CN113792426B - Method and device for determining gas injection and production amount of underground salt cavern gas storage - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000002347 injection Methods 0.000 title claims description 32
- 239000007924 injection Substances 0.000 title claims description 32
- 230000000704 physical effect Effects 0.000 claims abstract description 41
- 239000011435 rock Substances 0.000 claims description 16
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- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 12
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- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000009933 burial Methods 0.000 claims description 6
- 230000002277 temperature effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 288
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 239000003345 natural gas Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
本申请公开了一种地下盐穴储气库可注采气量确定方法及装置。其中，该方法包括：获取井筒的第一参数、盐腔的第二参数及地下盐穴储气库的注采运行参数；依据第一参数、第二参数及注采运行参数，通过仿真软件计算地下盐穴储气库的温度压力参数及气体物性参数；依据温度压力参数及气体物性参数确定地下盐穴储气库的实时储气量及储气量范围；依据实时储气量及储气量范围确定地下盐穴储气库的可注入气量和可采出气量。本申请解决了地下盐穴储气库中的库存量及可注采气量难以确定的技术问题。
The present application discloses a method and a device for determining the injectable and recoverable gas volume of an underground salt cavern gas storage. Among them, the method includes: obtaining the first parameter of the wellbore, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt-cavern gas storage; The temperature and pressure parameters and gas physical parameters of the underground salt cavern gas storage; determine the real-time gas storage capacity and gas storage range of the underground salt cavern gas storage based on the temperature, pressure parameters and gas physical property parameters; determine the underground salt gas storage capacity and gas storage range based on the real-time gas storage Injectable gas volume and recoverable gas volume of cavern gas storage. The application solves the technical problem that it is difficult to determine the storage volume and injectable gas volume in the underground salt cavern gas storage.
Description
技术领域technical field
本申请涉及能源存储技术领域，具体而言，涉及一种地下盐穴储气库可注采气量确定方法及装置。The present application relates to the technical field of energy storage, in particular to a method and device for determining the injectable gas volume of an underground salt cavern gas storage.
背景技术Background technique
由于地下盐穴储气库具有注采效率高、所需垫层气少等优点，目前被大力发展。地下盐穴储气库在运行过程中，盐腔内的库存量，可注入气量和可采出气量等参数是盐穴储气库运行过程中关键的技术参数，目前对储气量的标定方法是采用现场仪表计量的方式，但该方式只能计量通过井口注入或者采出的气体量，无法准确地计算出盐腔内的库存量，可注入气量和可采出气量。Due to the advantages of high injection-production efficiency and less cushion gas required, underground salt cavern gas storage is currently being vigorously developed. During the operation of the underground salt-cavern gas storage, parameters such as the storage volume in the salt cavity, the injectable gas volume and the recoverable gas volume are the key technical parameters in the operation process of the salt-cavern gas storage. The current calibration method for the gas storage volume is On-site instrument measurement is used, but this method can only measure the amount of gas injected or produced through the wellhead, and cannot accurately calculate the inventory, injectable gas volume and recoverable gas volume in the salt cavity.
针对上述的问题，目前尚未提出有效的解决方案。For the above problems, no effective solution has been proposed yet.
发明内容Contents of the invention
本申请实施例提供了一种地下盐穴储气库可注采气量确定方法及装置，以至少解决地下盐穴储气库中的库存量及可注采气量难以确定的技术问题。The embodiment of the present application provides a method and device for determining the injectable gas volume of an underground salt cavern gas storage, so as to at least solve the technical problem that it is difficult to determine the storage volume and injectable gas volume of an underground salt cavern gas storage.
根据本申请实施例的一个方面，提供了一种地下盐穴储气库可注采气量确定方法，所述地下盐穴储气库至少包括井筒和盐腔，所述方法包括：获取所述井筒的第一参数、所述盐腔的第二参数及所述地下盐穴储气库的注采运行参数；依据所述第一参数、所述第二参数及所述注采运行参数，通过仿真软件计算所述地下盐穴储气库的温度压力参数及气体物性参数；依据所述温度压力参数及所述气体物性参数确定所述地下盐穴储气库的实时储气量及储气量范围；依据所述实时储气量及所述储气量范围确定所述地下盐穴储气库的可注入气量和可采出气量。According to an aspect of an embodiment of the present application, a method for determining the injectable gas volume of an underground salt-cavern gas storage is provided, the underground salt-cavern gas storage at least includes a wellbore and a salt cavity, and the method includes: obtaining the wellbore The first parameter of the salt cavity, the second parameter of the salt cavity and the injection-production operation parameter of the underground salt cavern gas storage; according to the first parameter, the second parameter and the injection-production operation parameter, through simulation The software calculates the temperature and pressure parameters and gas physical parameters of the underground salt cavern gas storage; according to the temperature and pressure parameters and the gas physical parameters, determine the real-time gas storage capacity and gas storage range of the underground salt cavern gas storage; The real-time gas storage volume and the gas storage volume range determine the injectable gas volume and recoverable gas volume of the underground salt cavern gas storage.
可选地，获取所述地下盐穴储气库的完井设计数据和声呐测腔数据；依据所述完井设计数据确定所述井筒的第一参数，其中，所述井筒包括注采气管柱，所述第一参数至少包括：所述注采气管柱的外径、壁厚、内径和底部下深；依据所述声呐测腔数据确定所述盐腔的第二参数，其中，所述第二参数至少包括：所述盐腔的形状、体积、顶部埋深和底部埋深；获取所述地下盐穴储气库在注采气体时的注采运行参数，其中，所述注采运行参数至少包括：实时运行压力，最大运行压力，最小运行压力，实时运行温度，最大运行温度及最小运行温度。Optionally, the well completion design data and sonar cavity measurement data of the underground salt cavern gas storage are acquired; the first parameter of the wellbore is determined according to the well completion design data, wherein the wellbore includes a gas injection and production string , the first parameter at least includes: the outer diameter, wall thickness, inner diameter and bottom depth of the injection-production gas string; the second parameter of the salt cavity is determined according to the sonar cavity measurement data, wherein the first The second parameter at least includes: the shape, volume, top burial depth and bottom burial depth of the salt cavity; obtaining the 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 include: real-time operating pressure, maximum operating pressure, minimum operating pressure, real-time operating temperature, maximum operating temperature and minimum operating temperature.
可选地，依据所述第一参数、所述第二参数及所述注采运行参数，通过第一仿真软件计算所述地下盐穴储气库的温度压力参数；依据所述温度压力参数，通过第二仿真软件计算所述地下盐穴储气库的气体物性参数。Optionally, according to the first parameter, the second parameter and the injection-production operation parameter, the temperature and pressure parameters of the underground salt cavern gas storage are calculated by the first simulation software; according to the temperature and pressure parameters, The gas physical parameters of the underground salt cavern gas storage are calculated by the second simulation software.
可选地，依据所述第一参数和所述第二参数，在所述第一仿真软件中建立所述地下盐穴储气库的模型，其中，所述模型的结构至少包括：井筒部分和盐腔部分；在所述井筒部分输入所述注采运行参数作为边界条件，通过有限元方法计算所述盐腔部分中的所述温度压力参数。Optionally, according to the first parameter and the second parameter, a model of the underground salt cavern gas storage is established in the first simulation software, wherein the structure of the model at least includes: a wellbore part and The salt cavity part: input the injection-production operation parameters in the wellbore part as boundary conditions, and calculate the temperature and pressure parameters in the salt cavity part by the finite element method.
可选地，所述地下盐穴储气库的模型为热力耦合模型，所述热力耦合模型中包括：注采气体时的温度效应，气体与围岩的热耦合，其中，所述井筒部分中的气体与所述围岩不存在热量交换，所述盐腔部分中的气体与所述围岩存在热量交换。Optionally, the model of the underground salt cavern gas storage is a thermomechanical coupling model, which includes: the temperature effect during gas injection and production, and the thermal coupling between gas and surrounding rock, wherein, in the wellbore part There is no heat exchange between the gas in the salt cavity and the surrounding rock, and there is heat exchange between the gas in the salt cavity and the surrounding rock.
可选地，通过所述第二仿真软件调用物性计算数据库对所述温度压力参数进行计算，得到所述地下盐穴储气库的气体物性参数，其中，所述气体物性参数至少包括：所述地下盐穴储气库中的气体在所述温度压力参数下的压缩因子和密度。Optionally, the temperature and pressure parameters are calculated by calling the physical property calculation database through the second simulation software to obtain the gas physical property parameters of the underground salt cavern gas storage, wherein the gas physical property parameters include at least: the The compressibility factor and density of the gas in the underground salt cavern gas storage under the temperature and pressure parameters.
可选地，确定在所述实时运行压力和所述实时运行温度下对应的第一温度压力参数及第一气体物性参数，将所述第一温度压力参数及所述第一气体物性参数代入真实气体状态方程，得到所述实时储气量；确定在所述最大运行压力和所述最大运行温度下对应的第二温度压力参数及第二气体物性参数，将所述第二温度压力参数及所述第二气体物性参数代入真实气体状态方程，得到最大储气量；确定在所述最小运行压力和所述最小运行温度下对应的第三温度压力参数及第三气体物性参数，将所述第三温度压力参数及所述第三气体物性参数代入真实气体状态方程，得到最小储气量；依据所述最大储气量和所述最小储气量确定所述储气量范围。Optionally, determine the corresponding first temperature and pressure parameters and first gas physical parameters under the real-time operating pressure and the real-time operating temperature, and substitute the first temperature and pressure parameters and the first gas physical parameters into the actual gas state equation to obtain the real-time gas storage capacity; determine the corresponding second temperature and pressure parameters and second gas physical property parameters under the maximum operating pressure and the maximum operating temperature, and combine the second temperature and pressure parameters and the The second gas physical property parameter is substituted into the real gas state equation to obtain the maximum gas storage capacity; determine the corresponding third temperature pressure parameter and the third gas physical property parameter under the minimum operating pressure and the minimum operating temperature, and set the third temperature Substituting the pressure parameter and the third gas physical property parameter into the real gas state equation to obtain the minimum gas storage capacity; and determining the range of the gas storage capacity according to the maximum gas storage capacity and the minimum gas storage capacity.
可选地，依据所述最大储气量和所述实时储气量确定所述可注入气量；依据所述最小储气量和所述实时储气量确定所述可采出气量。Optionally, the injectable gas volume is determined according to the maximum gas storage volume and the real-time gas storage volume; the recoverable gas volume is determined according to the minimum gas storage volume and the real-time gas storage volume.
根据本申请实施例的另一方面，还提供了一种地下盐穴储气库可注采气量确定装置，所述地下盐穴储气库至少包括井筒和盐腔，所述装置包括：获取模块，用于获取所述井筒的第一参数、所述盐腔的第二参数及所述地下盐穴储气库的注采运行参数；计算模块，用于依据所述第一参数、所述第二参数及所述注采运行参数，通过仿真软件计算所述地下盐穴储气库的温度压力参数及气体物性参数；第一确定模块，用于依据所述温度压力参数及所述气体物性参数确定所述地下盐穴储气库的实时储气量及储气量范围；第二确定模块，用于依据所述实时储气量及所述储气量范围确定所述地下盐穴储气库的可注入气量和可采出气量。According to another aspect of the embodiment of the present application, a device for determining the injectable gas volume of an underground salt cavern gas storage is also provided, the underground salt cavern gas storage at least includes a wellbore and a salt cavity, and the device includes: an acquisition module , used to obtain the first parameter of the wellbore, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt-cavern gas storage; the calculation module is used to obtain the first parameter, the second parameter The second parameter and the injection-production operation parameters are used to calculate the temperature and pressure parameters and gas physical parameters of the underground salt cavern gas storage through simulation software; the first determination module is used to calculate the temperature and pressure parameters and the gas physical parameters according to the temperature and pressure parameters. Determine the real-time gas storage volume and gas storage volume range of the underground salt cavern gas storage; the second determination module is used to determine the injectable gas volume of the underground salt cavern gas storage according to the real-time gas storage volume and the gas storage volume range and recoverable gas volume.
根据本申请实施例的另一方面，还提供了一种非易失性存储介质，所述非易失性存储介质包括存储的程序，其中，在所述程序运行时控制所述非易失性存储介质所在设备执行上述的地下盐穴储气库可注采气量确定方法。According to another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium, the non-volatile storage medium includes a stored program, wherein the non-volatile memory is controlled when the program is running. The equipment where the storage medium is located implements the above-mentioned method for determining the injectable and recoverable gas volume of the underground salt cavern gas storage.
在本申请实施例中，首先获取地下盐穴储气库的井筒的第一参数、盐腔的第二参数及地下盐穴储气库的注采运行参数；依据第一参数、第二参数及注采运行参数，通过仿真软件进行建模并计算得到地下盐穴储气库的温度压力参数及气体物性参数；然后依据温度压力参数及气体物性参数确定地下盐穴储气库的实时储气量及储气量范围，并依据实时储气量及储气量范围确定地下盐穴储气库的可注入气量和可采出气量。其中，通过获取地下盐穴储气库的相关参数，可以利用仿真软件对其运行状态精确建模，从而准确计算出地下盐穴储气库的实时储气量及可注采气量，该过程简单且准确，有效解决了地下盐穴储气库中的库存量及可注采气量难以确定技术问题。In the embodiment of the present application, the first parameter of the wellbore of the underground salt-cavern gas storage, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt-cavern gas storage are obtained; according to the first parameter, the second parameter and The injection-production operation parameters are modeled and calculated by simulation software to obtain the temperature, pressure parameters and gas physical parameters of the underground salt cavern gas storage; Gas storage range, and determine the injectable gas volume and recoverable gas volume of the underground salt cavern gas storage according to the real-time gas storage volume and gas storage range. Among them, by obtaining the relevant parameters of the underground salt-cavern gas storage, the simulation software can be used to accurately model its operating state, so as to accurately calculate the real-time gas storage capacity and injectable gas volume of the underground salt-cavern gas storage. This process is simple and It is accurate and effectively solves the technical problem that it is difficult to determine the storage volume and injectable gas volume in the underground salt cavern gas storage.
附图说明Description of drawings
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:
图1是根据本申请实施例的地下盐穴储气库可注采气量确定方法的流程示意图；Fig. 1 is a schematic flowchart of a method for determining the injectable and recoverable gas volume of an underground salt cavern gas storage according to an embodiment of the present application;
图2是根据本申请实施例的地下盐穴储气库的结构示意图；Fig. 2 is a schematic structural view of an underground salt cavern gas storage according to an embodiment of the present application;
图3是根据本申请实施例的地下盐穴储气库可注采气量确定方法的结构示意图。Fig. 3 is a schematic structural diagram of a method for determining the injectable and recoverable gas volume of an underground salt cavern gas storage according to an embodiment of the present application.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.
实施例1Example 1
根据本申请实施例，提供了一种地下盐穴储气库可注采气量确定方法，需要说明的是，在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行，并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。According to an embodiment of the present application, a method for determining the injectable and recoverable gas volume of an underground salt cavern gas storage is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be implemented in a computer system such as a set of computer-executable instructions and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.
图1是根据本申请实施例的地下盐穴储气库可注采气量确定方法，如图1所示，该方法包括如下步骤：Fig. 1 is a method for determining the injectable and recoverable gas volume of an underground salt cavern gas storage according to an embodiment of the present application. As shown in Fig. 1, the method includes the following steps:
步骤S102，获取井筒的第一参数、盐腔的第二参数及地下盐穴储气库的注采运行参数。Step S102, obtaining the first parameter of the wellbore, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt-cavern gas storage.
通常，地下盐穴储气库可分为井筒和盐腔两部分，图2示出了一种地下盐穴储气库的结构示意图，其中，井筒与盐腔均位于地表以下，其外侧为围岩，主要通过井筒进行注气或采气。Generally, an underground salt-cavern gas storage can be divided into two parts, the wellbore and the salt cavity. Figure 2 shows a schematic structural diagram of an underground salt-cavern gas storage. The rock is mainly used for gas injection or gas production through the wellbore.
在计算地下盐穴储气库的实时储气量以及可注采气量时，可以先对地下盐穴储气库进行建模，而为了保证模型的精度，就需要获取地下盐穴储气库的相关参数，主要包括：井筒参数、盐腔参数和注采运行参数。When calculating the real-time gas storage capacity and injectable gas volume of the underground salt cavern gas storage, the underground salt cavern gas storage can be modeled first, and in order to ensure the accuracy of the model, it is necessary to obtain the relevant data of the underground salt cavern gas storage. Parameters mainly include: wellbore parameters, salt cavity parameters and injection-production operation parameters.
在本申请一些可选的实施例中，可以先获取地下盐穴储气库的完井设计数据和声呐测腔数据，其中，完井是指井筒到达设计井深后与盐腔以一定结构连接起来的工艺，通过采集完井设计方案中的设计数据，就可以获取井筒的相关参数；而声呐测腔数据则是通过声呐测腔技术测量得到的盐腔相关参数。具体地，可以依据完井设计数据确定井筒的第一参数，其中，井筒主要包括注采气管柱，该第一参数至少包括：注采气管柱的外径、壁厚、内径和底部下深；同时，可以依据声呐测腔数据确定盐腔的第二参数，其中，第二参数至少包括：盐腔的形状、体积、顶部埋深和底部埋深。In some optional embodiments of the present application, the well completion design data and sonar cavity measurement data of the underground salt cavern gas storage can be obtained first, where the well completion refers to the connection of the wellbore with the salt cavern in a certain structure after reaching the designed well depth The related parameters of the wellbore can be obtained by collecting the design data in the completion design scheme; the sonar cavity measurement data are the salt cavity related parameters measured by the sonar cavity measurement technology. Specifically, the first parameter of the wellbore can be determined according to the well completion design data, wherein the wellbore mainly includes a gas injection and production string, and the first parameter at least includes: the outer diameter, wall thickness, inner diameter and bottom depth of the gas injection and production string; At the same time, the second parameter of the salt cavern can be determined according to the sonar cavity measurement data, wherein the second parameter at least includes: the shape, volume, top buried depth and bottom buried depth of the salt cavern.
在实际生产过程中，可以获取地下盐穴储气库在注采气体时的注采运行参数，其中，注采运行参数至少包括：实时运行压力，最大运行压力，最小运行压力，实时运行温度，最大运行温度及最小运行温度，还可以包括注采气速率等。In the actual production process, the injection-production operation parameters of the underground salt cavern gas storage during gas injection and production can be obtained, wherein the injection-production operation parameters at least include: real-time operating pressure, maximum operating pressure, minimum operating pressure, real-time operating temperature, The maximum operating temperature and the minimum operating temperature may also include the rate of gas injection and production, etc.
步骤S104，依据第一参数、第二参数及注采运行参数，通过仿真软件计算地下盐穴储气库的温度压力参数及气体物性参数。Step S104, according to the first parameter, the second parameter and the injection-production operation parameter, the temperature, pressure parameter and gas physical property parameter of the underground salt cavern gas storage are calculated through the simulation software.
在获取上述第一参数、第二参数及注采运行参数后，可以依据这些参数，通过第一仿真软件计算地下盐穴储气库的温度压力参数；然后依据温度压力参数，通过第二仿真软件计算地下盐穴储气库的气体物性参数，其中，气体物性参数主要包括地下盐穴储气库中的气体在对应温度压力参数下的压缩因子和密度。After obtaining the above-mentioned first parameter, second parameter and injection-production operation parameters, the temperature and pressure parameters of the underground salt cavern gas storage can be calculated through the first simulation software according to these parameters; then, according to the temperature and pressure parameters, through the second simulation software Calculate the gas physical parameters of the underground salt cavern gas storage, wherein the gas physical parameters mainly include the compression factor and density of the gas in the underground salt cavern gas storage under the corresponding temperature and pressure parameters.
具体地，在计算温度压力参数时，可以依据上述第一参数和第二参数，在第一仿真软件中建立地下盐穴储气库的模型，其中，第一仿真软件可以使用comsol软件，建立的模型结构至少包括：井筒部分和盐腔部分；然后通过在井筒部分的入口处输入注采运行参数作为边界条件，通过有限元方法计算盐腔部分中的温度压力参数。Specifically, when calculating the temperature and pressure parameters, the model of the underground salt cavern gas storage can be established in the first simulation software according to the above-mentioned first parameter and the second parameter, wherein the first simulation software can use comsol software to establish The model structure at least includes: a wellbore part and a salt cavity part; then, by inputting the injection-production operation parameters at the entrance of the wellbore part as boundary conditions, the temperature and pressure parameters in the salt cavity part are calculated by the finite element method.
可选地，上述建立的地下盐穴储气库的模型可以为井筒-盐腔一体化的热力耦合模型，该热力耦合模型中至少包括：注采气体时的温度效应以及气体与围岩的热耦合。其中，如图2所示，由于气体在井筒内的流速较大，可以视为绝热流动，即井筒部分中的气体与围岩不存在热量交换；而盐腔部分表面积较大，围岩温度对腔内气体的影响必须考虑，所以模型中盐腔部分中的气体与围岩存在热量交换。Optionally, the model of the underground salt cavern gas storage established above can be a wellbore-salt cavity integrated thermal-mechanical coupling model, which at least includes: the temperature effect during gas injection and production, and the thermal coupling. Among them, as shown in Fig. 2, due to the high flow velocity of the gas in the wellbore, it can be regarded as an adiabatic flow, that is, there is no heat exchange between the gas in the wellbore and the surrounding rock; while the surface area of the salt cavern is relatively large, the temperature of the surrounding rock is relatively large. The influence of gas in the cavity must be considered, so there is heat exchange between the gas in the salt cavity part of the model and the surrounding rock.
获取温度压力参数后，可以通过第二仿真软件调用物性计算数据库对该温度压力参数进行计算，得到地下盐穴储气库的气体物性参数。其中，第二仿真软件可以使用matlab软件，而物性计算数据库可以使用基于c++开发的coolprop物性开源计算数据库，其可以通过输入两个气体物性参数来求解其余物性参数。After the temperature and pressure parameters are obtained, the physical property calculation database can be invoked by the second simulation software to calculate the temperature and pressure parameters to obtain the gas physical property parameters of the underground salt cavern gas storage. Wherein, the second simulation software can use matlab software, and the physical property calculation database can use the coolprop open source calculation database of physical properties developed based on c++, which can solve the remaining physical property parameters by inputting two gas physical property parameters.
具体地，可以通过matlab软件调用安装在python内的coolprop数据库对温度压力参数进行计算，从而得到地下盐穴储气库中的气体在不同温度压力下的压缩因子Z和密度D。由于盐腔内存储的气体主要为天然气，而天然气属于混合气体，因此在求解天然气物性参数时需要知道天然气的组分及各组分占比，然后计算天然气在不同温度压力下的压缩因子Z和密度D，其中：Specifically, the coolprop database installed in python can be used to calculate the temperature and pressure parameters through the matlab software, so as to obtain the compression factor Z and density D of the gas in the underground salt cavern gas storage at different temperatures and pressures. Since the gas stored in the salt cavern is mainly natural gas, and natural gas is a mixed gas, it is necessary to know the components and proportions of the natural gas when solving the physical parameters of the natural gas, and then calculate the compressibility factor Z and Density D, where:
Z(i，j)＝py.CoolProp.CoolProp.PropsSI(′Z′，′T′，T(i)，′P′，P9j)，′天然气组分′)Z(i,j) = py.CoolProp.CoolProp.PropsSI('Z','T',T(i),'P',P9j),'natural gas component')
D(i，j)＝py.CoolProp.CoolProp.PropsSI(′D，′T′，T(i)，′P′，P(j)，′天然气组分′)D(i,j)=py.CoolProp.CoolProp.PropsSI('D,'T',T(i),'P',P(j),'natural gas component')
步骤S106，依据温度压力参数及气体物性参数确定地下盐穴储气库的实时储气量及储气量范围。Step S106, determining the real-time gas storage volume and gas storage volume range of the underground salt cavern gas storage according to the temperature, pressure parameters and gas physical property parameters.
具体地，在计算实时储气量时，可以确定在实时运行压力和实时运行温度下对应的第一温度压力参数及第一气体物性参数，将第一温度压力参数及第一气体物性参数代入真实气体状态方程，得到实时储气量。Specifically, when calculating the real-time gas storage capacity, the first temperature and pressure parameters and the first gas physical property parameters corresponding to the real-time operating pressure and real-time operating temperature can be determined, and the first temperature and pressure parameters and the first gas physical property parameters can be substituted into the real gas Equation of state to obtain real-time gas storage capacity.
假设盐腔内的实时温度为Tr，实时压力为Pr，天然气在该实时温度压力下的压缩因子为Zr，密度为ρr，将这些参数代入真实气体状态方程Assuming that the real-time temperature in the salt chamber is T r , the real-time pressure is P r , the compression factor of natural gas at this real-time temperature and pressure is Z r , and the density is ρ r , these parameters are substituted into the real gas state equation
PV＝nZRTPV=nZRT
其中，该状态下的天然气物质的量n为：Wherein, the amount n of the natural gas substance in this state is:
因此可以求出地下盐穴储气库的实时储气量Gr为：Therefore, the real-time gas storage capacity G r of the underground salt cavern gas storage can be calculated as:
其中，V是盐腔的容积，Mg是天然气的相对分子质量，R为理想气体常数。Among them, V is the volume of the salt chamber, Mg is the relative molecular mass of natural gas, and R is the ideal gas constant.
同理，在计算储气量范围时，可以确定在最大运行压力和最大运行温度下对应的第二温度压力参数及第二气体物性参数，将第二温度压力参数及第二气体物性参数代入真实气体状态方程，得到最大储气量；确定在最小运行压力和最小运行温度下对应的第三温度压力参数及第三气体物性参数，将第三温度压力参数及第三气体物性参数代入真实气体状态方程，得到最小储气量；依据最大储气量和最小储气量确定储气量范围。Similarly, when calculating the range of gas storage capacity, it is possible to determine the corresponding second temperature, pressure parameter and second gas physical property parameter under the maximum operating pressure and maximum operating temperature, and substitute the second temperature, pressure parameter and second gas physical property parameter into the real gas State equation to obtain the maximum gas storage capacity; determine the corresponding third temperature and pressure parameters and third gas physical property parameters under the minimum operating pressure and minimum operating temperature, and substitute the third temperature, pressure parameters and third gas physical property parameters into the real gas state equation, Get the minimum gas storage capacity; determine the gas storage range based on the maximum gas storage capacity and the minimum gas storage capacity.
具体地，假设最大运行温度为Tmax，最大运行压力为Pmax，则在该最大运行温度压力下的压缩因子为Zmax，密度为ρmax，地下盐穴储气库的最大储气量Gmax为：Specifically, assuming that the maximum operating temperature is T max and the maximum operating pressure is P max , then the compression factor at the maximum operating temperature and pressure is Z max , the density is ρ max , and the maximum gas storage capacity of the underground salt cavern gas storage is G max for:
假设最小运行温度为Tmin，最小运行压力为Pmin，则在该最小运行温度压力下的压缩因子为Zmin，密度为ρmin，地下盐穴储气库的最小储气量Gmin为：Assuming that the minimum operating temperature is T min and the minimum operating pressure is P min , then the compressibility factor at the minimum operating temperature and pressure is Z min , the density is ρ min , and the minimum gas storage capacity G min of the underground salt cavern gas storage is:
步骤S108，依据实时储气量及储气量范围确定地下盐穴储气库的可注入气量和可采出气量。Step S108, determining the injectable gas volume and recoverable gas volume of the underground salt cavern gas storage according to the real-time gas storage volume and gas storage volume range.
具体地，可以依据最大储气量Gmax和实时储气量Gr确定可注入气量Gin：Specifically, the injectable gas volume G in can be determined according to the maximum gas storage capacity G max and the real-time gas storage capacity G r :
Gin＝Gmax-Gr G in = G max -G r
同理，可以依据最小储气量Gmin和实时储气量Gr确定可采出气量Gout：Similarly, the recoverable gas volume G out can be determined based on the minimum gas storage capacity G min and the real-time gas storage capacity G r :
Gout＝Gr-Gmin G out =G r -G min
通过上述过程，可以较为准确地计算出地下盐穴储气库在注采运行过程中的实时储气量、可注入气量及可采出气量，计算步骤清晰，可以满足实际工程需求。Through the above process, the real-time gas storage capacity, injectable gas volume and recoverable gas volume of the underground salt cavern gas storage during the injection-production operation can be calculated more accurately. The calculation steps are clear and can meet the actual engineering needs.
在本申请实施例中，首先获取地下盐穴储气库的井筒的第一参数、盐腔的第二参数及地下盐穴储气库的注采运行参数；依据第一参数、第二参数及注采运行参数，通过仿真软件进行建模并计算得到地下盐穴储气库的温度压力参数及气体物性参数；然后依据温度压力参数及气体物性参数确定地下盐穴储气库的实时储气量及储气量范围，并依据实时储气量及储气量范围确定地下盐穴储气库的可注入气量和可采出气量。其中，通过获取地下盐穴储气库的相关参数，可以利用仿真软件对其运行状态精确建模，从而准确计算出地下盐穴储气库的实时储气量及可注采气量，该过程简单且准确，有效解决了地下盐穴储气库中的库存量及可注采气量难以确定技术问题。In the embodiment of the present application, the first parameter of the wellbore of the underground salt-cavern gas storage, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt-cavern gas storage are obtained; according to the first parameter, the second parameter and The injection-production operation parameters are modeled and calculated by simulation software to obtain the temperature, pressure parameters and gas physical parameters of the underground salt cavern gas storage; Gas storage range, and determine the injectable gas volume and recoverable gas volume of the underground salt cavern gas storage according to the real-time gas storage volume and gas storage range. Among them, by obtaining the relevant parameters of the underground salt-cavern gas storage, the simulation software can be used to accurately model its operating state, so as to accurately calculate the real-time gas storage capacity and injectable gas volume of the underground salt-cavern gas storage. This process is simple and It is accurate and effectively solves the technical problem that it is difficult to determine the storage volume and injectable gas volume in the underground salt cavern gas storage.
实施例2Example 2
根据本申请实施例，还提供了一种用于实现上述地下盐穴储气库可注采气量确定方法的地下盐穴储气库可注采气量确定装置，如图3所示，该装置包括获取模块30，计算模块32，第一确定模块34和第二确定模块36，其中：According to an embodiment of the present application, a device for determining the injectable and recoverable gas volume of an underground salt cavern gas storage for realizing the method for determining the injectable and recoverable gas volume of an underground salt cavern gas storage is provided, as shown in FIG. 3 , the device includes Obtaining module 30, computing module 32, first determining module 34 and second determining module 36, wherein:
获取模块30，用于获取井筒的第一参数、盐腔的第二参数及地下盐穴储气库的注采运行参数。The obtaining module 30 is used to obtain the first parameter of the wellbore, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt-cavern gas storage.
在本申请一些可选的实施例中，可以先获取地下盐穴储气库的完井设计数据和声呐测腔数据，其中，完井是指井筒到达设计井深后与盐腔以一定结构连接起来的工艺，通过采集完井设计方案中的设计数据，就可以获取井筒的相关参数；而声呐测腔数据则是通过声呐测腔技术测量得到的盐腔相关参数。具体地，可以依据完井设计数据确定井筒的第一参数，其中，井筒主要包括注采气管柱，该第一参数至少包括：注采气管柱的外径、壁厚、内径和底部下深；同时，可以依据声呐测腔数据确定盐腔的第二参数，其中，第二参数至少包括：盐腔的形状、体积、顶部埋深和底部埋深；在实际生产过程中，可以获取地下盐穴储气库在注采气体时的注采运行参数，其中，注采运行参数至少包括：实时运行压力，最大运行压力，最小运行压力，实时运行温度，最大运行温度及最小运行温度，还可以包括注采气速率等。In some optional embodiments of the present application, the well completion design data and sonar cavity measurement data of the underground salt cavern gas storage can be obtained first, where the well completion refers to the connection of the wellbore with the salt cavern in a certain structure after reaching the designed well depth The related parameters of the wellbore can be obtained by collecting the design data in the completion design scheme; the sonar cavity measurement data are the salt cavity related parameters measured by the sonar cavity measurement technology. Specifically, the first parameter of the wellbore can be determined according to the well completion design data, wherein the wellbore mainly includes a gas injection and production string, and the first parameter at least includes: the outer diameter, wall thickness, inner diameter and bottom depth of the gas injection and production string; At the same time, the second parameter of the salt cavern can be determined according to the sonar cavity data, wherein the second parameter at least includes: the shape, volume, top buried depth and bottom buried depth of the salt cavern; in the actual production process, the underground salt cavern can be obtained Injection-production operation parameters of the gas storage during gas injection and production, wherein the injection-production operation parameters at least include: 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 Gas injection rate, etc.
计算模块32，用于依据第一参数、第二参数及注采运行参数，通过仿真软件计算地下盐穴储气库的温度压力参数及气体物性参数。The calculation module 32 is used to calculate the temperature, pressure parameters and gas physical parameters of the underground salt cavern gas storage through the simulation software according to the first parameter, the second parameter and the injection-production operation parameters.
在获取上述第一参数、第二参数及注采运行参数后，可以依据这些参数，通过第一仿真软件计算地下盐穴储气库的温度压力参数；然后依据温度压力参数，通过第二仿真软件计算地下盐穴储气库的气体物性参数，其中，气体物性参数主要包括地下盐穴储气库中的气体在对应温度压力参数下的压缩因子和密度。After obtaining the above-mentioned first parameter, second parameter and injection-production operation parameters, the temperature and pressure parameters of the underground salt cavern gas storage can be calculated through the first simulation software according to these parameters; then, according to the temperature and pressure parameters, through the second simulation software Calculate the gas physical parameters of the underground salt cavern gas storage, wherein the gas physical parameters mainly include the compression factor and density of the gas in the underground salt cavern gas storage under the corresponding temperature and pressure parameters.
具体地，在计算温度压力参数时，可以依据上述第一参数和第二参数，在第一仿真软件中建立地下盐穴储气库的模型，其中，第一仿真软件可以使用comsol软件，建立的模型结构至少包括：井筒部分和盐腔部分；然后通过在井筒部分的入口处输入注采运行参数作为边界条件，通过有限元方法计算盐腔部分中的温度压力参数。可选地，地下盐穴储气库的模型可以为井筒-盐腔一体化的热力耦合模型，该热力耦合模型中至少包括：注采气体时的温度效应以及气体与围岩的热耦合。其中，井筒部分中的气体与围岩不存在热量交换，而盐腔部分中的气体与围岩存在热量交换。Specifically, when calculating the temperature and pressure parameters, the model of the underground salt cavern gas storage can be established in the first simulation software according to the above-mentioned first parameter and the second parameter, wherein the first simulation software can use comsol software to establish The model structure at least includes: a wellbore part and a salt cavity part; then, by inputting the injection-production operation parameters at the entrance of the wellbore part as boundary conditions, the temperature and pressure parameters in the salt cavity part are calculated by the finite element method. Optionally, the model of the underground salt-cavern gas storage can be a wellbore-salt cavity integrated thermomechanical coupling model, which at least includes: the temperature effect during gas injection and production, and the thermal coupling between gas and surrounding rock. Among them, there is no heat exchange between the gas in the wellbore part and the surrounding rock, but there is heat exchange between the gas in the salt cavity part and the surrounding rock.
获取温度压力参数后，可以通过第二仿真软件调用物性计算数据库对该温度压力参数进行计算，得到地下盐穴储气库的气体物性参数。其中，第二仿真软件可以使用matlab软件，而物性计算数据库可以使用coolprop数据库。具体地，可以通过matlab软件调用安装在python内的coolprop数据库对温度压力参数进行计算，从而得到地下盐穴储气库中的气体在不同温度压力下的压缩因子Z和密度D。After the temperature and pressure parameters are obtained, the physical property calculation database can be invoked by the second simulation software to calculate the temperature and pressure parameters to obtain the gas physical property parameters of the underground salt cavern gas storage. 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 used to calculate the temperature and pressure parameters through the matlab software, so as to obtain the compression factor Z and density D of the gas in the underground salt cavern gas storage at different temperatures and pressures.
第一确定模块34，用于依据温度压力参数及气体物性参数确定地下盐穴储气库的实时储气量及储气量范围。The first determination module 34 is configured to determine the real-time gas storage capacity and gas storage capacity range of the underground salt cavern gas storage according to the temperature, pressure parameters and gas physical property parameters.
具体地，在计算实时储气量时，可以确定在实时运行压力和实时运行温度下对应的第一温度压力参数及第一气体物性参数，将第一温度压力参数及第一气体物性参数代入真实气体状态方程，得到实时储气量。Specifically, when calculating the real-time gas storage capacity, the first temperature and pressure parameters and the first gas physical property parameters corresponding to the real-time operating pressure and real-time operating temperature can be determined, and the first temperature and pressure parameters and the first gas physical property parameters can be substituted into the real gas Equation of state to obtain real-time gas storage capacity.
在计算储气量范围时，可以确定在最大运行压力和最大运行温度下对应的第二温度压力参数及第二气体物性参数，将第二温度压力参数及第二气体物性参数代入真实气体状态方程，得到最大储气量；确定在最小运行压力和最小运行温度下对应的第三温度压力参数及第三气体物性参数，将第三温度压力参数及第三气体物性参数代入真实气体状态方程，得到最小储气量；依据最大储气量和最小储气量确定储气量范围。When calculating the gas storage range, the second temperature and pressure parameters and the second gas physical property parameters corresponding to the maximum operating pressure and maximum operating temperature can be determined, and the second temperature and pressure parameters and the second gas physical property parameters can be substituted into the real gas state equation, Obtain the maximum gas storage capacity; determine the corresponding third temperature, pressure parameter and third gas physical property parameter under the minimum operating pressure and minimum operating temperature, and substitute the third temperature, pressure parameter and third gas physical property parameter into the real gas state equation to obtain the minimum storage capacity Gas volume: Determine the range of gas storage volume based on the maximum gas storage volume and the minimum gas storage volume.
第二确定模块36，用于依据实时储气量及储气量范围确定地下盐穴储气库的可注入气量和可采出气量。The second determination module 36 is configured to determine the injectable gas volume and recoverable gas volume of the underground salt cavern gas storage according to the real-time gas storage volume and the range of the gas storage volume.
具体地，可以依据最大储气量和实时储气量确定可注入气量，依据最小储气量和实时储气量确定可采出气量。Specifically, the injectable gas volume can be determined according to the maximum gas storage volume and real-time gas storage volume, and the recoverable gas volume can be determined according to the minimum gas storage volume and real-time gas storage volume.
需要说明的是，本申请实施例中的地下盐穴储气库可注采气量装置中的各模块与实施例1中的地下盐穴储气库可注采气量方法实施步骤一一对应，由于实施例1中已经进行了详尽的描述，本实施例中部分未体现的细节可以参考实施例1，在此不再过多赘述。It should be noted that each module in the injectable gas storage device of the underground salt cavern gas storage in the embodiment of the present application corresponds to the implementation steps of the method for the injectable recoverable gas of the underground salt cavern gas storage in Example 1, because Embodiment 1 has been described in detail, and some details that are not reflected in this embodiment can be referred to Embodiment 1, which will not be repeated here.
实施例3Example 3
根据本申请实施例，还提供了一种非易失性存储介质，该非易失性存储介质包括存储的程序，其中，在程序运行时控制非易失性存储介质所在设备执行上述的方法。According to an embodiment of the present application, there is also provided a non-volatile storage medium, the non-volatile storage medium includes a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute the above method.
可选地，在程序运行时控制非易失性存储介质所在设备执行实现以下步骤：获取井筒的第一参数、盐腔的第二参数及地下盐穴储气库的注采运行参数；依据第一参数、第二参数及注采运行参数，通过仿真软件计算地下盐穴储气库的温度压力参数及气体物性参数；依据温度压力参数及气体物性参数确定地下盐穴储气库的实时储气量及储气量范围；依据实时储气量及储气量范围确定地下盐穴储气库的可注入气量和可采出气量。Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following steps: obtain the first parameter of the wellbore, the second parameter of the salt cavity, and the injection-production operation parameters of the underground salt cavern gas storage; The first parameter, the second parameter and the injection-production operation parameters, calculate the temperature and pressure parameters and gas physical parameters of the underground salt cavern gas storage through the simulation software; determine the real-time gas storage capacity of the underground salt cavern gas storage according to the temperature, pressure parameters and gas physical parameters and gas storage range; determine the injectable gas volume and recoverable gas volume of the underground salt cavern gas storage according to the real-time gas storage volume and gas storage range.
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.
在本申请的上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.
在本申请所提供的几个实施例中，应该理解到，所揭露的技术内容，可通过其它的方式实现。其中，以上所描述的装置实施例仅仅是示意性的，例如单元的划分，可以为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，单元或模块的间接耦合或通信连接，可以是电性或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into Another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。A unit described as a separate component may or may not be physically separated, and a component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed over multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes. .
以上仅是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。The above are only the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the application, and these improvements and modifications should also be considered as For the scope of protection of this application.
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