CN113792426B - Method and device for determining gas injection and production amount of underground salt cavern gas storage - Google Patents
Method and device for determining gas injection and production amount of underground salt cavern gas storage Download PDFInfo
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Abstract
The application discloses a method and a device for determining gas injection and production capacity of an underground salt cavern gas storage. Wherein the method comprises the following steps: acquiring a first parameter of a shaft, a second parameter of a salt cavity and an injection and production operation parameter of an underground salt cavern gas storage; according to the first parameter, the second parameter and the injection and production operation parameter, calculating the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage through simulation software; determining the real-time gas storage capacity and gas storage capacity range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical parameters; and determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range. The application solves the technical problem that the stock quantity and the gas injection and production quantity in the underground salt cavern gas storage are difficult to determine.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to a method and a device for determining gas injection and production amount of an underground salt cavern gas storage.
Background
Because the underground salt cavern gas storage has the advantages of high injection and production efficiency, less cushion gas and the like, the underground salt cavern gas storage is greatly developed at present. In the operation process of the underground salt cavern gas storage, parameters such as the storage quantity in a salt cavity, the gas quantity capable of being injected and the gas quantity capable of being extracted are key technical parameters in the operation process of the salt cavern gas storage, and the current method for calibrating the gas quantity adopts a field instrument metering mode, but only the gas quantity injected or extracted through a wellhead can be metered in the mode, so that the storage quantity in the salt cavity, the gas quantity capable of being injected and the gas quantity capable of being extracted cannot be accurately calculated.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining the gas injection and production capacity of an underground salt cavern gas storage, which are used for at least solving the technical problems that the stock quantity and the gas injection and production capacity in the underground salt cavern gas storage are difficult to determine.
According to an aspect of an embodiment of the present application, there is provided a method for determining an injectable gas production amount of an underground salt cavern gas storage including at least a wellbore and a salt cavity, the method comprising: acquiring a first parameter of the shaft, a second parameter of the salt cavity and an injection and production operation parameter of the underground salt cavern gas storage; according to the first parameter, the second parameter and the injection and production operation parameter, calculating the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage through simulation software; determining the real-time gas storage amount and the gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical parameters; and determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range.
Optionally, acquiring well completion design data and sonar cavity measurement data of the underground salt cavern gas storage; determining a first parameter of the wellbore according to the well completion design data, wherein the wellbore comprises a gas injection string, and the first parameter at least comprises: the outer diameter, the wall thickness, the inner diameter and the bottom of the gas injection and production pipe column are deep; determining a second parameter of the salt cavity according to the sonar cavity measurement data, wherein the second parameter at least comprises: the shape, volume, top burial depth and bottom burial depth of the salt cavity; acquiring injection and production operation parameters of the underground salt cavern gas storage when injecting and producing gas, wherein the injection and production operation parameters at least comprise: real-time operating pressure, maximum operating pressure, minimum operating pressure, real-time operating temperature, maximum operating temperature and minimum operating temperature.
Optionally, calculating the temperature and pressure parameters of the underground salt cavern gas storage by using first simulation software according to the first parameter, the second parameter and the injection and production operation parameter; and calculating gas physical parameters of the underground salt cavern gas storage by using second simulation software according to the temperature and pressure parameters.
Optionally, a model of the underground salt cavern gas storage is built in the first simulation software according to the first parameter and the second parameter, wherein the structure of the model at least comprises: a wellbore portion and a salt chamber portion; the injection and production operation parameters are input into the shaft part as boundary conditions, and the temperature and pressure parameters in the salt cavity part are calculated through a finite element method.
Optionally, the model of the underground salt cavern gas storage is a thermodynamic coupling model, and the thermodynamic coupling model includes: and (3) the temperature effect when gas is injected and produced, and the gas is thermally coupled with surrounding rock, wherein the gas in the shaft part and the surrounding rock do not have heat exchange, and the gas in the salt cavity part and the surrounding rock have heat exchange.
Optionally, the physical property calculation database is called by the second simulation software to calculate the temperature and pressure parameters, so as to obtain the gas physical property parameters of the underground salt cavern gas storage, wherein the gas physical property parameters at least comprise: the compression factor and density of the gas in the underground salt cavern gas storage under the temperature and pressure parameters.
Optionally, determining a first temperature pressure parameter and a first gas physical parameter corresponding to the real-time operation pressure and the real-time operation temperature, and substituting the first temperature pressure parameter and the first gas physical parameter into a real gas state equation to obtain the real-time gas storage volume; determining a second temperature and pressure parameter and a second gas physical parameter corresponding to the maximum operating pressure and the maximum operating temperature, and substituting the second temperature and pressure parameter and the second gas physical parameter into a real gas state equation to obtain the maximum gas storage amount; determining a third temperature and pressure parameter and a third gas physical property parameter corresponding to the minimum operating pressure and the minimum operating temperature, and substituting the third temperature and pressure parameter and the third gas physical property parameter into a real gas state equation to obtain a minimum gas storage amount; and determining the gas storage amount range according to the maximum gas storage amount and the minimum gas storage amount.
Optionally, determining the injectable gas volume according to the maximum gas storage volume and the real-time gas storage volume; and determining the recoverable gas output according to the minimum gas storage amount and the real-time gas storage amount.
According to another aspect of the embodiments of the present application, there is also provided an apparatus for determining an injectable gas production amount of an underground salt cavern gas storage including at least a wellbore and a salt cavity, the apparatus comprising: the acquisition module is used for acquiring the first parameter of the shaft, the second parameter of the salt cavity and the injection and production operation parameter of the underground salt cavern gas storage; the calculation module is used for calculating the temperature and pressure parameters and gas physical parameters of the underground salt cavern gas storage through simulation software according to the first parameter, the second parameter and the injection and production operation parameter; the first determining module is used for determining the real-time gas storage amount and the gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical property parameters; and the second determining module is used for determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range.
According to another aspect of the embodiment of the application, a nonvolatile storage medium is provided, the nonvolatile storage medium comprises a stored program, and when the program runs, equipment where the nonvolatile storage medium is located is controlled to execute the method for determining the gas injection and production rate of the underground salt cavern gas storage.
In the embodiment of the application, first parameters of a shaft of an underground salt cavern gas storage, second parameters of a salt cavity and injection and production operation parameters of the underground salt cavern gas storage are acquired; modeling through simulation software according to the first parameter, the second parameter and the injection and production operation parameter, and calculating to obtain the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage; and then determining the real-time gas storage amount and gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical parameters, and determining the injectable gas amount and the recoverable gas amount of the underground salt cavern gas storage according to the real-time gas storage amount and the gas storage amount range. The method comprises the steps of acquiring relevant parameters of the underground salt cavern gas storage, accurately modeling the running state of the underground salt cavern gas storage by using simulation software, and accurately calculating the real-time gas storage and the gas injection and production capacity of the underground salt cavern gas storage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of a method for determining gas production capacity of an underground salt cavern gas storage according to an embodiment of the application;
FIG. 2 is a schematic diagram of an underground salt cavern gas reservoir according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a method for determining gas production capacity of an underground salt cavern gas storage according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present application, there is provided a method of determining gas production capacity of an underground salt cavern gas reservoir, it being noted that the steps illustrated in the flow chart of the drawings may be performed in a computer system such as a set of computer executable instructions, and although a logical sequence is illustrated in the flow chart, in some cases, the steps illustrated or described may be performed in a different order than that illustrated herein.
FIG. 1 is a method for determining the gas injection and production capacity of an underground salt cavern gas storage according to an embodiment of the application, as shown in FIG. 1, and the method comprises the following steps:
step S102, acquiring first parameters of a shaft, second parameters of a salt cavity and injection and production operation parameters of an underground salt cavern gas storage.
In general, an underground salt cavern gas storage can be divided into a shaft and a salt cavity, and fig. 2 shows a schematic structural diagram of the underground salt cavern gas storage, wherein the shaft and the salt cavity are both located below the ground surface, and surrounding rock is arranged on the outer side of the shaft and is mainly used for gas injection or gas production through the shaft.
When calculating the real-time gas storage capacity and the gas-injection capacity of the underground salt cavern gas storage, modeling can be firstly carried out on the underground salt cavern gas storage, and in order to ensure the accuracy of the model, the related parameters of the underground salt cavern gas storage need to be acquired, and the method mainly comprises the following steps: wellbore parameters, salt cavity parameters, and injection and production run parameters.
In some optional embodiments of the present application, well completion design data and sonar cavity measurement data of an underground salt cavern gas storage can be obtained first, wherein well completion refers to a process that a well bore reaches a designed well depth and is connected with a salt cavity in a certain structure, and relevant parameters of the well bore can be obtained by collecting design data in a well completion design scheme; and the sonar cavity measurement data are relevant parameters of the salt cavity, which are measured by a sonar cavity measurement technology. Specifically, a first parameter of the wellbore may be determined from completion design data, wherein the wellbore primarily includes a gas injection string, the first parameter comprising at least: the outer diameter, the wall thickness, the inner diameter and the bottom of the gas injection and production pipe column are deep; meanwhile, a second parameter of the salt cavity can be determined according to sonar cavity measurement data, wherein the second parameter at least comprises: the shape, volume, top burial depth and bottom burial depth of the salt cavity.
In the actual production process, injection and production operation parameters of the underground salt cavern gas storage in gas injection and production can be obtained, wherein the injection and production operation parameters at least comprise: real-time operating pressure, maximum operating pressure, minimum operating pressure, real-time operating temperature, maximum operating temperature and minimum operating temperature, and may also include injection and production gas rates, etc.
And step S104, calculating the temperature and pressure parameters and the gas physical parameters of the underground salt cavern gas storage by simulation software according to the first parameter, the second parameter and the injection and production operation parameter.
After the first parameter, the second parameter and the injection and production operation parameter are obtained, the temperature and pressure parameters of the underground salt cavern gas storage can be calculated through first simulation software according to the parameters; and then calculating gas physical parameters of the underground salt cavern gas storage through second simulation software according to the temperature and pressure parameters, wherein the gas physical parameters mainly comprise compression factors and densities of the gas in the underground salt cavern gas storage under the corresponding temperature and pressure parameters.
Specifically, when calculating the temperature and pressure parameters, a model of the underground salt cavern gas storage can be built in first simulation software according to the first parameters and the second parameters, wherein the first simulation software can use com software, and the built model structure at least comprises: a wellbore portion and a salt chamber portion; the temperature and pressure parameters in the salt chamber section are then calculated by a finite element method by inputting injection and production operating parameters at the entrance of the wellbore section as boundary conditions.
Optionally, the model of the underground salt cavern gas storage can be a shaft-salt cavity integrated thermodynamic coupling model, and the thermodynamic coupling model at least comprises: temperature effects when gas is injected and produced and thermal coupling of the gas and surrounding rock. Wherein, as shown in fig. 2, due to the high flow rate of the gas in the wellbore, it can be considered as an adiabatic flow, i.e. there is no heat exchange between the gas in the wellbore section and the surrounding rock; the surface area of the salt cavity part is large, and the influence of the surrounding rock temperature on the gas in the cavity must be considered, so that the gas in the salt cavity part and the surrounding rock in the model have heat exchange.
After the temperature and pressure parameters are obtained, the physical property calculation database can be called by the second simulation software to calculate the temperature and pressure parameters, so that the gas physical property parameters of the underground salt cavern gas storage are obtained. The second simulation software may use matlab software, and the physical property calculation database may use a coolprop physical property open source calculation database developed based on c++, which can solve the remaining physical property parameters by inputting two gas physical property parameters.
Specifically, the coolprop database installed in python can be called by matlab software to calculate the temperature and pressure parameters, so that the compression factor Z and the density D of the gas in the underground salt cavern gas storage under different temperature and pressure can be obtained. Because the gas stored in the salt cavity is mainly natural gas, and the natural gas belongs to mixed gas, the components and the ratio of the components of the natural gas need to be known when the physical parameters of the natural gas are solved, and then the compression factors Z and the densities D of the natural gas at different temperatures and pressures are calculated, wherein:
z (i, j) =py.coolprop.coolprop.propsi ('Z', 'T', T (i), 'P', P9 j), 'natural gas component'
D (i, j) =py.coolprop.coolprop.propsi (' D, ' T ', T (i), ' P ', P (j), ' natural gas component ')
And S106, determining the real-time gas storage amount and the gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical property parameters.
Specifically, when the real-time gas storage amount is calculated, a first temperature pressure parameter and a first gas physical parameter corresponding to the real-time operating pressure and the real-time operating temperature can be determined, and the first temperature pressure parameter and the first gas physical parameter are substituted into a real gas state equation to obtain the real-time gas storage amount.
Assuming that the real-time temperature in the salt cavity is T r The real-time pressure is P r Compression factor of natural gas at the real-time temperature and pressureZ is the son r Density ρ r Substituting these parameters into the true gas state equation
PV＝nZRT
Wherein the amount n of natural gas material in this state is:
therefore, the real-time gas storage capacity G of the underground salt cavern gas storage can be obtained r The method comprises the following steps:
wherein V is the volume of the salt cavity, M g Is the relative molecular mass of natural gas, R is the ideal gas constant.
Similarly, when the gas storage amount range is calculated, a second temperature and pressure parameter and a second gas physical parameter corresponding to the maximum operating pressure and the maximum operating temperature can be determined, and the second temperature and pressure parameter and the second gas physical parameter are substituted into a real gas state equation to obtain the maximum gas storage amount; determining a third temperature and pressure parameter and a third gas physical property parameter corresponding to the minimum operating pressure and the minimum operating temperature, and substituting the third temperature and pressure parameter and the third gas physical property parameter into a real gas state equation to obtain the minimum gas storage capacity; and determining the gas storage range according to the maximum gas storage and the minimum gas storage.
Specifically, assume that the maximum operating temperature is T max Maximum operating pressure P max The compression factor at the maximum operating temperature and pressure is Z max Density ρ max Maximum gas storage G of underground salt cavern gas storage max The method comprises the following steps:
let the minimum operating temperature be T min The minimum operating pressure is P min The compression factor at the minimum operating temperature and pressure is Z min Density ρ min Minimum Chu Qiliang G of underground salt cavern gas storage min The method comprises the following steps:
and S108, determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range.
In particular, it is possible to rely on the maximum gas storage amount G max And real-time gas storage amount G r Determining the amount of gas to be injected G in ：
G in ＝G max -G r
Similarly, the minimum Chu Qiliang G can be used min And real-time gas storage amount G r Determining the recoverable gas output G out ：
G out ＝G r -G min
Through the process, the real-time gas storage capacity, the injectable gas capacity and the recoverable gas capacity of the underground salt cavern gas storage in the injection and recovery operation process can be accurately calculated, the calculation steps are clear, and the actual engineering requirements can be met.
In the embodiment of the application, first parameters of a shaft of an underground salt cavern gas storage, second parameters of a salt cavity and injection and production operation parameters of the underground salt cavern gas storage are acquired; modeling through simulation software according to the first parameter, the second parameter and the injection and production operation parameter, and calculating to obtain the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage; and then determining the real-time gas storage amount and gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical parameters, and determining the injectable gas amount and the recoverable gas amount of the underground salt cavern gas storage according to the real-time gas storage amount and the gas storage amount range. The method comprises the steps of acquiring relevant parameters of the underground salt cavern gas storage, accurately modeling the running state of the underground salt cavern gas storage by using simulation software, and accurately calculating the real-time gas storage and the gas injection and production capacity of the underground salt cavern gas storage.
Example 2
According to an embodiment of the present application, there is further provided an underground salt cavern gas storage gas injection/production amount determining apparatus for implementing the above method for determining underground salt cavern gas storage gas injection/production amount, as shown in fig. 3, the apparatus includes an obtaining module 30, a calculating module 32, a first determining module 34 and a second determining module 36, where:
the acquiring module 30 is configured to acquire a first parameter of the wellbore, a second parameter of the salt cavity, and an injection and production operation parameter of the underground salt cavern gas storage.
In some optional embodiments of the present application, well completion design data and sonar cavity measurement data of an underground salt cavern gas storage can be obtained first, wherein well completion refers to a process that a well bore reaches a designed well depth and is connected with a salt cavity in a certain structure, and relevant parameters of the well bore can be obtained by collecting design data in a well completion design scheme; and the sonar cavity measurement data are relevant parameters of the salt cavity, which are measured by a sonar cavity measurement technology. Specifically, a first parameter of the wellbore may be determined from completion design data, wherein the wellbore primarily includes a gas injection string, the first parameter comprising at least: the outer diameter, the wall thickness, the inner diameter and the bottom of the gas injection and production pipe column are deep; meanwhile, a second parameter of the salt cavity can be determined according to sonar cavity measurement data, wherein the second parameter at least comprises: the shape, volume, top burial depth and bottom burial depth of the salt cavity; in the actual production process, injection and production operation parameters of the underground salt cavern gas storage in gas injection and production can be obtained, wherein the injection and production operation parameters at least comprise: real-time operating pressure, maximum operating pressure, minimum operating pressure, real-time operating temperature, maximum operating temperature and minimum operating temperature, and may also include injection and production gas rates, etc.
The calculating module 32 is configured to calculate the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage through simulation software according to the first parameter, the second parameter and the injection and production operation parameter.
After the first parameter, the second parameter and the injection and production operation parameter are obtained, the temperature and pressure parameters of the underground salt cavern gas storage can be calculated through first simulation software according to the parameters; and then calculating gas physical parameters of the underground salt cavern gas storage through second simulation software according to the temperature and pressure parameters, wherein the gas physical parameters mainly comprise compression factors and densities of the gas in the underground salt cavern gas storage under the corresponding temperature and pressure parameters.
Specifically, when calculating the temperature and pressure parameters, a model of the underground salt cavern gas storage can be built in first simulation software according to the first parameters and the second parameters, wherein the first simulation software can use com software, and the built model structure at least comprises: a wellbore portion and a salt chamber portion; the temperature and pressure parameters in the salt chamber section are then calculated by a finite element method by inputting injection and production operating parameters at the entrance of the wellbore section as boundary conditions. Alternatively, the model of the underground salt cavern gas storage can be a shaft-salt cavity integrated thermodynamic coupling model, and the thermodynamic coupling model at least comprises: temperature effects when gas is injected and produced and thermal coupling of the gas and surrounding rock. Wherein the gas in the wellbore section is not in heat exchange with the surrounding rock and the gas in the salt chamber section is in heat exchange with the surrounding rock.
After the temperature and pressure parameters are obtained, the physical property calculation database can be called by the second simulation software to calculate the temperature and pressure parameters, so that the gas physical property parameters of the underground salt cavern gas storage are obtained. Wherein, the second simulation software can use matlab software, and the physical property calculation database can use coolprop database. Specifically, the coolprop database installed in python can be called by matlab software to calculate the temperature and pressure parameters, so that the compression factor Z and the density D of the gas in the underground salt cavern gas storage under different temperature and pressure can be obtained.
The first determining module 34 is configured to determine a real-time gas storage amount and a gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical property parameters.
Specifically, when the real-time gas storage amount is calculated, a first temperature pressure parameter and a first gas physical parameter corresponding to the real-time operating pressure and the real-time operating temperature can be determined, and the first temperature pressure parameter and the first gas physical parameter are substituted into a real gas state equation to obtain the real-time gas storage amount.
When the gas storage amount range is calculated, a second temperature and pressure parameter and a second gas physical parameter corresponding to the maximum operating pressure and the maximum operating temperature can be determined, and the second temperature and pressure parameter and the second gas physical parameter are substituted into a real gas state equation to obtain the maximum gas storage amount; determining a third temperature and pressure parameter and a third gas physical property parameter corresponding to the minimum operating pressure and the minimum operating temperature, and substituting the third temperature and pressure parameter and the third gas physical property parameter into a real gas state equation to obtain the minimum gas storage capacity; and determining the gas storage range according to the maximum gas storage and the minimum gas storage.
The second determining module 36 is configured to determine the injectable gas amount and the recoverable gas amount of the underground salt cavern gas storage according to the real-time gas storage amount and the gas storage amount range.
Specifically, the injectable gas volume can be determined according to the maximum gas storage volume and the real-time gas storage volume, and the recoverable gas volume can be determined according to the minimum gas storage volume and the real-time gas storage volume.
It should be noted that, each module in the device for injecting gas production in the underground salt cavern gas storage in the embodiment of the present application corresponds to the implementation steps of the method for injecting gas production in the underground salt cavern gas storage in embodiment 1 one by one, and since detailed description has been made in embodiment 1, details not shown in the embodiment may refer to embodiment 1, and will not be repeated here.
Example 3
According to an embodiment of the present application, there is also provided a nonvolatile storage medium including a stored program, where the device in which the nonvolatile storage medium is controlled to execute the above method when the program runs.
Optionally, the program controls the device in which the nonvolatile storage medium is located to execute the following steps when running: acquiring a first parameter of a shaft, a second parameter of a salt cavity and an injection and production operation parameter of an underground salt cavern gas storage; according to the first parameter, the second parameter and the injection and production operation parameter, calculating the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage through simulation software; determining the real-time gas storage capacity and gas storage capacity range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical parameters; and determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of units may be a logic function division, and there may be another division manner in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (6)
1. The method for determining the gas injection and production capacity of the underground salt cavern gas storage is characterized in that the underground salt cavern gas storage at least comprises a shaft and a salt cavity, and comprises the following steps:
acquiring a first parameter of the shaft, a second parameter of the salt cavity and an injection and production operation parameter of the underground salt cavern gas storage, wherein the shaft comprises an injection and production gas pipe column, and the first parameter at least comprises: the outer diameter, the wall thickness, the inner diameter and the bottom of the gas injection and production pipe column are deep, and the second parameters at least comprise: the shape, volume, top burial depth and bottom burial depth of the salt cavity;
according to the first parameter, the second parameter and the injection and production operation parameter, calculating the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage through simulation software;
determining the real-time gas storage amount and the gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical parameters;
determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range;
according to the first parameter, the second parameter and the injection and production operation parameter, calculating the temperature and pressure parameter and the gas physical parameter of the underground salt cavern gas storage through simulation software, wherein the method comprises the following steps: according to the first parameter and the second parameter, a model of the underground salt cavern gas storage is established in first simulation software, wherein the model is a thermodynamic coupling model, and the structure of the model at least comprises: a wellbore section and a salt cavity section, the thermal coupling model comprising: a temperature effect when gas is injected and produced, and thermal coupling of the gas and surrounding rock, wherein the gas in the shaft part and the surrounding rock do not have heat exchange, and the gas in the salt cavity part and the surrounding rock have heat exchange; inputting the injection and production operation parameters into the shaft part as boundary conditions, and calculating the temperature and pressure parameters in the salt cavity part by a finite element method; and calling a physical property calculation database through second simulation software to calculate the temperature and pressure parameters to obtain gas physical property parameters of the underground salt cavern gas storage, wherein the gas physical property parameters at least comprise: the compression factor and density of the gas in the underground salt cavern gas storage under the temperature and pressure parameters.
2. The method of claim 1, wherein obtaining the first parameter of the wellbore, the second parameter of the salt cavity, and the injection and production operating parameter of the subsurface salt cavern gas reservoir comprises:
acquiring well completion design data and sonar cavity measurement data of the underground salt cavern gas storage;
determining a first parameter of the wellbore from the completion design data;
determining a second parameter of the salt cavity according to the sonar cavity measurement data;
acquiring injection and production operation parameters of the underground salt cavern gas storage when injecting and producing gas, wherein the injection and production operation parameters at least comprise: real-time operating pressure, maximum operating pressure, minimum operating pressure, real-time operating temperature, maximum operating temperature and minimum operating temperature.
3. The method of claim 2, wherein determining the real-time gas storage volume and gas storage volume range of the underground salt cavern gas storage based on the temperature and pressure parameters and the gas physical parameters comprises:
determining a first temperature and pressure parameter and a first gas physical parameter corresponding to the real-time operation pressure and the real-time operation temperature, and substituting the first temperature and pressure parameter and the first gas physical parameter into a real gas state equation to obtain the real-time gas storage quantity;
determining a second temperature and pressure parameter and a second gas physical parameter corresponding to the maximum operating pressure and the maximum operating temperature, and substituting the second temperature and pressure parameter and the second gas physical parameter into a real gas state equation to obtain the maximum gas storage amount;
determining a third temperature and pressure parameter and a third gas physical property parameter corresponding to the minimum operating pressure and the minimum operating temperature, and substituting the third temperature and pressure parameter and the third gas physical property parameter into a real gas state equation to obtain a minimum gas storage amount;
and determining the gas storage amount range according to the maximum gas storage amount and the minimum gas storage amount.
4. The method of claim 3, wherein determining the injectable and recoverable gas volumes of the underground salt cavern gas storage based on the real-time gas storage volume and the gas storage volume range comprises:
determining the injectable gas volume according to the maximum gas storage volume and the real-time gas storage volume;
and determining the recoverable gas output according to the minimum gas storage amount and the real-time gas storage amount.
5. An underground salt cavern gas storage gas injection and production amount determining device, which is characterized in that the underground salt cavern gas storage comprises at least a shaft and a salt cavity, and the device comprises:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first parameter of a shaft, a second parameter of a salt cavity and an injection and production operation parameter of an underground salt cavern gas storage, the shaft comprises an injection and production gas pipe column, and the first parameter at least comprises: the outer diameter, the wall thickness, the inner diameter and the bottom of the gas injection and production pipe column are deep, and the second parameters at least comprise: the shape, volume, top burial depth and bottom burial depth of the salt cavity;
the calculation module is used for calculating the temperature and pressure parameters and the gas physical parameters of the underground salt cavern gas storage through simulation software according to the first parameter, the second parameter and the injection and production operation parameter, and comprises the following steps: according to the first parameter and the second parameter, a model of the underground salt cavern gas storage is established in first simulation software, wherein the model is a thermodynamic coupling model, and the structure of the model at least comprises: a wellbore section and a salt cavity section, the thermal coupling model comprising: a temperature effect when gas is injected and produced, and thermal coupling of the gas and surrounding rock, wherein the gas in the shaft part and the surrounding rock do not have heat exchange, and the gas in the salt cavity part and the surrounding rock have heat exchange; inputting the injection and production operation parameters into the shaft part as boundary conditions, and calculating the temperature and pressure parameters in the salt cavity part by a finite element method; and calling a physical property calculation database through second simulation software to calculate the temperature and pressure parameters to obtain gas physical property parameters of the underground salt cavern gas storage, wherein the gas physical property parameters at least comprise: the compression factor and density of the gas in the underground salt cavern gas storage under the temperature and pressure parameters;
the first determining module is used for determining the real-time gas storage amount and the gas storage amount range of the underground salt cavern gas storage according to the temperature and pressure parameters and the gas physical property parameters;
and the second determining module is used for determining the injectable gas and the recoverable gas of the underground salt cavern gas storage according to the real-time gas storage and the gas storage range.
6. A non-volatile storage medium, characterized in that the non-volatile storage medium comprises a stored program, wherein the program, when run, controls a device in which the non-volatile storage medium is located to perform the method for determining the gas production capacity of the underground salt cavern gas storage of any one of claims 1 to 4.
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| CN113250749A (en) * | 2021-06-22 | 2021-08-13 | 中国石油化工股份有限公司西北油田分公司 | Simulation method and system for condensate gas reservoir type gas storage |
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| CN113250749A (en) * | 2021-06-22 | 2021-08-13 | 中国石油化工股份有限公司西北油田分公司 | Simulation method and system for condensate gas reservoir type gas storage |
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