Method and device for calculating change in geological reserves based on influence of parameter change

Abstract

The application discloses a kind of based on parameter change influence's geological reserves change calculation method and device, it is related to oil and gas field exploration and development technical field, it can be used to effectively accurate analysis each parameter change brings to the influence contribution of geological reserves change.The main technical scheme of the application is: obtaining the parameter value corresponding to different reserves parameters before and after re-calculation, for calculating the geological reserves before and after re-calculation and further re-calculation the total change of geological reserves before and after re-calculation, then according to reserves parameter and corresponding parameter value before and after re-calculation, the weight corresponding to different reserves parameters is calculated, so as to further utilize the weight corresponding to different reserves parameters and the total change of geological reserves, determine the change of geological reserves in this total change due to the parameter value change of each reserves parameter.The application is mainly applied to quantitatively calculate the influence contribution brought by different reserves parameter change to geological reserves change.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field exploration and development technology, and in particular to a method and apparatus for calculating geological reserve changes based on the influence of parameter variations. Background Technology

[0002] As oilfield exploration and development continue to deepen, the understanding of geological reserves is also constantly changing. Geological reserve research is the foundation for efficient oilfield development, and it is essential to explore the impact and contribution of changes in various parameters of geological reserves on changes in geological reserves.

[0003] Changes in geological reserves are the result of the combined effects of changes in multiple parameters. When analyzing the contribution of each parameter change to changes in geological reserves, it is necessary to divide the changes in geological reserves into single factors. Currently, the most commonly used division method by domestic reserves researchers is as follows: when dividing geological reserves, for items containing only a single parameter, the entire amount is allocated to that single parameter; for items containing multiple parameters, the amount is evenly distributed among the parameters by dividing by the number of parameters, and then the impact of each parameter change on the changes in geological reserves is obtained by summing.

[0004] However, the average division based on the number of parameters is only an approximate result and does not take into account the impact of the relative magnitude of the changes between parameters on the increase in geological reserves. Such data is difficult to use to effectively and accurately analyze the contribution of changes in each parameter to changes in geological reserves, and it is also not conducive to geological reserve sensitivity analysis and geological reserve increment analysis. Summary of the Invention

[0005] In view of this, the present invention provides a method and apparatus for calculating geological reserve changes based on the influence of parameter changes. The main purpose is to calculate the changes in geological reserves caused by different parameter changes, and then to effectively and accurately analyze the contribution of each parameter change to the geological reserve changes, which is beneficial to geological reserve sensitivity analysis and geological reserve increment analysis.

[0006] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0007] The first aspect of this application provides a method for calculating geological reserve changes based on the influence of parameter variations, the method comprising:

[0008] Obtain the first parameter value corresponding to the reserve parameter before recalculation and the second parameter value corresponding to the reserve parameter after recalculation, wherein the reserve parameter is at least one;

[0009] Based on the first parameter value, calculate the first geological reserves corresponding to the recalculation;

[0010] Based on the second parameter value, calculate the corresponding second geological reserves after recalculation;

[0011] Based on the first geological reserves and the second geological reserves, determine the total change in geological reserves between before and after the recalculation;

[0012] Based on the first parameter value, the second parameter value, and the number of the reserve parameters, calculate the weights corresponding to different reserve parameters;

[0013] Based on the weights corresponding to the different reserve parameters and the total change in geological reserves, the change in geological reserves corresponding to each reserve parameter is determined.

[0014] In some modified embodiments of the first aspect of this application, after obtaining the first parameter value corresponding to the reserve parameter before recalculation and the second parameter value corresponding to the reserve parameter after recalculation, the method further includes:

[0015] For the same reserve parameter, if the value of the second parameter is greater than or equal to the value of the first parameter, then the reserve parameter is determined as a positive parameter.

[0016] For the same reserve parameter, if the value of the second parameter is less than the value of the first parameter, then the reserve parameter is determined to be a negative parameter.

[0017] Count the number of positive parameters and the number of negative parameters.

[0018] In some modified embodiments of the first aspect of this application, the step of calculating the weights corresponding to different reserve parameters based on the first parameter value, the second parameter value, and the number of reserve parameters includes:

[0019] Based on the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, a first weight corresponding to each positive parameter is calculated using a preset first formula;

[0020] Based on the number of negative parameters, the first parameter value and the second parameter value corresponding to the negative parameters, a second weight corresponding to each negative parameter is calculated using a preset second formula;

[0021] The weight corresponding to each of the reserve parameters is determined based on the first weight and the second weight.

[0022] In some modified embodiments of the first aspect of this application, the first preset formula used is:

[0023]

[0024] Among them, E jLet x1 be the weight of the j-th positive parameter, m be the number of the positive parameters, x1 be the first parameter value of the positive parameter before recalculation, and x2 be the second parameter value of the positive parameter after recalculation.

[0025] In some modified embodiments of the first aspect of this application, the second preset formula is as follows:

[0026]

[0027] Among them, E k y1 is the weight of the k-th negative parameter, n is the number of negative parameters, y1 is the first parameter value of the negative parameter before recalculation, and y2 is the second parameter value of the negative parameter after recalculation.

[0028] In some modified embodiments of the first aspect of this application, the method further includes:

[0029] Based on the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, and the first geological reserves, a preset third formula is used to calculate the first change amount corresponding to the change in geological reserves caused by the positive parameters.

[0030] The third preset formula used is:

[0031]

[0032] Among them, Here, m represents the number of positive parameters, and in the table below, i = 1 indicates the first parameter, i = 2 indicates the second parameter, and ΔN... + The geological reserve change affected by the positive parameter is identified as the first change, 10. 4 t.

[0033] Based on the total change in geological reserves between before and after the recalculation, and the first change, the second change corresponding to the impact of the negative parameter on the change in geological reserves is determined.

[0034] In some modified embodiments of the first aspect of this application, determining the geological reserve change corresponding to each of the reserve parameters based on the weights corresponding to different reserve parameters and the total change in geological reserves includes:

[0035] Based on the first change and the first weight, calculate the geological reserve change corresponding to each of the positive parameters;

[0036] Based on the second change and the second weight, calculate the geological reserve change corresponding to each negative parameter.

[0037] The second aspect of this application provides a method for calculating geological reserve changes based on the influence of parameter variations, the method comprising:

[0038] An acquisition unit is used to acquire a first parameter value corresponding to the reserve parameter before recalculation and a second parameter value corresponding to the reserve parameter after recalculation, wherein the reserve parameter is at least one;

[0039] The first calculation unit is used to calculate the first geological reserves corresponding to the recalculation based on the first parameter value.

[0040] The first calculation unit is further configured to calculate the second geological reserves corresponding to the recalculation based on the second parameter value;

[0041] The first determining unit is used to determine the total change in geological reserves between before and after recalculation based on the first geological reserves and the second geological reserves.

[0042] The second calculation unit is also used to calculate the weights corresponding to different storage parameters based on the first parameter value, the second parameter value, and the number of storage parameters.

[0043] The second determining unit is further configured to determine the geological reserve change corresponding to each of the reserve parameters based on the weights corresponding to the different reserve parameters and the total change in the geological reserves.

[0044] In some modified embodiments of the second aspect of this application, the apparatus further includes:

[0045] The third determining unit is used to determine the storage parameter as a positive parameter if the value of the second parameter is greater than or equal to the value of the first parameter for the same storage parameter.

[0046] The third determining unit is further configured to, for the same storage parameter, if the value of the second parameter is less than the value of the first parameter, determine the storage parameter as a negative parameter;

[0047] The statistics unit is used to count the number of positive parameters and the number of negative parameters.

[0048] In some modified embodiments of the second aspect of this application, the third computing unit includes:

[0049] The calculation module is used to calculate the first weight corresponding to each positive parameter according to the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, using a preset first formula;

[0050] The calculation module is further configured to calculate the second weight corresponding to each negative parameter using a preset second formula based on the number of negative parameters and the first and second parameter values ​​corresponding to the negative parameters.

[0051] The determining module is used to determine the weight corresponding to each of the storage parameters based on the first weight and the second weight.

[0052] In some modified embodiments of the second aspect of this application, the first preset formula used is:

[0053]

[0054] Among them, E j Let x1 be the weight of the j-th positive parameter, m be the number of the positive parameters, x1 be the first parameter value of the positive parameter before recalculation, and x2 be the second parameter value of the positive parameter after recalculation.

[0055] In some modified embodiments of the second aspect of this application, the second preset formula is as follows:

[0056]

[0057] Among them, E k y1 is the weight of the k-th negative parameter, n is the number of negative parameters, y1 is the first parameter value of the negative parameter before recalculation, and y2 is the second parameter value of the negative parameter after recalculation.

[0058] In some modified embodiments of the second aspect of this application, the apparatus further includes:

[0059] The third calculation unit is used to calculate the first change amount corresponding to the change in geological reserves caused by the positive parameters, based on the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, and the first geological reserves, using a preset third formula.

[0060] The third preset formula used is:

[0061]

[0062] Among them, Here, m represents the number of positive parameters, and in the table below, i = 1 indicates the first parameter, i = 2 indicates the second parameter, and ΔN... + The geological reserve change affected by the positive parameter is identified as the first change, 10. 4 t;

[0063] The fourth determining unit is used to determine the second change corresponding to the change in geological reserves caused by the negative parameter, based on the total change in geological reserves between the recalculation and the first change.

[0064] In some modified embodiments of the second aspect of this application, the second determining unit includes:

[0065] The calculation module is used to calculate the geological reserve change corresponding to each of the positive parameters based on the first change amount and the first weight.

[0066] The calculation module is further configured to calculate the geological reserve change corresponding to each negative parameter based on the second change amount and the second weight.

[0067] A third aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described above for calculating geological reserve changes based on the influence of parameter variations.

[0068] A fourth aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the calculation method for geological reserve changes based on the influence of parameter variations.

[0069] By employing the above-described technical solution, the technical solution provided by the present invention has at least the following advantages:

[0070] This invention provides a method and apparatus for calculating geological reserve changes based on the influence of parameter variations. The invention obtains parameter values ​​corresponding to different reserve parameters before and after recalculation, which are used to calculate the geological reserves before and after recalculation, and further calculate the total change in geological reserves before and after recalculation. Then, based on the reserve parameters and their corresponding parameter values ​​before and after recalculation, the weights corresponding to different reserve parameters are calculated. This allows for further utilization of the weights of different reserve parameters and the total change in geological reserves to determine the geological reserve change caused by the change in the parameter value of each reserve parameter within this total change. Compared to existing technologies, this invention solves the technical problem that existing segmentation methods cannot effectively provide the contribution of parameter variations to geological reserve changes. This invention can calculate the changes in geological reserves based on different parameter variations, and can be used to effectively and accurately analyze the contribution of each parameter variation to geological reserve changes, which is beneficial for geological reserve sensitivity analysis and geological reserve increment analysis.

[0071] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0072] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0073] Figure 1 A flowchart illustrating a method for calculating geological reserve changes based on the influence of parameter variations, provided as an embodiment of the present invention;

[0074] Figure 2 A flowchart illustrating another method for calculating geological reserve changes based on the influence of parameter variations, provided in an embodiment of the present invention;

[0075] Figure 3 A block diagram of a calculation device for geological reserve changes based on the influence of parameter variations, provided for an embodiment of the present invention;

[0076] Figure 4 A block diagram of another calculation device for geological reserve changes based on the influence of parameter changes, provided as an embodiment of the present invention. Detailed Implementation

[0077] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0078] This invention provides a method for calculating geological reserve changes based on the influence of parameter variations, such as... Figure 1 As shown, this method calculates the change in geological reserves caused by the change in the parameter value of each reserve parameter in the total change in geological reserves before and after recalculation. The specific steps provided in this embodiment are as follows:

[0079] 101. Obtain the first parameter value corresponding to the reserve parameter before recalculation and the second parameter value corresponding to the reserve parameter after recalculation.

[0080] Among them, there can be one or more reserve parameters. Based on geological research, the reserve parameters before and after recalculation can be determined using drilling, logging, well logging and seismic data of the oil field. These parameters include: oil-bearing area, effective thickness of oil layer, porosity, oil saturation, reciprocal of volume factor and surface crude oil density.

[0081] In this embodiment of the invention, the parameter values ​​of the same reserve parameter may be the same or different before and after recalculation. In order to clearly distinguish them, the parameter value before recalculation can be defined as "first parameter value" and the parameter value after recalculation can be defined as "second parameter value".

[0082] Specifically, Table 1 shows the relevant parameters and corresponding parameter values ​​of the reserves before and after the recalculation.

[0083] Table 1

[0084] Reserve parameters (units) before recalculation After recalculation <![CDATA[Oil-bearing area (km 2 )]]> 1.180 1.430 Effective oil layer thickness (m) 6.000 7.100 Porosity (%) 32.200 29.900 Oil saturation (f) 0.731 0.651 Volume index (f) 1.159 1.159 <![CDATA[Ground crude oil density (t / m 3 )]]> 0.918 0.916

[0085] It should be noted that, according to the "Specification for Estimating Petroleum and Natural Gas Reserves" recorded in the "Geological and Mineral Resources Industry Standard of the People's Republic of China" (DZ / T 0217-2020), there are five types of reserve estimation scenarios during the process from the discovery of an oil (gas) field to its abandonment, based on changes in geological data, engineering technology, and technical and economic conditions: new reserves, recalculation, verification, calibration, and settlement. The following terms and related definitions are extracted from this specification:

[0086] Newly added: The reserves estimated for the first time in an oil (gas) field, block, or stratum are newly added; Recalculation: The recalculation is the estimation of reserves after new proven reserves have been added and additional work has been done, or after the completion of a production well; All subsequent reserves estimates during the development and production process after the recalculation are accounting; During the development and production process, the recalculation of proven technically recoverable reserves and proven economically recoverable reserves up to the end of the previous year based on development dynamic data and economic conditions is called recoverable reserves calibration, or simply calibration; Reserve estimates made when an oil (gas) field is abandoned or temporarily closed are called settlement.

[0087] In this embodiment of the invention, the parameter values ​​of each reserve parameter obtained before and after recalculation are used as an example to complete the operation of calculating the geological reserve change corresponding to each reserve parameter. However, it should be noted that, in addition, the method provided in this embodiment of the invention can also be executed based on the parameter values ​​of each reserve parameter obtained before and after "recalculation" and the parameter values ​​of each reserve parameter obtained before and after "settlement" to calculate the geological reserve change corresponding to each reserve parameter.

[0088] Furthermore, in the process of an oil (gas) field from discovery to abandonment, these five scenarios correspond to different processing stages. The method provided in this embodiment of the invention (i.e., calculating the geological reserve change corresponding to each reserve parameter) can be implemented based on each processing stage. Therefore, the method provided in this embodiment of the invention can be executed once or multiple times. In the case of multiple executions, the predicted geological reserve change corresponding to each reserve parameter at different processing stages can be calculated (i.e., predicting the contribution of each parameter change to the geological reserve change). Based on this, using the results of multiple predictions, dynamic analysis data for a target oil field can be constructed, which is more conducive to geological reserve sensitivity analysis and geological reserve increment analysis.

[0089] 102. Based on the first parameter value, calculate the first geological reserves corresponding to the recalculation.

[0090] 103. Based on the second parameter value, calculate the corresponding second geological reserves after recalculation.

[0091] 104. Based on the first and second geological reserves, determine the total change in geological reserves between before and after the recalculation.

[0092] In this embodiment of the invention, steps 102-104 are explained. In this embodiment of the invention, the first geological reserve before recalculation and the second geological reserve after recalculation are calculated according to the volumetric method, using the following formula (1):

[0093] N i =A i h i φ i S i ρ i B′ i Formula (1);

[0094] Where N represents geological reserves, 10 4 t; A represents the oil-bearing area, km² 2 h represents the effective thickness of the oil layer, in meters; φ represents porosity, f; S represents the initial oil saturation, in percent; ρ represents the density of crude oil at the surface, in tons per cubic meter of water. 3 B′ represents the reciprocal of the formation crude oil volume factor, f; when i = 1, it represents before recalculation, and when i = 2, it represents after recalculation.

[0095] Therefore, the expression for the total change in geological reserves before and after the recalculation is:

[0096] ΔN=N2-N1 Formula (2);

[0097] Where ΔN represents the total change in geological reserves, 10 4 t.

[0098] 105. Based on the first parameter value, the second parameter value, and the corresponding number of reserve parameters, calculate the weights corresponding to different reserve parameters.

[0099] 106. Based on the weights corresponding to different reserve parameters and the total change in geological reserves, determine the change in geological reserves corresponding to each reserve parameter.

[0100] In this embodiment of the invention, steps 105-106 are explained. After calculating the total change in geological reserves before and after recalculation, this embodiment of the invention further calculates the weights corresponding to different reserves parameters based on the number of reserves parameters and the first and second parameter values ​​of the reserves parameters before and after recalculation. These weights essentially indicate the influence and contribution of the changes in the parameter values ​​of different reserves parameters to the changes in geological reserves. Thus, the change in geological reserves corresponding to each reserves parameter in the total change in geological reserves is further calculated based on the weights.

[0101] This invention provides a method for calculating geological reserve changes based on the influence of parameter variations. The method involves obtaining parameter values ​​corresponding to different reserve parameters before and after recalculation, using these values ​​to calculate the geological reserves before and after recalculation, and further calculating the total change in geological reserves before and after recalculation. Then, based on the reserve parameters and their corresponding parameter values ​​before and after recalculation, weights corresponding to different reserve parameters are calculated. This allows for further utilization of the weights of different reserve parameters and the total change in geological reserves to determine the geological reserve change resulting from the change in the parameter value of each reserve parameter within this total change. Compared to existing technologies, this method solves the technical problem that existing segmentation methods struggle to effectively provide the contribution of parameter variations to geological reserve changes. This invention can calculate the changes in geological reserves based on different parameter variations, enabling effective and accurate analysis of the contribution of each parameter variation to geological reserve changes. This is beneficial for geological reserve sensitivity analysis and geological reserve increment analysis.

[0102] To provide a more detailed explanation of the above embodiments, this invention also provides another method for calculating geological reserve changes based on the influence of parameter variations, such as... Figure 2 As shown, this method is a detailed explanation and supplementary explanation of the above embodiments. The specific steps provided in this embodiment are as follows:

[0103] 201. Obtain the first parameter value corresponding to the reserve parameter before recalculation and the second parameter value corresponding to the reserve parameter after recalculation.

[0104] In this embodiment of the invention, the explanation of this step is as described in step 101, and will not be repeated here.

[0105] 202. The reserve parameters are classified into positive parameters and negative parameters.

[0106] In this embodiment of the invention, the reserve parameters are classified according to their impact on the changes in geological reserves before and after recalculation. Specifically, the specific implementation method for classifying the reserve parameters includes the following:

[0107] For the same reserve parameter, if its second parameter value is greater than or equal to the first parameter value, then the reserve parameter is determined as a positive parameter; however, if its second parameter value is less than the first parameter value, then the reserve parameter is determined as a negative parameter; finally, the number of positive parameters and the number of negative parameters are counted.

[0108] 203. Based on the first parameter value, calculate the first geological reserves corresponding to the recalculation.

[0109] 204. Based on the second parameter value, calculate the corresponding second geological reserves after recalculation.

[0110] 205. Based on the first and second geological reserves, determine the total change in geological reserves between before and after the recalculation.

[0111] In this embodiment of the invention, the explanation of steps 203-205 is the same as that of steps 102-104, and will not be repeated here.

[0112] 206. Calculate the first change in geological reserves corresponding to the positive influence of parameters on geological reserves from the total change in geological reserves, and calculate the second change corresponding to the negative influence of parameters on geological reserves.

[0113] In this embodiment of the invention, the reserve parameters are classified into positive parameters and negative parameters according to step 202. Then, based on the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, and the first geological reserves before recalculation, the first change amount corresponding to the change in geological reserves caused by the positive parameters is calculated using a preset formula. Specifically, the following formula (3) is used, and an exemplary explanation is given below:

[0114] Let the positive parameter be Where m is the number of positive parameters and the number of negative parameters is... n is the number of negative parameters. The expression for the change in geological reserves affected by positive parameters is:

[0115]

[0116] Where, ΔN + The geological reserve changes affected by positive parameters are denoted as "first change," 10 4 t.

[0117] Furthermore, based on the total change in geological reserves before and after the recalculation, and the first change, the second change corresponding to the negative parameter's influence on geological reserves can be determined, which is the change in geological reserves influenced by the negative parameter. Specifically, the following formula (4) is used, and an example explanation is given below:

[0118] The expression for the change in geological reserves due to the influence of negative parameters is:

[0119] ΔN - =ΔN-ΔN + Formula (4);

[0120] In the formula ΔN - Changes in geological reserves influenced by negative parameters are denoted as "secondary change," 10 4 t.

[0121] 207. Based on the first parameter value, the second parameter value, and the number of corresponding reserve parameters, calculate the weights corresponding to different reserve parameters, including: the first weight corresponding to positive parameters and the second weight corresponding to negative parameters.

[0122] Based on the number of positive parameters and the first and second parameter values ​​corresponding to the positive parameters, the first weight corresponding to each positive parameter is calculated using a preset formula. Specifically, formula (5) is used, and an example explanation is given below.

[0123] The expression for calculating the weight of the j-th positive parameter is:

[0124]

[0125] Among them, E j Let x1 be the weight of the j-th positive parameter, m be the number of positive parameters, x1 be the first parameter value of the positive parameter before recalculation, and x2 be the second parameter value of the positive parameter after recalculation.

[0126] In addition, based on the number of negative parameters and the first and second parameter values ​​corresponding to the negative parameters, the second weight corresponding to each negative parameter is calculated using a preset formula, specifically using formula (6), which is explained in the following example.

[0127] The expression for calculating the weight of the k-th negative parameter is:

[0128]

[0129] Among them, E k y1 represents the weight of the k-th negative parameter, n represents the number of negative parameters, y1 represents the first parameter value of the negative parameter before recalculation, and y2 represents the second parameter value of the negative parameter after recalculation.

[0130] Based on the positive parameters and their weights, and the negative parameters and their weights, the weights of all the reserve parameters involved in the embodiments of the present invention can be obtained.

[0131] 208. Calculate the geological reserve change for each positive parameter based on the first change and the first weight corresponding to the positive parameter, and calculate the geological reserve change for each negative parameter based on the second change and the second weight corresponding to the negative parameter.

[0132] In this embodiment of the invention, this step can specifically adopt the following formulas (7) and (8), which are explained in the following exemplary way:

[0133] The change in geological reserves corresponding to each positive parameter is calculated using the following formula (7):

[0134] ΔN j =ΔN + ×E j Formula (7);

[0135] Where, ΔN j Let be the change in geological reserves affected by the j-th positive parameter, 10 4 t.

[0136] Furthermore, the geological reserve change corresponding to each negative parameter is calculated using the following formula (8):

[0137] ΔN k =ΔN - ×E k Formula (8);

[0138] Where, ΔN k Let be the change in geological reserves affected by the k-th negative parameter, 10 4 t.

[0139] Below, based on the calculation method for geological reserve changes based on parameter variations provided in the above embodiments of the present invention, specific application scenarios are illustrated. Taking the Bohai XXX oilfield as an example, the contribution of different reserve parameter variations to geological reserve changes is quantitatively calculated. For this specific application scenario, a detailed explanation is provided below:

[0140] For example, as shown in Table 2, based on drilling, logging, well logging and seismic data of the oil field, and on the basis of geological research, the reserve parameters before and after recalculation are determined, including: oil-bearing area, effective thickness of oil layer, porosity, oil saturation, volume factor and surface crude oil density.

[0141] Table 2

[0142] Reserve parameters (units) before recalculation After recalculation <![CDATA[Oil-bearing area (km 2 )]]> 1.180 1.430 Effective oil layer thickness (m) 6.000 7.100 Porosity (%) 32.200 29.900 Oil saturation (f) 0.731 0.651 Volume index (f) 1.159 1.159 <![CDATA[Ground crude oil density (t / m 3 )]]> 0.918 0.916 <![CDATA[Geological reserves (10 4 t)]]> 132.00 156.19

[0143] Using the various reserve parameters before and after recalculation in Table 2, the geological reserves before recalculation were calculated using formula (1) to be 132.0010. 4 The calculated geological reserves are 156.1910 t. 4 Based on this, the total change in geological reserves before and after the recalculation was calculated using formula (2) to be 24.1910. 4 t.

[0144] Secondly, the reserve parameters shown in Table 2 are classified as follows: Before and after the recalculation, the oil-bearing area and the effective thickness of the oil layer increase, while the volume factor remains unchanged. Therefore, the three parameters of oil-bearing area, effective thickness of the oil layer, and volume factor are classified as positive parameters. Before and after the recalculation, the porosity, oil saturation, and surface crude oil density decrease. Therefore, these three parameters are classified as negative parameters. There are three positive parameters and three negative parameters.

[0145] Furthermore, according to formula (3) provided in the embodiment of the present invention, the geological reserve change (i.e., the first change) affected by the positive parameter is calculated, and 57.29 x 10 is obtained. 4 t, and using formula (4) of the present invention, the geological reserve change affected by the negative parameter (i.e., the second change) is calculated, corresponding to -33.10 x 10 4 t.

[0146] Furthermore, according to formula (5) provided in the present invention, the weights of the positive parameters oil-bearing area, effective oil layer thickness and volume factor are calculated to be 0.540, 0.460 and 0.00 respectively; and the weights of the negative parameters porosity, oil saturation and surface crude oil density are calculated to be 0.381, 0.608 and 0.011 respectively using formula (6).

[0147] Finally, according to formula (7) provided in the embodiment of the present invention, the changes in geological reserves affected by the positive parameters of oil-bearing area, effective oil layer thickness, and volume factor are calculated using the product of the "first change" and the weight of the positive parameters, which are 30.937 x 10. 4 t、26.353×10 4 t and 0.000 x 10 4 t; and using formula (8), the geological reserve changes affected by the negative parameters porosity, oil saturation, and surface crude oil density are calculated by multiplying the "second change" with the weight of the negative parameter, which are -12.611 x 10 respectively. 4 t、-20.125×10 4 t and -0.364 x 10 4 t.

[0148] Furthermore, as a response to the above Figure 1 , Figure 2 The present invention provides a calculation device for geological reserve changes based on the influence of parameter variations, illustrating the implementation of the method. This device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this device embodiment will not repeat the details of the aforementioned method embodiment, but it should be understood that the device in this embodiment can implement all the contents of the aforementioned method embodiment. This device is used to quantitatively calculate the contribution of different reserve parameter changes to geological reserve changes, specifically as follows... Figure 3 As shown, the device includes:

[0149] The acquisition unit 31 is used to acquire the first parameter value corresponding to the reserve parameter before recalculation and the second parameter value corresponding to the reserve parameter after recalculation, wherein the reserve parameter is at least one;

[0150] The first calculation unit 32 is used to calculate the first geological reserves corresponding to the recalculation based on the first parameter value.

[0151] The first calculation unit 32 is further configured to calculate the second geological reserves corresponding to the recalculation based on the second parameter value;

[0152] The first determining unit 33 is used to determine the total change in geological reserves between before and after recalculation based on the first geological reserves and the second geological reserves.

[0153] The second calculation unit 34 is also used to calculate the weights corresponding to different storage parameters based on the first parameter value, the second parameter value and the number of storage parameters;

[0154] The second determining unit 35 is further configured to determine the geological reserve change corresponding to each of the reserve parameters based on the weights corresponding to the different reserve parameters and the total change in the geological reserves.

[0155] Furthermore, such as Figure 4 As shown, the device further includes:

[0156] The third determining unit 36 ​​is used to determine the storage parameter as a positive parameter if the value of the second parameter is greater than or equal to the value of the first parameter for the same storage parameter.

[0157] The third determining unit 36 ​​is further configured to, for the same storage parameter, if the value of the second parameter is less than the value of the first parameter, determine the storage parameter as a negative parameter;

[0158] The statistics unit 37 is used to count the number of positive parameters and the number of negative parameters.

[0159] Furthermore, such as Figure 4As shown, the second computing unit 34 includes:

[0160] The calculation module 341 is used to calculate the first weight corresponding to each positive parameter according to the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameter, using a preset first formula;

[0161] The calculation module 341 is further configured to calculate the second weight corresponding to each negative parameter using a preset second formula based on the number of negative parameters and the first and second parameter values ​​corresponding to the negative parameters.

[0162] The determining module 342 is used to determine the weight corresponding to each of the storage parameters based on the first weight and the second weight.

[0163] Furthermore, such as Figure 4 As shown, the first preset formula used is:

[0164]

[0165] Among them, E j Let x1 be the weight of the j-th positive parameter, m be the number of the positive parameters, x1 be the first parameter value of the positive parameter before recalculation, and x2 be the second parameter value of the positive parameter after recalculation.

[0166] Furthermore, such as Figure 4 As shown, the second preset formula used is:

[0167]

[0168] Among them, E k y1 is the weight of the k-th negative parameter, n is the number of negative parameters, y1 is the first parameter value of the negative parameter before recalculation, and y2 is the second parameter value of the negative parameter after recalculation.

[0169] Furthermore, such as Figure 4 As shown, the device further includes:

[0170] The third calculation unit 38 is used to calculate the first change amount corresponding to the change in geological reserves caused by the positive parameters based on the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, and the first geological reserves, using a preset third formula.

[0171] The third preset formula used is:

[0172]

[0173] Among them, Here, m represents the number of positive parameters, and in the table below, i = 1 indicates the first parameter, i = 2 indicates the second parameter, and ΔN... + The geological reserve change affected by the positive parameter is identified as the first change, 10. 4 t;

[0174] The fourth determining unit 39 is used to determine the second change corresponding to the change in geological reserves caused by the negative parameter, based on the total change in geological reserves between the recalculation and the first change.

[0175] Furthermore, such as Figure 4 As shown, the second determining unit 35 includes:

[0176] Calculation module 351 is used to calculate the geological reserve change corresponding to each of the positive parameters based on the first change amount and the first weight.

[0177] The calculation module 351 is further configured to calculate the geological reserve change corresponding to each negative parameter based on the second change amount and the second weight.

[0178] In summary, this invention provides a method and apparatus for calculating geological reserve changes based on the influence of parameter variations. The invention obtains parameter values ​​corresponding to different reserve parameters before and after recalculation, which are used to calculate the geological reserves before and after recalculation, and further calculate the total change in geological reserves before and after recalculation. Then, based on the reserve parameters and the corresponding parameter values ​​before and after recalculation, the weights corresponding to different reserve parameters are calculated. This allows for further utilization of the weights corresponding to different reserve parameters and the total change in geological reserves to determine the geological reserve change caused by the change in the parameter value of each reserve parameter within this total change. Compared to existing technologies, this invention solves the technical problem that existing segmentation methods cannot effectively provide the contribution of parameter variations to geological reserve changes. This invention can calculate the changes in geological reserves based on different parameter variations, and can then be used to effectively and accurately analyze the contribution of each parameter variation to geological reserve changes, which is beneficial for geological reserve sensitivity analysis and geological reserve increment analysis.

[0179] The calculation device for geological reserve changes based on parameter variation includes a processor and a memory. The aforementioned acquisition unit, first calculation unit, first determination unit, second calculation unit, and second determination unit are all stored in the memory as program units. The processor executes the aforementioned program units stored in the memory to achieve the corresponding functions.

[0180] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and by adjusting kernel parameters, the changes in geological reserves caused by different parameter variations can be calculated. This allows for effective and accurate analysis of the impact of various parameter changes on geological reserve changes, which is beneficial for geological reserve sensitivity analysis and geological reserve increment analysis.

[0181] This invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method described above for calculating geological reserve changes based on the influence of parameter variations.

[0182] This invention provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the calculation method for geological reserve changes based on the influence of parameter changes as described above.

[0183] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0184] In a typical configuration, the device includes one or more processors (CPUs), memory, and a bus. The device may also include input / output interfaces, network interfaces, etc.

[0185] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM, and memory includes at least one memory chip. Memory is an example of computer-readable media.

[0186] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0187] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0188] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0189] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent insertions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for calculating a change in a geological reserve based on a change in an influence of a parameter, characterized in that, The method comprises: obtaining a first parameter value corresponding to a reserve parameter before re-calculation and a second parameter value corresponding to the reserve parameter after re-calculation, the reserve parameter being at least one; the reserve parameter at least including: oil-bearing area, effective thickness of oil layer, porosity, original oil saturation, ground crude oil density, and the reciprocal of the formation crude oil volume coefficient; for the same reserve parameter, if the second parameter value is greater than or equal to the first parameter value, the reserve parameter is determined as a positive parameter; for the same reserve parameter, if the second parameter value is less than the first parameter value, the reserve parameter is determined as a negative parameter; counting the number of positive parameters and the number of negative parameters; calculating a first geological reserve corresponding to the first parameter value before re-calculation; calculating a second geological reserve corresponding to the second parameter value after re-calculation; wherein, when calculating the first geological reserve or the second geological reserve, the formula is: N i = A i h i φ i S i ρ i B i ′; where N represents geological reserves, 10 4 A represents oil-bearing area, km 2 h represents effective thickness of oil layer, m; φ represents porosity, f; S represents original oil saturation, %; and p represents ground crude oil density, t / m 3 B' represents the reciprocal of the volume coefficient of formation crude oil, f; i = 1 represents before recalculation, and i = 2 represents after recalculation determining the total change of geological reserves between before and after re-calculation according to the first geological reserve and the second geological reserve, the total change being represented as ΔN=N2-N1, wherein i=1 represents before re-calculation and i=2 represents after re-calculation; calculating the weight corresponding to different reserve parameters according to the first parameter value, the second parameter value, and the number of reserve parameters, including: calculating the first weight corresponding to each positive parameter by using a preset first formula according to the number of positive parameters, the first parameter value corresponding to the positive parameter, and the second parameter value; calculating the second weight corresponding to each negative parameter by using a preset second formula according to the number of negative parameters, the first parameter value corresponding to the negative parameter, and the second parameter value; determining the weight corresponding to each reserve parameter according to the first weight and the second weight; the weight is used to represent the influence and contribution degree of the change of parameter value of different reserve parameters to the change of geological reserves; wherein, the first preset formula used is: wherein E j is a weight of the jth forward parameter, m is a number of the forward parameters corresponding to the forward parameter, xi is a first parameter value corresponding to the forward parameter before the calculation, and x2 is a second parameter value corresponding to the forward parameter after the calculation. wherein, the second preset formula used is: wherein E k is the weight of the kth negative parameter, n is the number of negative parameters, y1 is the first parameter value corresponding to the negative parameter before the complex calculation, and y2 is the second parameter value corresponding to the negative parameter after the complex calculation. determining the change of geological reserves corresponding to each reserve parameter according to the weight corresponding to different reserve parameters and the total change of geological reserves.

2. The method of claim 1, wherein, The method further comprises: calculating the first change corresponding to the influence of the positive parameter on the change of geological reserves by using a preset third formula according to the number of positive parameters, the first parameter value and the second parameter value corresponding to the positive parameter, and the first geological reserve; the third preset formula used is: wherein, for is a positive parameter, m is the number of positive parameters, and the following table i is 1 to represent the first parameter, and the i is 2 to represent the second parameter, ΔN + is the change of geological reserves affected by the positive parameter, and the corresponding identifier is the first change amount, 10 4 t; determining the second change corresponding to the influence of the negative parameter on the change of geological reserves according to the total change of geological reserves between before and after re-calculation and the first change.

3. The method of claim 2, wherein, The determination of the change of geological reserves corresponding to each reserve parameter according to the weight corresponding to different reserve parameters and the total change of geological reserves comprises: calculating the change of geological reserves corresponding to each positive parameter according to the first change and the first weight; calculating the change of geological reserves corresponding to each negative parameter according to the second change and the second weight.

4. A device for calculating a change in a geological reserve based on a change in an influence of a parameter, characterized in that, The device comprises: The acquisition unit is configured to acquire a first parameter value corresponding to a reserve parameter before re-calculation and a second parameter value corresponding to the reserve parameter after re-calculation, the reserve parameter being at least one; The third determination unit is configured to determine the reserve parameter as a positive parameter if the second parameter value is greater than or equal to the first parameter value for the same reserve parameter; The third determination unit is further configured to determine the reserve parameter as a negative parameter if the second parameter value is less than the first parameter value for the same reserve parameter; The statistical unit is configured to count a number of the positive parameters and a number of the negative parameters; The first calculation unit is configured to calculate a first geological reserve corresponding to the first parameter value before re-calculation; The first calculation unit is further configured to calculate a second geological reserve corresponding to the second parameter value after re-calculation; The first determination unit is configured to determine a total change of the geological reserve between before and after re-calculation according to the first geological reserve and the second geological reserve, the total change being represented as ΔN=N2-N1, wherein i=1 represents before re-calculation and i=2 represents after re-calculation; N i = A i h i φ i S i ρ i B i ′; where N represents geological reserves, 10 4 t; A represents oil-bearing area, km 2 ; h represents effective thickness of oil layer, m; φ represents porosity, f; S represents original oil saturation, %; p represents ground crude oil density, t / m 3 ; B' represents the reciprocal of the formation crude oil volume coefficient, f; i = 1 represents before recalculation, i = 2 represents after recalculation; The second calculation unit is further configured to calculate a weight corresponding to each reserve parameter according to the first parameter value, the second parameter value and the number of the reserve parameters, the weight being used to represent an influence and a contribution degree of the change of the parameter value of the different reserve parameters on the change of the geological reserve; The second calculation unit includes a calculation module configured to calculate a first weight corresponding to each positive parameter by using a preset first formula according to the number of the positive parameters, the first parameter value and the second parameter value corresponding to the positive parameters, the calculation module being further configured to calculate a second weight corresponding to each negative parameter by using a preset second formula according to the number of the negative parameters, the first parameter value and the second parameter value corresponding to the negative parameters, and a determination module configured to determine a weight corresponding to each reserve parameter according to the first weight and the second weight; The first preset formula used is as follows: The second preset formula used is as follows: wherein E j is the weight of the jth forward parameter, m is the number of forward parameters corresponding to the forward parameter, xi is the first parameter value corresponding to the forward parameter before the calculation, and x2 is the second parameter value corresponding to the forward parameter after the calculation. The second determination unit is further configured to determine a geological reserve change corresponding to each reserve parameter according to the weight corresponding to each reserve parameter and the total change of the geological reserve. wherein E k is the weight of the kth negative parameter, n is the number of negative parameters, y1 is the first parameter value corresponding to the negative parameter before the complex calculation, and y2 is the second parameter value corresponding to the negative parameter after the complex calculation. The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the calculation method of the geological reserve change based on the influence of the parameter change as claimed in any one of claims 1-3.

5. A computer readable storage medium, characterized in that, The memory, the processor and the computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the calculation method of the geological reserve change based on the influence of the parameter change as claimed in any one of claims 1-3.

6. An electronic device comprising: ​

Images