A method and system for establishing integrated three-dimensional well logging interpretation and evaluation chart

Abstract

The present invention discloses a method and system for establishing an integrated three-dimensional well logging interpretation and evaluation chart. The method comprises: acquiring oilfield logging data; reading logging data points of a 100% water-bearing reservoir from the data to fit a resistivity plane for the 100% water-bearing reservoir; establishing a resistivity plane with a water saturation of K using the resistivity plane of the 100% water-bearing reservoir; and completing the establishment of the integrated three-dimensional well logging interpretation and evaluation chart using the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with a water saturation of K. This method establishes a multi-information integrated three-dimensional well logging interpretation and evaluation chart based on the well logging response characteristics of reservoirs containing 100% undisturbed formation water in the well area. This method eliminates the need for formation water resistivity data and even negates the need for rock electrical parameters. Therefore, the method is simple, reliable, highly applicable, and widely applicable. The method considers the influence of both physical and lithologic properties on resistivity, making it more effective for well logging interpretation and evaluation of low-porosity and low-permeability lithologic oil and gas reservoirs.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil and gas exploration and development, and relates to a method and system for establishing an integrated three-dimensional well logging interpretation and evaluation chart. Background Art

[0002] Reservoir fluid property evaluation is a key component of well logging evaluation during oil and gas reservoir exploration and development. For conventional argillaceous sandstone reservoirs, the Archie equation is typically used to calculate reservoir water saturation, and saturation and porosity are used to determine reservoir fluid properties. In the field, porosity and resistivity are often intersected to create regional logging interpretation maps to quickly identify oil and gas reservoirs. This is primarily used for rapid qualitative evaluation of oil and gas reservoirs. Water cut refers to the proportion of water in a reservoir under standalone production conditions. Accurately obtaining this indicator is crucial for oilfield development.

[0003] The existing logging interpretation and evaluation charts are suitable for homogeneous mudstone sandstone reservoirs with good reservoir properties. They do not consider the impact of lithologic changes on logging responses. For unconventional oil and gas reservoirs, such as the increasingly heterogeneous and complex lithologic oil and gas reservoirs, the evaluation results have large errors and poor effects. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a method and system for establishing an integrated three-dimensional logging interpretation and evaluation chart, so as to truly and effectively reflect unconventional oil and gas reservoirs such as heterogeneous complex lithologic oil and gas reservoirs. This is simple and effective, and improves the compliance rate of logging interpretation and evaluation.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for establishing an integrated three-dimensional well logging interpretation and evaluation chart includes the following steps:

[0007] S1: Obtain oilfield logging data;

[0008] S2: reading the logging data points of 100% water-bearing reservoir through the data, and fitting the resistivity plane of 100% water-bearing reservoir;

[0009] S3: using the resistivity plane of the 100% water-bearing reservoir to establish a resistivity plane with a water saturation of K;

[0010] S4: Based on the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with a water saturation of K, an integrated three-dimensional logging interpretation and evaluation chart is established.

[0011] Preferably, the oilfield logging data in step S1 specifically include the reservoir logging natural gamma curve GR, the reservoir density curve DEN and the reservoir resistivity curve R t, or reservoir logging natural gamma curve GR, acoustic curve AC and reservoir resistivity curve R t .

[0012] Preferably, in step S2, the resistivity of the 100% water-bearing reservoir is obtained by formula (1):

[0013] ln(R t100 )=x1*GR+x2*DEN-x3 (1)

[0014] Where:

[0015] R t100 is the resistivity of a 100% water-bearing reservoir;

[0016] ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir;

[0017] GR is the natural gamma ray curve of well logging;

[0018] DEN is the well logging density curve;

[0019] x1, x2, and x3 are calculation constants.

[0020] Preferably, the oilfield logging data in step S1 specifically include the reservoir logging natural gamma curve GR, the acoustic logging curve AC or the logging density curve DEN and the reservoir resistivity curve R t .

[0021] Preferably, in step S2, the resistivity of the 100% water-bearing reservoir is obtained by formula (2):

[0022] ln(R t100 )=x1*GR-x4*AC+x5 (2)

[0023] Where:

[0024] R t100 is the resistivity of a 100% water-bearing reservoir;

[0025] ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir;

[0026] GR is the natural gamma ray curve of well logging;

[0027] AC is the logging acoustic wave curve;

[0028] x4 and x5 are calculation constants.

[0029] Preferably, the resistivity of the reservoir with a water saturation of K is obtained by formula (3):

[0030] Rtk =R t100 / k n (3)

[0031] Where,

[0032] R tk is the resistivity of the formation when the reservoir water saturation is K;

[0033] k is the reservoir water saturation;

[0034] n is the saturation index.

[0035] Preferably, the step S4 is specifically to draw the resistivity surface of the fitted 100% water-bearing reservoir and the resistivity surface of the reservoir with water saturation of K on the same three-dimensional graph, preliminarily obtain a three-dimensional well logging interpretation evaluation chart, and fine-tune and correct the preliminarily obtained three-dimensional well logging interpretation chart based on the well logging data points of the tested oil layers in the well area to complete the establishment of the integrated three-dimensional well logging interpretation evaluation chart.

[0036] A system for establishing an integrated three-dimensional well logging interpretation and evaluation chart, comprising:

[0037] Data acquisition unit: used to obtain oilfield logging data;

[0038] The first processing unit is used to read the well logging data points of 100% water-bearing reservoir through the data, and fit the resistivity plane of 100% water-bearing reservoir;

[0039] The second processing unit is configured to establish a resistivity plane with a water saturation of K using the resistivity plane of the 100% water-bearing reservoir;

[0040] The third processing unit is used to complete the establishment of an integrated three-dimensional logging interpretation evaluation map based on the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with water saturation K.

[0041] A terminal device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above methods when executing the computer program.

[0042] A computer-readable storage medium stores a computer program, wherein the computer program implements the steps of any one of the above methods when executed by a processor.

[0043] Compared with the prior art, the present invention has the following beneficial technical effects:

[0044] A method for creating integrated 3D logging interpretation and evaluation charts was developed based on the well logging response characteristics of reservoirs containing 100% undisturbed formation water in the wellbore area. This method eliminates the need for formation water resistivity data and even negates the need for rock electrical parameters. Therefore, the method is simple, reliable, and highly applicable, making it suitable for application in other oilfields. By considering the influence of both physical and lithologic properties on resistivity, it is more effective for logging interpretation and evaluation of low-porosity and low-permeability lithologic reservoirs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 A schematic flow chart of a method for establishing an integrated three-dimensional well logging interpretation and evaluation chart according to the present invention;

[0047] Figure 2 This is a schematic diagram of the system structure for establishing an integrated three-dimensional well logging interpretation and evaluation chart according to the present invention;

[0048] Figure 3 The correlation between the core analysis median particle size and the well logging GR in Example 2 of the present invention;

[0049] Figure 4 The correlation between the core analysis median particle size and density DEN in Example 2 of the present invention;

[0050] Figure 5 The binary fitting results of the correlation between the core analysis median particle size and the well logging GR and the density DEN in Example 2 of the present invention are as follows;

[0051] Figure 6 This is a cross-plot of the median particle size of the core analysis and the well logging resistivity at the 100% water-bearing formation in Example 2 of the present invention;

[0052] Figure 7 This is a three-dimensional graph of logging resistivity, logging GR, and density of a 100% water-bearing reservoir in Example 2 of the present invention;

[0053] Figure 8 This is a multi-information three-dimensional integrated logging interpretation chart (resistivity, GR, density) of a certain well area in a certain oil field in Example 2 of the present invention;

[0054] Figure 9This is a multi-information and multi-dimensional integrated logging interpretation chart (resistivity, GR, and acoustic wave) for a certain well area in a certain oil field in Example 2 of the present invention. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0058] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0059] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0060] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] The present invention is described in further detail below with reference to the accompanying drawings:

[0062] Example 1

[0063] like Figure 1 As shown, a method for establishing an integrated three-dimensional well logging interpretation and evaluation chart includes the following steps:

[0064] S1: Obtain oilfield logging data; specifically including reservoir logging natural gamma curve GR, reservoir density curve DEN and reservoir resistivity curve R t , or reservoir logging natural gamma curve GR, acoustic logging curve AC and reservoir resistivity curve R t .

[0065] S2: reading the logging data points of 100% water-bearing reservoir through the data, and fitting the resistivity plane of 100% water-bearing reservoir;

[0066] When obtaining the reservoir logging natural gamma curve GR, reservoir density DEN or reservoir acoustic wave AC and reservoir resistivity R t When the curve is drawn, the resistivity plane of the 100% water-bearing reservoir is obtained by (1):

[0067] ln(R t100 )=x1*GR+x2*DEN-x3 (1)

[0068] Where:

[0069] R t100 is the resistivity of the 100% water-bearing reservoir in ohm·m;

[0070] ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir;

[0071] GR is the natural gamma ray curve of well logging, the unit is API;

[0072] DEN is the well logging density curve, the unit is g / cm 3 ;

[0073] x1, x2, and x3 are calculation constants, which are obtained by fitting the data points of 100% water-bearing reservoir.

[0074] ln(R t100 )=x1*GR-x4*AC+x5 (2)

[0075] Where:

[0076] R t100 is the resistivity of the 100% water-bearing reservoir in ohm·m;

[0077] ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir;

[0078] GR is the well logging GR curve, the unit is API;

[0079] AC is the well logging acoustic wave curve, unit is us / ft;

[0080] x4 and x5 are calculation constants, which are obtained by fitting the data points of 100% water-bearing reservoir.

[0081] S3: Using the resistivity plane of the 100% water-bearing reservoir, establish a resistivity plane with a water saturation of K; specifically, obtain it through formula (3):

[0082] R tk =R t100 / k n (3)

[0083] Where,

[0084] R tk is the apparent resistivity of the formation when the reservoir water saturation is K;

[0085] k is the reservoir water saturation, which can be the reservoir water saturation value selected to establish the chart, selected according to the logging interpretation standard of the oil (gas field), a decimal;

[0086] n is the saturation index.

[0087] S4: The resistivity surface of the fitted 100% water-bearing reservoir and the resistivity surface of the reservoir with a water saturation of K are plotted on the same three-dimensional graph to preliminarily obtain a three-dimensional well logging interpretation and evaluation chart. The three-dimensional well logging interpretation chart preliminarily obtained is fine-tuned and corrected based on the well logging data points of the tested oil layers in the well area to complete the establishment of the integrated three-dimensional well logging interpretation and evaluation chart.

[0088] The main purpose of this invention is to provide a method for creating a multi-information, integrated, three-dimensional logging interpretation and evaluation chart using conventional well logging data. The technical problem to be solved is that only nine conventional well logging curves covering 100% of the water-bearing reservoir in the target well area are required to produce a multi-information, multi-dimensional, integrated logging interpretation chart. Even rock electrical test parameters and formation water resistivity data are not required. This method is simple and effective, and has excellent application value.

[0089] like Figure 2 As shown, the present invention also provides a system for establishing an integrated three-dimensional well logging interpretation and evaluation chart, comprising:

[0090] Data acquisition unit 100: used to obtain oilfield logging data;

[0091] The first processing unit 200 is used to read the well logging data points of 100% water-bearing reservoir through the data, and fit the resistivity plane of 100% water-bearing reservoir;

[0092] The second processing unit 300 is configured to establish a resistivity plane with a water saturation of K using the resistivity plane of the 100% water-bearing reservoir;

[0093] The third processing unit 400 is used to establish an integrated three-dimensional logging interpretation and evaluation map by using the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with a water saturation of K on the three-dimensional map.

[0094] The present invention provides a terminal device comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the processor implements the steps of the aforementioned method for establishing an integrated 3D well logging interpretation and evaluation chart. Alternatively, when the processor executes the computer program, the processor implements the functions of the modules / units described in the aforementioned device embodiments.

[0095] The computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to accomplish the present invention.

[0096] The terminal device may be a computing device such as a desktop computer, a notebook computer, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0097] The processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0098] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0099] If the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the above-mentioned steps of the method for establishing an integrated three-dimensional well logging interpretation and evaluation chart. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0100] Example 2

[0101] The present invention is described with an example of an oil field.

[0102] The experimental data of particle size of a certain layer in a certain block of a certain oil field is as follows: Figure 3 As shown by Figure 3It shows that the median grain size of the formation is correlated with GR, and the correlation formula is y = -0.0215x + 1.8162, R 2 =0.4853. It is also related to density, and its correlation formula is y=-3.3963x+8.4545, R 2 =0.462, see Figure 4 , using a single attribute to represent the error is large, using binary fitting can get better results, the binary fitting results are shown in the attached Figure 5 .

[0103] Figure 5 The median particle size is a function of GR and density. The fitting results are shown in Equation 21:

[0104] LD=4.723-0.016*GR-1.36*DEN (21)

[0105] in,

[0106] LD is the median apparent particle size, in millimeters;

[0107] GR is the natural gamma curve of well logging, the unit is API;

[0108] DEN is the bulk density curve of well logging, unit is g / cm 3 .

[0109] According to formula 11, the median apparent grain size LD contains lithologic and physical property information. To study the relationship between it and electrical properties, in order to exclude the influence of oil content, a 100% water-bearing stratum in another block of the oil field was selected for correlation analysis. The correlation formula is y = -1.9654x + 1.5004, R 2 =0.8869, the result is as follows Figure 6 .

[0110] From the cross plot of the median apparent particle size and the well logging resistivity, it can be seen that the two have a good correlation. The resistivity of the 100% water-bearing reservoir is defined as R t100 ,but:

[0111] ln(R t100 )=1.5004-1.9654*LD (twenty two)

[0113] Where,

[0114] LD is the median apparent grain size curve fitted by logging, in millimeters;

[0115] R t100 is the resistivity of a 100% water-bearing reservoir in ohm-meters.

[0116] Combining equations (21) and (22), we get equation 23:

[0117] ln(R t100 )=0.0314*GR+2.6729*DEN-7.7822 (twenty three)

[0119] That is, in a 100% water-bearing reservoir, the logarithm of the measured reservoir resistivity is linearly related to the reservoir's natural gamma GR and the well logging volume density DEN. t100 The data points of GR, natural gamma, and volume density DEN fall on a surface on the associated three-dimensional graph. The measured data points of a 100% water-bearing pure water layer in a certain layer system of an oil field are confirmed, and the results are as follows: Figure 7 shown.

[0120] According to the Archie equation for muddy sandstone reservoir:

[0121] When the reservoir water saturation K = 100%, the reservoir water saturation is equal to 100%, that is, Sw = 100% = 1:

[0122]

[0123]

[0124] Where: a, b, m, n are reservoir rock electrical parameters, obtained from rock electrical experiments;

[0125] R W is the formation water resistivity in ohm·m;

[0126] is the formation porosity, a decimal.

[0127] Then, when the reservoir water saturation K = 50%, the reservoir water saturation is equal to 50%, that is, Sw = 50% = 0.5, then:

[0128]

[0129] Where: a, b, m, n are reservoir rock electrical parameters;

[0130] R W is the formation water resistivity in ohm·m;

[0131] is the formation porosity, a decimal.

[0132] Dividing Equation (24) by Equation (25) can give the resistivity R when the reservoir contains 50% water. t50 :

[0133] That is: R t50 =R t100 / 0.5 n (26)

[0134] Similarly, the reservoir resistivity R can be obtained when the reservoir water content K = 20% t20

[0135] R t20 =R t100 / 0.2 n (27)

[0136] R t100 、R t50 、R t20 By drawing on the same 3D map, we can get the multi-information and multi-dimensional integrated logging interpretation map of the region. The results are as follows: Figure 8 shown.

[0137] The real-time logging data formation deep resistivity R t , natural gamma ray (GR), and bulk density (DEN) are plotted on the interpretation chart, which can not only quickly identify the fluid properties of the reservoir, but also determine the quality of the reservoir (well test calibration) based on the position of the data points.

[0138] The same research method is used to make the measured resistivity R t , natural gamma ray GR, and acoustic AC logging three-dimensional interpretation chart, the results are as follows Figure 9 shown.

[0139] The present invention proposes a method for establishing a multi-information integrated three-dimensional logging interpretation and evaluation chart using conventional logging data, which includes the following steps:

[0140] The first step is to select wells with better logging curve quality in a certain layer of an oil field and perform multi-well standardization.

[0141] The second step is to read the 100% water-bearing reservoir logging data points and fit the pure water layer (natural gamma GR and bulk density DEN / acoustic AC must have a certain range of variation). Figure 7 As shown, this can be done in modern software such as MATLAB, or in Excel.

[0142] The third step is to produce the resistivity surface of the reservoir with 50% water content and the resistivity surface of the reservoir with 20% water content (which can be adjusted according to the lower limit of the saturation of the region, such as 45% or 55%). The n value is the saturation index, which is obtained from the rock electrical experiment in the well area, such as Figure 8 、 Figure 9 .

[0143] The fourth step is to point the regional oil test data points on the prepared three-dimensional logging interpretation map, and fine-tune and correct the prepared logging interpretation map.

[0144] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for establishing an integrated three-dimensional well logging interpretation and evaluation chart, characterized in that: The following steps are involved: S1: Obtain oilfield logging data; S2: reading the logging data points of 100% water-bearing reservoir through the data, and fitting the resistivity plane of 100% water-bearing reservoir; S3: using the resistivity plane of the 100% water-bearing reservoir to establish a resistivity plane with a water saturation of K; S4: Based on the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with water saturation K, complete the establishment of an integrated three-dimensional logging interpretation evaluation chart; In step S2, when the acquired oilfield logging data includes the reservoir logging natural gamma curve GR and the reservoir density curve DEN, the resistivity of the 100% water-bearing reservoir is obtained by formula (1): ln(R t100 )=x1*GR+x2*DEN-x3(1) Where: R t100 is the resistivity of a 100% water-bearing reservoir; ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir; GR is the natural gamma ray curve of well logging; DEN is the well logging density curve; x1, x2, and x3 are calculation constants; When the acquired oilfield logging data include the reservoir logging natural gamma curve GR and the logging acoustic wave curve AC, the resistivity of the 100% water-bearing reservoir is obtained by formula (2): ln(R t100 )=x1*GR-x4*AC+x5(2) Where: R t100 is the resistivity of a 100% water-bearing reservoir; ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir; GR is the natural gamma ray curve of well logging; AC is the logging acoustic wave curve; x4 and x5 are calculation constants; In step S3, the resistivity with water saturation K is obtained by formula (3): R tk =R t100 / k n (3) In the formula, R tk is the resistivity of the formation when the reservoir water saturation is K; k is the reservoir water saturation; n is the saturation index; Step S4 specifically includes: drawing the fitted resistivity surface of the 100% water-bearing reservoir and the resistivity plane with a water saturation of K on the same three-dimensional graph, preliminarily obtaining a three-dimensional well logging interpretation evaluation chart, and fine-tuning and correcting the preliminarily obtained three-dimensional well logging interpretation chart based on the well logging data points of the tested oil layers in the well area, thereby completing the establishment of an integrated three-dimensional well logging interpretation evaluation chart.

2. A system for establishing an integrated three-dimensional well logging interpretation and evaluation chart, characterized in that: include: Data acquisition unit: used to obtain oilfield logging data; The first processing unit is used to read the 100% water-bearing reservoir logging data points through the data and fit the resistivity plane of the 100% water-bearing reservoir; The second processing unit is configured to establish a resistivity plane with a water saturation of K using the resistivity plane of the 100% water-bearing reservoir; The third processing unit is used to complete the establishment of an integrated three-dimensional well logging interpretation evaluation map based on the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with a water saturation of K; When the acquired oilfield logging data include the reservoir logging natural gamma curve GR and the reservoir density curve DEN, the resistivity of the 100% water-bearing reservoir is obtained by formula (1): ln(R t100 )=x1*GR+x2*DEN-x3(1) Where: R t100 is the resistivity of a 100% water-bearing reservoir; ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir; GR is the natural gamma ray curve of well logging; DEN is the well logging density curve; x1, x2, and x3 are calculation constants; When the acquired oilfield logging data include the reservoir logging natural gamma curve GR and the logging acoustic wave curve AC, the resistivity of the 100% water-bearing reservoir is obtained by formula (2): ln(R t100 )=x1*GR-x4*AC+x5(2) Where: R t100 is the resistivity of a 100% water-bearing reservoir; ln(R t100 ) is the natural logarithm of the resistivity of a 100% water-bearing reservoir; GR is the natural gamma ray curve of well logging; AC is the logging acoustic wave curve; x4 and x5 are calculation constants; The resistivity with water saturation K is obtained by formula (3): R tk =R t100 / k n (3) In the formula, R tk is the resistivity of the formation when the reservoir water saturation is K; k is the reservoir water saturation; n is the saturation index; It is used to complete the establishment of an integrated three-dimensional well logging interpretation and evaluation map based on the resistivity plane of the 100% water-bearing reservoir and the resistivity plane with a water saturation of K. Specifically, the resistivity plane of the fitted 100% water-bearing reservoir and the resistivity plane with a water saturation of K are plotted on the same three-dimensional map to preliminarily obtain a three-dimensional well logging interpretation and evaluation map, and the preliminarily obtained three-dimensional well logging interpretation map is fine-tuned and corrected based on the logging data points of the tested oil layers in the well area to complete the establishment of the integrated three-dimensional well logging interpretation and evaluation map.

3. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to claim 1 are implemented.

4. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 1 are implemented.

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