Salt-cavern gas storage gas-liquid interface measurement method and system based on low-frequency electric signal

A technology of gas-liquid interface and measurement method, which is applied to the liquid level indicator for physical variable measurement, etc., can solve the problems that the measurement method is easily affected by the environment, measurement errors, etc., and achieves long service life, reduced replacement times, and less interference in use. Effect

Active Publication Date: 2021-09-07
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0005] In order to solve the problem that the existing gas-liquid interface measurement method of salt-cavern gas storage is easily affected by the environment and has measurement errors, in the first aspect of the present invention, a method for measuring the gas-liquid interface of salt-cavern gas storage based on low-frequency electrical signals is provided. Including: installing the insulating pup joint at the joint of the two sections of the central tube, installing the excitation source on the outer wall of the insulating pup joint, and the positive and negative poles of the excitation source are respectively connected to the center tube above the insulating pup joint and the center below the insulating pup joint. The outer wall of the tube is connected; the voltage measuring device is installed on the outer wall of the central tube

Method used

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  • Salt-cavern gas storage gas-liquid interface measurement method and system based on low-frequency electric signal
  • Salt-cavern gas storage gas-liquid interface measurement method and system based on low-frequency electric signal
  • Salt-cavern gas storage gas-liquid interface measurement method and system based on low-frequency electric signal

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Example Embodiment

[0030] Example 1

[0031] refer to figure 1 , In a first aspect provides a measurement method of the present invention libraries salt cavern gas-liquid interface based on low frequency electrical signals, comprising:. S100 insulating short section connecting the two mounting the central tube, the excitation source is mounted in the insulating short section of the outer wall, and an excitation source with the positive and negative electrodes are short sections of the upper center of the insulating tube and the insulating short section of the outer wall below the connection pipe; the voltage measuring means is provided at the center beneath the insulating outer wall of the pipe nipple, and it is located above the maximum height of the gas-liquid interface;. S200 excitation source of a low frequency current signal is applied to the central tube; S300 pipe insulation voltage measuring section short downward and the lower end of a short section of the insulation impedance Z is calculat...

Example Embodiment

[0067] Example 2

[0068] According to a second aspect of the invention, a salt pocket gas-liquid interface measurement system based on a low frequency signal is provided, including: a central tube, an insulating short section, an excitation source, a voltage measuring device, and a computing device, and the insulating short section mounting. At the connection of two central tubes; the excitation source is mounted on the outer wall of the insulating short, and its positive and negative two poles are connected to the outer wall of the center tube above the insulating short section, for pairs The central tube applies a low frequency current signal I; the voltage measuring device is mounted on the outer wall of the center tube under the insulating short section, and is located at the highest height of the gas-liquid interface, and is used to measure the central tube voltage below the insulating short section. 下 The computing device is connected to the excitation source and the voltag...

Example Embodiment

[0074] Example 3

[0075] In a third aspect of the invention, an electronic device comprising: one or more processors; storage means for storing one or more programs, when the one or more programs are used by the one or more programs The processor is executed such that the one or more processors implement the method of the first aspect of the invention.

[0076] Specifically, reference Figure 7 The electronic device 500 can include a processing device (e.g., a central processor, a graphics processor, etc.) 501, which may be loaded from the program stored in the read only memory (ROM) 502 or from the storage device 508 to the random access memory (RAM) 503. The programs are implemented in various appropriate actions and processes. In the RAM 503, the various programs and data required for electronic device 500 are also stored. The processing apparatus 501, the ROM 502, and the RAM 503 are connected to each other through bus 504. The input / output (I / O) interface 505 is also conn...

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Abstract

The invention relates to a salt-cavern gas storage gas-liquid interface measurement method and system based on a low-frequency electric signal. The method comprises the steps of: applying a low-frequency current signal to a central tube by an excitation source; measuring the voltage of a central pipe below the insulating short section, and calculating the impedance Z lower at the lower end of the insulating short section according to the low-frequency current signal<lower>; according to the definition of the low-frequency current signal, the voltage of the central pipe below the insulation short section and the impedance Z<lower> of the lower end of the insulation short section, determining a calculation equation of the distance H between the insulation short section and a gas-liquid interface; and calculating the distance H between the insulating short section and the gas-liquid interface according to the impedance Z<lower> at the lower end of the insulating short section and the calculation equation. Measurement of a salt-cavern gas storage gas-liquid interface is realized by utilizing the property that the characteristic impedance of the central tube is far greater than that of saline water, and the gas-liquid interface is not prone to be influenced by an oil pollution environment and sound wave propagation attenuation; and the measuring system provided by the invention has recoverability, has small interference on the use of the salt-cavern gas storage, has good working stability, and effectively reduces the replacement frequency of underground equipment.

Description

technical field [0001] The invention belongs to the field of salt-cavern gas storage measurement, and in particular relates to a method and system for measuring the gas-liquid interface of a salt-cavern gas storage based on low-frequency electrical signals. Background technique [0002] In recent years, my country's natural gas consumption has grown rapidly, showing a trend of short supply. In order to reduce the peak load of natural gas pipelines and ensure the flexibility and reliability of natural gas supply, the construction of underground gas storage in major consumption areas along natural gas trunk lines has become the mainstream method to ensure the peak-shaving supply of natural gas. There are three main types of underground gas storage: depleted gas reservoir type, aquifer type and salt cavern type. As the name implies, a salt cavern refers to an underground cavity formed by dissolving salt rock in a salt-bearing formation or a salt dome by injecting a solvent suc...

Claims

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Application Information

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IPC IPC(8): G01F23/22
CPCG01F23/22
Inventor 田若言李彦倪谢霆高子涵付正坤陈庆李红斌
Owner HUAZHONG UNIV OF SCI & TECH
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