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Method for calculating content of absorption gas occurred in shale gas reservoir

A technology of shale gas and adsorbed gas, which is applied in the field of natural gas exploration and development, can solve the problems of high cost and complicated method operation, and achieve the effect of low cost and easy operation

Active Publication Date: 2017-12-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Overcome the disadvantages of existing technologies and methods, which are complicated to operate and expensive

Method used

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  • Method for calculating content of absorption gas occurred in shale gas reservoir
  • Method for calculating content of absorption gas occurred in shale gas reservoir
  • Method for calculating content of absorption gas occurred in shale gas reservoir

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Embodiment 1

[0018] Embodiment 1: as figure 1 Said, a method for calculating the content of adsorbed gas stored in shale gas reservoirs, comprising the following steps;

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Abstract

The invention discloses a method for calculating the content of absorption gas occurred in a shale gas reservoir and belongs to the technical field of natural-gas exploration and development. The method can be used for calculating the content of the absorption gas occurred in the shale gas reservoir under all temperature and pressure conditions. The method comprises the steps: (1) carrying out TOC (Total Organic Carbon) and whole rock analysis, and isothermal adsorption experiment on more than 3 samples in same set of shale gas reservoirs; (2) according to the contents of the TOC, clay mineral, other minerals and results of the isothermal adsorption experiment in the samples of the shale gas reservoirs, establishing an evaluation model on the content of the absorption gas occurred in the TOC, the clay mineral and other minerals under all temperature and pressure conditions; (3) calculating the content of the absorption gas occurred in the TOC, the clay mineral and other minerals under all temperature and pressure conditions and establishing Langmuir isothermal adsorption model for the TOC, the clay mineral and other minerals; and (4) according to the contents of the TOC, the clay mineral and other minerals in the same set of shale gas reservoir, calculating the content of the absorption gas occurred in the shale gas reservoir under all temperature and pressure conditions.

Description

technical field [0001] The invention relates to a method for calculating the content of adsorbed gas stored in shale gas reservoirs, and belongs to the technical field of natural gas exploration and development. Background technique [0002] Shale gas is the accumulation of natural gas that mainly occurs in the formation of mudstone and shale with hydrocarbon generation ability in the state of adsorption and free. Adsorbed gas is one of the main occurrence modes of shale gas in shale gas reservoirs. At present, geological researchers at home and abroad believe that the content of adsorbed gas in shale gas reservoirs accounts for at least 40% of the total gas content of shale gas, and the content of adsorbed gas plays a decisive role in the contribution of shale gas resources. The development of shale gas reduces the pore fluid pressure and desorbs the adsorbed shale gas into a free state, which plays an important role in alleviating the rapid drop in shale gas reservoir pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 丁雪陈方文
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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