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A Prediction Method for the Volume Shrinkage Rate of Dissolution Cavity in Salt Cavern Underground Gas Storage

A technology of volume shrinkage rate and prediction method, which is applied in the field of prediction of volume shrinkage rate of salt cavern underground gas storage cavity, can solve problems such as gas leakage, achieve accurate and reliable prediction, reduce the number of sonar detection, and reduce leakage effect of risk

Active Publication Date: 2018-03-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] During the use of salt cavern underground gas storage, the method of using sonar equipment to detect the volume shrinkage of the gas storage needs to be carried out in a sealed and pressurized working environment, so that the gas in the gas storage may leak during the detection process risk

Method used

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  • A Prediction Method for the Volume Shrinkage Rate of Dissolution Cavity in Salt Cavern Underground Gas Storage
  • A Prediction Method for the Volume Shrinkage Rate of Dissolution Cavity in Salt Cavern Underground Gas Storage
  • A Prediction Method for the Volume Shrinkage Rate of Dissolution Cavity in Salt Cavern Underground Gas Storage

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Embodiment 1

[0047] The embodiment of the present invention provides a method for predicting the volume shrinkage rate of the dissolution cavity of a salt cavern underground gas storage, see figure 1 , methods include:

[0048] Step 101: Obtain the actual volume shrinkage rate of the dissolved cavity of the salt cavern underground gas storage for n consecutive years, where n is a positive integer greater than 4.

[0049] Among them, the volume shrinkage rate is a key indicator for evaluating the stability of the salt cavern underground gas storage. If the volume shrinkage rate is relatively large, it can reflect the instability of the gas storage. In addition, when the volume shrinkage rate is relatively large, it will also affect the gas storage. The effective working gas volume of the dissolution chamber. Gaseous energy is stored in the solution cavity of the salt cavern underground gas storage, and the gaseous energy can include natural gas and liquefied petroleum gas.

[0050] In pract...

Embodiment 2

[0061] The embodiment of the present invention provides a method for predicting the volume shrinkage rate of the dissolution cavity of a salt cavern underground gas storage, see figure 2 , methods include:

[0062] Step 201: Obtain the actual volume shrinkage rate of the dissolution cavity of the salt cavern underground gas storage for n consecutive years.

[0063] Wherein, n is a positive integer greater than 4.

[0064] In this embodiment, obtaining the actual volume shrinkage rate of the dissolved cavity of the salt cavern underground gas storage for n consecutive years may include:

[0065] Use sonar devices to measure the actual volume of the dissolved cavity of the salt cavern underground gas storage for n consecutive years under pressure;

[0066] According to the actual volume of the dissolved cavity of the salt-cavern underground gas storage for n consecutive years, the actual volume shrinkage rate of the dissolved cavity of the salt-cavern underground gas storage ...

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Abstract

The invention discloses a method for predicting the volume shrinkage rate of a dissolved cavity of a salt cavern underground gas storage, and belongs to the technical field of underground space. The method includes: obtaining the actual volume shrinkage rate of the dissolution cavity for n consecutive years; according to the actual volume shrinkage rate for n consecutive years, combined with gray theory, establishing a GM (1,1) prediction model group, and the GM (1,1) prediction model The group includes m GM(1,1) prediction models; use the first GM(1,1) prediction model to determine the volume shrinkage rate of the dissolution cavity for n consecutive years, obtain n prediction results, and establish a Markov prediction model, Predict the state of the volume shrinkage rate in the next year; determine the average value of the next year's volume shrinkage rate forecast value of the GM (1,1) forecast model group; determine the next year's volume shrinkage rate according to the average value and the state of the volume shrinkage rate volumetric shrinkage. By predicting the volume shrinkage rate in the next year, the present invention reduces the number of times of measurement by using dissolved cavity sonar, and reduces the risk of leakage due to pressure sonar detection.

Description

technical field [0001] The invention relates to the technical field of underground space, in particular to a method for predicting the volumetric shrinkage rate of a dissolved cavity of a salt cavern underground gas storage. Background technique [0002] Energy underground storage is one of the important means of strategic energy storage. Due to the large volume and good sealing properties of salt caverns, the use of deep salt caverns for energy storage has been widely recognized by governments of various countries. In recent years, in order to meet the country's energy storage layout and strategic storage needs, my country has also started the site selection and construction of salt cavern underground energy storage. For example, the Jiangsu Jintan salt cavern gas storage has entered the trial operation stage. Although salt cavern underground gas storage is safe and economical compared to other storage methods, during the use of salt cavern underground gas storage, due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 罗金恒刘新荣李丽锋王军保蔡克郭建强
Owner BC P INC CHINA NAT PETROLEUM CORP
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