CN114592858A

CN114592858A - Conversion time determination method and device for oil field two-three combined development

Info

Publication number: CN114592858A
Application number: CN202011437261.1A
Authority: CN
Inventors: 张家良; 赵平起; 蔡明俊; 熊英; 赵明; 罗波; 李晓良; 张津; 喻州; 张祝新
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-06-07

Abstract

The application discloses a method and a device for determining conversion opportunity of oil field two-three combined development, and belongs to the technical field of oil field development. The method comprises the following steps: transferring oil reservoir numerical simulation software to simulate the oil yield, the water content and the recovery ratio of a target oil field in a two-three combination mode at different conversion occasions; acquiring at least one evaluation index in the two-three combined mode at different conversion occasions based on the oil production, the water content and the recovery ratio in the two-three combined mode at different conversion occasions; drawing a conversion opportunity determination model graph based on at least one evaluation index in a two-three combination mode of different conversion opportunities, wherein the conversion opportunity determination model graph comprises a relation curve of each evaluation index and the conversion opportunity; and displaying the conversion timing determination model diagram. The method and the device can determine the appropriate conversion time for converting secondary development into tertiary oil recovery, thereby improving the development effect of the oil field.

Description

Conversion time determination method and device for oil field two-three combined development

Technical Field

The application relates to the technical field of oilfield development, in particular to a method and a device for determining conversion time of two-three combined development of an oilfield.

Background

The 'two-three combined' technology is a technology for further greatly improving the ultimate recovery rate of the old oil field by using a secondary development to perfect a well pattern of a layer system and a machine-selection-to-tertiary oil recovery technology when the old oil field adopts the traditional primary development to basically reach the limit state. The secondary development layer system well pattern recombination gives consideration to the requirement of subsequent tertiary oil recovery, so that the effects of improving the spread coefficient of the secondary development layer system well pattern and improving the oil displacement efficiency of the tertiary oil recovery are exerted, and the synergistic effect of the secondary development layer system well pattern and the tertiary oil recovery is fully exerted, so that the improved recovery ratio is larger than the sum of the improved recovery ratio of the single secondary development and the single tertiary oil recovery, the effect of 1+1>2 is achieved, and a space is reserved for greatly improving the final recovery ratio and the economic benefit of an old oil field.

The secondary development layer system well pattern can be used for tertiary oil recovery immediately after being recombined, or can be used for transferring tertiary oil recovery after water drive for a period of time, and when different conversion opportunities (namely transferring tertiary oil recovery from secondary development to different water contents) are adopted, different oil field development effects can be brought, so that different technical values, social values and economic values are brought, therefore, a method for determining the conversion opportunities is urgently needed, a proper conversion opportunity for transferring secondary development to tertiary oil recovery is determined, and the oil field development effect is improved.

Disclosure of Invention

The embodiment of the application provides a method and a device for determining the conversion time of oil field two-three combined development, which can determine the appropriate conversion time for switching from secondary development to tertiary oil recovery, thereby improving the oil field development effect. The technical scheme is as follows:

in one aspect, a method for determining conversion time of oil field two-three combined development is provided, which comprises the following steps:

transferring oil reservoir numerical simulation software to simulate the oil yield, the water content and the recovery ratio of a target oil field in a two-three combination mode at different conversion occasions, wherein the two-three combination mode refers to an oil field development mode of firstly carrying out secondary development and then transferring to tertiary oil recovery;

acquiring at least one evaluation index under the two-three combined mode at different conversion occasions based on the oil production, the water content and the recovery ratio under the two-three combined mode at different conversion occasions, wherein the evaluation index is used for evaluating the development effect of the two-three combined mode;

drawing a conversion opportunity determination model graph based on at least one evaluation index in a two-three combination mode of different conversion opportunities, wherein the conversion opportunity determination model graph comprises a relation curve of each evaluation index and the conversion opportunity;

and displaying the conversion timing determination model diagram.

In one possible implementation, the displaying the conversion timing determination model map includes:

and displaying the conversion time corresponding to the target constraint condition in the conversion time determination model diagram based on the target constraint condition corresponding to the at least one evaluation index.

In one possible implementation, the at least one evaluation index includes a recovery factor increase, which is an increased recovery factor of the two-three combination compared to the basic water drive, a precipitation amount, which is a decreased water production of the two-three combination compared to the basic water drive, and an internal yield based on the oil production, the water cut, and the recovery factor in the two-three combination;

before obtaining at least one evaluation index in the two-three combined mode at different conversion occasions based on the oil production, the water content and the recovery ratio in the two-three combined mode at different conversion occasions, the method further comprises:

and calling numerical reservoir simulation software to respectively simulate the water yield and the recovery ratio of the target oil field under the basic water drive.

In one possible implementation manner, the obtaining at least one evaluation index in the two-three combined manner at different conversion occasions based on the oil production, the water content and the recovery factor in the two-three combined manner at different conversion occasions includes:

acquiring the recovery factor amplification of the target oil field in the two-three combined mode at different conversion occasions based on the recovery factor of the target oil field in the two-three combined mode at different conversion occasions;

acquiring the precipitation under the two-three combination mode at different conversion occasions based on the water yield of the target oil field under the two-three combination mode at the basic water drive and at different conversion occasions;

and obtaining the internal yield of the target oil field in the two-three combined mode at different conversion occasions based on the oil production, the water content and the recovery ratio of the target oil field in the two-three combined mode at different conversion occasions, wherein the internal yield is obtained by a target evaluation method.

In one possible implementation, the at least one evaluation indicator further includes a well pattern completion rate, and the method further includes:

and calling the numerical reservoir simulation software to simulate the well pattern perfectness of the target oil field in a two-three combination mode at different conversion occasions.

In one possible implementation, the method further comprises:

calling the numerical reservoir simulation software to simulate the prediction data of the change of the oil production amount of the target oil field along with the production time in a mode of transferring to tertiary oil recovery when basic water drive, independent secondary development, two-three combined synchronous implementation and secondary development reach different water contents, wherein the two-three combined synchronous implementation refers to immediately transferring to tertiary oil recovery after the secondary development;

drawing an oil yield prediction model graph based on the prediction data of the oil yield changing along with the production time, wherein the oil yield prediction model graph comprises a relation curve of the oil yield and the production time under each development mode;

and displaying the oil yield prediction model diagram.

In one aspect, a device for determining a conversion time for oil field two-three combined development is provided, which comprises:

the simulation module is used for calling oil reservoir numerical simulation software and simulating the oil yield, the water content and the recovery ratio of a target oil field in a two-three combined mode at different conversion occasions, wherein the two-three combined mode refers to an oil field development mode of firstly carrying out secondary development and then transferring to tertiary oil recovery;

the acquisition module is used for acquiring at least one evaluation index in the two-three combined mode at different conversion occasions based on the oil production, the water content and the recovery ratio in the two-three combined mode at different conversion occasions, and the evaluation index is used for evaluating the development effect of the two-three combined mode;

the drawing module is used for drawing a conversion opportunity determination model graph based on at least one evaluation index in a two-three combination mode of different conversion opportunities, and the conversion opportunity determination model graph comprises a relation curve of each evaluation index and the conversion opportunity;

and the display module is used for displaying the conversion opportunity determination model diagram.

In a possible implementation manner, the display module is configured to display, in the conversion timing determination model map, a conversion timing corresponding to a target constraint condition based on the target constraint condition corresponding to the at least one evaluation index.

the simulation module is further used for simulating the oil production, the water content and the recovery ratio under a two-three combination mode based on different conversion occasions:

In one possible implementation, the obtaining module is configured to:

In one possible implementation, the at least one evaluation indicator further includes a well pattern completion rate, and the simulation module is further configured to:

In one possible implementation manner, the simulation module is further configured to invoke the numerical reservoir simulation software to simulate the predicted data of the change of the oil yield of the target oil field along with the production time in a basic water drive mode, a single secondary development mode, a two-three combined synchronous implementation mode and a tertiary oil recovery mode when the secondary development mode is changed to different water contents, wherein the two-three combined synchronous implementation mode refers to the immediate tertiary oil recovery mode after the secondary development mode;

the drawing module is also used for drawing an oil production prediction model diagram based on the prediction data of the oil production along with the change of the production time, and the oil production prediction model diagram comprises a relation curve of the oil production and the production time under each development mode;

the display module is also used for displaying the oil production prediction model diagram.

In one aspect, a computer device is provided, which includes one or more processors and one or more memories, and at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the method for determining conversion timing in development of oil field two-three combination.

In one aspect, a computer-readable storage medium is provided, where at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the method for determining conversion timing for oil field two-three combined development.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

aiming at the two-three combined development process of firstly carrying out secondary development and then carrying out tertiary oil recovery on an oil field, a method of numerical reservoir simulation is applied to predict data such as oil yield, water content and recovery ratio when the oil field adopts different conversion occasions, development effect evaluation indexes corresponding to different conversion occasions can be obtained based on the data, so that relationship curves of the evaluation indexes and the conversion occasions are drawn into the same graph to obtain a model graph for determining the conversion occasions, the development effect evaluation indexes of different conversion occasions are comprehensively considered by applying the model graph, the proper conversion occasion from the secondary development to the tertiary oil recovery can be determined, and the development effect of the oil field is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of a method for determining a transition time of oil field two-three combined development according to an embodiment of the present application;

fig. 2 is a flowchart of a method for determining a transition time of oil field two-three combined development according to an embodiment of the present application;

fig. 3 is a schematic diagram of a conversion timing determination model provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of an oil production prediction model provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a conversion timing determining device for oil field two-three combined development according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, some terms referred to in the embodiments of the present application are explained below:

reservoir numerical simulation software: the development process of the oil field is simulated by computer modeling. The change of production indexes in the oil field development process can be predicted by applying an oil reservoir numerical simulation method, wherein the production indexes comprise oil production, water content and recovery ratio, and can also comprise the extraction degree, the well pattern perfection ratio and the like.

Basic water drive: the method is an oil field development mode of artificially supplementing water injection and displacement on the basis of the current injection and production well pattern.

Secondary development: the method is characterized in that after the oil field enters a high water content period, the final recovery ratio of the oil field is greatly improved by adopting the technical routes of reconstructing an underground recognition system, reconstructing a well pattern structure and reconstructing a ground process flow.

Tertiary oil recovery: the method is a mode of improving the mutual performance of oil, gas, water and rock by using chemical substances and producing more petroleum.

Combining two parts and three parts: the method is characterized in that secondary development is firstly carried out, then tertiary oil recovery is carried out, a well pattern structure, fine water flooding and chemical compound flooding are subjected to ternary coupling, the synergistic fusion effect of the well pattern on the control degree of reserves, the water flooding sweep efficiency and the oil displacement efficiency is exerted, and the maximization of the recovery ratio amplitude is realized.

Two and three are combined to implement synchronously: and after secondary development, tertiary oil recovery is immediately carried out. "immediate" is understood to mean a relatively short period of time, such as the minimum preparation time required to switch from secondary development to tertiary recovery.

An exemplary application scenario of the technical solution of the embodiment of the present application is described below.

In the development process of oil field 'two-three combination', when different conversion time is adopted, different development effects can be brought by factors such as different oil reservoir conditions, different time for changing displacement medium and the like, so that the final recovery ratio, the precipitation amount, the internal yield and the like are changed, and different technical value, social value and economic value are brought. When a proper 'two-three combination' conversion time is selected, the technical value, the social value and the economic value of different conversion times are comprehensively considered, and a scheme with the optimal comprehensive value is optimized to obtain the optimal development effect.

Taking the oil field A as an example, the annual oil yield of the oil field A is 2 ten thousand tons, the extraction degree is 25 percent, the comprehensive water content is 92.5 percent, the next plan is developed by adopting a 'two-three combined' development mode, and the conversion time under the multi-target constraints of technical value, economic value, social value and the like needs to be optimized and designed, so that the method can be realized by the method provided by the embodiment of the application.

Fig. 1 is a flowchart of a method for determining a transition time of oil field two-three combined development according to an embodiment of the present application. The method is performed by a computer device, see fig. 1, the method comprising:

101. and (3) calling oil reservoir numerical simulation software by computer equipment to simulate the oil yield, the water content and the recovery ratio of the target oil field in a two-three combination mode at different conversion occasions, wherein the two-three combination mode refers to an oil field development mode of firstly carrying out secondary development and then transferring to tertiary oil recovery.

102. The computer equipment obtains at least one evaluation index in the two-three combined mode at different conversion opportunities based on the oil production, the water content and the recovery ratio in the two-three combined mode at different conversion opportunities, and the evaluation index is used for evaluating the development effect of the two-three combined mode.

103. And the computer equipment draws a conversion opportunity determination model graph based on at least one evaluation index in a two-three combination mode at different conversion opportunities, wherein the conversion opportunity determination model graph comprises a relation curve of each evaluation index and the conversion opportunity.

104. The computer device displays the conversion timing determination model map.

The method provided by the embodiment of the application is used for predicting data such as oil yield, water content and recovery ratio when the oil field adopts different conversion occasions by applying an oil reservoir numerical simulation method aiming at a two-three combined development process of firstly carrying out secondary development and then carrying out tertiary oil recovery on the oil field, and can obtain development effect evaluation indexes corresponding to different conversion occasions based on the data, so that relationship curves of the evaluation indexes and the conversion occasions are drawn into the same graph to obtain a model graph for determining the conversion occasions.

The flow shown in fig. 1 is a basic flow of the embodiment of the present disclosure, and a detailed flow of the technical solution of the present disclosure is described below based on the basic flow.

Fig. 2 is a flowchart of a method for determining a transition time of oil field two-three combined development according to an embodiment of the present application. The method is performed by a computer device, see fig. 2, the method comprising:

201. and (3) calling oil reservoir numerical simulation software by the computer equipment, and respectively simulating the oil production of the target oil field in a two-three combination mode at different conversion times.

Wherein, the different conversion time refers to the time for converting secondary development into tertiary oil recovery, and comprises the step of converting secondary development into tertiary oil recovery immediately (synchronous implementation of two and three combinations) and the step of converting secondary development into tertiary oil recovery at different time delays. In one example, the different transition opportunities may include transition to tertiary oil recovery immediately after secondary development, transition to tertiary oil recovery 1 year after secondary development, transition to tertiary oil recovery 2 year after secondary development, … …, transition to tertiary oil recovery n year after secondary development, where n is a positive integer.

The computer equipment can obtain the oil production under the two-three combination mode at different conversion time through the simulation of oil reservoir numerical simulation software based on the lithology, fluid and production dynamic data of the target oil field.

The oil production through numerical simulation is also the predicted oil production, and in one possible implementation, for any two-three combination mode of the conversion time, the oil production through numerical simulation prediction may include oil production at different production times in the future, and the computer device may obtain the oil production at the end of the life cycle of the oil field (for example, at the 20 th year) as the oil production at the two-three combination mode of the conversion time.

The simulation of other indexes, such as the water content, water yield, recovery ratio and well pattern perfectness ratio, and the simulation of oil yield in the following steps are the same, and are not described in detail below.

202. And (3) calling oil reservoir numerical simulation software by the computer equipment to respectively simulate the water content of the target oil field in a two-three combination mode at different conversion moments.

The simulation of the water content in step 202 is the same as the simulation of the oil yield in step 201, and is not described in detail.

203. And (3) calling numerical reservoir simulation software by the computer equipment, respectively simulating the recovery ratio of the target oil field in a two-three combined mode of basic water drive and different conversion occasions, and acquiring the recovery ratio amplification in the two-three combined mode of different conversion occasions based on the recovery ratio in the two-three combined mode of basic water drive and different conversion occasions, wherein the recovery ratio amplification refers to the recovery ratio increased by the two-three combined mode compared with the basic water drive.

Wherein, the recovery factor refers to the final production degree of the oil field. The recovery rate amplification can be used as an evaluation index of technical value.

For any two-three combination mode of the switching time, the computer equipment can subtract the recovery ratio under the two-three combination mode of the switching time from the recovery ratio under the basic water drive to obtain the recovery ratio amplification under the two-three combination mode of the switching time. Taking the case of switching from the 1 st year to the tertiary oil recovery after the secondary oil recovery as an example, the computer device may subtract the recovery ratio under the basic water flooding from the recovery ratio under the two-three combined mode of switching at the 1 st year to obtain the recovery ratio amplification under the two-three combined mode of switching at the 1 st year. Thus, for the two-three combination mode at different conversion time, the computer device can obtain the recovery ratio amplification under the two-three combination mode at different conversion time, that is, the recovery ratio amplification corresponding to different conversion time.

The present embodiments are exemplified in that the recovery factor amplification is compared to the basal water flooding, and in some embodiments, the recovery factor amplification may also be compared to the individual secondary development, in which case the computer device may simulate the recovery factor of the target oil field under the individual secondary development to obtain the recovery factor amplification of the two-three combination manner compared to the individual secondary development.

204. And (3) calling oil reservoir numerical simulation software by the computer equipment, respectively simulating the water yield of the target oil field in a two-three combination mode of basic water drive and different conversion occasions, and acquiring the precipitation in the two-three combination mode of different conversion occasions based on the water yield in the two-three combination mode of basic water drive and different conversion occasions, wherein the precipitation is the water yield reduced by the two-three combination mode compared with the basic water drive.

Since the water consumption in the crude oil extraction can be reduced by reducing the water production, and the influence on the social environment is reduced, the precipitation can be used as the evaluation index of the social value.

For any two-three combination mode at the conversion time, the computer equipment can subtract the water yield under the two-three combination mode at the conversion time from the water yield under the basic water drive to obtain the precipitation under the two-three combination mode at the conversion time. Taking the case of switching from the time of the conversion to the time of the tertiary oil recovery in the first year after the secondary oil recovery as an example, the computer device may subtract the water yield in the second-third combination mode converted in the first year from the water yield in the basic water drive to obtain the precipitation in the second-third combination mode converted in the first year. In this way, for the two-three combination modes at different conversion times, the computer device can acquire the precipitation amounts in the two-three combination modes at different conversion times, that is, the precipitation amounts corresponding to different conversion times.

205. The computer equipment obtains the internal yield rate in the two-three combined mode at different conversion occasions based on the oil production, the water content and the recovery ratio in the two-three combined mode at different conversion occasions, and the internal yield rate is obtained through a target evaluation method.

The internal yield can be used as an evaluation index of economic value.

For any two-three combination mode of the conversion time, the computer equipment can adopt an economic evaluation method to obtain the internal yield rate of the two-three combination mode of the conversion time based on the oil production, the water content and the recovery ratio of the two-three combination mode of the conversion time. In one possible implementation, the computer device may output the predicted internal rate of return using oil production, water cut, and recovery as input parameters to an internal rate of return formula. In this way, for the two-three combination modes at different conversion timings, the computer device may obtain the internal yields in the two-three combination modes at different conversion timings, that is, the internal yields corresponding to different conversion timings.

206. And (3) calling oil reservoir numerical simulation software by the computer equipment to simulate the well pattern perfectness of the target oil field in a two-three combined mode at different conversion moments.

The well pattern perfection rate can be used as an evaluation index of the well pattern perfection condition.

The above steps 203 to 206 are one possible implementation manner of the computer device obtaining at least one evaluation index in the two-three combination manner of different conversion timings. The implementation manner is only described by taking at least one evaluation index including recovery factor amplification, precipitation amount, internal yield and well pattern perfection rate as an example, and in some embodiments, other evaluation indexes can be adopted to evaluate the development effect of the two-three combination manner.

It should be noted that, in the embodiment of the present application, only the acquisition of the recovery factor increase, the precipitation amount, the internal rate of return, and the well pattern completion rate are described as the

steps

203, 204, 205, and 206, respectively, which do not represent a specific execution order, and the acquisition of these evaluation indexes may be performed by using other execution orders, which are not limited in the embodiment of the present application. Similarly, the simulation of oil production in step 201, the simulation of water cut in step 202, the simulation of oil recovery in step 203, the simulation of water production in step 204, and the simulation of well pattern completion in step 206 are not limited to specific execution sequences, and the simulation of these production indicators may also be performed in other execution sequences.

207. And the computer equipment draws a conversion time determination model diagram based on the recovery factor amplification, the precipitation, the internal yield and the well pattern perfectness under a two-three combination mode at different conversion times, wherein the conversion time determination model diagram comprises a relationship curve of the recovery factor amplification, the precipitation, the internal yield and the well pattern perfectness and the conversion time.

The computer device can draw a relation curve of the recovery ratio amplification and the conversion time based on the recovery ratio amplification in a two-three combination mode at different conversion times, the computer device can draw a relation curve of the precipitation amount and the conversion time based on the precipitation amount in the two-three combination mode at different conversion times, the computer device can draw a relation curve of the internal profitability and the conversion time based on the internal profitability in the two-three combination mode at different conversion times, and the computer device can draw a relation curve of the well network completion rate and the conversion time based on the well network completion rate in the two-three combination mode at different conversion times.

The computer device may plot the relationship plots in the same graph to obtain a conversion timing determination model graph, which may be used to determine a corresponding conversion timing, i.e., an optimal conversion timing, based on one or more target constraints corresponding to the recovery factor amplification, the precipitation, the internal rate of return, and the well pattern perfection.

Step 207 is a possible implementation manner of drawing a conversion timing determination model graph based on at least one evaluation index in a two-three combination manner at different conversion timings, where the conversion timing determination model graph includes a relationship curve between each evaluation index and the conversion timing. In some embodiments, other evaluation indexes may also be used, and the conversion timing determination model map obtained in this way may include curves of the other evaluation indexes and the conversion timing.

208. The computer device displays the conversion timing determination model map.

The computer device can display the conversion timing determination model graph to provide the conversion timing determination model graph visualization for the user, so that the user can determine the corresponding conversion timing according to the requirement.

The computer device may also determine and display a corresponding transition opportunity based on user demand, and in one possible implementation, displays a transition opportunity determination model map, including: and displaying the conversion time corresponding to the target constraint condition in the conversion time determination model diagram based on the target constraint condition corresponding to the at least one evaluation index.

Wherein the at least one evaluation index includes at least one of recovery factor amplification, precipitation, internal rate of return, and well pattern completion. The target constraints may be single target or multi-target constraints. For example, the target constraint condition may be a common constraint condition of four targets of recovery factor increase (technical value), internal profitability (economic value), precipitation (social value) and well pattern perfection (well pattern perfection), or an optimal internal profitability as a unique target constraint condition, or a highest recovery factor increase as a unique target constraint condition.

The model diagram is determined by applying the conversion time, so that the technical value, the economic value, the social value and the well pattern perfection condition can be comprehensively evaluated, and the optimum conversion time is optimized. And meanwhile, the method can also be used for design optimization of conversion opportunities based on a single target constraint condition.

Referring to fig. 3, fig. 3 is a schematic diagram of a conversion timing determination model diagram provided in an embodiment of the present application, where an oil field corresponding to the conversion timing determination model diagram may be an oil field a in the foregoing example, and as can be seen from fig. 3, a "two-three combination" development manner is adopted for the oil field a, so that the recovery ratio amplification (i.e., technical value), the precipitation amount (i.e., social value), and the well pattern perfection rate decrease with the delay of the conversion timing, but the recovery ratio amplification and the precipitation amount decrease are small, and the well pattern perfection rate decreases greatly; the internal rate of return (i.e., economic value) increases first and then decreases with the delay of the conversion opportunity, with the highest internal rate of return at the 3 rd year conversion. Under the common constraint of four targets of technical value, economic value, social value and well pattern perfection, the optimal conversion time of the oil field A, namely the combination of the two and the three, is from the 2 nd year to the 4 th year. Meanwhile, the model can also be used for the optimization design of the conversion opportunity under the single target constraint condition; if the highest economic value is taken as the only target constraint, the switching time with the highest internal yield is preferred, and the most suitable switching time is year 3; if the highest ultimate recovery is used as the only target constraint, i.e. when the aim is to produce more crude oil as much as possible, the switching time with the largest recovery amplification (i.e. the highest ultimate recovery) is preferred, and the most suitable switching time is the synchronous implementation of 'two-three combination'. If the maximum social value is taken as the only target constraint, namely the social value is taken as the weight, the switching time with the maximum precipitation is preferably selected, and the most suitable switching time is the synchronous implementation of 'two-three combination'.

The conversion opportunity determination model obtained by the method is a 'two-three combination' (secondary development is converted into tertiary oil recovery) full life cycle value chain model comprehensively considering the technical value, the economic value, the social value and the well pattern perfection condition, can be used for quantitative calculation or evaluation of the technical value, the economic value and the social value of the full life cycle under different conversion opportunities in the 'two-three combination' development process of an oil field, and guides the optimization design or decision of the conversion opportunity based on the 'two-three combination' under multi-target constraint, and the method is easy to understand and simple and convenient to operate.

The embodiment shown in fig. 2 is to obtain a conversion timing determination model map to determine conversion timings, wherein the conversion timings are distinguished by time (such as year), and the constraint condition corresponding to the evaluation index is used for determining the conversion timing. In some embodiments, the conversion timing may also be determined by other model diagrams, where the conversion timing may be distinguished by a water cut, and the constraint condition corresponding to the production index (oil production amount, water cut) may be used when determining the conversion timing. An oil production prediction model map that can also be used to determine the timing of the switch will be described below.

In an exemplary embodiment, computer equipment calls reservoir numerical simulation software, respectively simulates prediction data of the target oil field of the change of oil production along with production time when basic water drive, independent secondary development, two-three combined synchronous implementation and secondary development are carried out to different water contents, and then tertiary oil recovery is carried out, and an oil production prediction model graph drawn based on the prediction data is displayed.

The oil production prediction model graph comprises a relation curve of the oil production under each development mode and the production time. The oil production may be annual oil production.

For each development mode of switching to a tertiary oil recovery mode when basic water flooding, independent secondary development, two-three combined synchronous implementation and secondary development reach different water contents, the computer equipment can obtain the prediction data of the oil production quantity changing along with the production time through simulation of oil reservoir numerical simulation software based on lithology, fluid and production dynamic data of a target oil field.

The computer equipment can draw a relation curve of the oil yield and the production time under each development mode based on the prediction data of the oil yield changing along with the production time under each development mode, and draw the relation curves in the same graph to obtain an oil yield prediction model graph. Then, the computer equipment can display the oil production prediction model diagram to visually provide the oil production prediction model diagram for the user, so that the user can observe the prediction change condition of the oil production and determine the corresponding conversion time according to the requirement.

Referring to fig. 4, fig. 4 is a schematic diagram of an oil yield prediction model map provided in an embodiment of the present application, where an oil field corresponding to the oil yield prediction model map may be the a oil field in the previous example, the abscissa is the production year, and 20 years is used as the evaluation period, and as can be seen from the graph of oil yield and production time in fig. 4, the earlier the switching time is, the higher the early oil yield is, but the stable production period of the oil field is shorter, and the later yield is decreased gradually, for example, the early oil yield in the mode of switching to tertiary oil recovery immediately after the secondary development (two-three combined synchronous implementation) is higher than the early oil yield in the mode of switching to tertiary oil recovery when the secondary development reaches 84% of water content, and is also higher than the early oil yield in the mode of switching to tertiary oil recovery when the secondary development reaches 92% of water content. Therefore, when it is desired to obtain the yield as soon as possible, it is preferable to select the switching timing of early high yield, such as the two-three combination synchronous implementation.

The computer device may also determine and display a corresponding switching occasion based on the user demand, and in one possible implementation, displays an oil production prediction model map drawn based on the prediction data, including: and displaying the conversion time corresponding to the first constraint condition in the oil yield prediction model diagram based on the first constraint condition corresponding to the oil yield. For example, if the first constraint condition is that the yield is obtained as soon as possible, the computer device may mark the relationship curve between the oil yield and the production time in the two-three combined synchronous implementation in the oil yield prediction model diagram, so that the user can intuitively see that the optimal conversion time is the conversion from secondary development to tertiary oil recovery immediately.

By applying the oil reservoir numerical simulation method aiming at different development modes of the oil field, oil yield data of the oil field in different development modes are predicted, so that oil yield and production time relation curves in different development modes are drawn into the same graph, wherein the different development modes can comprise conversion time distinguished by water content, and the model graph obtained by applying the method considers the oil yield corresponding to different conversion time, so that the proper conversion time for converting secondary development into tertiary oil recovery can be determined, and the oil field development effect is improved.

Fig. 5 is a schematic structural diagram of a conversion timing determining device for oil field two-three combined development according to an embodiment of the present application. Referring to fig. 5, the apparatus includes:

the simulation module 501 is used for calling oil reservoir numerical simulation software to simulate the oil yield, the water content and the recovery ratio of a target oil field in a two-three combination mode at different conversion occasions, wherein the two-three combination mode refers to an oil field development mode of firstly carrying out secondary development and then carrying out tertiary oil recovery;

an obtaining module 502, configured to obtain at least one evaluation index in the two-three combination mode at different conversion timings based on oil production, water content, and recovery ratio in the two-three combination mode at different conversion timings, where the evaluation index is used to evaluate a development effect of the two-three combination mode;

a drawing module 503, configured to draw a conversion opportunity determination model map based on at least one evaluation index in a two-three combination manner at different conversion opportunities, where the conversion opportunity determination model map includes a relationship curve between each evaluation index and a conversion opportunity;

a display module 504, configured to display the conversion timing determination model map.

In one possible implementation manner, the display module 504 is configured to display a conversion timing corresponding to the target constraint condition in the conversion timing determination model map based on the target constraint condition corresponding to the at least one evaluation index.

In one possible implementation manner, the at least one evaluation index includes a recovery factor amplification, a precipitation amount, and an internal yield rate, the oil yield, the water content, and the recovery factor are based on a two-three combination manner at different conversion times, the recovery factor amplification refers to an increased recovery factor of the two-three combination manner compared to a basic water drive, the precipitation amount refers to a decreased water yield of the two-three combination manner compared to a basic water drive, and the internal yield rate is based on the oil yield, the water content, and the recovery factor in the two-three combination manner;

the simulation module 501 is further configured to:

and (4) invoking numerical reservoir simulation software to respectively simulate the water yield and the recovery ratio of the target oil field under the basic water drive.

In one possible implementation, the obtaining module 502 is configured to:

acquiring recovery factor amplification in a two-three combined mode at different conversion occasions based on recovery factors of a target oil field in a two-three combined mode at basic water flooding and different conversion occasions;

and obtaining internal profitability of the target oil field in the two-three combined mode at different conversion occasions based on the oil yield, the water content and the recovery ratio of the target oil field in the two-three combined mode at different conversion occasions, wherein the internal profitability is obtained by a target evaluation method.

In one possible implementation, the at least one evaluation indicator further includes a well pattern completion rate, and the simulation module 501 is further configured to:

and (4) calling oil reservoir numerical simulation software to respectively simulate the well pattern perfectness of the target oil field in a two-three combination mode at different conversion times.

In a possible implementation manner, the simulation module 501 is further configured to invoke oil reservoir numerical simulation software to simulate predicted data of the change of oil production with production time in a mode of transferring the oil production to tertiary oil recovery when the basic water drive, the independent secondary development, the two-three combined synchronous implementation and the secondary development reach different water contents in a target oil field, wherein the two-three combined synchronous implementation means that the tertiary oil recovery is immediately transferred after the secondary development;

the drawing module 503 is further configured to draw an oil production prediction model map based on the prediction data of the oil production amount along with the change of the production time, wherein the oil production prediction model map includes a relation curve between the oil production amount and the production time in each development mode;

the display module 504 is further configured to display an oil production prediction model map.

In the embodiment of the application, aiming at a two-three combined development process of firstly carrying out secondary development and then carrying out tertiary oil recovery on an oil field, a method of numerical reservoir simulation is applied to predict data such as oil yield, water content and recovery ratio when the oil field adopts different conversion occasions, development effect evaluation indexes corresponding to different conversion occasions can be obtained based on the data, so that relation curves of the evaluation indexes and the conversion occasions are drawn into the same graph to obtain a model graph for determining the conversion occasions, the development effect evaluation indexes of different conversion occasions are comprehensively considered by applying the model graph, the proper conversion occasions from the secondary development to the tertiary oil recovery can be determined, and the development effect of the oil field is improved.

It should be noted that: the device for determining a transition time of two-in-three combined development in an oil field provided in the above embodiment is only illustrated by the above division of each function module when determining the transition time of two-in-three combined development in the oil field, and in practical applications, the function allocation may be completed by different function modules as needed, that is, the internal structure of the equipment is divided into different function modules to complete all or part of the above-described functions. In addition, the device for determining the conversion time of the two-in-three combined development of the oil field and the method for determining the conversion time of the two-in-three combined development of the oil field provided by the embodiment belong to the same concept, and the specific implementation process is described in the method embodiment and is not described herein again.

The embodiment of the application provides computer equipment, which comprises one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors, so that the conversion opportunity determination method for oil field two-three combined development provided by the embodiments is realized.

In an exemplary embodiment, the computer device is provided as a terminal. The structure of the terminal is described as follows:

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application. The terminal 600 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The terminal 600 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.

In general, the terminal 600 includes: one or more processors 601 and one or more memories 602.

The processor 601 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 601 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 601 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 601 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content that the display screen needs to display. In some embodiments, processor 601 may also include an AI (Artificial Intelligence) processor for processing computational operations related to machine learning.

The memory 602 may include one or more computer-readable storage media, which may be non-transitory. The memory 602 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in the memory 602 is used to store at least one program code for execution by the processor 601 to implement the conversion timing determination method of oilfield two-three joint development provided by the method embodiments herein.

In some embodiments, the terminal 600 may further optionally include: a peripheral interface 603 and at least one peripheral. The processor 601, memory 602, and peripheral interface 603 may be connected by buses or signal lines. Various peripheral devices may be connected to the peripheral interface 603 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 604, a display 605, a camera assembly 606, an audio circuit 607, a positioning component 608, and a power supply 609.

The peripheral interface 603 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 601 and the memory 602. In some embodiments, the processor 601, memory 602, and peripheral interface 603 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 601, the memory 602, and the peripheral interface 603 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

The Radio Frequency circuit 604 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 604 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 604 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 604 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 604 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 604 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display 605 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 605 is a touch display screen, the display screen 605 also has the ability to capture touch signals on or over the surface of the display screen 605. The touch signal may be input to the processor 601 as a control signal for processing. At this point, the display 605 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 605 may be one, disposed on the front panel of the terminal 600; in other embodiments, the display 605 may be at least two, respectively disposed on different surfaces of the terminal 600 or in a folded design; in other embodiments, the display 605 may be a flexible display disposed on a curved surface or a folded surface of the terminal 600. Even more, the display 605 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The Display 605 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and the like.

The camera assembly 606 is used to capture images or video. Optionally, camera assembly 606 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 606 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

Audio circuitry 607 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 601 for processing or inputting the electric signals to the radio frequency circuit 604 to realize voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 600. The microphone may also be an array microphone or an omni-directional acquisition microphone. The speaker is used to convert electrical signals from the processor 601 or the radio frequency circuit 604 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 607 may also include a headphone jack.

The positioning component 608 is used for positioning the current geographic Location of the terminal 600 to implement navigation or LBS (Location Based Service). The Positioning component 608 can be a Positioning component based on the united states GPS (Global Positioning System), the chinese beidou System, the russian graves System, or the european union's galileo System.

Power supply 609 is used to provide power to the various components in terminal 600. The power supply 609 may be ac, dc, disposable or rechargeable. When the power supply 609 includes a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, the terminal 600 also includes one or more sensors 610. The one or more sensors 610 include, but are not limited to: acceleration sensor 611, gyro sensor 612, pressure sensor 613, fingerprint sensor 614, optical sensor 615, and proximity sensor 616.

The acceleration sensor 611 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 600. For example, the acceleration sensor 611 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 601 may control the display screen 605 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 611. The acceleration sensor 611 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 612 may detect a body direction and a rotation angle of the terminal 600, and the gyro sensor 612 and the acceleration sensor 611 may cooperate to acquire a 3D motion of the user on the terminal 600. The processor 601 may implement the following functions according to the data collected by the gyro sensor 612: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

Pressure sensors 613 may be disposed on the side bezel of terminal 600 and/or underneath display screen 605. When the pressure sensor 613 is disposed on the side frame of the terminal 600, a user's holding signal of the terminal 600 can be detected, and the processor 601 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 613. When the pressure sensor 613 is disposed at the lower layer of the display screen 605, the processor 601 controls the operability control on the UI interface according to the pressure operation of the user on the display screen 605. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 614 is used for collecting a fingerprint of a user, and the processor 601 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 614, or the fingerprint sensor 614 identifies the identity of the user according to the collected fingerprint. Upon identifying that the user's identity is a trusted identity, the processor 601 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 614 may be disposed on the front, back, or side of the terminal 600. When a physical button or vendor Logo is provided on the terminal 600, the fingerprint sensor 614 may be integrated with the physical button or vendor Logo.

The optical sensor 615 is used to collect the ambient light intensity. In one embodiment, processor 601 may control the display brightness of display screen 605 based on the ambient light intensity collected by optical sensor 615. Specifically, when the ambient light intensity is high, the display brightness of the display screen 605 is increased; when the ambient light intensity is low, the display brightness of the display screen 605 is adjusted down. In another embodiment, the processor 601 may also dynamically adjust the shooting parameters of the camera assembly 606 according to the ambient light intensity collected by the optical sensor 615.

A proximity sensor 616, also known as a distance sensor, is typically disposed on the front panel of the terminal 600. The proximity sensor 616 is used to collect the distance between the user and the front surface of the terminal 600. In one embodiment, when proximity sensor 616 detects that the distance between the user and the front face of terminal 600 gradually decreases, processor 601 controls display 605 to switch from the bright screen state to the dark screen state; when the proximity sensor 616 detects that the distance between the user and the front face of the terminal 600 is gradually increased, the processor 601 controls the display 605 to switch from the breath-screen state to the bright-screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 6 is not intended to be limiting of terminal 600 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

In an exemplary embodiment, a computer readable storage medium, such as a memory, storing at least one program code, which is loaded and executed by a processor, is further provided to implement the method for determining a conversion time for oil field two-three combined development in the above embodiments. For example, the computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

In an exemplary embodiment, a computer program product or a computer program is also provided, which comprises program code, which is stored in a computer-readable storage medium. The processor of the computer device reads the program code from the computer-readable storage medium, and executes the program code, so that the computer device executes the method for determining the conversion timing of the oil field two-three combined development in the above embodiment.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for determining conversion time of oil field two-three combined development is characterized by comprising the following steps:

invoking oil reservoir numerical simulation software to simulate oil yield, water content and recovery ratio of a target oil field in a two-three combined mode at different conversion occasions, wherein the two-three combined mode refers to an oil field development mode of firstly carrying out secondary development and then transferring to tertiary oil recovery;

and displaying the conversion timing determination model diagram.

2. The switching opportunity determining method according to claim 1, wherein the displaying the switching opportunity determination model map includes:

3. The method of claim 1, wherein the at least one evaluation index comprises an enhanced recovery factor, an enhanced rainfall, and an internal yield, the enhanced recovery factor is an increased recovery factor of the two-three combination compared to the basal water flooding, the rainfall is a decreased water production of the two-three combination compared to the basal water flooding, and the internal yield is based on the oil production, the water cut, and the recovery factor of the two-three combination;

4. The method of claim 3, wherein the obtaining at least one evaluation index in the two-three combined mode at different conversion occasions based on the oil production, the water cut and the recovery factor in the two-three combined mode at different conversion occasions comprises:

5. The method of claim 1, wherein the at least one evaluation indicator further comprises a well pattern completion rate, the method further comprising:

6. The method for determining switching occasions according to claim 1, characterized in that it further comprises:

and displaying the oil yield prediction model diagram.

7. A conversion opportunity determination device for oil field two-three combined development is characterized by comprising:

8. The apparatus of claim 7, wherein the display module is configured to:

9. A computer device comprising one or more processors and one or more memories having at least one program code stored therein, the at least one program code being loaded into and executed by the one or more processors to implement the method for determining conversion opportunities in oilfield development in two-three joints as claimed in any one of claims 1 to 6.

10. A computer-readable storage medium having stored therein at least one program code, the at least one program code being loaded and executed by a processor, to implement the method for determining conversion timing for oilfield development of two-three combinations as claimed in any one of claims 1 to 6.