adjacent points. The slope reflects the rate of change and trend of the target relationship curve at that point. According to the slopes of multiple target points, the target relationship curve can be divided into a first curve and a second curve. The divided first curve and second curve represent the characteristics and change trends of different parts of the target relationship curve.

[0062] It should be noted that selecting multiple target points can provide key data points on the curve, which represent the production levels at different times or fracture parameter values. By selecting representative target points, important changes and trends on the curve can be captured, which helps to understand the impact of different parameter values ​​or time periods on production, and helps to determine the best resource allocation under different parameter values ​​or time periods to achieve maximum production or optimal resource utilization.

[0063] As an optional embodiment, obtaining the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production includes: when the historical daily fluid production is the historical daily fluid production of multiple days, obtaining the actual fracture parameter values ​​corresponding to the fracture parameter item under the historical daily fluid production of multiple days.

[0064] In this embodiment, for the above steps, the historical daily liquid production of multiple days, and the actual fracture parameter values ​​corresponding to the fracture parameter items under the historical daily liquid production of multiple days are obtained, so that the relationship between the fracture parameters and the production can be further determined. By using the actual fracture parameter values ​​corresponding to the historical daily liquid production, on the one hand, not only can the model or algorithm between the fracture parameters and the production be verified and improved, but also the actual data can be compared with the model prediction results, the accuracy of the model can be evaluated, and necessary improvements and calibrations can be made. On the other hand, by analyzing the actual fracture parameter values ​​corresponding to different fracture parameters under the historical daily liquid production of multiple days, the optimal value range of the fracture parameters can be determined, and the fracture parameter combination with higher production can be found, which is helpful to optimize the selection, design and optimization of fracture parameters to maximize the oil field production.

[0065] Based on the above embodiments and optional embodiments, an optional implementation is provided, which is described in detail below.

[0066] In the related technology, when the target daily liquid production is used to produce the target well, there is a technical problem that the target well will be adversely affected. For example, the optimization of the reasonable production system for fractured horizontal wells is mainly divided into two types:

[0067] 1) Numerical simulation method, which relies on numerical simulation method for analysis, but the above optimization process requires the construction of numerical simulation model, which takes a long time to build and simulate, and requires a lot of input information and data. For some ultra-low permeability reservoirs, due to the short overall development time, some information and data are difficult to collect.

[0068] 2) Indoor experiments, which consider the proppant settling model to determine the initial development technology policy of horizontal wells. However, the indoor experimental conditions are difficult to truly reflect the flow characteristics in the formation.

[0069] The above method has a technical problem of causing adverse effects on the target well when the target daily liquid production is used to produce the target well.

[0070] In view of this, a method for determining the daily liquid production of a target well is provided in an optional implementation manner of the present invention, and the optional implementation manner of the present application is described in detail below.

[0071] S1. Receive a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production of a target well, the target well includes a plurality of predetermined well areas, and the daily liquid production determination request carries a historical daily liquid production of the target well;

[0072] It should be noted that the target well may be an ultra-low permeability fractured horizontal well, and the multiple predetermined well areas may be the horizontal wells that have fractures near the wellbore after fracturing, and the fractures communicate with each other to form a complex fracture network, that is, they may be hydraulic main fracture areas, fracture network transformation areas, and effective areas. Figure 2 A schematic diagram of an ultra-low permeability fractured horizontal well region provided for an optional embodiment of the present invention, such as Figure 2 As shown, the hydraulic main fracture area can be the main fracture area formed by hydraulic fracturing, the fracture network transformation area can be the area where the secondary fractures between the hydraulic main fractures are relatively developed, and the effective area can be the area where the fracture network is not formed at the end of the fracturing transformation but still has an improvement effect.

[0073] The historical daily liquid production of the above-mentioned target well may be the production test data of the target well obtained, and the production test data include data in different time periods, including at least one of the following: historical daily liquid production, historical cumulative liquid production, and the corresponding historical average daily liquid production. The geological data of the target well may also be obtained, including bottom hole flowing pressure, well radius, middle depth of the oil layer, oil layer thickness (vertical thickness), formation crude oil viscosity, crude oil volume coefficient, comprehensive compression coefficient, effective porosity, etc.

[0074] It should also be noted that in the above steps, for the segmented production data, the initial time of each segment is the start time t0 of the production test, and the end time of each segment is a certain time t n If the production test time is t0~t, if the corresponding production test data is divided into n+1 segments, that is, the starting point of each segment is the production origin t0 of the well. Table 1 is a statistical table of the segment time of the test well, as shown in Table 1:

[0075] Table 1

[0076] Segment number Each starting time Each end time 1 <![CDATA[t0]]> <![CDATA[t1]]> 2 <![CDATA[t0]]> <![CDATA[t2]]> 3 <![CDATA[t0]]> <![CDATA[t3]]> …… <![CDATA[t0]]> …… n <![CDATA[t0]]> <![CDATA[t n ]]> n+1 <![CDATA[t0]]> <![CDATA[t n+1 ]]>

[0077] From t0 to t1, the average daily liquid production Q1 is considered to be

[0078] From t0 to t2, the average daily liquid production Q2 is considered to be

[0079] t0 to t n Stage, average daily liquid production Q n Consider

[0080] For the above average daily liquid production, q 液 is the daily liquid production, Figure 3 A schematic diagram of the average daily liquid production in typical well production data provided by an optional embodiment of the present invention is shown in FIG. Figure 3 A segmentation schematic diagram is shown, wherein the segmentation schematic diagram is obtained by acquiring and analyzing the geological data and production dynamic data of the well, and segmenting the production dynamic data by time to obtain the corresponding average daily liquid production in different time periods. The following Table 2 is the fitting result of the staged production history, and a corresponding table of segmentation time and average daily liquid production is given in Table 2.

[0081] Table 2

[0082] Segment number Starting time of each segment (h) End time of each segment (h) Average daily liquid production (m3 / d) 1 0 2000 8.69 2 0 4000 10.21 3 0 6000 11.62 4 0 8000 12.40

[0083] S2, in response to a daily liquid production determination request, determining fracture parameter items corresponding to a plurality of predetermined well regions, and actual fracture parameter values ​​corresponding to the fracture parameter items under historical daily liquid production;

[0084] It should be noted that the above-mentioned fracture parameter items corresponding to the predetermined well area include but are not limited to fracture half-length, fracture conductivity, permeability of the transformed area, etc. After the fracture parameter items are determined, the actual fracture parameter values ​​corresponding to the fracture parameter items are further determined.

[0085] S3. Determine a target relationship curve corresponding to the fracture parameter item based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, wherein the target relationship curve is a curve representing the corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item;

[0086] It should be noted that, according to the fracture parameter items under different time periods and different daily fluid production, when the actual fracture parameter value continues to decrease, the law of its change with the daily fluid production is studied, a scatter plot of daily fluid production and fracture-related parameters is drawn, and the corresponding trend line is regressed.

[0087] S4, dividing the target relationship curve to obtain a first curve and a second curve, wherein a difference between a change index of the first curve and a change index of the second curve is greater than a predetermined threshold;

[0088] After obtaining the first curve and the second curve, the tangent corresponding to the first curve and the tangent corresponding to the second curve are determined respectively, and the intersection of the tangent corresponding to the first curve and the tangent corresponding to the second curve is further determined, wherein the corresponding tangents can be obtained by drawing curve tangents from the front and back segments of the trend line respectively.

[0089] S5. Determine the target daily fluid production corresponding to the target well based on the target relationship curve.

[0090] It should be noted that the daily liquid production corresponding to the above-mentioned intersection is determined as the target daily liquid production, that is, when there are multiple fracture parameter items and multiple target relationship curves, the predicted sub-daily liquid production corresponding to the multiple target relationship curves and the weight values ​​corresponding to the multiple fracture parameter items are determined; the target daily liquid production is determined based on the predicted sub-daily liquid production corresponding to the multiple target relationship curves and the weight values ​​corresponding to the multiple fracture parameter items.

[0091] In this process, the well analysis model and the dynamic inversion method can be used to determine the subsequent target daily liquid production. The steps are as follows: the dynamic inversion method can be used in the dynamic data analysis software KAPPA, based on the dimensionless pressure or production solution, geological data and production history data, combined with dimensionless parameters, to determine and preset the actual fracture parameter value, and then calculate the corresponding dimensional pressure solution based on the dimensionless pressure solution, preset unknown parameters, geological data, and production data, so as to obtain the theoretical pressure curve; calculate the corresponding dimensional production solution based on the dimensionless production solution, preset unknown parameters, geological data, and pressure data, so as to obtain the theoretical production curve, and further compare the theoretical and measured pressure or production curves in the same coordinate system, and continuously adjust the parameters until the theoretical and measured curves coincide or the error is minimized. At this time, the preset actual fracture parameter value is the inversion result, so as to obtain the fracture parameter value corresponding to the fracture parameter item in different time periods. The fracture parameter items include but are not limited to the fracture half-length, fracture conductivity, and permeability of the reformed area. Figure 4 The fitting diagram of the production history (flowing pressure, cumulative liquid production, daily liquid production) of a typical well in different stages provided by the optional implementation mode of the present invention, in this step, the geological data obtained above, the historical production data in different time periods, and the bottom hole pressure solution obtained by the model can be used to invert the fracture parameters in different time periods by using the dynamic inversion method, that is, the following can be obtained: Figure 4 The fitting diagram is shown.

[0092] For the above steps, the specific steps for determining the target daily liquid production are: the daily liquid production q1, q2, q3 can be determined according to the intersection of the two tangents. Figure 5 A scatter plot of typical well fracture parameters as a function of daily fluid production provided in an optional embodiment of the present invention, such as Figure 5 As shown in the figure, R 2 represents the correlation coefficient. The initial optimal target daily liquid production is determined based on the average value of q1, q2, and q3. The formula is: Q opt =(q1+q2+q3) / 3, when the average daily liquid production drops to the target daily liquid production Q opt After about 1000 s, the permeability, half-length of fractures and conductivity of fractures in the reformed area decreased steadily. opt When the fracture-related parameters decrease rapidly, the fracture closure is caused, which affects the overall seepage capacity of the well. opt When the well is pumped, it may put pressure on the well's production allocation.

[0093] Through the above optional implementation, at least the following beneficial effects can be achieved:

[0094] (1) Since the actual fracture parameter value corresponds to the fracture parameter item under the historical daily liquid production, that is, by obtaining the actual fracture parameter value, the characteristics and distribution of oil field fractures can be more accurately understood, so as to more accurately determine a more reasonable daily liquid production. To a certain extent, it helps to optimize the mining strategy, including the reasonable selection of fracturing schemes, adjustment of well network layout and oil production technology, and maximize the production and economic benefits.

[0095] (2) Since the target relationship curve is determined based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, that is, the daily fluid production under different fracture parameter values ​​can be predicted through the determined target relationship curve. To a certain extent, it helps to optimize the setting of the fracture parameter value and select the fracture parameter value corresponding to the best fracture parameter item, thereby more accurately evaluating the daily fluid production under different fracture parameter values.

[0096] (3) Since the target daily liquid production is determined based on the target relationship curve, that is, the target daily liquid production can, on the one hand, provide a reference value for setting production targets, reasonably arrange production time and process flow, and improve production efficiency and resource utilization; on the other hand, it can evaluate resource utilization efficiency, optimize the setting and adjustment of fracture parameters, and ensure the maximum utilization of oilfield resources.

[0097] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0098] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of various embodiments of the present invention.

[0099] Example 2

[0100] According to an embodiment of the present invention, there is also provided a device for implementing the above-mentioned method for determining the daily liquid production of a target well. Figure 6is a structural block diagram of a device for determining daily liquid production of a target well according to an embodiment of the present invention. Figure 6 As shown, the device includes: a receiving module 602, a first determining module 604, an acquiring module 606, a second determining module 608 and a third determining module 610. The device is described in detail below.

[0101] A receiving module 602 is used to receive a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production of a target well, the target well includes a plurality of predetermined well areas, and the daily liquid production determination request carries a historical daily liquid production of the target well;

[0102] A first determination module 604, connected to the receiving module 602, is used to determine fracture parameter items corresponding to a plurality of predetermined well regions in response to a daily liquid production determination request;

[0103] An acquisition module 606, connected to the first determination module 604, is used to acquire an actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production;

[0104] A second determination module 608, connected to the acquisition module 606, is used to determine a target relationship curve corresponding to the fracture parameter item according to the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, wherein the target relationship curve is a curve representing the corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item;

[0105] The third determination module 610 is connected to the second determination module 608 and is used to determine the target daily liquid production corresponding to the target well according to the target relationship curve.

[0106] It should be noted here that the above-mentioned receiving module 602, the first determination module 604, the acquisition module 606, the second determination module 608 and the third determination module 610 correspond to steps S102 to S110 in the method for determining the daily liquid production of the target well, and the examples and application scenarios implemented by the multiple modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned Example 1.

[0107] Example 3

[0108] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising: a processor; and a memory for storing instructions executable by the processor, wherein the processor is configured to execute instructions to implement any of the above methods for determining the daily liquid production of a target well.

[0109] Example 4

[0110] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. When instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute any of the above methods for determining the daily liquid production of a target well.

[0111] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0112] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0114] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0115] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0116] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0117] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining the daily liquid production of a target well, characterized in that: include: Receiving a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production of a target well, the target well includes a plurality of predetermined well areas, and the daily liquid production determination request carries a historical daily liquid production of the target well; In response to the daily fluid production determination request, determining fracture parameter items corresponding to the plurality of predetermined well regions; Obtaining an actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production; Determine a target relationship curve corresponding to the fracture parameter item according to the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, wherein the target relationship curve is a curve representing the corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item; According to the target relationship curve, a target daily fluid production corresponding to the target well is determined.

2. The method according to claim 1, characterized in that Determining the target daily fluid production corresponding to the target well according to the target relationship curve includes: dividing the target relationship curve to obtain a first curve and a second curve, wherein a difference between a change index of the first curve and a change index of the second curve is greater than a predetermined threshold; A target daily liquid production corresponding to the target well is determined based on the first curve and the second curve.

3. The method according to claim 2, characterized in that Determining the target daily liquid production corresponding to the target well according to the first curve and the second curve includes: determining an intersection point of a tangent line corresponding to the first curve and a tangent line corresponding to the second curve; The daily fluid production corresponding to the intersection is determined as the target daily fluid production.

4. The method according to claim 1, characterized in that: Determining the target daily fluid production corresponding to the target well according to the target relationship curve includes: In the case where there are multiple fracture parameter items and multiple target relationship curves, determining predicted sub-daily fluid productions corresponding to the multiple target relationship curves, and weight values ​​corresponding to the multiple fracture parameter items; The target daily liquid production is determined according to the predicted sub-daily liquid productions corresponding to the multiple target relationship curves, and the weight values ​​corresponding to the multiple fracture parameter items.

5. The method according to claim 1, characterized in that The determining of the target relationship curve corresponding to the fracture parameter item based on the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production includes: determining a target type of the target well; Retrieving a predetermined relationship curve corresponding to the target type, wherein the predetermined relationship curve is a curve representing the corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item for the well of the target type; According to the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, the predetermined relationship curve is adjusted to obtain the target relationship curve.

6. The method according to claim 2, characterized in that The dividing the target relationship curve to obtain a first curve and a second curve includes: determining a predetermined interval; In the target relationship curve, selecting a plurality of target points according to the predetermined interval; Determine the slopes corresponding to the multiple target points respectively; The target relationship curve is divided according to the slopes respectively corresponding to the multiple target points to obtain the first curve and the second curve.

7. The method according to any one of claims 1 to 6, characterized in that: The obtaining of the actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production includes: In a case where the historical daily fluid production is the historical daily fluid production of multiple days, actual fracture parameter values ​​corresponding to the fracture parameter items respectively under the historical daily fluid production of multiple days are obtained.

8. A device for determining the daily liquid production of a target well, characterized in that: include: A receiving module, configured to receive a daily liquid production determination request, wherein the daily liquid production determination request is used to determine the daily liquid production of a target well, the target well includes a plurality of predetermined well areas, and the daily liquid production determination request carries a historical daily liquid production of the target well; A first determination module, configured to determine fracture parameter items corresponding to the plurality of predetermined well regions in response to the daily liquid production determination request; An acquisition module, used for acquiring an actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production; A second determination module is used to determine a target relationship curve corresponding to the fracture parameter item according to an actual fracture parameter value corresponding to the fracture parameter item under the historical daily fluid production, wherein the target relationship curve is a curve representing a corresponding relationship between the daily fluid production and the fracture parameter value under the fracture parameter item; The third determination module is used to determine the target daily liquid production corresponding to the target well according to the target relationship curve.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method for determining the daily liquid production of the target well as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method for determining the daily liquid production of a target well as described in any one of claims 1 to 7.

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