Method and device for evaluating porosity of clay bound water in high-argillaceous loose formation

Abstract

The invention relates to the technical field of oil exploration and development, and discloses a high-argillaceous loose stratum clay bound water porosity evaluation method and device, and the method comprises the steps: measuring the nuclear magnetic porosity of a saturated water core, and weighing the saturated water core; drying the saturated water rock core and weighing the dried rock core; calculating the clay bound water porosity of the rock core according to the mass of the saturated water rock core, the nuclear magnetic porosity of the saturated water rock core and the mass of the dried rock core; calculating a clay bound water nuclear magnetism T2 cutoff value according to the clay bound water porosity; establishing a corresponding relation between the clay bound water nuclear magnetism T2 cutoff value and the clay content; and calculating the formation clay bound water porosity according to the continuous depth of the corresponding relation. The method is designed according to the characteristics of the high-argillaceous loose rock, and compared with a previous high-argillaceous loose stratum clay bound water porosity evaluation method, the method has better applicability and precision.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum exploration and development, and in particular to a method and device for evaluating the bound water porosity of clay in a high-mud loose formation. Background Art

[0002] Highly muddy and loose formations are usually formed in the early diagenetic stage and have the characteristics of weak diagenesis and high mud content, resulting in high reservoir porosity, low permeability, a high proportion of small pores, and high irreducible water saturation, which brings great difficulties to the identification of reservoir fluid properties and the evaluation of reserve potential.

[0003] Irreduced water can be divided into capillary-bound water and clay-bound water. The porosity of clay-bound water plays a crucial role in water saturation calculations, fluid property identification, and oil and gas reserve determination. Clay-bound water is a thin film of polar water molecules adsorbed by clay mineral particles, forming on the clay surface. This water film is held to the clay particles by electrostatic attraction and is generally immobile. Although thin, the clay film possesses a large surface area due to the extremely fine clay particles, allowing it to adsorb a large number of polar water molecules. This significantly affects rock conductivity, leading to significant differences in logging responses such as resistivity, nuclear magnetic resonance (NMR), neutron, and density. Therefore, evaluating clay-bound water is crucial for studying the relationships between reservoir lithology, electrical properties, physical properties, and hydrocarbon potential.

[0004] There are three conventional methods for evaluating clay bound water porosity. The first is to use core nuclear magnetic resonance and cation exchange combined test to calculate clay bound water porosity based on cation exchange capacity. This method is difficult to test, requires many parameters to be determined, is inconvenient to operate in practice, and has poor accuracy (Lu Yunlong et al., "A New Method for Calculating Clay Bound Water by Nuclear Magnetic Resonance Logging", Petroleum Geophysical Exploration, 2022, 57(3): 713-718). The second method is to use nuclear magnetic resonance logging data to calculate the porosity with a T2 value less than 3 milliseconds, which is considered to be equivalent to clay bound water porosity. This method is usually applicable to conventional sandstone. The third method is to use a combination of centrifugation and nuclear magnetic resonance experiments to determine the T2 cutoff value, and then calculate the clay bound water porosity (Xiang Xuebing et al., "Pore fluid division and effective pore size calculation of shale gas reservoirs - a case study of the Longtan Formation in the Sichuan Basin", Lithologic Reservoirs, 2021, 33(4): 137-146; Jiang Yuqiang et al., "Pore effectiveness evaluation of marine shale reservoirs in western Chongqing", Acta Petrolei Sinica, 2019, 40(10): 1233-1243; Li Xiang et al., "Microscopic pore structure characteristics of shale oil reservoirs and identification methods of multiple types of pore fluids", 2021, CN113533156A). Due to the weak consolidation degree of the core of the high-mud loose formation, the clamp cannot be used during the experiment, which is easy to damage the core; the conventional water soaking method cannot be used to saturate the core, which is easy to disperse; the centrifugal method cannot be used to evaluate the bound water, which is easy to cause lithologic differentiation during the centrifugation process. Experiments on cores from highly argillaceous and loose formations are very difficult, and the experiments are single-point evaluations. How to conduct continuous depth evaluation of the clay-bound water porosity in highly argillaceous and loose formations is an urgent problem that needs to be solved. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the above-mentioned technologies to a certain extent. To this end, the present invention proposes a method for evaluating the bound water porosity of clay in highly argillaceous loose formations, comprising:

[0006] Measure the nuclear magnetic porosity of water-saturated cores and weigh them;

[0007] Dry the water-saturated core and weigh the dried core;

[0008] Calculate the clay-bound water porosity of the core according to the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core;

[0009] The clay bound water NMR T2 cutoff value was calculated based on the clay bound water porosity;

[0010] Establish the corresponding relationship between the clay bound water NMR T2 cutoff value and clay content;

[0011] The bound water porosity of the formation clay is calculated continuously in depth according to the corresponding relationship.

[0012] Preferably, the method for preparing the water-saturated high-argillaceous loose core comprises: placing the high-argillaceous loose core in a 100% humidity environment to convert it into a water-saturated high-argillaceous loose core.

[0013] Preferably, drying the water-saturated core comprises drying the water-saturated core by gradually increasing the temperature, weighing the core before each temperature increase, and determining that the core drying is complete when the core weight obtained by two adjacent weighings does not change.

[0014] Preferably, when calculating the clay-bound water porosity of the core based on the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core, the formula used includes:

[0015]

[0016]

[0017] in, represents the clay bound water porosity; φ t represents the nuclear magnetic porosity of the water-saturated core; φ e represents the effective porosity of the core; M1 represents the mass of the water-saturated core; M2 represents the mass of the dried core; V is the core volume; ρ w is the density of water.

[0018] Preferably, when calculating the bound water nuclear magnetic T2 cutoff value based on the bound water porosity of clay, the formula used includes:

[0019]

[0020]

[0021] in, represents the clay bound water porosity; T 2cutoff represents the clay-bound water NMR T2 cutoff value; Indicates the porosity component value when the relaxation time is T2.

[0022] Preferably, establishing a correspondence between the clay bound water NMR t2 cutoff value and the clay content includes: fitting the correspondence through the core clay bound water NMR T2 cutoff value and the clay content determined by X-ray diffraction.

[0023] Preferably, calculating the irreducible water porosity of clay in the formation with continuous depth according to the corresponding relationship includes:

[0024] Calculate clay content at successive depths using well logs;

[0025] Based on the clay content and the corresponding relationship, the clay-bound water porosity of the formation is calculated continuously with depth, and the formula used includes:

[0026]

[0027]

[0028] Where GR is the natural gamma ray logging curve value at the current depth point; GR min is the characteristic value of the natural gamma ray curve of the pure sandstone section of the target layer; GR max is the characteristic value of the natural gamma ray curve of the pure mudstone section of the target layer; c is the empirical coefficient related to the stratigraphic age.

[0029] A second aspect of the present invention provides a system for evaluating the bound water porosity of clay in highly argillaceous loose formations, comprising:

[0030] The first weighing module is used to measure the nuclear magnetic porosity of the water-saturated core and weigh it;

[0031] The second weighing module is used to dry the water-saturated core and weigh the dried core;

[0032] A first calculation module is used to calculate the clay-bound water porosity of the core according to the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core;

[0033] The second calculation module is used to calculate the clay bound water nuclear magnetic T2 cutoff value according to the clay bound water porosity;

[0034] A relationship building module is used to establish the corresponding relationship between the clay bound water NMR T2 cutoff value and the clay content;

[0035] The third calculation module is used to calculate the irreducible water porosity of the formation clay at a continuous depth according to the corresponding relationship.

[0036] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program or instructions, and when the computer program or instructions are executed by the processor, they are at least used to implement the above method.

[0037] A fourth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program or instructions, and when the computer program or instructions are executed by a processor, they are at least used to implement the above-mentioned method.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] This method addresses the characteristics of cores in highly argillaceous, loose formations, such as pressure deformation and water-soaked spalling. It uses intensive temperature-raising experiments to determine the drying temperature of cores in highly argillaceous, loose formations. Based on this, a combined nuclear magnetic resonance and gravimetric method is used to determine the clay-bound water porosity. This, in turn, determines the clay-bound water nuclear magnetic resonance T2 cutoff value. A functional relationship between the nuclear magnetic resonance T2 cutoff value and clay content is then established, enabling continuous depth-based assessment of clay-bound water porosity. This method, designed specifically for the characteristics of highly argillaceous, loose formations, offers improved applicability and accuracy compared to previous methods, providing essential parameters for identifying fluid properties and evaluating reserve potential in highly argillaceous reservoirs.

[0040] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0041] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 This is a schematic diagram of the evaluation method for clay-bound water porosity in highly argillaceous loose formations;

[0044] Figure 2 Schematic diagram of pore fluid types given for the example;

[0045] Figure 3 Schematic diagram of temperature and mass changes during the core drying process given in the embodiment;

[0046] Figure 4 Schematic diagram of the method for determining the NMR T2 cutoff value given in the embodiment;

[0047] Figure 5 The cross-plot of clay content and NMR T2 cutoff value given in the examples;

[0048] Figure 6 Schematic diagram of clay bound water porosity treatment given in the embodiment;

[0049] Figure 7 This is a schematic diagram of the clay bound water porosity evaluation system for highly argillaceous loose formations;

[0050] Figure 8 A schematic diagram of an electronic device provided in an embodiment;

[0051] Figure 9 A schematic diagram of a computer-readable storage medium according to an embodiment. DETAILED DESCRIPTION

[0052] The present invention is described below with reference to the accompanying drawings. The preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0053] Figure 1 The present invention provides a method for evaluating the bound water porosity of clay in a high-mud loose formation, comprising:

[0054] S101. Measure the nuclear magnetic porosity of the water-saturated core and weigh it;

[0055] S102. Dry the water-saturated core and weigh the dried core;

[0056] S103. Calculate the clay-bound water porosity of the core according to the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core;

[0057] S104. Calculating the clay bound water NMR T2 cutoff value based on the clay bound water porosity;

[0058] S105. Establish the corresponding relationship between the clay bound water NMR T2 cutoff value and the mud content;

[0059] S106. Calculate the bound water porosity of the formation clay continuously at different depths according to the corresponding relationship.

[0060] Water-saturated core refers to a core that is saturated with water to obtain 100% water content. Figure 2 This is a schematic diagram of pore fluid types provided in an embodiment. From top to bottom, the white portion represents the skeleton, and the remaining portions represent pores. The gray portion represents movable water, the dark gray portion represents capillary bound water, and the black portion represents clay bound water. According to some embodiments of the present invention, methods for preparing water-saturated cores include: a first saturation method is to place the core in a sealed container filled with water and leave it for 48 hours, which is applicable to conventional reservoir cores; a second saturation method is to place the sample in a drying oven and dry it at 90°C for at least 48 hours. After confirming that the sample quality has not changed, vacuum saturation is performed and pressurized to 25 MPa for 48 hours, which is applicable to tight reservoir cores. For highly argillaceous, loose cores, which are prone to pressure deformation and water spalling, the first and second saturation methods cannot be used. Instead, the core sample is directly placed in a 100% humidity environment for a certain period of time (72 hours in this embodiment) to saturate it with water, taking advantage of the core's high clay content and its ability to absorb water.

[0061] According to some embodiments of the present invention, nuclear magnetic porosity is obtained by measuring the hydrogen nuclear signal of a 100% water-saturated core using a nuclear magnetic instrument. The porosity is obtained by data processing. Since the core is 100% water-containing, the hydrogen nuclear signal in all pores can be measured. Therefore, the porosity measured at this time is the total porosity, which is hereinafter referred to as φ. t Total porosity is the ratio of the sum of the volumes of all pore spaces in a rock sample to the volume of the rock sample, expressed as a percentage or decimal.

[0062] According to some embodiments of the present invention, the process of drying and weighing a water-saturated core includes drying the water-saturated core by gradually increasing the temperature, weighing the core before each temperature increase, and determining that the core drying is complete when the core weight obtained from two consecutive weighings does not change (the core is weighed at each temperature value). It should be noted that clay-bound water is a thin water film formed on the surface of clay mineral particles by polar water molecules adsorbed on the clay surface. It is attracted to the surface of the clay particles by electrostatic attraction and is generally not easy to move.

[0063] Figure 3 This is a schematic diagram of the change in core weight with core temperature during the core drying process given in the embodiment. The horizontal axis in the figure is temperature, in ° C, with a scale from 20 to 140. From 30 ° C to 60 ° C, the core mass is measured every 10 ° C, from 60 ° C to 70 ° C, the mass is measured every 1 ° C, from 70 ° C to 80 ° C, the mass is measured every 5 ° C, and from 80 ° C to 120 ° C, the mass is measured every 10 ° C; the vertical axis is mass, in g, with a scale from 18 to 22; the dotted line is the temperature corresponding to the substantially unchanged mass.

[0064] According to some embodiments of the present invention, the clay-bound water porosity is calculated by calculating the ratio of the volume of clay-bound water to the volume of the core, which is usually calculated by subtracting the effective porosity from the total porosity. The effective porosity is the ratio of the interconnected pores in the rock to the volume of the rock sample, hereinafter referred to as φ e In this process, the calculation formulas used include:

[0065]

[0066]

[0067] in, represents the clay bound water porosity; φ t represents the nuclear magnetic porosity of the water-saturated core; φ e represents the effective porosity of the core; M1 represents the mass of the water-saturated core; M2 represents the mass of the dried core; V is the core volume; ρ w is the density of water.

[0068] According to some embodiments of the present invention, determining the clay-bound water nuclear magnetic resonance T2 cutoff value is to calculate the porosity between the T2 values ​​of zero and the T2 cutoff value, making it equal to the clay-bound water porosity, thereby determining the T2 cutoff value. The clay-bound water nuclear magnetic resonance T2 cutoff value is a numerical value, representing that the portion below this value belongs to clay-bound water, and the unit is usually ms. Calculating the porosity between the T2 values ​​of zero and the T2 cutoff value, making it equal to the clay-bound water porosity, thereby determining the T2 cutoff value, in this process, the calculation formula used includes:

[0069]

[0070]

[0071] in, represents the clay bound water porosity; T 2cutoff represents the clay-bound water NMR T2 cutoff value; Indicates the porosity component value when the relaxation time is T2.

[0072] Figure 4 Schematic diagram of the method for determining the nuclear magnetic resonance T2 cutoff value given in the embodiment. The horizontal axis is time, on a logarithmic scale, in milliseconds (ms); the vertical axis is divided into two left and right axes. The left side is the porosity component, in %, and the right side is the porosity accumulation, in %. The maximum value of the short dash line corresponds to the total porosity of the core, the closed area of ​​the black curve represents the porosity, and the area included by the dotted line and the black curve is the clay-bound water porosity.

[0073] According to some embodiments of the present invention, the relationship between the bound water NMR T2 cutoff value and the clay content is established by converting T 2cutoff A functional relationship is established with the clay content obtained by X-ray diffraction analysis of the corresponding core, and the clay content is used to characterize T 2cutoff X-ray diffraction analysis determines mineral type based on the size of the peaks in the X-ray diffraction pattern, and then determines the diffraction intensity based on the peak height and area, allowing for quantitative analysis of rock minerals. The primary instrument used in this experiment is an X-ray diffractometer. Samples for X-ray diffraction analysis are primarily powdered samples, which are ground into a fine powder before testing. For quantitative analysis, the sample should be ground to approximately 10 microns. Figure 5 The cross-plot of the nuclear magnetic T2 cutoff value and clay content given in the embodiment, the horizontal axis is the clay content, the unit is decimal, the scale is from 0 to 0.8; the vertical axis is the nuclear magnetic T2 cutoff value, the unit is milliseconds, and the nuclear magnetic T2 cutoff value increases with the increase of clay content. 2cutoff The functional relationship between the clay content obtained by X-ray diffraction analysis of the corresponding core is to make T 2cutoff With clay content V clayThe cross-plot of the two is used to fit the relationship between them. The relationship between the two can be linear or nonlinear. The continuous depth calculation of clay bound water porosity is to use the logging data to continuously calculate the clay content V clay , and then use V clay With T 2cutoff The relationship calculation T 2cutoff , and finally use T 2Cutoff Calculate clay bound water porosity. Calculate clay content at continuous depth using logging data. This is done using natural gamma ray logs (GR) or other logging curves. Taking the natural gamma ray log as an example, the formula is:

[0074]

[0075]

[0076] Where GR is the natural gamma ray logging curve value at the current depth point; GR min is the characteristic value of the natural gamma ray curve of the pure sandstone section of the target layer; GR max is the characteristic value of the natural gamma ray curve of the pure mudstone section of the target layer; c is the empirical coefficient related to the stratigraphic age, which is 2.0 for strata after the Tertiary and 3.7 for strata before and after the Tertiary.

[0077] According to some embodiments of the present invention, using V clay With T 2cutoff The relationship calculation T 2cutoff Is to use V clay With T 2cutoff Calculate the functional relationship T 2cutoff , using T 2cutoff The calculation of clay bound water porosity is to use nuclear magnetic logging data to continuously calculate the clay bound water porosity at different depths. This calculation process can be achieved through the above formula.

[0078] Figure 6The following is a schematic diagram of the clay bound water porosity processing results given in the embodiment. The first track in the figure is the lithology indicator track, the solid line is the conventional natural gamma curve, and the short dashed line is the wellbore curve. The natural gamma curve mainly represents the change in lithology, and the wellbore curve mainly indicates the quality of the wellbore. The second track is the depth track, which indicates the distance between the measured well section (i.e., the target layer) and the wellhead. The third track is the three-porosity curve track, the solid line is the acoustic time difference curve (AC), the short dashed line is the volume density curve (DEN), and the dotted line is the compensated neutron curve (CNL). All three curves can calculate the size of the porosity and characterize the physical properties of the formation. The fourth track is the resistivity curve track, the solid line is the deep array induction resistivity curve (AT90), the short dashed line is the medium array induction resistivity curve (AT60), and the dotted line is the shallow array induction resistivity curve (AT20). The resistivity curve mainly represents the conductivity of the formation rock, and then evaluates the formation lithology, fluid properties, etc. Track 5 shows the clay content, with the solid line representing the clay content (Vclay) calculated from the natural gamma ray curve. Track 6 shows the NMR T2 cutoff, with the solid line representing the NMR T2 cutoff calculated from the clay content curve. Track 7 shows the NMR T2 spectrum, which characterizes the quality of the pore structure. Track 8 shows the clay-bound water porosity, with the solid line representing the calculated clay-bound water porosity.

[0079] Based on the same inventive concept, this application proposes a system for evaluating the bound water porosity of clay in high-mud loose formations. Figure 7 Shown, including:

[0080] The first weighing module 201 is used to measure the nuclear magnetic porosity of the water-saturated core and weigh it; the second weighing module 202 is used to dry the water-saturated core and weigh the dried core; the first calculation module 203 is used to calculate the clay-bound water porosity of the core based on the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core; the second calculation module 204 is used to calculate the bound water nuclear magnetic T2 cutoff value based on the clay-bound water porosity; the relationship construction module 205 is used to establish a corresponding relationship between the bound water nuclear magnetic T2 cutoff value and the clay content; and the third calculation module 206 is used to continuously calculate the clay-bound water porosity of the formation based on the corresponding relationship.

[0081] In addition, the present invention also provides an electronic device 1000, comprising a memory 1002 and a processor 1001. Memory 1002 stores a computer program or instructions. When executed by processor 1001, the computer program or instructions are configured to implement at least the aforementioned method for calculating the irreducible water porosity of a highly shaly and loose formation. Furthermore, the present invention also provides a computer-readable storage medium 1100. The computer-readable storage medium 1100 stores a computer program or instructions. When executed by the processor, the computer program or instructions are configured to implement at least the aforementioned method for calculating the irreducible water porosity of a highly shaly and loose formation.

[0082] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for evaluating the bound water porosity of clay in highly argillaceous loose formations, characterized in that: include: Measure the nuclear magnetic porosity of water-saturated cores and weigh them; Dry the water-saturated core and weigh the dried core; Calculate the clay-bound water porosity of the core according to the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core; The clay bound water NMR T2 cutoff value was calculated based on the clay bound water porosity; Establish the corresponding relationship between the clay bound water NMR T2 cutoff value and clay content; The bound water porosity of the formation clay is calculated continuously in depth according to the corresponding relationship.

2. The calculation method according to claim 1, wherein: The method for preparing a water-saturated high-argillaceous loose core comprises: placing the high-argillaceous loose core in a 100% humidity environment to convert the core into a water-saturated high-argillaceous loose core.

3. The calculation method according to claim 1, wherein: The water-saturated core is dried, comprising: drying the water-saturated core by gradually increasing the temperature, weighing the core before each temperature increase, and determining that the core drying is completed when the core weight obtained by two consecutive weighings does not change.

4. The calculation method according to claim 1, wherein: When calculating the clay-bound water porosity of the core based on the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core, the formula used includes: in, represents the clay bound water porosity; φ t represents the nuclear magnetic porosity of the water-saturated core; φ e represents the effective porosity of the core; M1 represents the mass of the water-saturated core; M2 represents the mass of the dried core; V is the core volume; ρ w is the density of water.

5. The calculation method according to claim 1, wherein: When calculating the bound water NMR T2 cutoff value based on the bound water porosity of clay, the formula used includes: in, represents the clay bound water porosity; T 2cutoff represents the clay-bound water NMR T2 cutoff value; Indicates the porosity component value when the relaxation time is T2.

6. The calculation method according to claim 1, wherein: Establishing a corresponding relationship between the clay bound water nuclear magnetic resonance T2 cutoff value and the clay content includes: fitting the corresponding relationship through the clay bound water nuclear magnetic resonance T2 cutoff value of the core and the clay content determined by X-ray diffraction.

7. The calculation method according to claim 6, wherein: The continuous depth calculation of the irreducible water porosity of the formation clay according to the corresponding relationship includes: Calculate clay content at successive depths using well logs; Based on the clay content and the corresponding relationship, the clay-bound water porosity of the formation is calculated continuously with depth, and the formula used includes: Where GR is the natural gamma ray logging curve value at the current depth point; GR min is the characteristic value of the natural gamma ray curve of the pure sandstone section of the target layer; GR max is the characteristic value of the natural gamma ray curve of the pure mudstone section of the target layer; c is the empirical coefficient related to the stratigraphic age.

8. A system for evaluating the bound water porosity of clay in highly argillaceous loose formations, characterized by: include: The first weighing module is used to measure the nuclear magnetic porosity of the water-saturated core and weigh it; The second weighing module is used to dry the water-saturated core and weigh the dried core; A first calculation module is used to calculate the clay-bound water porosity of the core according to the mass of the water-saturated core, the nuclear magnetic porosity of the water-saturated core, and the mass of the dried core; The second calculation module is used to calculate the clay bound water nuclear magnetic T2 cutoff value according to the clay bound water porosity; A relationship building module is used to establish the corresponding relationship between the clay bound water NMR T2 cutoff value and the clay content; The third calculation module is used to calculate the irreducible water porosity of the formation clay at a continuous depth according to the corresponding relationship.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program or instruction, and when the computer program or instruction is executed by the processor, it is used to implement at least the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instructions, which, when executed by a processor, are used to at least implement the method according to any one of claims 1 to 7.

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