Method for equivalent determination of mineral reserves
By drawing a cross-plot of the probability of mineral reserves occurrence, and combining mineral reserve parameters and calculation models, the equivalent mineral reserves of the target area are determined, which solves the problem of inaccurate mineral reserve evaluation in the existing technology and realizes accurate evaluation of mineral reserves.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2020-12-09
- Publication Date
- 2026-05-29
Smart Images
Figure CN114612258B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oil and gas field development technology, and in particular to an equivalent method for determining mineral reserves. Background Technology
[0002] Reserves and resources are defined as the amount of mineral resources that are contained within them, specifically referring to oil and natural gas, i.e., oil and gas. Reserves are mainly divided into three categories: proven reserves, probable reserves, and predicted reserves.
[0003] Currently, to evaluate mineral reserves, it is necessary to calculate equivalent reserves for discovered proven reserves, controlled reserves, predicted reserves, and resources. For example, the calculation of equivalent reserves is performed by halving the reserves in descending order of reliability. Specifically, proven reserves are equivalent to 50% of controlled reserves, controlled reserves to 50% of predicted reserves, and predicted reserves to 50% of resources. In CNPC's fourth resource assessment, the equivalent reserves were calculated as 75% of proven reserves, 75% of controlled reserves, and 50% of predicted reserves.
[0004] However, among the aforementioned related technologies, there is no basis for determining the equivalent reserves between proven reserves, controlled reserves, predicted reserves, and resources, resulting in inaccurate evaluation of mineral reserves. Summary of the Invention
[0005] This application provides a method for equivalent determination of mineral reserves, and a method for obtaining equivalent mineral reserves, providing a basis for determining equivalent mineral reserves and ensuring the accuracy of mineral reserve assessment. The technical solution is as follows:
[0006] This application provides a method for equivalent determination of mineral reserves, the method comprising:
[0007] Obtain mineral reserve parameters and a mineral reserves calculation model for the target area; wherein, the mineral reserve parameters are used to indicate the mineral storage status of the target area, and the mineral reserves calculation model is used to calculate the mineral reserves at each point in the target area;
[0008] Based on the mineral reserve parameters and the mineral reserves calculation model, obtain a cross-plot of the mineral reserves and the probability of their occurrence.
[0009] Based on the intersection map, the equivalent mineral reserves of the target area are obtained; wherein, the equivalent mineral reserves include the equivalent proven reserves of controlled reserves, the equivalent proven reserves of predicted reserves, and the equivalent proven reserves of resources.
[0010] In an illustrative embodiment, obtaining the equivalent mineral reserves of the target area based on the intersection map includes:
[0011] The probability of the occurrence of proven reserves, the probability of the occurrence of controlled reserves, the probability of the occurrence of predicted reserves, and the probability of the occurrence of resources in the target area are obtained.
[0012] Based on the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity, combined with the intersection map, the equivalent mineral reserves of the target area are obtained.
[0013] In an illustrative embodiment, obtaining the probability of the occurrence of proven reserves, the probability of the occurrence of controlled reserves, the probability of the occurrence of predicted reserves, and the probability of the occurrence of resource quantity in the target area includes:
[0014] Based on the reliability of the mineral reserve parameters, the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity are determined.
[0015] In an illustrative embodiment, obtaining the equivalent mineral reserves of the target area based on the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity, in conjunction with the intersection map, includes:
[0016] Based on the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity are obtained from the intersection map.
[0017] Based on the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity, the equivalent mineral reserves of the target area are obtained; wherein, the equivalent mineral reserves include the equivalent proven reserves of the controlled reserves, the equivalent proven reserves of the predicted reserves, and the equivalent proven reserves of the resource quantity.
[0018] In an illustrative embodiment, obtaining the equivalent mineral reserves of the target area based on the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity includes:
[0019] The mineral reserves with a 5% occurrence probability are obtained from the intersection map and determined as the maximum mineral reserves.
[0020] The mineral reserves with a 95% probability of occurrence are obtained from the intersection map and determined as the minimum mineral reserves.
[0021] The ratio coefficient of the mineral reserves is obtained based on the maximum mineral reserves, the minimum mineral reserves, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity.
[0022] Based on the ratio coefficient, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity, the equivalent mineral reserves of the target area are obtained.
[0023] In an exemplary embodiment, obtaining the ratio coefficient of the mineral reserves based on the maximum mineral reserves, the minimum mineral reserves, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity includes:
[0024] Based on the maximum mineral reserves, the minimum mineral reserves, and the proven reserves, obtain the ratio coefficient of the proven reserves;
[0025] Based on the maximum mineral reserves, the minimum mineral reserves, and the controlled reserves, obtain the ratio coefficient of the controlled reserves;
[0026] Based on the maximum mineral reserves, the minimum mineral reserves, and the predicted reserves, obtain the ratio coefficient of the predicted reserves;
[0027] The ratio coefficient of the resource quantity is obtained based on the maximum mineral reserves, the minimum mineral reserves, and the resource quantity.
[0028] In an exemplary embodiment, the ratio coefficients include the ratio coefficients for the proven reserves, the ratio coefficients for the controlled reserves, the ratio coefficients for the predicted reserves, and the ratio coefficients for the resource quantity;
[0029] The process of obtaining the equivalent mineral reserves of the target area based on the ratio coefficient, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity includes:
[0030] Based on the ratio coefficient of the controlled reserves and the ratio coefficient of the proven reserves, the equivalent proven reserves of the controlled reserves are obtained;
[0031] Based on the ratio coefficient of the predicted reserves and the ratio coefficient of the proven reserves, the equivalent proven reserves of the predicted reserves are obtained.
[0032] Based on the ratio coefficient of the resource quantity and the ratio coefficient of the proven reserves, the equivalent proven reserves of the resource quantity are obtained.
[0033] In an exemplary embodiment, the mineral reserve parameters include the minimum value of basic oil and gas-bearing area, the minimum value of basic reservoir thickness, the minimum value of basic porosity, the minimum value of basic oil and gas saturation, the minimum value of basic volume coefficient, the average value of basic oil and gas-bearing area, the average value of basic reservoir thickness, the average value of basic porosity, the average value of basic oil and gas saturation, the average value of basic volume coefficient, the maximum value of basic oil and gas-bearing area in the target area, the maximum value of basic reservoir thickness, the maximum value of basic porosity, the maximum value of basic oil and gas saturation, and the maximum value of basic volume coefficient.
[0034] In an exemplary embodiment, obtaining a cross-plot of mineral reserves and the probability of occurrence of mineral reserves based on the mineral reserve parameters and the mineral abundance calculation model includes:
[0035] The numerical segments between the lowest and average values of the basic oil and gas-bearing area, and between the maximum and average values of the basic oil and gas-bearing area, are divided equally to obtain multiple basic oil and gas-bearing area values.
[0036] The numerical segments between the minimum and average basic reservoir thicknesses, and between the maximum and average basic reservoir thicknesses, are divided equally to obtain multiple basic reservoir thickness values.
[0037] The numerical segments between the minimum and average basic porosity values, and between the maximum and average basic porosity values, are divided into equal parts to obtain multiple basic oil and gas-bearing area values.
[0038] The numerical range between the lowest value of the basic oil and gas saturation and the average value of the basic oil and gas saturation, and the numerical range between the maximum value of the basic oil and gas saturation and the average value of the basic oil and gas saturation are divided equally to obtain multiple basic oil and gas saturation values.
[0039] The numerical segments between the lowest and average values of the basic volume coefficient, and between the maximum and average values of the basic volume coefficient, are divided equally to obtain multiple basic volume coefficient values.
[0040] Substituting the multiple basic oil and gas area values, the multiple basic reservoir thickness values, the multiple basic oil and gas area values, the multiple basic oil and gas saturation values, and the multiple basic volume coefficient values into the mineral reserves calculation model, multiple mineral reserves are obtained.
[0041] The mineral reserves are sorted in descending order of their numerical values to obtain the sorted mineral reserves.
[0042] Based on the sorted mineral reserves and the quantity of the mineral reserves, the probability of occurrence of the mineral reserves is obtained.
[0043] Based on the multiple mineral reserves and the probability of occurrence of the multiple mineral reserves, obtain a cross-plot of the mineral reserves and the probability of occurrence of the mineral reserves.
[0044] In an exemplary embodiment, obtaining a cross-plot of the mineral reserves and their probabilities of occurrence based on the plurality of mineral reserves and their occurrence probabilities includes:
[0045] Using the mineral reserves as the horizontal axis and the probability of occurrence of the mineral reserves as the vertical axis, a cross plot of the mineral reserves and the probability of occurrence of the mineral reserves is obtained using the Monte Carlo method.
[0046] The beneficial effects of the technical solutions provided in this application embodiment may include:
[0047] By drawing an intersection map of mineral reserves and mineral reserves calculation models to determine the probability of mineral reserves occurrence, and then using this intersection map to determine the equivalent mineral reserves of the target area, a method for obtaining equivalent mineral reserves is provided. Obtaining equivalent mineral reserves from the intersection map provides a basis for determining equivalent mineral reserves and ensures the accuracy of mineral reserves assessment. Attached Figure Description
[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0049] Figure 1 This is a flowchart of an embodiment of the method for equivalent determination of mineral reserves provided in this application;
[0050] Figure 2 An example diagram of an intersection drawing is shown. Detailed Implementation
[0051] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0052] Please refer to Figure 1 The diagram illustrates a flowchart of a method for equivalent determination of mineral reserves provided in one embodiment of this application. The method includes the following steps (101-103):
[0053] Step 101: Obtain mineral reserve parameters and mineral reserves calculation model for the target area.
[0054] Mineral reserve parameters are used to indicate the mineral reserves in a target area, and the mineral reserves calculation model is used to calculate the mineral reserves at various points in the target area. Optionally, the aforementioned mineral reserve parameters include the minimum basic oil and gas area, the minimum basic reservoir thickness, the minimum basic porosity, the minimum basic oil and gas saturation, the minimum basic volume factor, the average basic oil and gas area, the average basic reservoir thickness, the average basic porosity, the average basic oil and gas saturation, the average basic volume factor, the maximum basic oil and gas area, the maximum basic reservoir thickness, the maximum basic porosity, the maximum basic oil and gas saturation, and the maximum basic volume factor in the target area.
[0055] In this embodiment, before obtaining the equivalent mineral reserves of the target area, the staff acquires the mineral reserve parameters and a mineral reserve calculation model for the target area. Optionally, the staff can conduct a geological evaluation of the target area based on work experience or with the aid of geological surveying instruments, and obtain the mineral reserve parameters and a mineral reserve calculation model for the target area through this geological evaluation. For example, assume the formula for the mineral reserve calculation model is:
[0056] G X =0.1×A i ×H j ×φ k ×S m / B n ;
[0057] Among them, G x A represents the mineral reserves at point x. i H represents the oil and gas-bearing area value at point i. j φ represents the reservoir thickness at point j. k S represents the porosity value at point k. m B represents the oil and gas saturation value at point m. n This represents the volume coefficient value at point n.
[0058] Step 102: Based on the mineral reserve parameters and the mineral reserves calculation model, obtain the intersection chart of mineral reserves and the probability of mineral reserves occurring.
[0059] In this embodiment, after obtaining the aforementioned mineral reserve parameters and mineral reserves calculation model, the staff obtains a cross-plot of mineral reserves and their occurrence probabilities based on these parameters and the model. The cross-plot refers to an image that displays both types of data on the same graph.
[0060] Optionally, step 102 above includes the following steps:
[0061] 1. Divide the numerical range between the lowest and average values of the basic oil and gas area, and the numerical range between the highest and average values of the basic oil and gas area, into equal parts to obtain multiple basic oil and gas area values.
[0062] 2. Divide the numerical segment between the minimum value and the average value of the basic reservoir thickness, and the numerical segment between the maximum value and the average value of the basic reservoir thickness into equal parts to obtain multiple basic reservoir thickness values.
[0063] 3. Divide the numerical segment between the minimum and average basic porosity values, and the numerical segment between the maximum and average basic porosity values into equal parts to obtain multiple basic oil and gas-bearing area values.
[0064] 4. Divide the numerical range between the lowest and average values of the basic oil and gas saturation, and the numerical range between the highest and average values of the basic oil and gas saturation, into equal parts to obtain multiple basic oil and gas saturation values.
[0065] 5. Divide the numerical segment between the minimum value and the average value of the basic volume coefficient, and the numerical segment between the maximum value and the average value of the basic volume coefficient into equal parts to obtain multiple basic volume coefficient values.
[0066] 6. Substitute multiple basic oil and gas area values, multiple basic reservoir thickness values, multiple basic oil and gas area values, multiple basic oil and gas saturation values, and multiple basic volume coefficient values into the mineral reserves calculation model to obtain multiple mineral reserves.
[0067] 7. Sort the multiple mineral reserves in descending order of their numerical values to obtain the sorted mineral reserves.
[0068] 8. Based on the sorted mineral reserves and the quantity of each mineral reserve, obtain the probability of occurrence of each mineral reserve.
[0069] 9. Based on the multiple mineral reserves and the probability of occurrence of multiple mineral reserves, obtain the intersection chart of mineral reserves and the probability of occurrence of mineral reserves.
[0070] In this embodiment, after obtaining the aforementioned mineral reserve parameters and mineral abundance calculation model, the staff will divide the numerical range between the minimum and average values of the basic oil and gas-bearing area into N equal parts, obtaining N-1 data points. Similarly, the staff will divide the numerical range between the maximum and average values of the basic oil and gas-bearing area into N equal parts, obtaining N-1 data points in total. These include the minimum, average, and maximum values of the basic oil and gas-bearing area, resulting in a total of 2N+1 data points for the basic oil and gas-bearing area. Optionally, in this case, the aforementioned A... i In the range i∈[1,2N+1]. The range between the minimum and average basic reservoir thickness is divided into N equal parts, yielding N-1 data points. Similarly, the range between the maximum and average basic reservoir thickness is divided into N equal parts, yielding N-1 data points in total. This includes the minimum, average, and maximum basic reservoir thickness, resulting in a total of 2N+1 data points for the basic reservoir thickness. Optionally, in this case, the above H... j Let j∈[1,2N+1]. Divide the range between the minimum and average basic porosity values into N equal parts, obtaining N-1 data points. Similarly, divide the range between the maximum and average basic porosity values into N equal parts, obtaining N-1 data points in total. This includes the minimum, average, and maximum basic porosity values, resulting in a total of 2N+1 basic porosity data points. Optionally, in this case, the aforementioned φ... k In the case where k∈[1,2N+1]. The range between the minimum and average basic oil and gas saturation values is divided into N equal parts, yielding N-1 data points. Similarly, the range between the maximum and average basic oil and gas saturation values is divided into N equal parts, yielding N-1 data points in total. These include the minimum, average, and maximum basic oil and gas saturation values, resulting in a total of 2N+1 basic oil and gas saturation data points. Optionally, in this case, the aforementioned S... m In the given condition, m ∈ [1, 2N+1]. The range between the minimum and average values of the basic volume coefficient is divided into N equal parts, yielding N-1 data points. Similarly, the range between the maximum and average values of the basic volume coefficient is divided into N equal parts, yielding N-1 data points in total. This includes the minimum, average, and maximum values of the basic volume coefficient, resulting in a total of 2N+1 data points for the basic volume coefficient. Optionally, in this case, the aforementioned B... n In the case of n∈[1,2N+1].
[0071] Optionally, in this embodiment, after segmenting the aforementioned data, the staff uses multiple mineral reserves as the horizontal axis and the probability of occurrence of multiple mineral reserves as the vertical axis, and obtains a cross-plot of mineral reserves and their occurrence probabilities using the Monte Carlo method. For example, the cross-plot is as follows: Figure 2 As shown.
[0072] For example, staff obtain the mineral reserve value G for each point according to the formula of the above-mentioned mineral reserve calculation model. x The calculation results are arranged in descending order, and the mineral reserves (GG) are renamed according to the sorting order. x GG1 represents the maximum mineral reserve value, followed by GG2, GG3, and so on, with the minimum mineral reserve value being GG. min min=(2N+1) 5 At this point, the probability f of the mineral reserves occurring... x for:
[0073] f x =x / (2N+1) 5 ;
[0074] Where x is the index of the data point whose mineral reserves are arranged in descending order, and there are a total of (2N+1) such data points. 5 There are n data points, x∈[1,(2N+1)]. 5 ];f x Let x represent the probability of mineral deposits occurring at point x, where x∈[1,(2N+1)]. 5 ].
[0075] Step 103: Based on the intersection map, obtain the equivalent mineral reserves of the target area.
[0076] In this embodiment of the application, after obtaining the aforementioned intersection map, the staff obtains the equivalent mineral reserves of the target area based on the intersection map. The equivalent mineral reserves include the equivalent proven reserves of controlled reserves, the equivalent proven reserves of predicted reserves, and the equivalent proven reserves of resources.
[0077] In summary, the technical solution provided in this application involves drawing an intersection map of the probability of mineral reserves occurrence using mineral reserve parameters and a mineral reserves calculation model. Based on this intersection map, the equivalent mineral reserves of the target area are determined, providing a method for obtaining equivalent mineral reserves. This method obtains equivalent mineral reserves from the interactive map and provides a basis for determining non-equivalent mineral reserves, ensuring the accuracy of mineral reserves assessment.
[0078] The following describes the specific method for obtaining equivalent mineral reserves based on intersection maps in this application.
[0079] In an exemplary embodiment, step 103 above includes the following steps:
[0080] 1. Obtain the probability of occurrence of proven reserves, the probability of occurrence of controlled reserves, the probability of occurrence of predicted reserves, and the probability of occurrence of resources in the target area.
[0081] In this embodiment, before obtaining the equivalent mineral reserves of the target area from the intersection map, the staff obtains the probability of the occurrence of proven reserves, the probability of the occurrence of controlled reserves, the probability of the occurrence of predicted reserves, and the probability of the occurrence of resources in the target area. Proven reserves refer to reserves that, after detailed exploration, can be mined using existing technology under current and anticipated local economic conditions. Controlled reserves refer to reserves calculated during the evaluation exploration process after obtaining industrial oil and gas flow from a trap, with the aim of establishing proven reserves. Predicted reserves refer to reserves that are expected to be exploitable under uncertain technical conditions; it is an incremental category, and predicted reserves refer to some supplementary reserves, which are less certain to be exploitable than potential reserves. Resources refer to a portion of the proven mineral resources and potential mineral resources.
[0082] Optionally, in this embodiment of the application, staff can determine the probability of occurrence of proven reserves, the probability of occurrence of controlled reserves, the probability of occurrence of predicted reserves, and the probability of occurrence of resource quantity based on the reliability of the above-mentioned mineral reserve parameters.
[0083] 2. Based on the probability of occurrence of proven reserves, the probability of occurrence of controlled reserves, the probability of occurrence of predicted reserves, and the probability of occurrence of resources, and in conjunction with the intersection map, obtain the equivalent mineral reserves of the target area.
[0084] In this embodiment of the application, after obtaining the probability of occurrence of proven reserves, the probability of occurrence of controlled reserves, the probability of occurrence of predicted reserves, and the probability of occurrence of resources, the staff obtains the equivalent mineral reserves of the target area based on the probability of occurrence of proven reserves, the probability of occurrence of controlled reserves, the probability of occurrence of predicted reserves, and the probability of occurrence of resources, combined with the intersection map.
[0085] Optionally, staff can obtain the proven reserves, controlled reserves, predicted reserves, and resource quantities from the aforementioned cross-plot based on the probability of the occurrence of proven reserves, controlled reserves, predicted reserves, and resource quantities. For example, in conjunction with reference... Figure 2 Assuming that after conducting geological assessments, staff determine, based on the reliability of mineral reserve parameters and their own work experience, that the probability of proven reserves is 95%, the probability of controlled reserves is 80%, the probability of predicted reserves is 65%, and the probability of resource quantity is 50%, then according to... Figure 2 The intersection map obtained from the map can be used to read the proven reserves y.t =15.26 million tons, controlled reserves y k =19.41 million tons, predicted reserves y y = 22.15 million tons, resource quantity y z = 24.52 million tons.
[0086] Optionally, after obtaining proven reserves, controlled reserves, predicted reserves, and resources, staff can obtain the equivalent mineral reserves of the target area based on these reserves. The equivalent mineral reserves include the equivalent proven reserves of controlled reserves, the equivalent proven reserves of predicted reserves, and the equivalent proven reserves of resources.
[0087] In this embodiment of the application, the staff can obtain the mineral reserves with a 5% probability of occurrence from the above-mentioned intersection map and determine it as the maximum mineral reserves. For example, from... Figure 2 As can be seen from the intersection chart, the maximum mineral reserve value y max = 35.09 million tons; The mineral reserves with a 95% probability of occurrence are obtained from the above intersection charts and determined as the minimum mineral reserves. For example, from... Figure 2 As can be seen from the intersection chart, the minimum mineral reserve value y min =15.26 million tons; then, based on the maximum mineral reserves, minimum mineral reserves, proven reserves, controlled reserves, predicted reserves and resources, the ratio coefficient of mineral reserves is obtained; and based on the ratio coefficient, proven reserves, controlled reserves, predicted reserves and resources, the equivalent mineral reserves of the target area are obtained.
[0088] Among them, the above ratio coefficients include the ratio coefficients of proven reserves, the ratio coefficients of controlled reserves, the ratio coefficients of predicted reserves, and the ratio coefficients of resource quantity.
[0089] Optionally, when obtaining the aforementioned ratio coefficients, staff may obtain the ratio coefficient of proven reserves based on the maximum mineral reserves, minimum mineral reserves, and proven reserves. For example, the ratio coefficient 'a' of proven reserves... t =(y max -y t ) / (y max -y min Based on the maximum mineral reserves, minimum mineral reserves, and controlled reserves, obtain the ratio coefficient of controlled reserves. For example, the ratio coefficient 'a' of controlled reserves is... k =(y max -y k ) / (y max -y min Based on the maximum mineral reserves, minimum mineral reserves, and predicted reserves, obtain the ratio coefficient of predicted reserves. For example, the ratio coefficient 'a' of predicted reserves is... y=(y max -y y ) / (y max -y min Based on the maximum mineral reserves, minimum mineral reserves, and resource quantity, obtain the resource quantity ratio coefficient. For example, the predicted reserve ratio coefficient 'a' is... z =(y max -y z ) / (y max -y min ).by Figure 2 Taking the intersection chart in the middle as an example, the ratio coefficient 'a' of proven reserves can be determined. t =(y max -y t ) / (y max -y min )=(3509-1526) / (3509-1526)=1, the ratio coefficient a of the controlled reserves k =(y max -y k ) / (y max -y min )=(3509-1941) / (3509-1526)=0.79, the ratio coefficient of predicted reserves a y =(y max -y y ) / (y max -y min )=(3509-2215) / (3509-1526)=0.65, the ratio coefficient of predicted reserves a z =(y max -y z ) / (y max -y min = (3509-2452) / (3509-1526) = 0.53.
[0090] Optionally, after determining the aforementioned ratio coefficients, when obtaining the equivalent mineral reserves of the target area, staff can obtain the equivalent proven reserves of the controlled reserves based on the ratio coefficients of the controlled reserves and the ratio coefficients of the proven reserves. For example, the equivalent proven reserves of the controlled reserves G... kt =G k ×a k / a t Based on the ratio coefficient of predicted reserves and the ratio coefficient of proven reserves, the equivalent proven reserves of the predicted reserves are obtained. For example, the equivalent proven reserves G of the predicted reserves are... yt =G y ×a y / a tBased on the ratio coefficient of resource quantity and the ratio coefficient of proven reserves, the equivalent proven reserves of resource quantity are obtained. For example, the equivalent proven reserves of resource quantity G zt =G z ×a z / a t .
[0091] It should be noted that the above description of the technical solution of this application is from the perspective of the staff. In actual use, the above steps can also be performed by computer equipment or intelligent robots. This application embodiment does not limit this.
[0092] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A method for equivalent determination of mineral reserves, characterized in that, The method includes: Obtain mineral reserve parameters and a mineral reserves calculation model for the target area; wherein, the mineral reserve parameters are used to indicate the mineral storage status of the target area, and the mineral reserves calculation model is used to calculate the mineral reserves at each point in the target area; Based on the mineral reserve parameters and the mineral reserves calculation model, obtain a cross-plot of the mineral reserves and the probability of their occurrence. Based on the intersection map, the equivalent mineral reserves of the target area are obtained; wherein, the equivalent mineral reserves include the equivalent proven reserves of controlled reserves, the equivalent proven reserves of predicted reserves, and the equivalent proven reserves of resources. The step of obtaining a cross-plot of mineral reserves and their occurrence probabilities based on the mineral reserve parameters and the mineral potential calculation model includes: The numerical range between the lowest and average values of the basic oil and gas-bearing area, and the numerical range between the highest and average values of the basic oil and gas-bearing area, are divided equally to obtain multiple basic oil and gas-bearing area values. The numerical segment between the minimum and average basic reservoir thickness, and the numerical segment between the maximum and average basic reservoir thickness are divided equally to obtain multiple basic reservoir thickness values. The numerical segment between the minimum basic porosity and the average basic porosity, and the numerical segment between the maximum basic porosity and the average basic porosity, are divided into equal parts to obtain multiple basic porosity values. The numerical range between the lowest basic oil and gas saturation value and the average basic oil and gas saturation value, and the numerical range between the highest basic oil and gas saturation value and the average basic oil and gas saturation value, are divided equally to obtain multiple basic oil and gas saturation values. The numerical segments between the lowest and average values of the basic volume coefficient, and between the maximum and average values of the basic volume coefficient, are divided equally to obtain multiple basic volume coefficient values. Substituting the multiple basic oil and gas area values, the multiple basic reservoir thickness values, the multiple basic oil and gas area values, the multiple basic oil and gas saturation values, and the multiple basic volume coefficient values into the mineral reserves calculation model, multiple mineral reserves are obtained. The mineral reserves are sorted in descending order of their numerical values to obtain the sorted mineral reserves. Based on the sorted mineral reserves and the quantity of the mineral reserves, the probability of occurrence of the mineral reserves is obtained. Based on the multiple mineral reserves and the probability of occurrence of the multiple mineral reserves, obtain a cross-plot of the mineral reserves and the probability of occurrence of the mineral reserves.
2. The method according to claim 1, characterized in that, The step of obtaining the equivalent mineral reserves of the target area based on the intersection map includes: The probability of the occurrence of proven reserves, the probability of the occurrence of controlled reserves, the probability of the occurrence of predicted reserves, and the probability of the occurrence of resources in the target area are obtained. Based on the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity, combined with the intersection map, the equivalent mineral reserves of the target area are obtained.
3. The method according to claim 2, characterized in that, The acquisition of the probability of occurrence of proven reserves, the probability of occurrence of controlled reserves, the probability of occurrence of predicted reserves, and the probability of occurrence of resources in the target area includes: Based on the reliability of the mineral reserve parameters, the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity are determined.
4. The method according to claim 2, characterized in that, The step of obtaining the equivalent mineral reserves of the target area based on the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity, combined with the intersection map, includes: Based on the probability of occurrence of the proven reserves, the probability of occurrence of the controlled reserves, the probability of occurrence of the predicted reserves, and the probability of occurrence of the resource quantity, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity are obtained from the intersection map. Based on the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity, the equivalent mineral reserves of the target area are obtained; wherein, the equivalent mineral reserves include the equivalent proven reserves of the controlled reserves, the equivalent proven reserves of the predicted reserves, and the equivalent proven reserves of the resource quantity.
5. The method according to claim 4, characterized in that, The step of obtaining the equivalent mineral reserves of the target area based on the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity includes: The mineral reserves with a 5% occurrence probability are obtained from the intersection map and determined as the maximum mineral reserves. The mineral reserves with a 95% probability of occurrence are obtained from the intersection map and determined as the minimum mineral reserves. The ratio coefficient of the mineral reserves is obtained based on the maximum mineral reserves, the minimum mineral reserves, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity. Based on the ratio coefficient, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity, the equivalent mineral reserves of the target area are obtained.
6. The method according to claim 5, characterized in that, The step of obtaining the ratio coefficient of the mineral reserves based on the maximum mineral reserves, the minimum mineral reserves, the proven reserves, the controlled reserves, the predicted reserves, and the resources includes: Based on the maximum mineral reserves, the minimum mineral reserves, and the proven reserves, obtain the ratio coefficient of the proven reserves; Based on the maximum mineral reserves, the minimum mineral reserves, and the controlled reserves, obtain the ratio coefficient of the controlled reserves; Based on the maximum mineral reserves, the minimum mineral reserves, and the predicted reserves, obtain the ratio coefficient of the predicted reserves; The ratio coefficient of the resource quantity is obtained based on the maximum mineral reserves, the minimum mineral reserves, and the resource quantity.
7. The method according to claim 5, characterized in that, The ratio coefficients include the ratio coefficients for the proven reserves, the ratio coefficients for the controlled reserves, the ratio coefficients for the predicted reserves, and the ratio coefficients for the resource quantity; The process of obtaining the equivalent mineral reserves of the target area based on the ratio coefficient, the proven reserves, the controlled reserves, the predicted reserves, and the resource quantity includes: Based on the ratio coefficient of the controlled reserves and the ratio coefficient of the proven reserves, the equivalent proven reserves of the controlled reserves are obtained; Based on the ratio coefficient of the predicted reserves and the ratio coefficient of the proven reserves, the equivalent proven reserves of the predicted reserves are obtained. Based on the ratio coefficient of the resource quantity and the ratio coefficient of the proven reserves, the equivalent proven reserves of the resource quantity are obtained.
8. The method according to claim 1, characterized in that, The step of obtaining a cross-plot of the mineral reserves and their occurrence probabilities based on the multiple mineral reserves and their occurrence probabilities includes: Using the mineral reserves as the horizontal axis and the probability of occurrence of the mineral reserves as the vertical axis, a cross plot of the mineral reserves and the probability of occurrence of the mineral reserves is obtained using the Monte Carlo method.