Method and device for optimizing productivity structure
By establishing a quantitative prediction method, calculating the key indicators of capacity wells under different capacity construction types, and building multiple capacity allocation plans, the problem of production capacity forming output and benefit prediction in oilfield development is solved, and rapid effect and efficiency prediction and reasonable capacity structure allocation are achieved.
Patent Information
- Application Number
- CN202311707893.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2025-06-13
AI Technical Summary
In the development of oil field, it is difficult to effectively predict the output and benefits of production capacity under different types of reservoirs or development methods, which makes it difficult to quantify the subsequent prediction trend of oil field development results.
By establishing a quantitative prediction method, the average daily oil production, contribution rate, induction rate and annual output surplus rate of typical capacity wells under different types of oil reservoirs or development methods are calculated according to the main indicators of different types of oil reservoirs or development methods, a production profile is formed, and multiple capacity allocation plans are constructed to calculate the annual output and internal rate of return of each plan to select a reasonable capacity structure allocation plan.
It has achieved rapid effect and benefit prediction of capacity construction scale allocation plans under different reservoir types, different well types, and different development methods. It can select reasonable capacity structure allocation plans based on output demand or profit demand to improve the efficiency of oil field development.
Smart Images
Figure CN120146239A_ABST
Abstract
Description
Technical Field
[0001] The present invention is applicable to the field of oil reservoir engineering for oil and gas field development. The present invention is used for classifying and evaluating the production effects of production wells and reasonably allocating different types of production capacities. More specifically, the present invention relates to a method and device for optimizing production capacity structure. Background Art
[0002] During the process of oilfield development, new wells developed under different types of oil reservoirs or the same oil reservoir using different development technologies have different production characteristics and different investments. Affected by this, the development effects of subsequent oilfields are also different. Currently, the oilfield mainly uses empirical methods or methods of analogy with previous years for the production capacity allocation of different types of production objects, and there are problems that it is difficult to quantify the prediction trend of the overall production effect of subsequent production. Therefore, when the oilfield production capacity construction investment or the number of production capacities is certain, it is necessary to establish a reasonable configuration method for the production capacity configuration under different types of production capacity combinations, and reasonably match the production capacity construction volume under different types of oil reservoirs or development methods from the aspects of benefit and effect, so as to achieve different production requirements. Summary of the Invention
[0003] The purpose of the present invention is to establish a method for quantitatively predicting the production and benefit of different production capacity compositions under different types of oil reservoirs or production construction methods according to the main indicators under different types of oil reservoirs or development methods, so as to provide data reference for the oilfield to select a reasonable production capacity construction composition. That is, the purpose of the present invention is to provide a method and device for optimizing production capacity structure.
[0004] In order to solve the above technical problems or achieve the above purpose, the present invention adopts the following specific technical solutions:
[0005] According to one aspect of the present invention, there is provided a method for optimizing production capacity structure, including the following steps:
[0006] 1) Select typical production wells under different production capacity construction types respectively, and calculate the average initial daily oil production, contribution rate, arrival rate, and annual production remaining rate of the production wells under each production capacity construction type respectively, so as to form a production profile of the typical production wells;
[0007] 2) Determine the average single-well construction cost and the corresponding operating cost per ton of oil of the new wells actually implemented under different production capacity construction types in actual construction;
[0008] 3) Under the total production capacity of the oilfield, divide the production capacities corresponding to each production capacity construction type according to different production construction ratios respectively and construct multiple production capacity configuration plans for production capacity construction, and calculate the annual production and internal rate of return of each production capacity configuration plan respectively according to the production profile of the typical production wells, the average single-well construction cost, and the corresponding operating cost per ton of oil;
[0009] 4) Compare the annual production and internal rate of return of each production capacity configuration plan, and select a reasonable production capacity structure configuration plan according to the production demand or benefit demand.
[0010] In one embodiment of the present invention, in step 1), different production capacity construction types are production capacity constructions under different types of oil reservoirs, different development methods, or different well types.
[0011] In one embodiment of the present invention, in step 1), different production capacity construction types include three production capacity construction types: secondary development, combination of secondary and tertiary development, and comprehensive adjustment.
[0012] In one embodiment of the present invention, in step 1), the annual production remaining rate is the annual production remaining rate from the 3rd to the 10th year.
[0013] In one embodiment of the present invention, in step 1), the single well production capacity = average initial daily oil production per single well × 300 / 10000, in ten thousand tons.
[0014] In one embodiment of the present invention, in step 1), contribution rate = first-year production of production capacity well / single well production capacity; arrival rate = second-year production of production capacity well / single well production capacity; the annual production remaining rate in the i-th year = N i / single well production capacity, where N i is the annual production in the i-th year, in ten thousand tons.
[0015] In one embodiment of the present invention, in step 3), calculate the annual production and internal rate of return for the 1st to 10th years under each production capacity configuration plan respectively.
[0016] In one embodiment of the present invention, in step 3), calculate the annual production and internal rate of return for the 1st to 10th years of each production capacity construction type under each production capacity configuration plan respectively, and then obtain the annual production and internal rate of return of each production capacity configuration plan through the weighted average algorithm.
[0017] In one embodiment of the present invention, in step 3), it further includes calculating the number of wells required for each production capacity construction type under each production capacity configuration plan according to the average initial daily oil production per single well, and further calculating the investment for each production capacity construction type under each production capacity configuration plan, and then obtaining the number of wells and investment of each production capacity configuration plan through the weighted average algorithm.
[0018] According to another aspect of the present invention, there is provided a production capacity structure optimization device, including:
[0019] The first module is configured to respectively select typical production capacity wells under different production capacity construction types, and respectively calculate the average initial daily oil production, contribution rate, arrival rate, and annual production remaining rate of the production capacity wells under each production capacity construction type to form the production profile of the typical production capacity wells.
[0020] The second module is configured to determine the average construction cost per well of newly drilled wells actually implemented under different production capacity construction types in actual construction and the corresponding operating cost per ton of oil.
[0021] The third module is configured to divide the production capacity numbers corresponding to each production capacity construction type according to different production construction ratios under the total oilfield production capacity construction, construct multiple production capacity allocation plans for production capacity construction, and calculate the annual production and internal rate of return of each production capacity allocation plan respectively based on the production profiles, average construction cost per well, and corresponding operating cost per ton of oil of typical production capacity wells.
[0022] The fourth module is configured to compare the annual production and internal rate of return of each production capacity allocation plan, and select a reasonable production capacity structure allocation plan according to production demand or benefit demand.
[0023] By adopting the above technical solutions, the present invention has the following advantages compared with the prior art:
[0024] The present invention has strong operability and can achieve rapid prediction of the effect and benefit of the production capacity construction scale distribution plan under different reservoir types, well types, and development methods; the present invention completes the prediction and selection of the production capacity allocation plan under different development requirements through the comparison of indicators such as cumulative oil production in the first year, cumulative oil production in stages, and internal rate of return. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other embodiments based on these drawings without creative efforts.
[0026] Figure 1 shows a schematic flow chart of a production capacity structure optimization method provided by the present invention;
[0027] Figure 2 shows a comparison curve graph of the annual production and internal rate of return of each of the four production capacity allocation plans adopted in the embodiments of the present invention in the 1st - 10th years. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments of the present invention are described in detail, those skilled in the art can easily appreciate that various modifications are feasible without substantially departing from the teachings of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other substitutions, modifications, variations and deletions can be made to the design, operating conditions, parameters, etc. of the following exemplary embodiments.
[0029] As Figure 1 shown, according to one aspect of the present invention, there is provided a method for optimizing production capacity structure, including the following steps:
[0030] S101: Select typical production wells under different production capacity construction types respectively, and calculate the average initial daily oil production, contribution rate, arrival rate and annual production remaining rate of the production wells under each production capacity construction type respectively to form the production profile of the typical production wells;
[0031] S102: Determine the average single-well construction cost and the corresponding operating cost per ton of oil of the new wells actually implemented under different production capacity construction types in actual construction;
[0032] S103: Under the total production capacity of the oilfield, divide the production capacity numbers corresponding to each production capacity construction type according to different production construction ratios respectively and construct multiple production capacity allocation plans for production capacity construction, and calculate the annual production and internal rate of return of each production capacity allocation plan respectively according to the production profile of the typical production wells, the average single-well construction cost and the corresponding operating cost per ton of oil;
[0033] S104: Compare the annual production and internal rate of return of each production capacity allocation plan, and select a reasonable production capacity structure allocation plan according to the production demand or benefit demand.
[0034] The present invention has strong operability and can realize the rapid prediction of the effect and benefit of the production capacity construction scale distribution plan under different reservoir types, different well types and different development methods; the present invention completes the prediction and selection of the production capacity allocation plan under different development demands through the comparison of indicators such as the cumulative oil production in the first year, the cumulative oil production in stages, and the internal rate of return.
[0035] In the above method, in S101, different production capacity construction types are production capacity constructions under different types of reservoirs, different development methods or different well types; different production capacity construction types include three production capacity construction types: secondary development, combination of secondary and tertiary development, and comprehensive adjustment; the annual production remaining rate is the annual production remaining rate from the 3rd to the 10th year; single-well production capacity = average initial daily oil production of a single well × 300 / 10000, 10,000 tons; contribution rate = first-year production of the production well / single-well production capacity; arrival rate = second-year production of the production well / single-well production capacity; the annual production remaining rate of the i-th year = N i / Single-well production capacity, where N i is the annual output in the i-th year, in 10,000 tons.
[0036] In the above method, in S103, the annual outputs and internal rates of return for the 1st to 10th years under each production capacity configuration plan are calculated respectively.
[0037] In the above method, in S103, the annual outputs and internal rates of return for the 1st to 10th years of each production capacity construction type under each production capacity configuration plan are calculated respectively, and then the annual outputs and internal rates of return of each production capacity configuration plan are obtained through the weighted average algorithm.
[0038] In the above method, in S103, it also includes calculating the number of wells required for each production capacity construction type under each production capacity configuration plan based on the average initial daily oil production per well, and further calculating the investment for each production capacity construction type under each production capacity configuration plan, and then obtaining the number of wells and investment of each production capacity configuration plan through the weighted average algorithm.
[0039] In addition, the present invention also provides a production capacity structure optimization device, including:
[0040] The first module is configured to respectively select typical production capacity wells under different production capacity construction types, and calculate the average initial daily oil production per well, contribution rate, in-place rate, and annual output surplus rate of the production capacity wells under each production capacity construction type respectively, and form the production output profile of the typical production capacity wells;
[0041] The second module is configured to determine the average single-well construction cost and the corresponding operating cost per ton of oil for the new wells actually implemented under different production capacity construction types in actual construction;
[0042] The third module is configured to divide the production capacity numbers corresponding to each production capacity construction type according to different production capacity construction ratios respectively under the total production capacity of the oilfield, and construct multiple production capacity configuration plans for production capacity construction, and calculate the annual output and internal rate of return of each production capacity configuration plan respectively according to the production output profile of the typical production capacity wells, the average single-well construction cost, and the corresponding operating cost per ton of oil;
[0043] The fourth module is configured to compare the annual outputs and internal rates of return of each production capacity configuration plan, and select a reasonable production capacity structure configuration plan according to the production output demand or benefit demand.
[0044] The above technical solutions of the present invention will be described in detail below through specific embodiments.
[0045] In order to evaluate the key indicators of production wells in different types of reservoirs, different development methods, or different well types, the present invention optimizes the key indicators and establishes a method for predicting production and benefits under different combinations of production capacity construction structures. By separately predicting the initial annual production, cumulative production in stages, and internal rate of return of each type of production capacity, relevant indicators of the overall plan are predicted, and a reasonable combination of production capacity construction is optimized. The specific method adopted in the embodiment of the present invention is as follows: (1) Representative production wells in different types of reservoirs or different development methods are separately selected. (2) The average initial daily oil production per well, contribution rate, arrival rate, and annual production remaining rate in the 3rd - 10th years of typical wells in different types of reservoirs or different development methods are separately calculated to form the production profile of typical single wells, where the single - well production capacity = average initial daily oil production per well × 300 / 10000, in ten thousand tons; contribution rate = initial annual production of the production well / single - well production capacity; arrival rate = annual production of the production well in the second year / single - well production capacity; the annual production remaining rate in the i - th year = N i / single - well production capacity, where N i is the annual production in the i - th year, in ten thousand tons. (3) The average construction cost per well and the corresponding operating cost per ton of oil for the new wells actually implemented in different types of reservoirs or development methods in actual construction are determined. (4) Under the total production capacity construction of the oilfield, according to different production construction ratios, the corresponding production capacities of various types of reservoirs or development methods are divided, and multiple production capacity configuration plans for production capacity construction are constructed. According to the production profile of typical wells, the average construction cost per well, and the corresponding operating cost per ton of oil, the production, funds to be invested, and internal rate of return ratio in the first year of production construction and the 2nd - 10th years of each production capacity configuration plan are separately predicted. At the same time, the number of wells required for the corresponding type of production capacity is calculated based on the average initial daily oil production per well, and then the weighted average is calculated to obtain the annual production, investment, internal rate of return, and number of wells from the 1st to the 10th years of each production capacity configuration plan. (5) The annual production, investment, internal rate of return, and number of wells of each production capacity configuration plan are compared, and a reasonable production capacity structure configuration plan is selected according to production demand or benefit demand. This method can not only be used for optimizing the production capacity structure of different types of reservoirs and different development methods, but also for optimizing the production scale of different well types, providing a reference for optimizing and configuring the oilfield production capacity construction plan.
[0046] More specifically, in the embodiment of the present invention, taking three types of production capacity construction, namely secondary development, combination of secondary and tertiary development, and comprehensive adjustment, as examples, the plan under a production capacity construction scale of 500,000 tons is optimized:
[0047] 1. Representative production wells are separately selected according to the three types of production capacity construction, namely secondary development, combination of secondary and tertiary development, and comprehensive adjustment, and the key indicators are calculated to obtain the average initial daily oil production per well, contribution rate, arrival rate, and annual production remaining rate from the 3rd to the 10th years of their respective types. The specific relevant data are shown in Table 1 below.
[0048] Table 1 Main Parameters of Three Types of Production Capacity Construction
[0049]
[0050] 2. Determine the average construction cost per well and the corresponding operating cost per ton of oil for the three types of production capacity construction wells according to the actual situation. The specific data is shown in Table 2 below.
[0051] Table 2 Average Investment per Well and Operating Cost per Ton of Oil for Three Types of Production Capacity
[0052] Type Average investment per single well (10,000 tons) Operating cost per ton of oil (yuan / ton) Secondary development 35345 900 Combination of secondary and tertiary recovery 52846 900 Comprehensive adjustment 95647 900
[0053] 3. The total production capacity is 500,000 tons, which is composed of different quantities of three types of production capacity: secondary development, combination of secondary and tertiary development, and comprehensive adjustment. Four scenarios are set. As shown in Table 3 below.
[0054] Table 3 Different Scenario Combinations of Three Types of Production Capacity
[0055]
[0056] For each scenario, based on the quantities of the three types of production capacity and combining the relevant parameters in Table 1 and Table 2, the annual production, number of wells, investment, and internal rate of return for each type from year 1 to year 10 can be calculated respectively, and then the annual production, number of wells, investment, and internal rate of return for each scenario from year 1 to year 10 can be obtained through weighted average calculation. For example, as shown in Tables 4 and 5 below, the production capacity of each type and the production and benefits of Scenario 1 as a whole are shown.
[0057] Table 4 Production and Investment Forecast Table for Scenario 1
[0058]
[0059] Table 5 Cash Flow and Internal Rate of Return Table for Scenario 1
[0060] Economic benefit IRR 1 year 2 years 3 years 4 years 5 years 6 years 7 years 8 years 9 years 10 years Secondary development 12.9 -28429 8400 6774 5938 5264 4666 4136 3666 3249 2880 Combination of secondary and tertiary recovery 2.9 -94491 19328 15966 14091 12490 11071 9813 8698 7710 6834 Comprehensive adjustment 4.4 -51613 14560 9681 7607 6399 5589 4951 4389 3890 3448 Total 5.0 -174533 42288 32421 27636 24153 21325 18900 16753 14849 13162
[0061] Similarly, the above relevant data for Scenario 2, Scenario 3, and Scenario 4 can be calculated. The above relevant data tables for Scenario 2, Scenario 3, and Scenario 4 are omitted here.
[0062] 4. Compare the annual production (including annual production from year 1 to year 10, initial annual production, and cumulative production), number of wells, input or investment, and internal rate of return of the four scenarios calculated respectively, as shown in Tables 6, 7, and Figure 2 as shown. Then, select a reasonable production capacity structure configuration scenario according to the production demand or benefit demand.
[0063] Table 6 Annual Production Comparison Table for Four Scenarios
[0064] Plan 1 year 2 years 3 years 4 years 5 years 6 years 7 years 8 years 9 years 10 years Plan 1 21.6 30.2 23.2 19.7 17.3 15.2 13.5 12.0 10.6 9.4 Plan 2 22.2 31.0 24.5 21.3 18.7 16.6 14.7 13.0 11.5 10.2 Plan 3 22.6 29.3 22.3 18.9 16.6 14.6 12.9 11.5 10.2 9.0 Plan 4 22.0 28.5 20.9 17.4 15.1 13.3 11.8 10.4 9.2 8.2
[0065] Table 7 Comparison of Cumulative Output, Input, and Internal Rate of Return for Four Schemes
[0066]
[0067] From the data in the above Tables 6 - 7 and with reference to Figure 2 As shown, when the total production capacity construction is 500,000 tons, through four schemes to carry out the output - benefit test under different production capacity construction structures, for the optimization of the production capacity construction structure, the scheme with the highest contribution rate is Scheme 3, with the best benefit, and the proportion of the number of each type of production capacity is 2:1:2; the scheme with the smallest annual output decline and the highest cumulative output is Scheme 2, with medium benefit, and the proportion of the number of each type of production capacity is 2:2:1.
[0068] Therefore, the present invention conducts a key - index evaluation on the production - capacity wells of the production - capacity construction type, selects the key indexes, establishes a method for predicting the output and benefit under different combinations of production - capacity construction structures. By respectively predicting the first - year output, stage cumulative output, and internal rate of return of each type of production capacity, the relevant indexes of the overall scheme are predicted, and a reasonable production - capacity construction combination is selected.
[0069] The above is only the preferred embodiment of the present invention and is not used to limit the scope of implementation of the present invention; if the present invention is modified or equivalently replaced without departing from the spirit and scope of the present invention, it should be covered by the protection scope of the claims of the present invention.
Claims
1. A method for optimizing production capacity structure, characterized in that, it includes the following steps: 1) Select typical production capacity wells under different production capacity construction types respectively, and calculate the average initial daily oil production per well, contribution rate, in-place rate and annual production remaining rate of the production capacity wells under each production capacity construction type respectively to form the production profile of the typical production capacity wells; 2) Determine the average single-well construction cost and corresponding operation cost per ton of oil of the new wells actually implemented under different production capacity construction types in actual construction; 3) Under the total production capacity of the oilfield, divide the production capacity numbers corresponding to each production capacity construction type according to different production capacity construction ratios respectively and construct multiple production capacity configuration plans for production capacity construction, and calculate the annual production and internal rate of return of each production capacity configuration plan respectively according to the production profile of the typical production capacity wells, average single-well construction cost and corresponding operation cost per ton of oil; 4) Compare the annual production and internal rate of return of each production capacity configuration plan, and select a reasonable production capacity structure configuration plan according to production demand or benefit demand.
2. The production capacity structure optimization method according to claim 1, characterized in that, in step 1), different production capacity construction types are production capacity construction under different types of reservoirs, different development methods or different well types.
3. The production capacity structure optimization method according to claim 2, characterized in that, in step 1), different production capacity construction types include three production capacity construction types: secondary development, combination of secondary and tertiary development and comprehensive adjustment.
4. The production capacity structure optimization method according to claim 3, characterized in that, in step 1), the annual production remaining rate is the annual production remaining rate from the 3rd to the 10th year.
5. The production capacity structure optimization method according to claim 4, characterized in that, in step 1), single-well production capacity = average initial daily oil production per well × 300 / 10000, in ten thousand tons.
6. The production capacity structure optimization method according to claim 5, characterized in that, In step 1), contribution rate = first-year output of production well / single-well production capacity; arrival rate = second-year output of production well / single-well production capacity; remaining rate of annual output in the i-th year = N i / single-well production capacity, where N i is the annual output in the i-th year, in 10,000 tons.
7. The production capacity structure optimization method according to claim 1, characterized in that, in step 3), calculate the annual production and internal rate of return of each production capacity configuration plan from the 1st to the 10th year respectively.
8. The production capacity structure optimization method according to claim 7, characterized in that, in step 3), calculate the annual production and internal rate of return of each production capacity construction type under each production capacity configuration plan from the 1st to the 10th year respectively, and then obtain the annual production and internal rate of return of each production capacity configuration plan through the weighted average algorithm.
9. The production capacity structure optimization method according to claim 1, characterized in that, in step 3), it also includes calculating the number of wells required for each production capacity construction type under each production capacity configuration plan according to the average initial daily oil production per well, and further calculating the investment of each production capacity construction type under each production capacity configuration plan, and then obtaining the number of wells and investment of each production capacity configuration plan through the weighted average algorithm.
10. A production capacity structure optimization device, characterized in that, it includes: The first module, which is configured to respectively select typical production wells under different production capacity construction types, and respectively calculate the initial daily oil production per well, contribution rate, arrival rate, and annual production remaining rate of the production wells under each production capacity construction type, so as to form the production profile of the typical production wells; The second module, which is configured to determine the average construction cost per well and the corresponding operation cost per ton of oil of the new wells actually implemented under different production capacity construction types in actual construction; The third module, which is configured to divide the production capacities corresponding to each production capacity construction type according to different production construction ratios under the total production construction capacity of the oilfield, and construct multiple production capacity allocation schemes for production capacity construction, and respectively calculate the annual production volume and internal rate of return of each production capacity allocation scheme according to the production profile of the typical production wells, the average construction cost per well, and the corresponding operation cost per ton of oil; The fourth module, which is configured to compare the annual production volume and internal rate of return of each production capacity allocation scheme, and select a reasonable production capacity structure allocation scheme according to production demand or benefit demand.