Gas storage process parameter acquisition method, device, equipment and medium

Abstract

The application provides a gas storage process parameter acquisition method, device, equipment and medium. The method comprises determining the top depth of a continuous salt layer section according to formation parameters; and determining the cavity top depth and the running depth of a casing shoe based on the top depth of the continuous salt layer section; wherein the cavity top depth is below the top depth of the continuous salt layer section, and the running depth of the casing shoe is above the top depth of the continuous salt layer section. In the scheme of the application, no excessive salt layer needs to be reserved at the top of the cavity, and the cavity forming section can be basically entirely used for cavity forming, thereby improving the utilization rate of the cavity forming section.

Description

Technical Field

[0001] This application relates to a cavity-building technology for salt cavern gas storage, and particularly to a method, apparatus, equipment, and medium for obtaining process parameters of the gas storage. Background Technology

[0002] Salt cavern underground gas storage facilities are widely recognized as ideal locations for oil and gas storage due to the excellent creep, low permeability, and self-healing properties of salt layers, as well as their superior sealing and high safety and stability, while also considering technical and economic factors. In practical applications, before cavity construction, process parameters need to be determined, including but not limited to the designed cavity top depth and the insertion depth of the casing shoe. Once the process parameters are determined, the cavity construction process is carried out based on these parameters to achieve cavity construction.

[0003] Regarding the acquisition of process parameters, to ensure the sealing of the casing shoe as required for the gas storage cavity construction, relevant technologies set the casing shoe insertion depth to be at least a predetermined distance below the top surface of the salt layer, such as 15 meters. Simultaneously, to prevent damage to the casing shoe during cavity construction, the designed cavity top needs to maintain a distance of, for example, 15 to 20 meters from the casing shoe. Therefore, the actual thickness of the cavity-constructing layer is reduced by 30 to 35 meters.

[0004] The current method for obtaining process parameters results in a low utilization rate of the cavity-forming layer due to the reduced thickness of the available cavity-forming layer. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, and medium for obtaining process parameters of a gas storage facility to address the problem of low utilization rate of the cavity-forming section.

[0006] On the one hand, this application provides a method for obtaining process parameters of a gas storage facility, including:

[0007] Determine the top depth of the continuous salt layer section based on the stratigraphic parameters;

[0008] Based on the top depth of the continuous salt layer segment, the cavity top depth and the insertion depth of the sleeve shoe are determined; wherein, the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the sleeve shoe is above the top depth of the continuous salt layer segment.

[0009] In one embodiment, determining the insertion depth of the casing shoe based on the top depth of the continuous salt layer segment includes:

[0010] The insertion depth of the casing shoe is determined based on the top depth of the continuous salt layer segment, wherein the insertion depth of the casing shoe is located within the adjacent salt layer above the top depth of the continuous salt layer segment.

[0011] In one embodiment, determining the insertion depth of the casing shoe based on the top depth of the continuous salt layer segment includes:

[0012] Based on the formation parameters, determine the sealing degree of the adjacent mud layer above the top depth of the continuous salt layer section;

[0013] If the sealing degree of the adjacent mud layer meets the predetermined sealing requirements, then the insertion depth of the sleeve shoe is determined to be within the adjacent mud layer.

[0014] In one embodiment, the distance between the cavity top depth and the insertion depth of the sleeve shoe is 30 meters.

[0015] In one embodiment, the distance between the cavity top depth and the top depth of the continuous salt layer segment is 3 to 5 meters.

[0016] In one embodiment, the continuous salt layer segment includes multiple salt layers with a mud layer between adjacent salt layers, the thickness of which does not exceed a predetermined thickness threshold.

[0017] On the other hand, this application provides a device for obtaining process parameters of a gas storage facility, comprising:

[0018] The determination module is used to determine the depth of continuous salt layer segments based on formation parameters;

[0019] The processing module is used to calculate the cavity top depth and the depth to which the cannula shoe should be inserted based on the depth of the continuous salt layer segment; wherein the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the cannula shoe is above the top depth of the continuous salt layer segment.

[0020] In one embodiment, the processing module is specifically used to determine the insertion depth of the casing shoe by the top depth of the continuous salt layer segment, wherein the insertion depth of the casing shoe is located within an adjacent salt layer above the top depth of the continuous salt layer segment.

[0021] In one embodiment, the processing module is specifically used to determine the sealing degree of the adjacent mud layer above the top depth of the continuous salt layer section based on the formation parameters.

[0022] The processing module is further configured to determine that the insertion depth of the sleeve shoe is within the adjacent mud layer if the sealing degree of the adjacent mud layer meets the predetermined sealing requirements.

[0023] In one embodiment, the distance between the cavity top depth and the insertion depth of the sleeve shoe is 30 meters.

[0024] In one embodiment, the distance between the cavity top depth and the top depth of the continuous salt layer segment is 3 to 5 meters.

[0025] In one embodiment, the continuous salt layer segment includes multiple salt layers with a mud layer between adjacent salt layers, the thickness of which does not exceed a predetermined thickness threshold.

[0026] In another aspect, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0027] The memory stores computer-executed instructions;

[0028] The processor executes computer execution instructions stored in the memory to implement the method described above.

[0029] In another aspect, this application provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, are used to implement the method described above.

[0030] The method, apparatus, equipment, and medium for obtaining process parameters of a gas storage facility provided in this application include determining the top depth of a continuous salt layer section based on formation parameters, and determining the position of the casing shoe and the cavity top depth based on the top depth of the continuous salt layer section. The cavity top depth is located below the top depth of the continuous salt layer section, and the insertion depth of the casing shoe is located above the top depth of the continuous salt layer section. With this solution, the top of the cavity does not need to reserve too much salt layer, and the cavity-building section can be almost entirely used for cavity building, thereby improving the utilization rate of the cavity-building section. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 The conventional cavity-building technology for salt cavern gas storage is used as an example;

[0033] Figure 2 A flowchart illustrating the method for obtaining process parameters of a gas storage facility as provided in Embodiment 1 of this application;

[0034] Figure 3 An example of a cavity-building technology for salt cavern gas storage;

[0035] Figure 4 This is a flowchart illustrating the method for obtaining process parameters of a gas storage facility as provided in Embodiment 2 of this application.

[0036] Figure 5 This is a flowchart illustrating the method for obtaining process parameters of a gas storage facility as provided in Embodiment 3 of this application.

[0037] Figure 6 An example of a cavity-building technology for salt cavern gas storage;

[0038] Figure 7 This is a comparative diagram of the cavity design provided in Embodiment 4 of this application;

[0039] Figure 8 This is a schematic diagram of a gas storage process parameter acquisition device provided in Embodiment 5.

[0040] Figure 9 This is a block diagram of an apparatus according to an exemplary embodiment;

[0041] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0045] Figure 1 This diagram illustrates a conventional cavity-building technique for a salt cavern gas storage facility. In the diagram, ① represents the production casing, ② the cement sheath, ③ the casing shoe, ④ the open hole section, and ⑤ the cavity. The casing shoe's insertion depth in this scheme refers to the insertion depth of the production casing's casing shoe. In practical applications, an annular space is formed between the production casing and the downhole formation sidewall. This annular space can be filled with cement to form a cement sheath. During cavity building, the assembly responsible for water injection dissolution and brine drainage is called the cavity-building tubing assembly (not shown in the diagram). It consists of an inner cavity-building tubing and an outer cavity-building tubing. The cavity-building tubing can be adjusted to a suitable formation depth based on cavity building needs. After cavity building is completed, the cavity-building tubing is removed, and then the injection-production tubing is installed to handle the subsequent gas injection and production processes of the gas storage facility.

[0046] In conventional cavity-building techniques, the casing shoe is typically lowered a certain distance (e.g., 15 meters) below the top surface of the salt layer. Furthermore, to prevent damage to the casing shoe during cavity building, a distance (e.g., 15-20 meters) is maintained between the top of the cavity and the casing shoe. Current process parameter acquisition methods suffer from low utilization rates of the available cavity-building layer due to the reduced thickness of the available layer. To address this, this application provides a method, apparatus, equipment, and medium for acquiring process parameters of a gas storage facility.

[0047] The technical solutions of this application will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. In the description of this application, unless otherwise expressly specified and limited, the terms should be broadly understood within the art. The embodiments of this application will now be described with reference to the accompanying drawings.

[0048] Example 1

[0049] Figure 2 This is a flowchart illustrating the method for obtaining process parameters of a gas storage facility provided in Embodiment 1 of this application, as shown below. Figure 2 As shown, the method includes:

[0050] Step 101: Determine the top depth of the continuous salt layer section based on the formation parameters;

[0051] Step 102: Based on the top depth of the continuous salt layer segment, determine the cavity top depth and the insertion depth of the sleeve shoe; wherein, the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the sleeve shoe is above the top depth of the continuous salt layer segment.

[0052] Among them, formation parameters are used to reflect the formation and its distribution in the well. Optionally, the formation parameters include, but are not limited to, formation type and the distribution depth of each formation. Combined with... Figure 1 As shown, based on formation parameters, it can be determined that there are at least five formations distributed in the well, from top to bottom: the first mudstone layer (the shaded area below the surface), the first salt layer (the white area below the surface), the second salt layer, and the third mudstone layer.

[0053] In practical applications, salt rock possesses favorable geological conditions such as wide distribution, diverse types, large scale, deep burial depth, good water-tight caprock, few fault structures, simple hydrological conditions, and stable crust with no destructive earthquakes. It also exhibits excellent physical and mechanical properties, including low permeability, low porosity, and dense structure, making it suitable for gas storage cavity construction. Currently, based on the stratigraphic characteristics of different regions, most salt mines consist of layered salt rock, with salt layers interbedded with mudstone, anhydrite, and other materials. Some interlayers divide the salt rock into multiple thin segments.

[0054] In one example, the continuous salt layer segment comprises a single salt rock layer with a thickness exceeding a predetermined thickness. For example... Figure 1 The second salt rock layer shown is a single salt rock layer with a certain thickness (e.g., at least 100 meters). Cavities can be formed within this single salt rock layer.

[0055] In another example, to accommodate cavity construction in interbedded formations, the continuous salt layer segment comprises multiple salt layers with interlayered mud layers between adjacent salt layers, the thickness of which does not exceed a predetermined thickness threshold. In practical applications, considering the geological characteristics of interbedded formations, salt layers are directly defined as consecutive salt layers with interlayered mud layers not exceeding a certain thickness as cavity-constructing segments. This allows for adaptation to different geological features, improving the application and reliability of cavity construction in gas storage facilities.

[0056] For ease of understanding, combined with Figure 3 As shown, Figure 3 This is an example of a cavity-building technology for a salt cavern gas storage facility. Figure 3 The formation is characterized by interbedded layers, with at least seven strata distributed downhole, from top to bottom: the first mudstone layer (the shaded area below the surface), the first salt rock layer (the white area below the surface), the second mudstone layer, the second salt rock layer, the third mudstone layer, the third salt rock layer, and the fourth mudstone layer. As shown in the figure, based on the characteristics of this downhole formation, no single thick salt rock layer with a thickness exceeding 100 meters was found. Therefore, based on the above example, assuming the thickness of the third mudstone layer is relatively small, for example, typically set to no more than 10 meters, the second and third salt rock layers can be treated as a continuous salt layer segment, and a cavity can be designed and constructed within this continuous salt layer segment.

[0057] In this embodiment, after determining the continuous salt layer segment used for cavity creation, the cavity top depth and the insertion depth of the cannula shoe are determined based on the top depth of the continuous salt layer segment. In one example, the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the cannula shoe is above the top depth of the continuous salt layer segment.

[0058] Still combined Figure 3As shown in the figure, the cavity top depth obtained based on this embodiment only needs to be below the top depth of the continuous salt layer section (interface a in the figure). Correspondingly, the insertion depth of the casing shoe is above the top depth of the continuous salt layer section. In a practical scenario example, this embodiment utilizes the strata above the continuous salt layer section to ensure the sealing requirements during cavity construction and to isolate the production casing, preventing damage to the casing shoe during cavity construction. Specifically, considering the actual geological conditions, the mudstone interlayer itself may meet the sealing and stability requirements, and the salt rock layer has a relatively higher sealing performance than mudstone. Therefore, in this embodiment, the alternating mudstone and salt layer sections above the continuous salt layer section are used as the sealing section for the casing shoe. Based on the scheme of this embodiment, when designing the cavity, there is no need to reserve 30-35 meters of salt layer at the top of the cavity. That is to say, the entire thickness of the continuous salt layer section can basically be used for cavity construction, thereby effectively improving the utilization rate of the cavity construction section and increasing the construction space of the salt cavern underground gas storage facility.

[0059] In one example, the distance between the cavity top depth and the top depth of the continuous salt layer segment can be 3 to 5 meters. (Combined with...) Figure 3 Examples, such as Figure 3 As shown, assuming a continuous salt layer section is selected from 1458 to 1612 meters below the surface, the top depth of the cavity in the diagram is below 1458 meters. Considering the interlayer situation, the cavity depth is designed to be 5 meters below the top of the salt layer, i.e., 1463 meters. Accordingly, based on this example, the depth of the casing shoe can be adjusted to a position above 1458 meters below the surface.

[0060] The method for obtaining process parameters of a gas storage facility provided in this embodiment includes determining the top depth of a continuous salt layer section based on formation parameters, and determining the position of the casing shoe and the cavity top depth based on the top depth of the continuous salt layer section. The cavity top depth is determined to be below the top depth of the continuous salt layer section, and the casing shoe's insertion depth is determined to be above the top depth of the continuous salt layer section. In this embodiment, there is no need to reserve a 30-35m salt layer at the top of the cavity, and the cavity-building section can be almost entirely used for cavity construction, improving the utilization rate of the cavity-building section.

[0061] Example 2

[0062] Figure 4 This is a flowchart illustrating the method for obtaining process parameters of a gas storage facility as provided in Embodiment 2 of this application. Figure 4 As shown, based on Embodiment 1, step 102, determining the insertion depth of the casing shoe based on the top depth of the continuous salt layer section, may specifically include:

[0063] Step 401: Based on the top depth of the continuous salt layer segment, determine the insertion depth of the casing shoe, wherein the insertion depth of the casing shoe is located within the adjacent salt layer above the top depth of the continuous salt layer segment.

[0064] In this example, for a well section requiring gas storage construction, the top depth of the continuous salt layer is first determined based on formation parameters. This continuous salt layer is the cavity-building section used to design and form the gas storage cavity. After determining the top depth of the continuous salt layer, it can be determined that the cavity top depth is below the top depth of the continuous rock layer, and the casing shoe insertion depth is determined to be within the adjacent salt layer above the top depth of the continuous salt layer.

[0065] In practical applications, the thickness of the continuous salt layer segment can be at least 100 meters. In this embodiment, the top depth of the continuous salt layer segment is a reference depth for determining the cavity top depth and the sleeve shoe position. The sleeve shoe is located in the salt layer above the continuous salt layer segment, and the cavity top depth is below the top depth of the continuous salt layer segment. In one example, the distance between the cavity top depth and the top depth of the continuous salt layer segment is 3 to 5 meters.

[0066] In this embodiment, the excellent sealing properties of the salt rock layer are utilized to lower the casing shoe into the salt rock layer, ensuring the sealing requirements of the casing shoe. Here, the salt rock layer into which the casing shoe is lowered refers to the adjacent salt rock layer above the continuous salt layer section used for cavity creation. Combined with... Figure 3 In the example shown, based on this embodiment, the insertion depth of the cannula shoe is determined to be within the first salt rock layer. The first salt rock layer, with its good sealing properties, ensures the sealing requirements of the cannula shoe. Furthermore, since the top depth of the cavity is below the top depth of the continuous salt layer section—meaning there are a first salt rock layer and a second mudstone layer separating the cavity top depth from the cannula shoe—damage to the cannula shoe during cavity construction is further avoided, improving cavity construction safety.

[0067] As an example, this embodiment can be applied to strata where the mudstone layer thickness between a continuous salt layer and an adjacent salt layer above it is within a certain range. In one example, the distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. In actual cavity construction, considering the differences in different strata conditions, this distance will have an adjustment range, for example, the distance may be selected as 28 to 35 meters, to further ensure that the casing shoe is not damaged.

[0068] The method for obtaining process parameters of the gas storage facility provided in this embodiment places the insertion depth of the casing shoe within the adjacent salt layer above the top depth of the continuous salt layer section. The distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. This embodiment can ensure the sealing performance of the casing shoe and also avoid damage to the casing shoe during cavity construction, thereby improving the safety of cavity construction.

[0069] Example 3

[0070] Figure 5 This is a flowchart illustrating the method for obtaining process parameters of a gas storage facility provided in Embodiment 3 of this application, as shown below. Figure 5As shown, based on Embodiment 1, step 102, determining the insertion depth of the casing shoe based on the top depth of the continuous salt layer section, may specifically include:

[0071] Step 501: Determine the sealing degree of the adjacent mud layer above the top depth of the continuous salt layer section based on the formation parameters.

[0072] Step 502: If the sealing degree of the adjacent mud layer reaches the predetermined sealing requirement, then it is determined that the insertion depth of the sleeve shoe is located within the adjacent mud layer.

[0073] In this example, for a well section requiring gas storage construction, the top depth of the continuous salt layer is first determined based on formation parameters. This continuous salt layer is the cavity-building section, designed to form the gas storage cavity. After determining the top depth of the continuous salt layer, the sealing degree of the adjacent mud layer (also called mudstone layer) above the top depth of the continuous salt layer is further determined based on the formation parameters. If the sealing degree of the adjacent mud layer meets the predetermined sealing requirements, the cavity top depth can be determined to be below the top depth of the continuous salt layer, and the casing shoe insertion depth can be determined to be within this adjacent mud layer.

[0074] In practical applications, the thickness of the continuous salt layer segment can be at least 100 meters. Similarly, in this embodiment, the top depth of the continuous salt layer segment serves as a reference depth for determining the cavity top depth and the casing shoe position. The casing shoe is located in the mudstone layer above the continuous salt layer segment, and the cavity top depth is below the top depth of the continuous salt layer segment. In one example, the distance between the cavity top depth and the top depth of the continuous salt layer segment is 3–5 meters.

[0075] In this embodiment, the good sealing properties of the mudstone layer above the continuous salt layer are utilized to lower the casing shoe into the mudstone layer above the continuous salt layer, ensuring the casing shoe's sealing requirements. Specifically, the mudstone layer into which the casing shoe is lowered is the salt rock layer in contact with the continuous salt layer used for cavity creation. Combined with... Figure 6 The example shown, Figure 6 As an example, a cavity-building technology for salt cavern gas storage, such as Figure 6 As shown, its strata are distributed in Figure 3 The example shown is similar, consisting of, from top to bottom, a first mudstone layer (the shaded area below the surface), a first salt rock layer (the white area below the surface), a second mudstone layer, a second salt rock layer, a third mudstone layer, a third salt rock layer, and a fourth mudstone layer. The key feature is that, in this embodiment, the insertion depth of the casing shoe is determined to be within the second mudstone layer. The mudstone layer, with its good sealing properties, ensures the sealing requirements of the casing shoe. Furthermore, since the top depth of the cavity is below the top depth of the continuous salt layer section, meaning there is a well-sealed mudstone layer between the top depth of the cavity and the casing shoe, damage to the casing shoe during cavity construction is further avoided, improving cavity construction safety.

[0076] As an example, this embodiment can be applied to formations with a large mudstone layer thickness between a continuous salt layer and an adjacent salt layer above it, such as exceeding 35 meters. In one example, the distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. In actual cavity construction, considering the differences in different formation conditions, the distance will have an adjustment range, for example, the distance may be selected as 28 to 35 meters, to further ensure that the casing shoe is not damaged.

[0077] The method for obtaining process parameters of the gas storage facility provided in this embodiment places the insertion depth of the casing shoe in the mudstone layer above the top depth of the continuous salt layer section. The distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. This embodiment can ensure the sealing performance of the casing shoe and also avoid damage to the casing shoe during cavity construction, thereby improving the safety of cavity construction.

[0078] Example 4

[0079] Figure 7 The figure shows a comparative diagram of the cavity design provided in Embodiment 4 of this application. Embodiment 4 of this application provides a comparative example of technical solutions in conjunction with the stratigraphic distribution of a certain region, as shown in the figure:

[0080] In a certain region, the upper part of the cavity-building section of a salt mine contains a relatively thick saline stratum, with some sections being quite thick. Based on the aforementioned embodiment, it is possible to design the production casing to be lowered into the saline stratum above the cavity-building section, utilizing the entire lower thick salt rock layer for cavity building, thereby improving the utilization rate of the salt layer. Specifically, the reservoir construction section is selected from a relatively continuous salt layer at a depth of 1453–1612 meters for simulated cavity building, and the specific implementation is as follows: Figure 7 As shown:

[0081] ① Well A (leftmost in the figure) uses conventional cavity-making technology. The casing shoe is lowered 15 meters below the top depth of the continuous salt rock section, that is, the casing shoe is lowered to a depth of 1468 meters. Based on the interlayer situation, 1483-1612 meters is selected as the cavity-making section, that is, the cavity top depth is 1483 meters.

[0082] ② Well B uses the same formation parameters as Well A. Based on the salt layer cavity-making technology described in the previous embodiment, and considering the interlayer situation, the cavity top depth is designed to be 5 meters below the top of the salt layer. The cavity-making section is selected as 1458–1612 meters, meaning the cavity top depth is 1458 meters. The casing shoe is lowered into a thick layer of salt rock approximately 30 meters above the top of the salt layer, at a depth of 1425 meters.

[0083] ③ Wells C1-C2 use the same formation parameters as Wells A and B, and are based on the salt layer cavity utilization technology described in the previous embodiment. Combined with the dual-well single-cavity cavity technology, the distance between the two wells is 20 meters. The casing shoe insertion depth and cavity section setting are the same as those of Well B. Throughout the entire melting process, the depth of the inner and outer cavity tubes of the two wells C1-C2 remains consistent and is simultaneously raised.

[0084] Simulations showed that the effective volumes of the cavities in wells A and B were 18 × 10⁻⁶ and 18 × 10⁻⁶, respectively. 4 cubic meters, 24.1 × 10 4 cubic meters, the calculated single-cavity storage capacity is 4361 × 10 4 cubic meters, 5834×10 4 cubic meters, with single-chamber working gas of 2596×10 4 cubic meters, 3473×10 4 Cubic meters. It can be seen that, under the same formation parameters, the scheme provided in the aforementioned embodiment increases the effective cavity volume, single-cavity storage capacity, and single-cavity working gas by 34% compared to the conventional cavity-making technology. The single-cavity volume of the C1-C2 dual wells is 31.2 × 10³ cubic meters. 4 cubic meters, single-chamber storage capacity 7559.5×10 4 cubic meters, single-chamber working gas volume 4500×10 4 Cubic meters. The depth of the cavity top makes full use of the salt mine resources and increases the space for reservoir construction.

[0085] Example 5

[0086] Figure 8 This is a schematic diagram of a gas storage process parameter acquisition device provided in Embodiment 5. The device includes:

[0087] Module 81 is used to determine the depth of the continuous salt layer segment based on formation parameters;

[0088] The processing module 82 is used to calculate the cavity top depth and the depth to which the cannula shoe should be inserted based on the depth of the continuous salt layer segment; wherein the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the cannula shoe is above the top depth of the continuous salt layer segment.

[0089] In practical applications, salt rock possesses favorable geological conditions such as wide distribution, diverse types, large scale, deep burial depth, good water-tight caprock, few fault structures, simple hydrological conditions, and stable crust with no destructive earthquakes. It also exhibits excellent physical and mechanical properties, including low permeability, low porosity, and dense structure, making it suitable for gas storage cavity construction. Currently, based on the stratigraphic characteristics of different regions, most salt mines consist of layered salt rock, with salt layers interbedded with mudstone, anhydrite, and other materials. Some interlayers divide the salt rock into multiple thin segments.

[0090] In one example, the continuous salt layer segment comprises a single salt rock layer with a thickness exceeding a predetermined thickness. For example, a single salt rock layer with a required thickness (e.g., at least 100 meters). Cavities can be formed within this single salt rock layer.

[0091] In another example, to accommodate cavity construction in interbedded formations, the continuous salt layer segment comprises multiple salt layers with interlayered mud layers between adjacent salt layers, the thickness of which does not exceed a predetermined thickness threshold. In practical applications, considering the geological characteristics of interbedded formations, multiple consecutive salt layers with interlayered mud layers of no more than a certain thickness are identified as cavity-constructing salt layer segments. This allows for adaptation to different geological features, improving the application and reliability of cavity construction in gas storage facilities.

[0092] Optionally, in conjunction with the scenario example, after determining the continuous salt layer segment used for cavity creation, in this embodiment, the cavity top depth and the insertion depth of the cannula shoe are determined based on the top depth of the continuous salt layer segment. In one example, the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the cannula shoe is above the top depth of the continuous salt layer segment.

[0093] Optionally, based on a real-world scenario example, this embodiment utilizes the strata above the continuous salt layer section to ensure the sealing requirements during cavity construction and to isolate the production casing, preventing damage to the casing shoe during cavity construction. Specifically, considering the actual geological conditions, the mudstone interlayer itself may meet the sealing and stability requirements, and the salt rock layer has relatively higher sealing performance than mudstone. Therefore, in this embodiment, the alternating mudstone and salt layers above the continuous salt layer section are used as the sealing section for the casing shoe. Based on the scheme of this embodiment, when designing the cavity, there is no need to reserve 30-35 meters of salt layer at the top of the cavity. That is to say, the entire thickness of the continuous salt layer section can be used for cavity construction, thereby effectively improving the utilization rate of the cavity construction layer and increasing the construction space of the salt cavern underground gas storage facility.

[0094] Optionally, the distance between the cavity top depth and the top depth of the continuous salt layer section can be 3 to 5 meters.

[0095] In another instance, the processing module 82 is specifically used to determine the insertion depth of the casing shoe by the top depth of the continuous salt layer segment, the insertion depth of the casing shoe being located within an adjacent salt layer above the top depth of the continuous salt layer segment.

[0096] In this example, for a well section requiring gas storage construction, the top depth of the continuous salt layer is first determined based on formation parameters. This continuous salt layer is the cavity-building section used to design and form the gas storage cavity. After determining the top depth of the continuous salt layer, it can be determined that the cavity top depth is below the top depth of the continuous rock layer, and the casing shoe insertion depth is determined to be within the adjacent salt layer above the top depth of the continuous salt layer.

[0097] In this embodiment, the excellent sealing properties of the salt rock layer are utilized to lower the cannula shoe into the salt rock layer, ensuring the cannula shoe's sealing requirements. Here, the salt rock layer into which the cannula shoe is lowered refers to the adjacent salt rock layer above the continuous salt rock section used for cavity creation. In this embodiment, the insertion depth of the cannula shoe is determined to be within the first salt rock layer. The first salt rock layer, with its excellent sealing properties, ensures the sealing requirements of the cannula shoe. Furthermore, since the top depth of the cavity is below the top depth of the continuous salt rock section—meaning there are a first salt rock layer and a second mudstone layer separating the cavity top depth from the cannula shoe—damage to the cannula shoe during cavity creation is further avoided, improving cavity creation safety.

[0098] As an example, this embodiment can be applied to strata where the mudstone layer thickness between a continuous salt layer and an adjacent salt layer above it is within a certain range. In one example, the distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. In actual cavity construction, considering the differences in different strata conditions, the distance will have an adjustment range, for example, the distance may be selected as 28 to 35 meters, to further ensure that the casing shoe is not damaged.

[0099] The gas storage process parameter acquisition device provided in this example places the insertion depth of the casing shoe within the adjacent salt layer above the top depth of the continuous salt layer section. The distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. This embodiment can ensure the sealing performance of the casing shoe and also avoid damage to the casing shoe during cavity construction, thereby improving the safety of cavity construction.

[0100] In another example, processing module 82 is specifically used to determine the sealing degree of the adjacent mud layer above the top depth of the continuous salt layer segment based on the formation parameters.

[0101] The processing module 82 is further configured to determine that the insertion depth of the sleeve shoe is located within the adjacent mud layer if the sealing degree of the adjacent mud layer reaches the predetermined sealing requirement.

[0102] In this example, for a well section requiring gas storage construction, the top depth of the continuous salt layer is first determined based on formation parameters. This continuous salt layer is the cavity-building section, designed to form the gas storage cavity. After determining the top depth of the continuous salt layer, the sealing degree of the adjacent mud layer (also called mudstone layer) above the top depth of the continuous salt layer is further determined based on the formation parameters. If the sealing degree of the adjacent mud layer meets the predetermined sealing requirements, the cavity top depth can be determined to be below the top depth of the continuous mudstone layer, and the casing shoe insertion depth can be determined to be within the adjacent mud layer.

[0103] In this embodiment, the good sealing properties of the mudstone layer above the continuous salt layer are utilized to lower the casing shoe into the mudstone layer above the continuous salt layer, ensuring the casing shoe's sealing requirements. Specifically, the mudstone layer into which the casing shoe is lowered is the salt rock layer in contact with the continuous salt layer used for cavity construction. In this embodiment, the insertion depth of the casing shoe is determined to be within the second mudstone layer. The good sealing properties of the mudstone layer ensure the casing shoe's sealing requirements. Furthermore, since the top depth of the cavity is below the top depth of the continuous salt layer, meaning there is a well-sealed mudstone layer between the cavity top depth and the casing shoe, damage to the casing shoe during cavity construction is further avoided, improving cavity construction safety.

[0104] As an example, this embodiment can be applied to formations with a large mudstone layer thickness between a continuous salt layer and an adjacent salt layer above it, such as exceeding 35 meters. In one example, the distance between the cavity top depth and the insertion depth of the casing shoe is 30 meters. In actual cavity construction, considering the differences in different formation conditions, the distance will have an adjustment range, for example, the distance may be selected as 28 to 35 meters, to further ensure that the casing shoe is not damaged.

[0105] The gas storage process parameter acquisition device provided in this example places the casing shoe at a depth above the top depth of the continuous salt layer in the mudstone layer. The distance between the cavity top depth and the casing shoe depth is 30 meters. This embodiment can ensure the sealing of the casing shoe and also avoid damage to the casing shoe during cavity construction, thereby improving the safety of cavity construction.

[0106] In the gas storage process parameter acquisition device provided in this embodiment, the determining module determines the top depth of the continuous salt layer section based on the formation parameters, and the processing module determines the position of the casing shoe and the cavity top depth based on the top depth of the continuous salt layer section. The cavity top depth is located below the top depth of the continuous salt layer section, and the insertion depth of the casing shoe is located above the top depth of the continuous salt layer section. In this embodiment, it is not necessary to reserve too much salt layer at the top of the cavity, and the cavity-building section can be used almost entirely for cavity building, thereby improving the utilization rate of the cavity-building section.

[0107] Example 6

[0108] Figure 9 This is a block diagram of an apparatus according to an exemplary embodiment. The apparatus may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0109] The device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output (I / O) interface 812, a sensor component 814, and a communication component 816.

[0110] Processing component 802 typically controls the overall operation of device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0111] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0112] Power supply component 806 provides power to various components of device 800. Power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 800.

[0113] Multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0114] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0115] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0116] Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of device 800. For example, sensor assembly 814 may detect the on / off state of device 800, the relative positioning of components such as the display and keypad of device 800, changes in the position of device 800 or a component of device 800, the presence or absence of user contact with device 800, the orientation or acceleration / deceleration of device 800, and temperature changes of device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0117] Communication component 816 is configured to facilitate wired or wireless communication between device 800 and other devices. Device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0118] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0119] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of the device 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0120] Example 7

[0121] Figure 10 A schematic diagram of the structure of an electronic device provided in this application embodiment is shown in the figure. The electronic device includes:

[0122] The electronic device includes a processor 291 and a memory 292; it may also include a communication interface 293 and a bus 294. The processor 291, memory 292, and communication interface 293 can communicate with each other via the bus 294. The communication interface 293 can be used for information transmission. The processor 291 can invoke logical instructions stored in the memory 294 to execute the methods of the above embodiments.

[0123] Furthermore, the logic instructions in the aforementioned memory 292 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0124] The memory 292, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this application. The processor 291 executes functional applications and data processing by running the software programs, instructions, and modules stored in the memory 292, thereby implementing the methods in the above-described method embodiments.

[0125] The memory 292 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 292 may include high-speed random access memory and may also include non-volatile memory.

[0126] This application provides a non-transitory computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the methods described in the foregoing embodiments.

[0127] This application provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the foregoing embodiments.

[0128] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0129] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for obtaining process parameters of a gas storage facility, characterized in that, include: Determine the top depth of the continuous salt layer section based on the stratigraphic parameters; Based on the top depth of the continuous salt layer segment, the cavity top depth and the insertion depth of the sleeve shoe are determined; wherein, the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the sleeve shoe is above the top depth of the continuous salt layer segment; the continuous salt layer segment includes multiple salt layers, and there are intervening mud layers between adjacent salt layers, the thickness of the intervening mud layers does not exceed a predetermined thickness threshold. The distance between the cavity top depth and the top depth of the continuous salt layer section is 3 to 5 meters.

2. The method according to claim 1, characterized in that, Determining the insertion depth of the casing shoe based on the top depth of the continuous salt layer segment includes: The insertion depth of the casing shoe is determined based on the top depth of the continuous salt layer segment, wherein the insertion depth of the casing shoe is located within the adjacent salt layer above the top depth of the continuous salt layer segment.

3. The method according to claim 1, characterized in that, Determining the insertion depth of the casing shoe based on the top depth of the continuous salt layer segment includes: Based on the formation parameters, determine the sealing degree of the adjacent mud layer above the top depth of the continuous salt layer section; If the sealing degree of the adjacent mud layer meets the predetermined sealing requirements, then the insertion depth of the sleeve shoe is determined to be within the adjacent mud layer.

4. The method according to claim 2 or 3, characterized in that, The distance between the cavity top depth and the insertion depth of the sleeve shoe is 30 meters.

5. A device for acquiring process parameters of a gas storage facility, used to implement the method for acquiring process parameters of a gas storage facility as described in claim 1, characterized in that, include: The determination module is used to determine the top depth of continuous salt layer sections based on formation parameters; The processing module is used to calculate the cavity top depth and the depth to which the cannula shoe should be inserted based on the top depth of the continuous salt layer segment; wherein the cavity top depth is below the top depth of the continuous salt layer segment, and the insertion depth of the cannula shoe is above the top depth of the continuous salt layer segment. The distance between the cavity top depth and the top depth of the continuous salt layer section is 3 to 5 meters.

6. The apparatus according to claim 5, characterized in that, The processing module is specifically used to determine the insertion depth of the casing shoe by the top depth of the continuous salt layer segment, wherein the insertion depth of the casing shoe is located in the adjacent salt layer above the top depth of the continuous salt layer segment.

7. The apparatus according to claim 5, characterized in that, The processing module is specifically used to determine the sealing degree of the adjacent mud layer above the top depth of the continuous salt layer section based on the formation parameters. The processing module is further configured to determine that the insertion depth of the sleeve shoe is within the adjacent mud layer if the sealing degree of the adjacent mud layer meets the predetermined sealing requirements.

8. The apparatus according to claim 6 or 7, characterized in that, The distance between the cavity top depth and the insertion depth of the sleeve shoe is 30 meters.

9. The apparatus according to claim 5, characterized in that, The continuous salt layer segment includes multiple salt layers, with a mud layer between adjacent salt layers, the thickness of which does not exceed a predetermined thickness threshold.

10. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1-4.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-4.

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