Method and device for determining quantity of to-be-found resources of oil and gas field

Abstract

The invention provides a method and device for determining the quantity of to-be-found resources of an oil and gas field. The method comprises the steps of obtaining found oil and gas field resource quantity and found oil and gas field quantity in a target area; constructing a target function according to the found oil and gas field resource quantity and the found oil and gas field quantity; wherein the objective function represents a corresponding relation between the number of oil and gas fields and the average resource quantity of the oil and gas fields; determining the total number of the oil and gas fields in the target area according to the number of the found oil and gas fields; inputting the total quantity of the oil and gas fields into the target function to obtain a target average resource quantity; and determining the total resource quantity of the oil and gas fields to be found in the target area according to the target average resource quantity and the total quantity of the oil and gas fields. Based on the method, the target function between the oil-gas field quantity and the oil-gas field average resource quantity can be established without depending on the relationship between the oil-gas field resource quantity and the mining time, so that the accuracy of calculating the total resource quantity of the to-be-found oil-gas field can be improved.

Description

Technical Field

[0001] The present invention relates to the field of petroleum exploration technology, and in particular to a method and device for determining the amount of undiscovered resources in an oil and gas field. Background Art

[0002] In the prior art, the discovery process method can be used to determine the amount of resources in undiscovered oil and gas fields. The basic principle of the discovery process method is that the scale of oil and gas fields (the scale of oil and gas fields, i.e., the amount of resources in oil and gas fields) decreases with the exploration time. The larger the scale of oil and gas fields, the more likely they are to be discovered earlier. Therefore, the scales of discovered oil and gas fields are arranged in chronological order of discovery to form a discovery sequence. The discovery process model is established through the discovery sequence to predict the scale of oil and gas fields to be discovered. However, the basic principle of the discovery process method is controversial. In actual applications, larger oil and gas fields may be discovered early or late. Therefore, the scale of oil and gas fields to be discovered cannot be accurately predicted by the discovery process method.

[0003] Currently, no effective solution has been proposed for the above technical problems. Summary of the invention

[0004] This specification provides a method and device for determining the amount of undiscovered resources in an oil and gas field, which can quickly and accurately predict the amount of undiscovered resources in an oil and gas field.

[0005] The purpose of the embodiments of this specification is to provide a method for determining the amount of undiscovered resources in an oil and gas field, including:

[0006] Obtain the discovered oil and gas field resources and the number of discovered oil and gas fields in the target area;

[0007] According to the resources of the discovered oil and gas fields and the number of the discovered oil and gas fields, construct an objective function; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields;

[0008] Determine the total number of oil and gas fields in the target area based on the number of discovered oil and gas fields;

[0009] Inputting the total number of oil and gas fields into the objective function to obtain a target average resource amount;

[0010] The total resource volume of the oil and gas fields to be discovered in the target area is determined based on the target average resource volume and the total number of the oil and gas fields.

[0011] Furthermore, in another embodiment of the method, constructing an objective function according to the discovered oil and gas field resources and the number of discovered oil and gas fields includes:

[0012] Arrange the discovered oil and gas field resources in descending order to obtain an ordering result; wherein the ordering result also includes descending order numbers corresponding to the discovered oil and gas field resources;

[0013] Calculate the average resource volume of the discovered oil and gas fields based on the ranking results and the number of discovered oil and gas fields;

[0014] The objective function is obtained by fitting the descending order numbers corresponding to the resources of discovered oil and gas fields and the average resources of discovered oil and gas fields.

[0015] Furthermore, in another embodiment of the method, the calculating the average resource volume of the discovered oil and gas fields according to the sorting results and the number of the discovered oil and gas fields includes:

[0016] The average resource volume of discovered oil and gas fields is determined according to the following formula:

[0017]

[0018] Where i represents the descending sequence number, i = 1, 2, ..., k; k represents the descending sequence number, k = 1, 2, ..., m; m represents the number of discovered oil and gas fields; n i It indicates the resources of discovered oil and gas fields with sequence number i in descending order; It represents the average resources of discovered oil and gas fields corresponding to the first k discovered oil and gas fields.

[0019] Furthermore, in another embodiment of the method, fitting the descending order numbers corresponding to the discovered oil and gas field resources and the average resources of the discovered oil and gas fields to obtain the objective function includes:

[0020] Based on the least square method, the power function is fitted to the descending order numbers corresponding to the resources of the discovered oil and gas fields and the average resources of the discovered oil and gas fields to obtain the objective function.

[0021] Furthermore, in another embodiment of the method, determining the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields includes:

[0022] Obtain multiple probability coefficients; and obtain the area of ​​the target area, the number of exploration wells in the target area, and the well control area in the target area;

[0023] According to multiple probability coefficients, target area, number of exploration wells, and well control area, the number of undiscovered oil and gas fields corresponding to multiple probability coefficients is determined;

[0024] The number of oil and gas fields to be discovered corresponding to the multiple probability coefficients is added to the number of discovered oil and gas fields to obtain the total number of oil and gas fields corresponding to the multiple probability coefficients in the target area.

[0025] Furthermore, in another embodiment of the method, determining the number of undiscovered oil and gas fields corresponding to the multiple probability coefficients according to the multiple probability coefficients, the target area, the number of exploration wells, and the well control area includes:

[0026] The number of undiscovered oil and gas fields is determined according to the following formula:

[0027]

[0028] Among them, k1 represents the exploration coefficient, A represents the number of exploration wells, S1 represents the well-controlled area, S2 represents the area of ​​the target area, k2 represents the coefficient to be explored, q represents the number of oil and gas fields to be discovered, k3 represents the probability coefficient, and m represents the number of discovered oil and gas fields.

[0029] Furthermore, in another embodiment of the method, inputting the total number of oil and gas fields into the objective function to obtain the target average resource volume includes:

[0030] The total number of oil and gas fields corresponding to the multiple probability coefficients are respectively input into the objective function to obtain the target average resource volume corresponding to the multiple probability coefficients.

[0031] Furthermore, in another embodiment of the method, determining the total resources of the oil and gas fields to be discovered in the target area according to the target average resources and the total number of the oil and gas fields includes:

[0032] Sum the resources of the discovered oil and gas fields to obtain the total resources of the discovered oil and gas fields;

[0033] Multiplying the target average resource volume and the total number of oil and gas fields to obtain the total resource volume of the oil and gas fields;

[0034] Subtract the total resources of the oil and gas fields from the total resources of the discovered oil and gas fields to obtain the total resources of the oil and gas fields to be discovered.

[0035] On the other hand, the embodiments of this specification also provide a device for determining the amount of undiscovered resources in an oil and gas field, comprising:

[0036] An acquisition module is used to obtain the resources of discovered oil and gas fields and the number of discovered oil and gas fields in the target area;

[0037] A construction module, used to construct an objective function according to the discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields;

[0038] A first calculation module is used to determine the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields;

[0039] A second calculation module is used to input the total number of oil and gas fields into the objective function to obtain a target average resource amount;

[0040] The third calculation module is used to determine the total resource volume of the oil and gas fields to be discovered in the target area according to the target average resource volume and the total number of the oil and gas fields.

[0041] On the other hand, the embodiments of this specification further provide a computer-readable storage medium having computer instructions stored thereon, and when the computer-readable storage medium executes the instructions, the method for determining the amount of undiscovered resources in the oil and gas field described above is implemented.

[0042] A method for determining the amount of undiscovered resources in an oil and gas field provided in an embodiment of the present specification comprises obtaining the amount of discovered oil and gas field resources and the number of discovered oil and gas fields in a target area; constructing an objective function based on the amount of discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average amount of oil and gas field resources; determining the total number of oil and gas fields in the target area based on the number of discovered oil and gas fields; inputting the total number of oil and gas fields into the objective function to obtain a target average amount of resources; and determining the total amount of undiscovered oil and gas fields in the target area based on the target average amount of resources and the total number of oil and gas fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of this specification, the drawings required for use in the embodiments will be briefly introduced below. The drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a flow chart of an embodiment of a method for determining the amount of undiscovered resources in an oil and gas field provided in this specification;

[0045] Figure 2 It is a schematic diagram of the corresponding relationship between the discovery year of oil and gas fields and the resource volume provided in the embodiments of this specification;

[0046] Figure 3 It is a schematic diagram of the corresponding relationship between the descending sequence number of the oil and gas fields and the resource volume provided in the embodiments of this specification;

[0047] Figure 4 is a schematic diagram of the objective function provided in the embodiments of this specification;

[0048] Figure 5 This is a schematic diagram of the structure of an embodiment of a device for determining the amount of undiscovered resources in an oil and gas field provided in this specification;

[0049] Figure 6 This is a schematic diagram of the structural composition of a server provided in this manual. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0051] In the prior art, the discovery process method is used to determine the amount of resources in undiscovered oil and gas fields. The basic principle of the discovery process method is that the scale of oil and gas fields (the scale of oil and gas fields, i.e., the amount of resources in oil and gas fields) decreases with the exploration time. The larger the scale of oil and gas fields, the more likely they are to be discovered earlier. Therefore, the scales of discovered oil and gas fields are arranged in chronological order of discovery to form a discovery sequence. The discovery process model is established through the discovery sequence to predict the scale of oil and gas fields to be discovered. However, the basic principle of the discovery process method is controversial. In actual applications, larger oil and gas fields may be discovered early or late. Therefore, the scale of oil and gas fields to be discovered cannot be accurately predicted by the discovery process method.

[0052] In the prior art, the Monte Carlo simulation method can also be used to determine the amount of undiscovered oil and gas field resources. Geological experts give the scale and quantity probability distribution of the oil and gas fields to be discovered, and then the amount of undiscovered resources is obtained through multiple iterative multiplications. The accuracy of this method depends on the subjective judgment of the geological experts and the accuracy of the geological data in the study area. If there are errors in the subjective judgment of the geological experts, or if the geological data of the study area cannot be fully and accurately obtained, the calculation accuracy will be affected.

[0053] In view of the above problems existing in the existing methods and the specific reasons for the above problems, this application introduces a method for determining the amount of undiscovered resources of oil and gas fields based on the target average resource amount, so as to accurately calculate the total resource amount of undiscovered oil and gas fields in the target area.

[0054] Based on the above ideas, this specification proposes a method for determining the amount of undiscovered resources in oil and gas fields. First, obtain the amount of discovered oil and gas field resources and the number of discovered oil and gas fields in the target area; construct an objective function based on the amount of discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average amount of oil and gas field resources; determine the total number of oil and gas fields in the target area based on the number of discovered oil and gas fields; then, input the total number of oil and gas fields into the objective function to obtain the target average amount of resources; finally, determine the total amount of undiscovered oil and gas fields in the target area based on the target average amount of resources and the total number of oil and gas fields.

[0055] See also Figure 1 As shown, the embodiment of this specification provides a method for determining the amount of undiscovered resources in an oil and gas field. In specific implementation, the method includes the following contents.

[0056] S101: Obtain the discovered oil and gas field resources and the number of discovered oil and gas fields in the target area.

[0057] In some embodiments, the target area specifically refers to an area rich in oil and gas resources, such as a basin.

[0058] In some embodiments, the resources of a discovered oil and gas field may also be referred to as the recoverable reserves of a discovered oil and gas field or the scale of a discovered oil and gas field.

[0059] S102: constructing an objective function according to the discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields.

[0060] In some embodiments, according to the discovered oil and gas field resources and the number of discovered oil and gas fields, constructing an objective function specifically includes:

[0061] S1021: Arrange the discovered oil and gas field resources in descending order to obtain an ordering result; wherein the ordering result also includes descending order numbers corresponding to the discovered oil and gas field resources;

[0062] S1022: Calculate the average resource volume of the discovered oil and gas fields according to the ranking results and the number of the discovered oil and gas fields;

[0063] S1023: Fit the descending order numbers corresponding to the discovered oil and gas field resources and the average resources of the discovered oil and gas fields to obtain the objective function.

[0064] In some embodiments, according to the ranking results and the number of discovered oil and gas fields, the average resource volume of the discovered oil and gas fields is calculated, specifically including:

[0065] The average resource volume of discovered oil and gas fields is determined according to the following formula:

[0066]

[0067] Where i represents the descending sequence number, i = 1, 2, ..., k; k represents the descending sequence number, k = 1, 2, ..., m; m represents the number of discovered oil and gas fields; n i It indicates the resources of discovered oil and gas fields with sequence number i in descending order; It represents the average resources of discovered oil and gas fields corresponding to the first k discovered oil and gas fields.

[0068] In some embodiments, the descending order numbers corresponding to the resources of the discovered oil and gas fields and the average resources of the discovered oil and gas fields are fitted to obtain the objective function, specifically including: based on the least squares method, a power function is fitted to the descending order numbers corresponding to the resources of the discovered oil and gas fields and the average resources of the discovered oil and gas fields to obtain the objective function.

[0069] The specific process of obtaining the objective function is described below.

[0070] In the target area, there are m discovered oil and gas fields in total, so the number of discovered oil and gas fields is equal to m, and each discovered oil and gas field corresponds to a discovered oil and gas field resource. The discovered oil and gas field resources are sorted in descending order to obtain the sorting result: {n1,n2,n3,n4,…,n m}, where n k It represents the resources of discovered oil and gas fields numbered k in descending order, where k = 1, 2, 3, ..., m.

[0071] In some embodiments, the resources of discovered oil and gas fields include two parts: the produced part is called production, and the unproduced part stored in the underground reservoir is called remaining recoverable reserves. The remaining recoverable reserves can be obtained by the volume method, that is, by multiplying parameters such as the trap area, reservoir thickness, rock porosity and oil saturation.

[0072] For the discovered oil and gas field resources n1 with the number 1 arranged in descending order, the average resources of the discovered oil and gas fields corresponding to the first discovered oil and gas field are obtained.

[0073] For the discovered oil and gas field resources n2 with the sequence number 2 arranged in descending order, the average resources of the discovered oil and gas fields corresponding to the first two discovered oil and gas fields are obtained.

[0074] For the discovered oil and gas field resources n3 with the number 3 arranged in descending order, the average resources of the discovered oil and gas fields corresponding to the first three discovered oil and gas fields are obtained.

[0075] For the discovered oil and gas field resources n with sequence number k arranged in descending order k , get the average resource volume of discovered oil and gas fields corresponding to the first k discovered oil and gas fields

[0076] Based on the above method, the average resource volume of the discovered oil and gas fields in the first item of the sorting results can be calculated: Average resources of discovered oil and gas fields in the first two items Average resources of discovered oil and gas fields up to the first m items Since Formula 1 is the average of the resources of the first k oil and gas fields, k can also be understood as the number of oil and gas fields.

[0077] Then, the descending order number k is used as the horizontal axis, and the average resource volume of the discovered oil and gas fields corresponding to the first k discovered oil and gas fields is calculated as As the ordinate, a power function fitting (y=x α ), and obtain the objective function.

[0078] S103: Determine the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields.

[0079] In some embodiments, determining the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields specifically includes:

[0080] S1031: Obtain multiple probability coefficients; and obtain the area of ​​the target area, the number of exploration wells in the target area, and the well control area in the target area;

[0081] S1032: Determine the number of undiscovered oil and gas fields corresponding to the multiple probability coefficients according to the multiple probability coefficients, the target area, the number of exploration wells, and the well control area;

[0082] S1033: Add the number of oil and gas fields to be discovered corresponding to the multiple probability coefficients to the number of discovered oil and gas fields, respectively, to obtain the total number of oil and gas fields corresponding to the multiple probability coefficients in the target area.

[0083] In some embodiments, the probability coefficient includes a first probability coefficient, a second probability coefficient, and a third probability coefficient. The first probability coefficient can be set to 10%, the second probability coefficient can be set to 50%, and the third probability coefficient can be set to 90%. The probability coefficient represents the possibility that there are more oil and gas fields to be discovered in the target area.

[0084] In some embodiments, there are multiple types of exploration wells (referred to as exploration wells) in the target area, such as wildcat wells, expansion wells, deep exploration wells, etc. The sum of the number of all exploration wells is called the number of exploration wells in the target area, and the number of exploration wells can represent the degree of exploration in the target area. Each exploration well can characterize the oil and gas display of hundreds of square kilometers around itself, and the area of ​​oil and gas display around itself that the exploration well can characterize is called the well control area. The well control area in the target area is obtained by summing up all the well control areas in the target area (if there is an overlapping area of ​​the well control areas of different exploration wells, the overlapping area will not be repeatedly summed).

[0085] In some embodiments, the number of oil and gas fields to be discovered is determined according to the following formula:

[0086]

[0087] Among them, k1 represents the exploration coefficient, A represents the number of exploration wells, S1 represents the well-controlled area, S2 represents the area of ​​the target area, k2 represents the coefficient to be explored, q represents the number of oil and gas fields to be discovered, k3 represents the probability coefficient, and m represents the number of discovered oil and gas fields.

[0088] In some embodiments, k3 may be 10%, 50%, or 90%. The number of undiscovered oil and gas fields is a predicted value based on the probability coefficient, the target area, the number of exploration wells, and the well control area. Different numbers of undiscovered oil and gas fields can be predicted based on different probability coefficients.

[0089] In a specific scenario example, k3 = 10%, and the corresponding number of oil and gas fields to be discovered is

[0090] In a specific scenario example, k3 = 50%, and the corresponding number of oil and gas fields to be discovered is

[0091] In a specific scenario example, k3 = 90%, and the corresponding number of oil and gas fields to be discovered is

[0092] Based on the above embodiment, the number of undiscovered oil and gas fields corresponding to multiple probability coefficients can be determined.

[0093] In some embodiments, the number of oil and gas fields to be discovered corresponding to the multiple probability coefficients is added to the number of oil and gas fields that have been discovered, to obtain the total number of oil and gas fields corresponding to the multiple probability coefficients in the target area. For example, the total number of oil and gas fields corresponding to k3=10% is equal to It is abbreviated as Q1. The total number of oil and gas fields corresponding to k3=50% is equal to It is abbreviated as Q2. The total number of oil and gas fields corresponding to k3=90% is equal to Abbreviated as Q3.

[0094] S104: Input the total number of oil and gas fields into the objective function to obtain a target average resource volume.

[0095] In some embodiments, the total number of oil and gas fields is input into the objective function to obtain the target average resource, specifically including: inputting the total number of oil and gas fields corresponding to the multiple probability coefficients into the objective function respectively to obtain the target average resource corresponding to the multiple probability coefficients. Specifically, Q1, Q2, and Q3 are input into the objective function in sequence to obtain the target average resource N1 corresponding to k3=10%, the target average resource N2 corresponding to k3=50%, and the target average resource N3 corresponding to k3=90%.

[0096] S105: Determine the total resource volume of the oil and gas fields to be discovered in the target area according to the target average resource volume and the total number of the oil and gas fields.

[0097] In some embodiments, according to the target average resource volume and the total number of oil and gas fields, determining the total resource volume of the oil and gas fields to be discovered in the target area specifically includes:

[0098] S1051: summing up the resources of the discovered oil and gas fields to obtain the total resources of the discovered oil and gas fields;

[0099] S1052: multiplying the target average resource volume and the total number of oil and gas fields to obtain the total resource volume of the oil and gas fields;

[0100] S1053: Subtract the total resources of the oil and gas fields from the total resources of the discovered oil and gas fields to obtain the total resources of the oil and gas fields to be discovered.

[0101] In some embodiments, the resources of discovered oil and gas fields can be summed using the following formula:

[0102]

[0103] Among them, N0 represents the total resources of discovered oil and gas fields.

[0104] In some embodiments, the total resources of the oil and gas field corresponding to k3=10% are M1=N1×Q1; the total resources of the oil and gas field corresponding to k3=50% are M2=N2×Q2; the total resources of the oil and gas field corresponding to k3=90% are M3=N3×Q3.

[0105] In some embodiments, k3=10% corresponds to the total resource volume of the undiscovered oil and gas fields P1=M1-N0; k3=50% corresponds to the total resource volume of the undiscovered oil and gas fields P2=M2-N0; k3=90% corresponds to the total resource volume of the undiscovered oil and gas fields P3=M3-N0.

[0106] The method recorded in this application does not need to consider the relationship between the order of discovery and scale of oil and gas fields, but by constructing a corresponding relationship between the number of oil and gas fields and the average resource volume of oil and gas fields, the target average resource volume can be obtained, and then the resource volume of oil and gas fields to be discovered can be predicted. Since this application obtains the distribution law of oil and gas resources (i.e., the average resource volume of oil and gas fields) from discovered oil and gas fields, it avoids excessive reliance on the geological experience of professionals, and sets different probability coefficients to obtain the total resource volume of multiple oil and gas fields to be discovered, and finally obtains a reasonable range of the total resource volume of oil and gas fields to be discovered.

[0107] In some embodiments, after obtaining the total resource volume of the oil and gas field to be discovered, the target area can also be graded and evaluated according to a pre-constructed grading system. The pre-constructed grading system is shown in Table 1, where 1 ton = 7.3 barrels.

[0108] Table 1

[0109] The scope of total resources of undiscovered oil and gas fields level Less than 1 billion barrels Areas with low exploration potential 1 billion barrels to 5 billion barrels Medium exploration potential area 5 billion barrels to 10 billion barrels Areas with high exploration potential More than 10 billion barrels Areas with extremely high exploration potential

[0110] In some embodiments, after obtaining the total resource volume of the oil and gas field to be discovered, the following steps may be used to verify whether the total resource volume of the oil and gas field to be discovered is reasonable:

[0111] S1: Calculate the total area of ​​discovered oil and gas fields;

[0112] S2: Check whether the total area of ​​discovered oil and gas fields is greater than 50% × the area of ​​the target area;

[0113] S3: When it is determined that the total area of ​​the discovered oil and gas fields is greater than 50%×the area of ​​the target area, detecting whether the total resources of the oil and gas fields to be discovered are less than the total resources of the discovered oil and gas fields;

[0114] S4: In the case where it is determined that the total resources of the undiscovered oil and gas fields are less than the total resources of the discovered oil and gas fields, it is determined that the total resources forecast of the undiscovered oil and gas fields is reasonable;

[0115] S5: When it is determined that the total resources of the undiscovered oil and gas fields are greater than or equal to the total resources of the discovered oil and gas fields, it is determined that the prediction of the total resources of the undiscovered oil and gas fields is unreasonable; at this time, the probability coefficient can be adjusted to re-predict the total resources of the undiscovered oil and gas fields.

[0116] In some embodiments, appropriate oil and gas field exploitation measures may also be determined based on the total resources of the oil and gas fields to be discovered.

[0117] For example, for undiscovered oil and gas fields with total resources greater than 1 billion barrels, they can be exploited through natural blowouts when the reservoir porosity and permeability conditions are good; when the reservoir physical properties are poor, they can be exploited through water injection; when the reservoir physical properties are moderate, they can be exploited through staged fracturing, polymer drive and other methods to enhance recovery.

[0118] For another example, for undiscovered oil and gas fields with total resources less than or equal to 1 billion barrels, their profit level is first determined; if the profit level is high (with a higher probability of profit), exploitation is carried out; if the profit level is low (with a lower probability of profit), exploitation is abandoned.

[0119] In some embodiments, a probability density distribution function of the amount of oil and gas field resources in the target area can also be constructed, and the probability density distribution function is constructed based on the amount of resources of the discovered oil and gas fields and the discovery sequence of the discovered oil and gas fields, and complies with the log-normal distribution. Then, the total number of oil and gas fields (Q1 or Q2 or Q3), the amount of resources of the discovered oil and gas fields, and the number of oil and gas fields to be discovered (q) are input into the probability density distribution function, and the optimal arrangement of the scales of all oil and gas fields is solved according to the probability density distribution function, so the amount of resources corresponding to the q oil and gas fields to be discovered can be determined, and then the total amount of resources of the oil and gas fields to be discovered can be determined. Then, the total amount of resources obtained based on the probability density distribution function and the total amount of resources obtained based on the target function are comprehensively analyzed (for example: weighted sum of the two) to obtain the final total amount of resources.

[0120] In a specific scenario example, let's take the Santos Basin in Brazil as an example. The area of ​​the Santos Basin is 330,000 square kilometers. Currently, 90 oil and gas fields have been discovered in the basin, and the total resources of the discovered oil and gas fields are 46.85 billion barrels. According to the year of discovery of the oil and gas fields, most of the oil and gas fields were discovered after 2000. Figure 2 The corresponding relationship between the discovery year of oil and gas fields and the amount of resources is shown. Figure 2 It can be seen that the order of discovery of oil and gas fields does not necessarily conform to the rule that "the larger the oil and gas field, the earlier it is discovered". Figure 3 As shown, Figure 3 The data points in the figure represent oil and gas fields. There is only one oil and gas field with resources greater than 10 billion barrels, namely the Buzios oil and gas field. There are 11 oil and gas fields with resources between 1 billion barrels and 10 billion barrels, 18 oil and gas fields with resources between 100 million barrels and 1 billion barrels, and 60 oil and gas fields with resources less than 100 million barrels. Figure 3 This is the result of arranging the discovered oil and gas field resources in descending order. Figure 3 Calculate the average resource of discovered oil and gas fields based on the data points in (k represents the descending order number. In this scenario example, the value range of k is k = 1, 2, ..., 90). k is fitted (taking k as the horizontal coordinate x, As the ordinate y, the power function is fitted), and the target function is y = 204.27 × x -0.796 , the objective function is Figure 4 Then, determine the total number of oil and gas fields in the Santos Basin, Q1, Q2, Q3, and input Q1, Q2, Q3 into y = 204.27 × x -0.796 The target average resources N1, N2, N3 are obtained; the target average resources are multiplied by the total number of oil and gas fields (Q1, Q2, Q3) to obtain the total resources M1, M2, M3 of all oil and gas fields in the Santos Basin (where M1 = N1 × Q1, M2 = N2 × Q2, M3 = N3 × Q3). Finally, the total resources of all oil and gas fields are subtracted from the total resources of discovered oil and gas fields to obtain the total resources P1, P2, P3 of the oil and gas fields to be discovered, where P1 = M1-468.5, P2 = M2-468.5, and P3 = M3-468.5.

[0121] Based on the above method for determining the amount of undiscovered resources in oil and gas fields, this specification also proposes an embodiment of a device for determining the amount of undiscovered resources in oil and gas fields, see Figure 5 As shown, the device for determining the amount of undiscovered resources in oil and gas fields specifically includes the following modules:

[0122] Acquisition module 501, used to acquire the resources of discovered oil and gas fields and the number of discovered oil and gas fields in the target area;

[0123] A construction module 502 is used to construct an objective function according to the discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields;

[0124] A first calculation module 503 is used to determine the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields;

[0125] A second calculation module 504 is used to input the total number of oil and gas fields into the objective function to obtain a target average resource amount;

[0126] The third calculation module 505 is used to determine the total resource volume of the oil and gas fields to be discovered in the target area according to the target average resource volume and the total number of the oil and gas fields.

[0127] In some embodiments, the construction module 502 is specifically used to arrange the discovered oil and gas field resources in descending order to obtain a sorting result; wherein the sorting result also includes a descending order number corresponding to the discovered oil and gas field resources; according to the sorting result and the number of discovered oil and gas fields, the average resources of the discovered oil and gas fields are calculated; the descending order number corresponding to the discovered oil and gas field resources and the average resources of the discovered oil and gas fields are fitted to obtain the objective function.

[0128] In some embodiments, the first calculation module 503 is specifically used to obtain multiple probability coefficients; and obtain the area of ​​the target area, the number of exploration wells in the target area, and the well control area in the target area; determine the number of undiscovered oil and gas fields corresponding to the multiple probability coefficients based on the multiple probability coefficients, the area of ​​the target area, the number of exploration wells, and the well control area; add the number of undiscovered oil and gas fields corresponding to the multiple probability coefficients and the number of discovered oil and gas fields, respectively, to obtain the total number of oil and gas fields corresponding to the multiple probability coefficients in the target area.

[0129] In some embodiments, the second calculation module 504 is specifically used to input the total number of oil and gas fields corresponding to the multiple probability coefficients into the objective function respectively to obtain the target average resource volume corresponding to the multiple probability coefficients.

[0130] In some embodiments, the third calculation module 505 is specifically used to sum the resources of the discovered oil and gas fields to obtain the total resources of the discovered oil and gas fields; multiply the target average resources by the total number of oil and gas fields to obtain the total resources of the oil and gas fields; subtract the total resources of the oil and gas fields from the total resources of the discovered oil and gas fields to obtain the total resources of the oil and gas fields to be discovered.

[0131] It should be noted that the units, devices or modules described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. For the convenience of description, the above devices are described separately by functions divided into various modules. Of course, when implementing this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the modules that implement the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0132] The embodiments of this specification also provide a computer storage medium for a method for determining the amount of undiscovered resources in an oil and gas field, wherein the computer storage medium stores computer program instructions, and when the computer program instructions are executed, the following are achieved: obtaining the amount of discovered oil and gas field resources and the number of discovered oil and gas fields in a target area; constructing an objective function based on the amount of discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the correspondence between the number of oil and gas fields and the average amount of oil and gas field resources; determining the total number of oil and gas fields in the target area based on the number of discovered oil and gas fields; inputting the total number of oil and gas fields into the objective function to obtain a target average amount of resources; and determining the total amount of undiscovered oil and gas fields in the target area based on the target average amount of resources and the total number of oil and gas fields.

[0133] In this embodiment, the storage medium includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a cache, a hard disk (HDD), or a memory card. The memory may be used to store computer program instructions. The network communication unit may be an interface for network connection communication set in accordance with the standard specified by the communication protocol.

[0134] In this embodiment, the functions and effects specifically implemented by the program instructions stored in the computer storage medium can be explained in comparison with other implementations and will not be described in detail here.

[0135] The present specification also provides a server, including a processor and a memory for storing instructions executable by the processor. When the processor is implemented, it can perform the following steps according to the instructions: obtain the resources of discovered oil and gas fields and the number of discovered oil and gas fields in the target area; construct an objective function according to the resources of discovered oil and gas fields and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of oil and gas fields; determine the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields; input the total number of oil and gas fields into the objective function to obtain the target average resources; determine the total resources of the oil and gas fields to be discovered in the target area according to the target average resources and the total number of oil and gas fields.

[0136] In order to complete the above instructions more accurately, refer to Figure 6 As shown, the embodiment of this specification also provides another specific server, wherein the server includes a network communication port 601, a processor 602 and a memory 603, and the above structures are connected through internal cables so that each structure can perform specific data interaction.

[0137] The network communication port 601 can be used to obtain the amount of discovered oil and gas field resources and the number of discovered oil and gas fields in the target area.

[0138] The processor 602 can be specifically used to construct an objective function based on the resources of the discovered oil and gas fields and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields; according to the number of discovered oil and gas fields, the total number of oil and gas fields in the target area is determined; the total number of oil and gas fields is input into the objective function to obtain the target average resources; according to the target average resources and the total number of oil and gas fields, the total resources of the oil and gas fields to be discovered in the target area are determined.

[0139] The memory 603 may be specifically used to store corresponding instruction programs.

[0140] In this embodiment, the network communication port 601 can be a virtual port that is bound to different communication protocols so that different data can be sent or received. For example, the network communication port can be a port responsible for web data communication, a port responsible for FTP data communication, or a port responsible for email data communication. In addition, the network communication port can also be a physical communication interface or communication chip. For example, it can be a wireless mobile network communication chip, such as GSM, CDMA, etc.; it can also be a Wifi chip; it can also be a Bluetooth chip.

[0141] In this embodiment, the processor 602 may be implemented in any appropriate manner. For example, the processor may take the form of a microprocessor or processor and a computer-readable medium storing a computer-readable program code (such as software or firmware) executable by the (micro)processor, a logic gate, a switch, an application specific integrated circuit (ASIC), a programmable logic controller, and an embedded microcontroller, etc. This specification does not limit this.

[0142] In this embodiment, the memory 603 may include multiple levels. In a digital system, anything that can store binary data can be a memory; in an integrated circuit, a circuit with a storage function but no physical form is also called a memory, such as RAM, FIFO, etc.; in a system, a storage device with a physical form is also called a memory, such as a memory stick, TF card, etc.

[0143] Although the present specification provides method operation steps as described in the embodiments or flow charts, more or less operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiments is only one way of executing the order of many steps, and does not represent a unique execution order. When the device or client product in practice is executed, it can be executed in sequence or in parallel according to the method shown in the embodiments or the drawings (for example, a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment). The term "include", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such a process, method, product or device. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or device including the elements. The first, second, etc. words are used to represent the name, and do not represent any particular order.

[0144] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0145] This specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media including storage devices.

[0146] Through the description of the above embodiments, it can be known that those skilled in the art can clearly understand that the present specification can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present specification can essentially be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a mobile terminal, a server, or a network device, etc.) to execute the methods described in each embodiment of the present specification or some parts of the embodiments.

[0147] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. This specification can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc.

[0148] Although the present specification is described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present specification without departing from the spirit of the present specification, and it is intended that the appended claims include these modifications and changes without departing from the spirit of the present specification.

Claims

1. A method for determining the amount of undiscovered resources in an oil and gas field, characterized in that: include: Obtain the discovered oil and gas field resources and the number of discovered oil and gas fields in the target area; According to the resources of the discovered oil and gas fields and the number of the discovered oil and gas fields, construct an objective function; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields; Determine the total number of oil and gas fields in the target area based on the number of discovered oil and gas fields; Inputting the total number of oil and gas fields into the objective function to obtain a target average resource amount; The total resources of the oil and gas fields to be discovered in the target area are determined based on the target average resources and the total number of the oil and gas fields.

2. The method according to claim 1, characterized in that According to the resources of the discovered oil and gas fields and the number of the discovered oil and gas fields, an objective function is constructed, including: Arrange the discovered oil and gas field resources in descending order to obtain an ordering result; wherein the ordering result also includes descending order numbers corresponding to the discovered oil and gas field resources; Calculate the average resource volume of the discovered oil and gas fields based on the ranking results and the number of discovered oil and gas fields; The objective function is obtained by fitting the descending order numbers corresponding to the resources of discovered oil and gas fields and the average resources of discovered oil and gas fields.

3. The method according to claim 2, characterized in that Based on the ranking results and the number of discovered oil and gas fields, the average resources of discovered oil and gas fields are calculated, including: The average resource volume of discovered oil and gas fields is determined according to the following formula: Where i represents the descending sequence number, i = 1, 2, ..., k; k represents the descending sequence number, k = 1, 2, ..., m; m represents the number of discovered oil and gas fields; n i It indicates the resources of discovered oil and gas fields with sequence number i in descending order; It represents the average resources of discovered oil and gas fields corresponding to the first k discovered oil and gas fields.

4. The method according to claim 2, characterized in that: The descending order numbers corresponding to the discovered oil and gas field resources and the average resources of the discovered oil and gas fields are fitted to obtain the objective function, including: Based on the least square method, the power function is fitted to the descending order numbers corresponding to the resources of the discovered oil and gas fields and the average resources of the discovered oil and gas fields to obtain the objective function.

5. The method according to claim 1, characterized in that According to the number of discovered oil and gas fields, the total number of oil and gas fields in the target area is determined, including: Obtain multiple probability coefficients; and obtain the area of ​​the target area, the number of exploration wells in the target area, and the well control area in the target area; According to multiple probability coefficients, target area, number of exploration wells, and well control area, the number of undiscovered oil and gas fields corresponding to multiple probability coefficients is determined; The number of oil and gas fields to be discovered corresponding to the multiple probability coefficients is added to the number of discovered oil and gas fields to obtain the total number of oil and gas fields corresponding to the multiple probability coefficients in the target area.

6. The method according to claim 5, characterized in that According to multiple probability coefficients, target area, number of exploration wells, and well control area, the number of undiscovered oil and gas fields corresponding to multiple probability coefficients is determined, including: The number of undiscovered oil and gas fields is determined according to the following formula: Among them, k1 represents the exploration coefficient, A represents the number of exploration wells, S1 represents the well-controlled area, S2 represents the area of ​​the target area, k2 represents the coefficient to be explored, q represents the number of oil and gas fields to be discovered, k3 represents the probability coefficient, and m represents the number of discovered oil and gas fields.

7. The method according to claim 5, characterized in that The total number of oil and gas fields is input into the objective function to obtain the target average resource volume, including: The total number of oil and gas fields corresponding to the multiple probability coefficients are respectively input into the objective function to obtain the target average resource volume corresponding to the multiple probability coefficients.

8. The method according to claim 1, characterized in that: Determine the total resources of the oil and gas fields to be discovered in the target area according to the target average resources and the total number of the oil and gas fields, including: Sum the resources of the discovered oil and gas fields to obtain the total resources of the discovered oil and gas fields; Multiplying the target average resource volume and the total number of oil and gas fields to obtain the total resource volume of the oil and gas fields; Subtract the total resources of the oil and gas fields from the total resources of the discovered oil and gas fields to obtain the total resources of the oil and gas fields to be discovered.

9. A device for determining the amount of undiscovered resources in an oil and gas field, characterized in that: include: An acquisition module is used to obtain the resources of discovered oil and gas fields and the number of discovered oil and gas fields in the target area; A construction module, used to construct an objective function according to the discovered oil and gas field resources and the number of discovered oil and gas fields; wherein the objective function represents the corresponding relationship between the number of oil and gas fields and the average resources of the oil and gas fields; A first calculation module is used to determine the total number of oil and gas fields in the target area according to the number of discovered oil and gas fields; A second calculation module is used to input the total number of oil and gas fields into the objective function to obtain a target average resource amount; The third calculation module is used to determine the total resource volume of the oil and gas fields to be discovered in the target area according to the target average resource volume and the total number of the oil and gas fields.

10. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the instructions are executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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