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Method for predicting volume shrinkage of cavern in salt-cavern underground gas storage

A technology of volume shrinkage and prediction method, which is applied in the field of prediction of volume shrinkage of dissolved cavity in salt cavern underground gas storage, and can solve problems such as gas leakage

Active Publication Date: 2016-01-06
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Claims
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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

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  • Method for predicting volume shrinkage of cavern in salt-cavern underground gas storage
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  • Method for predicting volume shrinkage of cavern 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 dissolved cavity of the salt cavern underground gas storage, see figure 1 , methods include:

[0048] Step 101: Obtain the actual volumetric 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 ...

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 volume shrinkage of a cavern in a salt-cavern underground gas storage, and belongs to the technical field of underground space. The method comprises: obtaining actual volume shrinkage of the cavern for n consecutive years; establishing a GM(1,1) prediction model group in combination with a grey theory according to the actual volume shrinkage of the cavern for n consecutive years, wherein the GM(1,1) prediction model group comprises m GM(1,1) prediction models; determining volume shrinkage of the cavern for n consecutive years by adopting a first GM(1,1) prediction model, obtaining n prediction results, establishing a Markov prediction model, and predicting a state of volume shrinkage in next year; determining an average value of volume shrinkage prediction values of the GM(1,1) prediction model group in the next year; and according to the average value and the state of the volume shrinkage, determining the volume shrinkage in the next year. According to the method, the volume shrinkage in the next year is predicted, so that the frequency of measurement by using a cavern sonar is reduced and the leakage risk due to sonar detection under pressure is lowered.

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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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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