Shale gas content calculation method

Abstract

The invention provides a shale gas content calculation method, belonging to the field of shale exploration and development. The method comprises the steps of collecting experimental data; and then inputting the collected experimental data into a shale gas content calculation model to obtain the shale gas content under a reservoir condition, or inputting the collected experimental data into the shale gas content calculation model to obtain a curve of pressure and the shale gas content and then acquiring the shale gas content under the reservoir condition from the curve. According to the method,the shale gas content can be rapidly obtained; the process is simple and convenient; used basic data are easy to obtain; the time and financial cost for acquiring the shale gas content can be obviously reduced; meanwhile, gas content calculation precision can be improved; and the application range of the method is wide.

Description

technical field [0001] The invention belongs to the field of shale exploration and development, and in particular relates to a method for calculating the gas content of shale. Background technique [0002] At present, the gas content of shale is generally obtained by on-site pressure-holding coring test, which requires the use of on-site desorption data to inversely calculate the gas content of shale under reservoir conditions, but some gas content will be lost before the core is put into the desorption device , many factors such as coring methods, measurement methods, and estimation methods will affect the size and law of gas loss, and there is no accurate method to calculate this part of gas loss; in addition, the time and financial costs of field testing methods are high, and it is impossible to quickly Obtain the gas content of a larger number of rock samples. Well logging and nuclear magnetic resonance methods often use the data obtained by the desorption method to cor...

AI Technical Summary

Problems solved by technology

[0016] To sum up, the existing methods cannot quickly and accurately obtain the gas content of a large number of rock samples. Therefore, it is necessary to establish a new method for calculating shale gas content that is faster, more accurate, and more widely used.

Images