Method for determining water saturation of fractured-vuggy medium core

Abstract

The invention provides a method for determining the water saturation of a fracture-cavity medium rock core. The method comprises the following steps: acquiring output data of the rock core at different inclination angles and different oil-water injection ratios; calculating the output data to obtain initial core water saturation; drawing a scatter diagram of the water saturation along with the water content by taking the water content of the outlet end of the rock core as a horizontal coordinate and the initial water saturation of the rock core as a vertical coordinate; fitting data in the scatter diagram by using a nonlinear least square method based on an oil-water diversion model to obtain a relationship between different inclination angles and the fracture-cavity rock core moisture content; and calculating based on the relationship of the water contents of the fracture-cavity rock cores with different inclination angles to obtain the water saturation of the standard fracture-cavity rock core under different inclination angles. The method disclosed by the invention quantitatively reveals the rule of influence of the fracture-cavity inclination angle on the water saturation in the rock core, and overcomes the limitation that a traditional sandstone rock core testing method is not suitable for fracture-cavity rock core testing.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development technology, and in particular to a method for determining the water saturation of fractured-cavity rock cores. Background Technology

[0002] In the field of oil and gas exploration and development, accurately obtaining the water saturation (S) in reservoir rocks is crucial. w Oil-water relative permeability and its derived flow splitting curves are fundamental and crucial components for reservoir description, reserve assessment, development planning, dynamic analysis, and recovery rate research. These are core parameters for describing the two-phase flow behavior of oil and water and calculating saturation. Currently, the commonly used standard method in the industry, such as the steady-state method specified in the People's Republic of China Petroleum and Natural Gas Industry Standard "SY / T 5345-1999 Method for Determining Relative Permeability of Reservoir Rocks," is an important means of determining oil-water relative permeability and establishing saturation relationships. This method controls a constant oil-water ratio (WOR) and, when the injection and production rates reach equilibrium (i.e., steady state), measures the pressure difference and produced water cut to calculate the water saturation of the core under this state. This method is relatively mature under horizontal core conditions (tilt angle θ = 0°) and is mainly feasible for mean sandstone reservoirs. Currently, there are no displacement standards or core water saturation calculation methods for heterogeneous and discontinuous media such as fractured-vuggy reservoirs.

[0003] Fractured-vuggy reservoirs often exhibit large-scale fracture structures, and these structures frequently possess a certain dip angle (θ≠0°). During oil-water displacement under inclined conditions, the distribution and flow path of the water phase within the fracture-vuggy space are time-varying due to gravitational differentiation of oil and water. Existing standard steady-state experiments require horizontal placement, completely neglecting the influence of inclined fractures and vuggies on oil-water flow behavior and the final water saturation distribution. This is especially true for highly heterogeneous fractured-vuggy cores (such as fractured carbonate reservoirs and porous reservoirs), where the fluid flow mechanism differs from that of homogeneous sandstone. The interaction between the dip angle and the complex pore network of the fractured-vuggy medium makes the competitive flow of the oil and water phases and the saturation distribution more complex and difficult to predict. Existing techniques and methods are insufficient to accurately characterize the water saturation distribution of fractured-vuggy cores considering inclined conditions.

[0004] Therefore, it is necessary to develop a method that can effectively take into account the influence of different dip angles, especially applicable to the calculation of water saturation in fractured-vuggy core samples, so as to more realistically reflect the development dynamics of inclined fractured-vuggy reservoirs and provide a reliable basis for accurate development decisions. Summary of the Invention

[0005] In view of this, the present invention provides a method for determining the water saturation of fractured-cavity rock cores to solve the above problems.

[0006] This invention provides a method for determining the water saturation of fractured-cavity core samples, comprising: acquiring production data of core samples at different dip angles and different oil-water injection ratios; calculating the initial core water saturation based on the production data; plotting a scatter plot of water saturation versus water content with the water content at the core outlet as the abscissa and the initial core water saturation as the ordinate; fitting the data in the scatter plot using a nonlinear least squares method based on an oil-water flow model to obtain the relationship between different dip angles and fractured-cavity core water content; and calculating the standard fractured-cavity core water saturation at different dip angles based on the relationship between the fractured-cavity core water content at different dip angles.

[0007] In another implementation of the present invention, the output data includes the pressure at both ends of the core holder device and the liquid output and water production at the liquid outlet.

[0008] In another embodiment of the present invention, one end of the core clamping device is connected to a water injection pipeline, an oil injection pipeline and a pressure measuring device; the other end is connected to a liquid outlet pipeline and a pressure testing device.

[0009] In another implementation of the present invention, the formula for calculating the initial core water saturation is expressed as:

[0010]

[0011] Where, q w (t) represents the cumulative water injection volume at time t, in ml; Q w (t) represents the cumulative water production at time t, in mL; PV represents the core pore volume, in mL.

[0012] In another implementation of the present invention, the formula for calculating the water saturation of standard fracture core samples is expressed as follows:

[0013]

[0014] Among them, C θ and n θ These are the coefficients to be fitted with respect to angle θ; f w The water content in the produced liquid, %; S w The water saturation of the core is expressed as %.

[0015] In another implementation of the present invention, it further includes: drawing an indicator chart of the outlet water content and core saturation at different inclination angles based on the relationship between different inclination angles and core water content.

[0016] In another aspect, the present invention provides a system for determining the water saturation of fractured-cavity core samples, comprising: a data acquisition module for acquiring core production data at different inclination angles and different oil-water injection ratios; a data processing module for calculating the production data to obtain an initial core water saturation; plotting a scatter plot of water saturation versus water content with the core outlet water content as the abscissa and the initial core water saturation as the ordinate; fitting the data in the scatter plot using a nonlinear least squares method based on an oil-water flow model to obtain the relationship between different inclination angles and fractured-cavity core water content; and a result calculation module for calculating the standard fractured-cavity core water saturation at different inclination angles based on the relationship between the fractured-cavity core water content at different inclination angles.

[0017] In another aspect, the present invention provides an electronic device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of a method for determining the water saturation of fractured-cavity core material as described in any of the preceding claims.

[0018] In another aspect, the present invention provides a computer storage medium, characterized in that the computer storage medium stores a computer program, which, when executed by a processor, implements the steps in a method for determining the water saturation of a fractured-cavity core as described in any of the preceding claims.

[0019] The method for determining the water saturation of fractured-cavity core samples of this invention employs an oil-water flow model for fitting, which has clear physical meaning, is easy to operate and understand by researchers. Through fitting, a unique set of (C, n) parameters is obtained for different angles. This parameterization result is concise and quantitative; it deepens the understanding of the seepage mechanism, revealing the law that parameters C and n increase with increasing dip angle. This provides a quantitative analytical basis for a deeper understanding of the interaction mechanism of factors such as gravity, capillary force, and rock wettability in the complex oil-water two-phase seepage process of inclined fractured-cavities. It quantitatively reveals the influence of the fracture-cavity inclination angle on the water saturation in the core sample, overcoming the limitation of traditional sandstone core testing methods being unsuitable for fractured-cavity core testing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. By reading the detailed description of the embodiments below, the advantages and benefits of the solutions will become clear to those skilled in the art. The accompanying drawings are only for illustrating preferred embodiments and are not intended to limit the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic flowchart of a method for determining the water saturation of fractured rock cores according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the displacement device according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of a fractured core model of the S oilfield, according to an embodiment of the present invention.

[0024] Figure 4 This is a scatter plot and its fitted curve of water saturation when θ = 0°, according to an embodiment of the present invention.

[0025] Figure 5 This is a scatter plot and its fitted curve of water saturation when θ = 30°, according to an embodiment of the present invention.

[0026] Figure 6 This is a scatter plot and its fitted curve of water saturation when θ = 60°, according to an embodiment of the present invention.

[0027] Figure 7 This is a scatter plot and its fitted curve of water saturation when θ = 90°, according to an embodiment of the present invention.

[0028] Figure 8 This is a fitted curve of the relationship between C and n and the tilt angle in one embodiment of the present invention.

[0029] Figure 9 This is a graph showing the water content curves of core samples at different tilt angles, according to an embodiment of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art should fall within the protection scope of the present invention.

[0031] Figure 1 This is a schematic flowchart of a method for determining the water saturation of fractured-cavitary media cores according to an embodiment of the present invention, as shown below. Figure 1 As shown, this embodiment mainly includes:

[0032] S101. Obtain core production data under different dip angles and different oil-water injection ratios.

[0033] S102. Calculate the output data to obtain the initial core water saturation.

[0034] S103. Plot a scatter plot of water saturation versus water content, with the water content at the core outlet as the abscissa and the initial core water saturation as the ordinate.

[0035] S104. Based on the oil-water flow model, the data in the scatter plot are fitted using the nonlinear least squares method to obtain the relationship between different tilt angles and the water content of fracture cores.

[0036] S105. Based on the relationship between the water content of fracture cores at different inclination angles, the water saturation of standard fracture cores at different inclination angles is calculated.

[0037] The method for determining the water saturation of fractured-cavity core samples of this invention employs an oil-water flow model for fitting, which has clear physical meaning, is easy to operate and understand by researchers. Through fitting, a unique set of (C, n) parameters is obtained for different angles. This parameterization result is concise and quantitative; it deepens the understanding of the seepage mechanism, revealing the law that parameters C and n increase with increasing dip angle. This provides a quantitative analytical basis for a deeper understanding of the interaction mechanism of factors such as gravity, capillary force, and rock wettability in the complex oil-water two-phase seepage process of inclined fractured-cavities. It quantitatively reveals the influence of the fracture-cavity inclination angle on the water saturation in the core sample, overcoming the limitation of traditional sandstone core testing methods being unsuitable for fractured-cavity core testing.

[0038] In another implementation of the present invention, the output data includes the pressure at both ends of the core holder device and the liquid output and water production at the liquid outlet.

[0039] In another embodiment of the present invention, one end of the core clamping device is connected to a water injection pipeline, an oil injection pipeline and a pressure measuring device; the other end is connected to a liquid outlet pipeline and a pressure testing device.

[0040] For example, such as Figure 2 As shown, the left end is the injection end, and the right end is the production end. Connect one end of the core holder device to the water injection pipeline (record q). w ), oil injection pipeline (record q) o And a pressure measuring device (test pressure parameter P1), the other end of which is connected to the liquid outlet line (to record Q). l and Q w ), pressure testing device (test pressure P2).

[0041] During the experiment, the pressures P1 and P2 at both ends of the clamp and the liquid output Q at the outlet end were recorded. l Water production Q w .

[0042] Based on actual needs, prepare formation water and crude oil of the required viscosity, and place the core model of the fractured-cavity medium to be tested into the core holder after saturating it with oil.

[0043] In another implementation of the present invention, the formula for calculating the initial core water saturation is expressed as:

[0044]

[0045] Where, q w (t) represents the cumulative water injection volume at time t, in ml; Q w (t) represents the cumulative water production at time t, in mL; PV represents the core pore volume, in mL.

[0046] For example, under the condition that other parameters remain unchanged, the inclination angles of the core holder are changed in four groups (inclination angle θ = 0°, 30°, 60°, 90°), and at one angle, the oil-water injection ratios are changed in eleven groups (the total oil-water injection rate is constant, and the oil-water ratios are 10:0, 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8, 1:9, 0:10).

[0047] After the pressure at both ends stabilizes, record the injection volume and the water content f of the produced liquid at equal intervals. w Based on the water cut at the core production port during the displacement process, the initial core water saturation S was inverted. w .

[0048] In another implementation of the present invention, the formula for calculating the water saturation of standard fracture core samples is expressed as follows:

[0049]

[0050] Among them, C θ and n θ These are the coefficients to be fitted with respect to angle θ; f w The water content in the produced liquid, %; S w The water saturation of the core is expressed as %.

[0051] For example, with the core outlet end f w Moisture content is the x-axis, and the calculated core water content S is the y-axis. w A scatter plot of water saturation versus water content was plotted with saturation as the ordinate. Based on the oil-water flow model, a nonlinear least squares method was used to fit the test data, obtaining the relationship between the coefficients C and n in the water saturation formula and the tilt angle θ at test angles (0°, 30°, 60°, 90°): C θ n θ .

[0052] In another implementation of the present invention, it further includes: drawing an indicator chart of the outlet water content and core saturation at different inclination angles based on the relationship between different inclination angles and core water content.

[0053] For example, based on the obtained water content of fracture cores at different inclination angles θ, i.e., the standard formula for calculating the water saturation of fracture cores, the outlet water content f at different inclination angles (0–90°) is plotted. w With core saturation S w Instruction diagram.

[0054] Example 1

[0055] like Figure 3 As shown, a 3D-printed fractured core sample from the S oilfield is used as an example. It has a diameter of 25mm, a length of 50mm, and a porosity of 10%.

[0056] Saturated oil from the core was placed into the holder. The holder was tilted at an angle θ = 0°. The oil-to-water ratio was initially injected at 10:1. Once the pressure difference across the holder stabilized, the outflow data was recorded. The oil-to-water ratio was then changed sequentially to complete this set of experiments. Figure 4 As shown, a scatter plot of water saturation versus water content was obtained, and a fitting was performed to derive the formula for calculating the water content of the core at θ = 0°, i.e., C. 0° n 0° Value:

[0057]

[0058] Among them, C 0° =0.63237±0.02363, n 0° =1.00186±0.04481, R 2 =0.99399.

[0059] Continue setting the clamp tilt angle θ = 30°, conduct the test as required, and record the data, such as... Figure 5 As shown, the fitted curve and the formula for calculating the moisture content are obtained:

[0060]

[0061] Among them, C 30° =0.86683±0.05239, n 30° =1.30948±0.07565, R 2 =0.98993.

[0062] When θ = 60°, the fitted curve is as follows: Figure 6 As shown, the formula for calculating moisture content is:

[0063]

[0064] Among them, C 60° =1.1856±0.1183, n 60°=1.62994±0.12733, R 2 =0.98376.

[0065] When θ = 90°, the fitted curve is as follows Figure 7 As shown, the formula for calculating moisture content is:

[0066]

[0067] Among them, C 90° =1.36839±0.13443, n 90° =1.75254±0.12792, R 2 =0.98683.

[0068] Finally, we get C. θ n θ The relationship with the test angle is as follows: Figure 8 As shown.

[0069] According to C θ n θ The graph shows the relationship between C and angle, yielding C under different tilt angles θ. θ n θ Value:

[0070] C(θ)=0.63237+0.00606θ-0.00003θ 2

[0071] n(θ)=1.00186+0.01613θ-0.00007θ 2

[0072] like Figure 9 As shown, the outlet moisture content f is plotted at different tilt angles (0–90°). w With core saturation S w Instruction diagram.

[0073] This invention is based on a real fractured-vuggy reservoir core model. According to the experimental procedure, core production data is obtained. According to the water saturation calculation method, the water saturation value inside the fractured-vuggy core is obtained, and water saturation indicator charts of fractured-vuggy media cores at different tilt angles are drawn.

[0074] This invention provides theoretical support for the dynamic inversion of reservoir water saturation based on production well water production during water injection development of various fractured-vuggy reservoirs. It mainly involves the calculation of fluid flow patterns and liquid phase content in heterogeneous and discontinuous media, and can provide application basis and useful reference for the following related fields:

[0075] (1) In the field of development and production optimization of fractured-vuggy reservoirs, the main focus is on the inversion of reservoir water saturation during the water injection development process of fractured-vuggy and pore-fractured reservoirs.

[0076] (2) Enhanced oil recovery technology, mainly targeting water-driven reservoirs and foam or polymer flooding to enhance oil recovery, focusing on quantifying the sweep range and displacement efficiency.

[0077] (3) In the field of unconventional oil and gas core testing, we mainly conduct testing experiments on cores of discontinuous reservoirs to correct the relative permeability model.

[0078] (4) Environmental engineering and groundwater treatment, such as the migration simulation process of pollutants (e.g., petroleum hydrocarbons) in fractured aquifers, and the displacement experimental data are inverted into a pollutant residual saturation model.

[0079] Another aspect of the present invention provides a system for determining the water saturation of fractured-cavitary media cores, comprising:

[0080] Data acquisition module: Acquires core output data under different dip angles and different oil-water injection ratios.

[0081] Data processing module: Calculates the output data to obtain the initial core water saturation; plots a scatter plot of water saturation versus water content with the core outlet water content as the x-axis and the initial core water saturation as the y-axis; based on the oil-water flow model, uses the nonlinear least squares method to fit the data in the scatter plot to obtain the relationship between water content of cores with different tilt angles and fractures.

[0082] The result calculation module calculates the water saturation of standard fracture cores at different inclination angles based on the relationship between the water content of the cores at different inclination angles.

[0083] The water saturation determination system for fractured-cavity cores of this invention employs an oil-water flow model for fitting, which has clear physical meaning, is easy to operate and understand by researchers. Through fitting, a unique set of (C, n) parameters is obtained for different angles. This parameterization result is concise and quantitative; it deepens the understanding of seepage mechanisms, revealing the law that parameters C and n increase with increasing dip angle. This provides a quantitative analytical basis for a deeper understanding of the interaction mechanism of factors such as gravity, capillary force, and rock wettability in the complex oil-water two-phase seepage process of inclined fractured-cavities. It quantitatively reveals the influence of the fracture-cavity inclination angle on the water saturation in the core, overcoming the limitation of traditional sandstone core testing methods being unsuitable for fractured-cavity core testing.

[0084] In another aspect of the present invention, the electronic device includes: a processor, a memory, and a communication bus and a communication interface.

[0085] in:

[0086] The processor, memory, and communication interface communicate with each other via a communication bus.

[0087] A communication interface is used to communicate with other electronic devices or servers.

[0088] The processor is used to execute programs, specifically the steps of any of the methods for determining the water saturation of fractured-cavity core samples in the above embodiments.

[0089] Specifically, the program may include program code, which includes computer operation instructions.

[0090] The processor may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application. The one or more processors included in the smart device may be processors of the same type, such as one or more CPUs; or they may be processors of different types, such as one or more CPUs and one or more ASICs.

[0091] Memory is used to store programs. Memory may include high-speed RAM, and may also include non-volatile memory, such as at least one disk drive.

[0092] Specifically, the program can be used to cause the processor to execute the steps of any of the methods for determining the water saturation of fractured-cavitary media cores described in the embodiments. The specific implementation of each step in the program can be found in the corresponding descriptions of the steps and units executed in any of the methods for determining the water saturation of fractured-cavitary media cores described above, and will not be repeated here. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the devices and modules described above can be referred to the corresponding process descriptions in the foregoing method embodiments.

[0093] An exemplary embodiment of this application also provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to perform the methods of various embodiments of this application.

[0094] The methods described above according to embodiments of the present invention can be implemented in hardware, firmware, or as software or computer code that can be stored in a recording medium (such as a CD-ROM, RAM, floppy disk, hard disk, or magneto-optical disk), or as computer code originally stored on a remote recording medium or a non-transitory machine-readable medium and subsequently stored on a local recording medium, downloaded via a network. Thus, the methods described herein can be processed by software stored on a recording medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware (such as an ASIC or FPGA). It is understood that the computer, processor, microprocessor controller, or programmable hardware includes storage components (e.g., RAM, ROM, flash memory, etc.) capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods described herein. Furthermore, when a general-purpose computer accesses code used to implement the methods shown herein, the execution of the code transforms the general-purpose computer into a dedicated computer for executing the methods shown herein.

[0095] Specific embodiments of the present invention have now been described. Other embodiments are within the scope of the appended claims. In some cases, the actions described in the claims can be performed in a different order and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result.

[0096] It should be noted that all directional indications (such as up, down, left, right, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components in a certain specific order (as shown in the figure). If the specific order changes, the directional indication will also change accordingly.

[0097] In the description of this invention, the terms "first" and "second" are used only for convenience in describing different components or names, and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0098] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0099] It should be noted that although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of the present invention. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of the present invention.

[0100] The examples of the embodiments of the present invention are intended to concisely illustrate the technical features of the embodiments of the present invention, so that those skilled in the art can intuitively understand the technical features of the embodiments of the present invention, and are not intended to be an improper limitation of the embodiments of the present invention.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the water saturation of fractured-cavitary rock cores, characterized in that, include: Obtain core production data under different dip angles and different oil-water injection ratios; The initial core water saturation was obtained by calculating the output data. A scatter plot of water saturation versus water content is drawn with water content at the core outlet as the x-axis and the initial core water saturation as the y-axis. Based on the oil-water flow model, the nonlinear least squares method was used to fit the data in the scatter plot to obtain the relationship between different tilt angles and the water content of fracture cores. Based on the relationship between the water content of fracture cores at different inclination angles, the water saturation of standard fracture cores at different inclination angles is calculated.

2. The method according to claim 1, characterized in that, The output data includes the pressure at both ends of the core holder device and the liquid output and water production at the liquid outlet.

3. The method according to claim 2, characterized in that, One end of the core clamp device is connected to a water injection pipeline, an oil injection pipeline, and a pressure measuring device. The other end is connected to the liquid outlet line and pressure testing device.

4. The method according to claim 2, characterized in that, The formula for calculating the initial core water saturation is as follows: Where, q w (t) represents the cumulative water injection volume at time t, in ml; Q w (t) represents the cumulative water production at time t, in mL; PV represents the core pore volume, in mL.

5. The method according to claim 1, characterized in that, The formula for calculating the water saturation of the standard fracture core is as follows: Among them, C θ and n θ These are the coefficients to be fitted with respect to angle θ; f w The water content in the produced liquid, %; S w The water saturation of the core is expressed as %.

6. The method according to claim 1, characterized in that, Also includes: Based on the relationship between different inclination angles and core water content, indicator charts were drawn showing the relationship between outlet water content and core saturation at different inclination angles.

7. A system for determining the water saturation of fractured-cavitary media cores, characterized in that, include: Data acquisition module: Acquires core production data under different dip angles and different oil-water injection ratios; Data processing module: Calculates the output data to obtain the initial core water saturation; A scatter plot of water saturation versus water content is drawn with water content at the core outlet as the x-axis and the initial core water saturation as the y-axis. Based on the oil-water flow model, the nonlinear least squares method was used to fit the data in the scatter plot to obtain the relationship between different tilt angles and the water content of fracture cores. The result calculation module calculates the water saturation of standard fracture cores at different inclination angles based on the relationship between the water content of the cores at different inclination angles.

8. An electronic device, characterized in that, include: The method for determining the water saturation of fractured-cavity core as described in any one of claims 1 to 6 includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for determining the water saturation of fractured-cavity core as described in any one of claims 1 to 6.

9. A computer storage medium, characterized in that, The computer storage medium stores a computer program, which, when executed by a processor, implements the steps in the method for determining the water saturation of fractured-cavity core as described in any one of claims 1 to 6.

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