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Method for determining lost gas content in gas content of shale

A shale gas content and determination method technology, which is applied in the field of energy and chemical industry, can solve the problems of insufficient accuracy of shale gas content, and achieve the effect of accurate and high accuracy of lost gas gas content

Inactive Publication Date: 2015-12-30
INST OF GEOMECHANICS
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Problems solved by technology

[0007] At present, there are many methods for measuring shale gas content in foreign countries, mainly including: US Federal Bureau of Minerals direct method (USBM direct method), improved direct method, Smith-Williams method and curve fitting method, etc., but the shale gas content obtained by these methods Insufficient accuracy of gas content, usually only corresponds to the lower limit of actual shale gas content

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  • Method for determining lost gas content in gas content of shale
  • Method for determining lost gas content in gas content of shale

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Embodiment Construction

[0071] figure 1 It is a flowchart of a method for determining the lost gas content in shale gas content of the present invention. combine figure 1 Shown, the determination method of loss gas content in the shale gas content of the present invention comprises:

[0072] Step 101: Collect core samples from shale gas wells and bring them to the ground and load them into an analysis device.

[0073] The analysis device includes a constant temperature water bath box, a desorption tank, a data acquisition device, a data analysis device, and a gas volume measuring instrument.

[0074] The core sample is loaded into the desorption tank in the desorption unit. The data acquisition device includes an air temperature sensor and an air pressure sensor, etc., for collecting air temperature data and air pressure data, etc. respectively. The data analysis device is used to complete the work of data statistics and result analysis. The data analysis device can reflect some data in the curr...

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Abstract

The invention provides a method for determining lost gas content in gas content of shale. The method comprises steps as follows: core samples are acquired from a shale gas underground site, lifted to the ground and placed into an analyzer, multiple parameters are acquired, the zero time, the lost time correction and the core sample weight are calculated before desorption of the core samples, the core samples are desorbed in the analyzer, data acquired during desorption are processed, the square root of acquired desorption time is used as a horizontal ordinate, the acquired desorbed gas content is used as a vertical coordinate, a fitted curve of the desorbed gas content is drawn, and the intercept value of the vertical coordinate of the fitted curve is the lost gas content.

Description

technical field [0001] The invention relates to the field of energy and chemical industry, in particular to a method for determining the lost gas content in shale gas content. Background technique [0002] With the development of petroleum energy and its non-renewability in the past hundred years, petroleum resources are facing an increasingly scarce dilemma. Countries strive to develop various new resources, such as solar energy, wind energy, nuclear energy, and more. [0003] Shale gas is a kind of natural gas resource that can be exploited in shale formations, and it has been recognized by people for a long time. Shale gas occurs in organic-rich mud shale and its interlayers. It is an unconventional natural gas that mainly exists in adsorption and free states. The main component is methane. It belongs to the same category as "coalbed methane" and "tight gas". The formation and enrichment of shale gas has its own unique characteristics, and it is often distributed in thi...

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Application Information

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IPC IPC(8): G01N7/14
Inventor 刘成林李宗星代昆杨元元彭博曹军张旭王志高袁嘉音
Owner INST OF GEOMECHANICS
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