Salt cavern volume detection method, device, equipment and medium

Abstract

The embodiment of the invention discloses a salt cavern volume detection method and device, equipment and a medium. The method comprises the following steps: acquiring at least two groups of parameter associated data of a salt cavern cavity corresponding to a target salt cavern; each group of parameter associated data is used for indicating wellhead pressure variation and brine injection volume after brine is injected into a salt cavern cavity corresponding to the target salt cavern every time; determining a target change rate of a salt cavern cavity corresponding to the target salt cavern according to the at least two groups of parameter associated data; the target change rate is the change amount of wellhead pressure after the unit brine injection volume is increased in a salt cavern cavity corresponding to the target salt cavern; and determining the salt cavern volume of the target salt cavern according to the target change rate and the brine volume modulus. According to the technical scheme, based on the compressibility principle of brine, the salt cavern volume of the target salt cavern can be rapidly and accurately calculated, compared with a sound wave cavity measuring mode, introduction of sound wave equipment and a measuring team is not needed, and the cost of measuring the salt cavern volume is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of salt cavern gas storage cavity making, and in particular to a salt cavern volume detection method, device, equipment and medium. Background Art

[0002] Salt cavern gas storage is an underground cave formed by injecting fresh water into thicker underground salt layers or salt domes to dissolve the salt layers using the water-soluble mining method, and then discharging the saturated or nearly saturated brine.

[0003] At present, the volume of underground salt caverns is mainly calculated through sonar cavity measurement results, but the construction cost of sonar cavity measurement is high, the operation time is long, and the data processing is complicated. When the cavity shape is complex, sonar cannot perform accurate measurement. Summary of the invention

[0004] The present invention provides a method, device, equipment and medium for detecting the volume of a salt cavern, which can quickly and accurately measure the volume of underground salt caverns of various forms.

[0005] According to one aspect of the present invention, a method for detecting the volume of a salt cavern is provided, the method comprising:

[0006] At least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern are obtained; each set of the parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after each injection of brine into the salt cavern cavity corresponding to the target salt cavern; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine;

[0007] Determine a target change rate of the salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data; the target change rate is a change in the wellhead pressure after a unit brine injection volume is increased in the salt cavern cavity corresponding to the target salt cavern;

[0008] The salt cavern volume of the target salt cavern is determined according to the target change rate and the brine bulk modulus.

[0009] According to another aspect of the present invention, a device for detecting the volume of a salt cavern is provided, comprising:

[0010] A parameter association data acquisition module is used to acquire at least two sets of parameter association data of a salt cavern cavity corresponding to a target salt cavern; each set of the parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after brine is injected into the salt cavern cavity corresponding to the target salt cavern each time; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine;

[0011] A target change rate determination module is used to determine a target change rate of the salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data; the target change rate is a change in the wellhead pressure after a unit brine injection volume is increased in the salt cavern cavity corresponding to the target salt cavern;

[0012] The salt cavern volume determination module is used to determine the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for detecting the volume of the salt cavern according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for detecting the volume of a salt cavern according to any embodiment of the present invention when executed.

[0018] The technical solution of the embodiment of the present application includes: obtaining at least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern; each set of the parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after each injection of brine into the salt cavern cavity corresponding to the target salt cavern; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine; according to the at least two sets of parameter association data, determining the target change rate of the salt cavern cavity corresponding to the target salt cavern; the target change rate is the change in wellhead pressure after increasing the unit brine injection volume in the salt cavern cavity corresponding to the target salt cavern; determining the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus. Based on the compressibility of brine, the technical solution can quickly and accurately calculate the salt cavern volume of the target salt cavern according to at least two sets of parameter association data and the bulk modulus of brine, and in the process of determining the salt cavern volume, compared with the acoustic wave cavity measurement method, no acoustic wave equipment and measurement team are required, which reduces the cost of measuring the salt cavern volume.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a flow chart of a method for detecting the volume of a salt cavern provided in accordance with Example 1 of the present application;

[0022] Figure 2 It is a schematic diagram of a cavity volume and a sediment pore volume provided according to Example 1 of the present application;

[0023] Figure 3 is a flow chart of a method for detecting the volume of a salt cavern provided in Example 2 of the present application;

[0024] Figure 4 is a schematic diagram of a fitting curve provided according to Example 2 of the present application;

[0025] Figure 5 It is a schematic diagram of a pressure difference and a volume difference provided according to the second embodiment of the present application;

[0026] Figure 6 This is a schematic diagram of pressure increment and fluid injection volume under an ideal condition provided in Example 2 of the present application;

[0027] Figure 7 It is a schematic diagram of measured data points provided according to the second embodiment of the present application;

[0028] Figure 8 is a schematic diagram of a specific example provided according to Embodiment 2 of the present application;

[0029] Fig. 9 It is a structural schematic diagram of a salt cavern volume detection device provided according to Example 3 of the present application;

[0030] Fig.10 It is a structural schematic diagram of an electronic device for implementing a method for detecting the volume of a salt cavern according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", "target", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] Figure 1 A flow chart of a method for detecting the volume of a salt cavern is provided for the first embodiment of the present application. The embodiment of the present application is applicable to the case of measuring the volume of a salt cavern. The method can be performed by a salt cavern volume detection device. The salt cavern volume detection device can be implemented in the form of hardware and / or software. The salt cavern volume detection device can be configured in an electronic device with data processing capabilities. Figure 1 As shown, the method includes:

[0035] S110, obtaining at least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern.

[0036] Among them, each group of parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after each injection of brine into the salt cavern cavity corresponding to the target salt cavern; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine.

[0037] The technical solution of the embodiment of the present application can pre-inject brine into the salt cavern cavity corresponding to the target salt cavern so that the salt cavern cavity corresponding to the target salt cavern is filled with brine. After the salt cavern cavity corresponding to the target salt cavern is filled with brine, brine is injected into the salt cavern cavity one by one. In this process, it is ensured that the injected brine enters the salt cavern cavity corresponding to the target salt cavern. Due to the compressibility of brine and the increasing amount of brine in the salt cavern cavity, the pressure in the salt cavern cavity corresponding to the target salt cavern will increase, that is, the wellhead pressure will increase. After each injection of brine, a set of parameter association data can be obtained. The salt cavern volume of the target salt cavern can be calculated based on the bulk modulus of the brine through at least two sets of parameter association data.

[0038] The change in wellhead pressure is used to indicate the change in wellhead pressure after each injection of brine into the salt cavern cavity corresponding to the target salt cavern, that is, the change in brine pressure at the wellhead. The brine injection volume is the volume of brine injected into the salt cavern cavity corresponding to the target salt cavern this time.

[0039] Specifically, in a feasible scheme, after the target salt cavern is filled with brine, the wellhead pressure is measured to obtain the initial wellhead pressure. At this time, the first set of parameter association data is obtained, and the brine injection volume of the parameter association data is zero, and the wellhead pressure change is also zero; then brine can be injected into the target salt cavern corresponding to the salt cavern through the wellhead, and the brine injected this time is recorded as the brine injection volume, and the difference between the wellhead pressure after the brine injection and the wellhead pressure before the brine injection is determined as the wellhead pressure change. It should be noted that each wellhead pressure change can be the wellhead pressure change relative to the wellhead pressure before the brine is injected (i.e., the wellhead pressure after each brine injection minus the wellhead pressure before the injection), or it can be the change relative to the initial wellhead pressure (i.e., the wellhead pressure after each brine injection minus the initial wellhead pressure). These two wellhead pressure changes are only different in form, and their essence can be converted into each other, so the specific form of the wellhead pressure change is not limited in the embodiment of the present application. Similarly, the brine injection volume can be the volume difference before and after each brine injection, or it can be the total injection volume accumulated from the first brine injection after each brine injection. These two forms of brine injection volume can also be converted into each other. The embodiments of the present application do not limit the specific form of the brine injection volume.

[0040] S120: Determine a target change rate of the salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data.

[0041] The target change rate is the change in wellhead pressure after a unit brine injection volume is increased in the salt cavern cavity corresponding to the target salt cavern.

[0042] Specifically, in a feasible scheme, after obtaining at least two sets of parameter association data, curve fitting can be performed on the at least two sets of parameter association data, for example, the position points of each set of parameter association data are marked in a rectangular coordinate system, and then curve fitting is performed based on each position point, and the slope of the fitting curve is determined as the target change rate. In another feasible scheme, since the wellhead pressure is small during the initial brine injection, the deformation of the target salt cavern is also small, so at least two sets of parameter association data corresponding to the first number of brine injections can be selected from the at least two sets of parameter association data, and then the target change rate is determined based on the selected parameter association data.

[0043] S130: Determine the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus.

[0044] The salt cavern volume includes the actual volume of the salt cavern, the sediment pore volume, and the cavity volume; Figure 2 As shown, Figure 2 is a schematic diagram of the cavity volume and the pore volume of the sediment. Figure 2 In the salt cavern, a salt cavern consists of a cavity and sediment. Since the sediment has pores that can hold brine, the actual volume of the salt cavern is equal to the sum of the cavity volume and the sediment pore volume.

[0045] For example, if the salt cavern volume is the actual volume of the salt cavern, the actual volume of the salt cavern can be calculated according to the target change rate and the brine bulk modulus. If the salt cavern volume is the sediment pore volume, it is necessary to calculate the actual volume of the salt cavern and then combine the sediment volume, sediment porosity and other parameters to calculate it. If the salt cavern volume is the cavity volume, after calculating the actual volume of the salt cavern and the sediment pore volume, the cavity volume is determined according to the difference between the actual volume of the salt cavern and the sediment pore volume.

[0046] The technical solution of the embodiment of the present application includes: obtaining at least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern; each set of the parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after each injection of brine into the salt cavern cavity corresponding to the target salt cavern; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine; according to the at least two sets of parameter association data, determining the target change rate of the salt cavern cavity corresponding to the target salt cavern; the target change rate is the change in wellhead pressure after increasing the unit brine injection volume in the salt cavern cavity corresponding to the target salt cavern; determining the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus. Based on the compressibility of brine, the technical solution can quickly and accurately calculate the salt cavern volume of the target salt cavern according to at least two sets of parameter association data and the bulk modulus of brine, and in the process of determining the salt cavern volume, compared with the acoustic wave cavity measurement method, no acoustic wave equipment and measurement team are required, which reduces the cost of measuring the salt cavern volume.

[0047] Embodiment 2

[0048] Figure 3 This is a flow chart of a method for detecting the volume of a salt cavern provided in Example 2 of the present application. This embodiment of the present application is optimized based on the above embodiment.

[0049] like Figure 3 As shown, the method of the embodiment of the present application specifically includes the following steps:

[0050] S210, obtaining at least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern.

[0051] Among them, each group of parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after each injection of brine into the salt cavern cavity corresponding to the target salt cavern; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine.

[0052] Exemplarily, the process of obtaining at least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern may be: calculating the brine bulk modulus according to the brine concentration and temperature in the salt cavern cavity corresponding to the target salt cavern; obtaining downhole core samples by staff, dissolving the cores, calculating the volume and proportion of residual impurities, and then compacting the impurities to simulate the bottom sediment of the target salt cavern, the compaction pressure is equal to the hydrostatic pressure at the bottom of the target salt cavern, and measuring parameters such as the elastic modulus, Poisson's ratio, porosity and pore compression coefficient of the compacted sediment. When the wellhead is full of brine, that is, the salt cavern cavity corresponding to the target salt cavern is full of brine, brine can be injected from the wellhead at this time to make the wellhead pressure change reach a preset pressure value (exemplarily, the preset pressure value can be 0.5MPa), and the real volume of the cavity is estimated; based on the first brine injection volume, an appropriate volume of brine is injected from the wellhead to keep the wellhead pressure change within a preset pressure range (exemplarily, the preset pressure range can be 0.5-1.5Mpa), and continuously record parameter-related data. To ensure the accuracy of the salt cavern volume calculation results, multiple groups (for example, more than 5 groups) of parameter-related data can be obtained during the entire test process, and each wellhead pressure change is kept within the preset pressure range. After each injection, the wellhead pressure should be recorded continuously for more than 30 minutes, and the pressure value recorded when the wellhead pressure remains stable is used as the calculation data. Until the internal pressure of the target salt cavern reaches a certain set value, which is lower than the expected maximum operating pressure of the target salt cavern; after recording the parameter association data, invalid parameter association data can be eliminated (the invalid parameter association data refers to parameter association data that is significantly different from other parameter association data and is obviously not near the fitting curve), and the salt cavern volume is calculated based on the valid parameter association data.

[0053] Optionally, during the brine injection process, the concentration of the injected brine is consistent with the brine in the salt cavern cavity. The injection volume of the first test is based on a wellhead pressure increase of 0.5 MPa, and the volume of injected brine is recorded; the subsequent test single injection volume is based on the first injection volume. If the wellhead pressure change is less than 0.5 MPa, the injection volume is appropriately increased to keep the wellhead pressure increment between 0.5 and 1.5 MPa. The parameter association data obtained in this way is more convenient for subsequent calculations, and the difference between the data is more reasonable.

[0054] S220, determining the position point corresponding to each group of the parameter association data in a reference rectangular coordinate system; the vertical axis of the reference rectangular coordinate system is the wellhead pressure change, and the horizontal axis is the brine injection volume.

[0055] Specifically, a reference rectangular coordinate system is established, the vertical axis of which is the change in wellhead pressure, and the horizontal axis is the brine injection volume. At the origin of the coordinate system, it reflects the state of the target salt cavern corresponding to the salt cavern cavity before the first brine injection, that is, the horizontal axis of the origin of the coordinate system represents the brine injection volume is zero, and the vertical axis represents the change in wellhead pressure is zero. In the embodiment of the present application, the brine injection volume in each set of parameter association data is the total volume of brine injected from the first time brine was injected to the current time. For example, if 50 cubic meters of brine is injected for the first time, the brine injection volume in the first set of parameter association data is 50 cubic meters, and if 52 cubic meters of brine is injected for the second time, the brine injection volume in the second set of parameter association data is 102 cubic meters. Similarly, the change in wellhead pressure in each set of parameter association data is the current wellhead pressure minus the initial wellhead pressure (the initial wellhead pressure is the pressure at the wellhead before the first injection of brine). For example, the wellhead pressure before the first injection of brine is 1MPa, and the wellhead pressure after the first injection of brine is 1.5MPa. The change in wellhead pressure in the first set of parameter association data is 0.5MPa. The wellhead pressure after the second injection of brine is 2.01MPa, and the change in wellhead pressure in the second set of parameter association data is 1.01MPa. The above-mentioned form of parameter association data can directly map each position point in the rectangular coordinate system, which is convenient for subsequent calculations.

[0056] It should be noted that, taking the wellhead pressure change as an example, if the wellhead pressure before the first injection of brine is 1MPa, and the wellhead pressure after the first injection of brine is 1.5MPa, then the wellhead pressure change in the first set of parameter association data can be 0.5MPa, and the wellhead pressure after the second injection of brine is 2.01MPa, then the wellhead pressure change in the second set of parameter association data can be 0.51MPa. When mapping this form of wellhead pressure change to the coordinate system, it needs to be adjusted to the current wellhead pressure minus the initial wellhead pressure before mapping.

[0057] S230, performing curve fitting based on the position points corresponding to each group of the parameter association data and the coordinate origin of the reference rectangular coordinate system to obtain a fitting curve.

[0058] Specifically, after obtaining the position points corresponding to each group of parameter association data, curve fitting is performed based on the coordinate origin of the reference rectangular coordinate system and each position point to obtain a fitting curve passing through the coordinate origin.

[0059] S240, determining the slope of the fitting curve at the coordinate origin as the target change rate of the salt cavern cavity corresponding to the target salt cavern.

[0060] Specifically, in the fitting curve, the slopes at different horizontal coordinates may be different, and the slope at the origin of the coordinate may be determined as the target slope.

[0061] It should be noted that, since the target salt cavern hardly deforms in the initial stage of brine injection, that is, the slope at the origin of the coordinate is least affected by the deformation of the target salt cavern, the slope at the origin of the coordinate is determined as the target slope.

[0062] S250: Determine the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus.

[0063] In an embodiment of the present application, optionally, if the salt cavern volume includes the true volume of the salt cavern, the salt cavern volume of the target salt cavern is determined according to the target change rate and the brine bulk modulus, including: determining the ratio of the brine bulk modulus to the target change rate as the true volume of the salt cavern of the target salt cavern.

[0064] Exemplarily, the actual volume of the salt cavern is calculated by the following formula:

[0065]

[0066] Among them, V r is the real volume of the salt cavern, K is the bulk modulus of brine, and k′ is the target change rate.

[0067] In the embodiment of the present application, optionally, the salt cavern volume includes the cavity volume of the salt cavern; then determining the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus includes steps A1-A5:

[0068] Step A1, determining parameter association data after injecting brine into the cavity of the target salt cavern for a specified number of times as target parameter association data.

[0069] The designated number of times may be predetermined, such as the first time, the second time, etc. It should be noted that, since the deformation of the target salt cavern is small when the brine is initially injected, the smaller the designated number of times, the more accurate the subsequent calculated result.

[0070] Step A2, determining a pressure difference and a volume difference according to the target change rate and the target parameter associated data; the pressure difference reflects the difference between the target wellhead pressure change in the target parameter associated data and the theoretical wellhead pressure change, and the volume difference reflects the difference between the target brine injection volume in the target parameter associated data and the theoretical brine injection volume; the theoretical wellhead pressure change is the wellhead pressure change after brine is injected into the cavity of the target salt cavern for a specified number of times without deformation of the salt cavern, and the theoretical brine injection volume is the brine injection volume of the brine injected at the specified time without deformation of the salt cavern.

[0071] In an embodiment of the present application, optionally, a pressure difference and a volume difference are determined according to the target change rate and target parameter associated data, including: determining a theoretical brine injection volume according to the target change rate and the target wellhead pressure change; determining a theoretical wellhead pressure change according to the target change rate and the target brine injection volume; determining the difference between the target brine injection volume and the theoretical brine injection volume as the volume difference, and determining the difference between the theoretical wellhead pressure change and the target wellhead pressure change as the pressure difference.

[0072] In an embodiment of the present application, optionally, determining the theoretical brine injection volume based on the target change rate and the target wellhead pressure change includes: determining the ratio of the target wellhead pressure change to the target change rate as the theoretical brine injection volume; determining the theoretical wellhead pressure change based on the target change rate and the target brine injection volume includes: determining the product of the target brine injection volume and the target change rate as the theoretical wellhead pressure change.

[0073] For example, Figure 4 is a schematic diagram of a fitting curve. Figure 4 In the figure, the horizontal axis is the brine injection volume, the vertical axis is the change in wellhead pressure, the solid line is the fitting curve, and the dotted line is the theoretical curve with a slope of the target change rate and passing through the origin of the coordinate system. The theoretical curve is the curve corresponding to the parameter correlation data under theoretical conditions. Figure 5 It is a schematic diagram of pressure difference and volume difference. Figure 5 In the figure, the horizontal axis is the brine injection volume, the vertical axis is the wellhead pressure change, the solid line is the fitting curve, the dotted line is the theoretical curve with the target change rate as the slope and passing through the origin of the coordinate system, k′ is the target change rate, and the points on the theoretical curve reflect the relationship between the wellhead pressure change and the brine injection volume under theoretical conditions. The dots on the solid line correspond to the target parameter correlation data. Figure 5 In the i is the volume difference, ΔP is the pressure difference. It can be seen that the volume difference is the difference between the target brine injection volume and the theoretical brine injection volume, and the pressure difference is the difference between the theoretical wellhead pressure change and the target wellhead pressure change.

[0074] Further, the process of determining the theoretical brine injection volume includes: calculating the ratio of the target wellhead pressure change to the target change rate to obtain the theoretical brine injection volume. The process of determining the theoretical wellhead pressure change includes: multiplying the target brine injection volume by the target change rate to obtain the theoretical wellhead pressure change.

[0075] Step A3, determining the sediment volume according to the volume difference, the pressure difference, the sediment porosity, the pore compression coefficient of the sediment and the compression coefficient of the brine.

[0076] In the embodiment of the present application, optionally, determining the sediment volume according to the volume difference, the pressure difference, the sediment porosity, the pore compression coefficient of the sediment and the compression coefficient of the brine includes:

[0077] The sediment volume is calculated by the following formula:

[0078]

[0079] Among them, V s is the sediment volume, ΔV i is the volume difference, ΔP is the pressure difference, is the sediment porosity, C s is the pore compression coefficient of the sediment, K -1 is the compression coefficient of brine, which is the reciprocal of the bulk modulus of brine.

[0080] It should be noted that the porosity of the sediment and the pore compression coefficient of the sediment refer to the values ​​measured after the sediment is compacted, and the compaction pressure is equal to the hydrostatic pressure at the bottom of the target salt cavern (simulating the bottom of the target salt cavern).

[0081] Step A4: determining the product of the sediment volume and the sediment porosity as the sediment pore volume.

[0082] Exemplarily, the sediment pore volume is determined according to the following formula:

[0083]

[0084] Among them, V sp is the pore volume of sediment, V s is the sediment volume, is the sediment porosity.

[0085] Step A5: Determine the difference between the actual volume of the salt cavern and the pore volume of the sediment as the cavity volume of the salt cavern.

[0086] Specifically, the cavity volume is calculated according to the following formula:

[0087] V e =V r -V sp ;

[0088] Among them, V e is the cavity volume, V r is the actual volume of the salt cavern, V sp is the pore volume of sediment.

[0089] The technical solution of the embodiment of the present application obtains the volume difference and pressure difference by calculating the theoretical brine injection volume and the theoretical wellhead pressure change corresponding to the target parameter association data under theoretical conditions, and then calculates the sediment pore volume of the target salt cavern. The cavity volume of the target salt cavern is obtained by subtracting the sediment pore volume from the actual volume of the salt cavern, thereby achieving the effect of quickly and accurately calculating the salt cavern volume of the target salt cavern.

[0090] The principle of the technical solution of the embodiment of the present application is described in detail here:

[0091] The following formula is the relationship between pressure increment and volume compression when the total amount of fluid remains unchanged:

[0092]

[0093] Where: dP is the pressure increment; K is the bulk modulus of the fluid; V is the volume of the fluid before compression; dV is the volume compression.

[0094] Since a large amount of sediment will be deposited at the bottom of the salt cavern during the dissolution process, the real volume of the salt cavern in the salt cavern cavity should be the volume of the salt cavern minus the sediment volume plus the sediment pore volume. Assuming that the real volume of the salt cavern remains unchanged, the volume of fluid injected into the cavity is the volume compression, which is positively correlated with the pressure increment. Therefore, the relationship between the pressure increment and the volume compression can be simplified as follows:

[0095]

[0096] Where: dP is the pressure increment, V r is the actual volume of the salt cavern, dV i is the fluid injection volume, and K is the fluid bulk modulus (the fluid in the salt cavern is brine).

[0097] Where dP and dV i The relationship is as Figure 6 As shown:

[0098] The slope k of the curve is the ratio of the fluid bulk modulus to the actual volume of the salt cavern.

[0099] In the actual test operation, as the fluid is injected into the salt cavern, the pressure in the cavity rises and the deformable volume of the salt cavern expands by dV. d (Due to the short test time, the change in the salt cavern volume is considered to be entirely caused by the elastic deformation of the salt rock and does not involve the creep of the salt rock); and as the pressure in the cavity increases, the pore volume in the sediment expands by dV s The above volume changes caused by the increase of pressure will affect the accurate calculation of the cavity volume. Therefore, based on the consideration of solid deformation, the formula 2 was optimized according to the test method of intermittent injection of fluid in the actual measurement:

[0100]

[0101] Where: the subscript j represents the number of times brine is injected, dP j V is the change in wellhead pressure during the injection of brine. r is the actual volume of the salt cavern; dV dj is the volume expansion of the salt cavern after the injection of brine, dV ij is the volume of brine injected this time, dV sj It is the expansion capacity of the pore volume of the bottom sediment during the injection of brine. For the convenience of measurement and calculation, all the above values ​​are positive.

[0102] According to the above formula, the actual test results dP and dV i The relationship is as Figure 7 The measured data points are shown in the figure, and the dotted line is the ideal curve. Figure 6 :

[0103] like Figure 7 As shown in the figure, the measured data can be used to know the pressure change at the wellhead after each injection of a certain volume of fluid, which can be used to form a curve. Under the influence of the cavity expansion volume and the sediment pore volume expansion, the actual volume Vr of the salt cavern calculated based on the measured data using formula (2) has a large error. In order to eliminate the influence of the error, multiple tests should be carried out within the allowable range, and the curve should be formed by fitting all the valid test point data and the (0,0) point, as shown in the figure. Figure 4 As shown:

[0104] Based on the fitting curve expression, the derivative k′ at the point (0,0) is obtained, and the more accurate real volume of the salt cavern can be obtained according to the following formula:

[0105]

[0106] Since the pressure increments at the first two measuring points are small and the hardness of the salt rock is much greater than that of the sediment, it can be assumed that the volume expansion capacity of the salt cavern dV d is 0, and the pore volume expansion capacity dV of the bottom sediment is obtained s Equal to ΔV i ,from Figure 5 Read ΔV i Finally, the sediment volume Vs can be estimated using the following formula:

[0107]

[0108] Among them, V s is the sediment volume, ΔV i is the volume difference, ΔP is the pressure difference, is the sediment porosity, C s is the pore compression coefficient of the sediment, K-1 is the compression coefficient of brine, which is the reciprocal of the bulk modulus of brine.

[0109] Exemplarily, the sediment pore volume is determined according to the following formula:

[0110]

[0111] Among them, V sp is the pore volume of sediment, V s is the sediment volume, is the sediment porosity.

[0112] Exemplarily, the cavity volume is calculated according to the following formula:

[0113] V e =V r -V sp (Formula 7);

[0114] Among them, V e is the cavity volume, V r is the actual volume of the salt cavern, V sp is the pore volume of sediment.

[0115] For example, in a specific implementation example, the bulk modulus of brine in the physical environment of the salt cave is 2.2×10 9 Pa; the porosity of the bottom sediment after compaction is 0.2, and the pore compression coefficient is 2.0×10 -10 Pa -1 .

[0116] (1) The first test continuously injected 52.3m 3 After the brine was injected, the wellhead pressure increased by 0.5MPa. To ensure the effectiveness of the test point, 60m 3 brine;

[0117] (2) A total of five tests were conducted. The first test injected 52.3 m of saturated brine. 3 The wellhead pressure increased by 0.5 MPa; the saturated brine was injected for 60 m3 for the second and third times. 3 The wellhead pressure increased by 0.55 and 0.51 MPa respectively; the saturated brine was injected for 70 m 3 The wellhead pressure increases by 0.60 and 0.52 MPa. Based on the above five measuring points and the (0,0) point, the relationship curve between dP and dVi is fitted and the expression is obtained, as shown in Figure 8 As shown:

[0118] (3) Based on Figure 8 From the relationship, we can see that the slope k′ of the curve at (0,0) is 0.0096. Substituting it into Formula 4, we can get the actual volume Vr of the salt cavern to be about 229167m3 .

[0119] (4) Since the pressure increment at the first measuring point is small and the hardness of the salt rock is much greater than that of the sediment, it can be assumed that the volume expansion capacity of the salt cavern is 0, and then the pore volume expansion capacity of the bottom sediment is equal to the volume difference. Figure 8 The volume difference is determined to be 3.25m 3 Using Formula 5, we can roughly estimate the sediment volume to be approximately 54154m 3 .

[0120] (5) According to Formula 6 and Formula 7, the pore volume of the sediment can be calculated to be approximately 10830m 3 The cavity volume of the salt cavern is about 218337m 3 .

[0121] Embodiment 3

[0122] Fig. 9 This is a schematic diagram of the structure of a salt cavern volume detection device provided in Example 3 of the present application. The device can execute the salt cavern volume detection method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. Fig. 9 As shown, the device comprises:

[0123] The parameter association data acquisition module 310 is used to acquire at least two sets of parameter association data of the salt cavern cavity corresponding to the target salt cavern; each set of the parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after each injection of brine into the salt cavern cavity corresponding to the target salt cavern; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine;

[0124] A target change rate determination module 320 is used to determine a target change rate of the salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data; the target change rate is a change in the wellhead pressure after a unit brine injection volume is increased in the salt cavern cavity corresponding to the target salt cavern;

[0125] The salt cavern volume determination module 330 is used to determine the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus.

[0126] The technical solution of the embodiment of the present application includes: a parameter association data acquisition module 310, which is used to acquire at least two groups of parameter association data of a salt cavern cavity corresponding to a target salt cavern; each group of the parameter association data is used to indicate the change in wellhead pressure and the brine injection volume after brine is injected into the salt cavern cavity corresponding to the target salt cavern each time; the salt cavern cavity corresponding to the target salt cavern is in a state of being filled with brine before the first injection of brine and during the injection of brine; a target change rate determination module 320, which is used to determine the target change rate of the salt cavern cavity corresponding to the target salt cavern according to the at least two groups of parameter association data; the target change rate is the change in wellhead pressure after a unit brine injection volume is increased in the salt cavern cavity corresponding to the target salt cavern; a salt cavern volume determination module 330, which is used to determine the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus. This technical solution is based on the compressibility of brine. According to at least two sets of parameter correlation data and the bulk modulus of brine, the salt cavern volume of the target salt cavern can be calculated quickly and accurately. In the process of determining the salt cavern volume, compared with the acoustic wave cavity measurement method, there is no need to introduce acoustic wave equipment and a measurement team, which reduces the cost of measuring the salt cavern volume.

[0127] Optionally, the target change rate determination module 320 includes:

[0128] A position point determination unit, used to determine the position point corresponding to each group of parameter association data in a reference rectangular coordinate system; the vertical axis of the reference rectangular coordinate system is the wellhead pressure change, and the horizontal axis is the brine injection volume;

[0129] A fitting curve generating unit, used for performing curve fitting based on the position points corresponding to each group of the parameter association data and the coordinate origin of the reference rectangular coordinate system to obtain a fitting curve;

[0130] The target change rate determination unit is used to determine the slope of the fitting curve at the coordinate origin as the target change rate of the salt cavern cavity corresponding to the target salt cavern.

[0131] Optionally, if the salt cavern volume includes the actual volume of the salt cavern, the salt cavern volume determination module 330 includes:

[0132] The salt cavern real volume determination unit is used to determine the ratio of the brine bulk modulus to the target change rate as the salt cavern real volume of the target salt cavern.

[0133] Optionally, the salt cavern volume includes the cavity volume of the salt cavern;

[0134] The salt cavern volume determination module 330 includes:

[0135] a target parameter associated data determination unit, for determining parameter associated data after injecting brine into the cavity of the target salt cavern for a specified number of times as target parameter associated data;

[0136] A pressure difference and volume difference determination unit, for determining a pressure difference and a volume difference according to the target change rate and target parameter associated data; the pressure difference reflects the difference between the target wellhead pressure change in the target parameter associated data and the theoretical wellhead pressure change, and the volume difference reflects the difference between the target brine injection volume in the target parameter associated data and the theoretical brine injection volume; the theoretical wellhead pressure change is the wellhead pressure change after injecting brine into the cavity of the target salt cavern for a specified number of times without deformation of the salt cavern, and the theoretical brine injection volume is the brine injection volume injected at the specified time without deformation of the salt cavern;

[0137] A sediment volume determination unit, used to determine the sediment volume according to the volume difference, the pressure difference, the sediment porosity, the pore compression coefficient of the sediment and the compression coefficient of the brine;

[0138] A sediment pore volume determination unit, used to determine the product of the sediment volume and the sediment porosity as the sediment pore volume;

[0139] The cavity volume determination unit is used to determine the difference between the real volume of the salt cavern and the pore volume of the sediment as the cavity volume of the salt cavern.

[0140] Optionally, the pressure difference and volume difference determination unit comprises:

[0141] A theoretical brine injection volume determination subunit, used to determine the theoretical brine injection volume according to the target change rate and the target wellhead pressure change;

[0142] A theoretical wellhead pressure change determination subunit is used to determine the theoretical wellhead pressure change according to the target change rate and the target brine injection volume;

[0143] The pressure difference and volume difference determination subunit is used to determine the difference between the target brine injection volume and the theoretical brine injection volume as the volume difference, and to determine the difference between the theoretical wellhead pressure change and the target wellhead pressure change as the pressure difference.

[0144] Optionally, the theoretical brine injection volume determination subunit is specifically used for:

[0145] The ratio of the target wellhead pressure change to the target change rate is determined as the theoretical brine injection volume;

[0146] The theoretical wellhead pressure change determination subunit is specifically used for:

[0147] The product of the target brine injection volume and the target change rate is determined as the theoretical wellhead pressure change.

[0148] Optionally, the sediment volume determination unit is specifically used to:

[0149] The sediment volume is calculated by the following formula:

[0150]

[0151] Among them, V s is the sediment volume, ΔV i is the volume difference, ΔP is the pressure difference, is the sediment porosity, C s is the pore compression coefficient of the sediment, K -1 is the compression coefficient of brine.

[0152] A salt cavern volume detection device provided in an embodiment of the present application can execute a salt cavern volume detection method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects of the execution method.

[0153] Embodiment 4

[0154] Fig.10 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0155] like Fig.10 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0156] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0157] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for detecting the volume of a salt cavern.

[0158] In some embodiments, the method for detecting the volume of a salt cavern may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for detecting the volume of a salt cavern described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the method for detecting the volume of a salt cavern in any other appropriate manner (e.g., by means of firmware).

[0159] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0160] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0161] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0162] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0163] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0164] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0165] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0166] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the volume of a salt cavern, characterized in that: include: Acquire at least two sets of parameter correlation data of the salt cavern cavity corresponding to the target salt cavern; Each group of parameter association data is used to indicate the change in wellhead pressure and the volume of brine injected each time brine is injected into the corresponding salt cavern cavity of the target salt cavern; The salt cavern cavity corresponding to the target salt cavern is filled with brine before and during the injection of brine for the first time; Determining a target change rate of a salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data; The target change rate is the change in wellhead pressure after increasing the unit brine injection volume in the salt cavern cavity corresponding to the target salt cavern; The salt cavern volume of the target salt cavern is determined according to the target change rate and the brine bulk modulus.

2. The method according to claim 1, characterized in that Determining a target change rate of a salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data includes: In a reference rectangular coordinate system, determining the position point corresponding to each group of parameter association data; the vertical axis of the reference rectangular coordinate system is the wellhead pressure change, and the horizontal axis is the brine injection volume; Performing curve fitting based on the position points corresponding to each group of the parameter association data and the coordinate origin of the reference rectangular coordinate system to obtain a fitting curve; The slope of the fitting curve at the origin of the coordinate system is determined as the target change rate of the salt cavern cavity corresponding to the target salt cavern.

3. The method according to claim 1, characterized in that If the salt cavern volume includes the actual volume of the salt cavern, the salt cavern volume of the target salt cavern is determined according to the target change rate and the brine bulk modulus, including: The ratio of the brine bulk modulus to the target change rate is determined as the true volume of the target salt cavern.

4. The method according to claim 3, characterized in that The salt cavern volume includes the cavity volume of the salt cavern; The determining the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus includes: Determining parameter association data after injecting brine into the cavity of the target salt cavern for a specified number of times as target parameter association data; The pressure difference and volume difference are determined according to the target change rate and the target parameter associated data; the pressure difference reflects the difference between the target wellhead pressure change in the target parameter associated data and the theoretical wellhead pressure change, and the volume difference reflects the difference between the target brine injection volume in the target parameter associated data and the theoretical brine injection volume; the theoretical wellhead pressure change is the wellhead pressure change after brine is injected into the cavity of the target salt cavern for a specified number of times without deformation of the salt cavern, and the theoretical brine injection volume is the brine injection volume of the brine injected for the specified number of times without deformation of the salt cavern; Determining the sediment volume according to the volume difference, the pressure difference, the sediment porosity, the pore compressibility coefficient of the sediment and the compressibility coefficient of the brine; The product of the sediment volume and the sediment porosity is determined as the sediment pore volume; The difference between the true volume of the salt cavern and the pore volume of the sediment is determined as the cavity volume of the salt cavern.

5. The method according to claim 4, characterized in that Determining the pressure difference and the volume difference according to the target change rate and the target parameter associated data includes: Determine the theoretical brine injection volume according to the target change rate and the target wellhead pressure change; Determine the theoretical wellhead pressure change according to the target change rate and the target brine injection volume; The difference between the target brine injection volume and the theoretical brine injection volume is determined as the volume difference, and the difference between the theoretical wellhead pressure change and the target wellhead pressure change is determined as the pressure difference.

6. The method according to claim 5, characterized in that Determining the theoretical brine injection volume according to the target change rate and the target wellhead pressure change includes: The ratio of the target wellhead pressure change to the target change rate is determined as the theoretical brine injection volume; Determining the theoretical wellhead pressure change according to the target change rate and the target brine injection volume includes: The product of the target brine injection volume and the target change rate is determined as the theoretical wellhead pressure change.

7. The method according to claim 4, characterized in that The method of determining the sediment volume according to the volume difference, the pressure difference, the sediment porosity, the pore compression coefficient of the sediment and the compression coefficient of the brine comprises: The sediment volume is calculated by the following formula: Among them, V s is the sediment volume, ΔV i is the volume difference, ΔP is the pressure difference, is the sediment porosity, C s is the pore compression coefficient of the sediment, K -1 is the compression coefficient of brine.

8. A salt cavern volume detection device, characterized in that: include: A parameter association data acquisition module, used to acquire at least two sets of parameter association data corresponding to the salt cavern cavity of the target salt cavern; Each group of parameter association data is used to indicate the change in wellhead pressure and the volume of brine injected each time brine is injected into the corresponding salt cavern cavity of the target salt cavern; The salt cavern cavity corresponding to the target salt cavern is filled with brine before and during the injection of brine for the first time; a target change rate determination module, configured to determine a target change rate of a salt cavern cavity corresponding to the target salt cavern according to the at least two sets of parameter association data; The target change rate is the change in wellhead pressure after increasing the unit brine injection volume in the salt cavern cavity corresponding to the target salt cavern; The salt cavern volume determination module is used to determine the salt cavern volume of the target salt cavern according to the target change rate and the brine bulk modulus.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for detecting the volume of a salt cavern according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the salt cavern volume detection method according to any one of claims 1 to 7 when executed.

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