Method, device and server for determining adsorbed gas content of deep shale

Abstract

This specification provides a method, device and server for determining the content of adsorbed gas in deep shale. Based on this method, by combining the experimental test with the molecular dynamics model, the core samples in the target area are subjected to various temperature experimental tests under the first type of pressure environment with relatively low pressure, and the core samples in the first type of pressure environment are obtained. Then, the first shale molecular dynamics model of the core sample was constructed, and the shale gas adsorption data corresponding to various temperatures under the first type of pressure environment obtained before were used to carry out By fitting and adjusting, a second shale molecular dynamics model with higher accuracy is obtained; and then the second shale molecular dynamics model is used to obtain the core sample under the relatively high pressure and difficult to carry out experimental test through simulation simulation. The adsorption data of shale gas corresponding to various temperatures under the second type of pressure environment can be obtained, so that a more accurate and comprehensive adsorption characteristic curve of the whole pressure domain can be obtained.

Description

technical field [0001] This specification belongs to the technical field of reservoir development, and in particular relates to a method, device and server for determining the adsorbed gas content of deep shale. Background technique [0002] Shale gas is usually stored in dark shale or high carbonaceous shale in free and adsorbed forms. Among them, the adsorbed state (that is, adsorbed gas) is the main form of shale gas occurrence. Statistical research results show that adsorbed gas usually accounts for about 20%-85% of the total gas volume. Therefore, determining the adsorption and desorption characteristics of shale gas and other adsorption data is of great significance for analyzing and determining the occurrence characteristics of shale gas, evaluating shale gas resources, predicting and optimizing shale gas production capacity, etc. [0003] However, most deep shale gas is ultra-high pressure and high temperature gas reservoirs, for example, the highest pressure can r...

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Problems solved by technology

However, based on conventional experimental test conditions, it is often difficult to achieve the above-mentioned high-pressure environment for adsorption temperature testing. As a result, it is difficult to obtain more accurate deep shale gas adsorption data under high-pressure environment through experimental testing based on existing methods, and thus it is impossible to obtain more accurate data. , comprehensive shale gas adsorption data in the full pressure domain

[0004] For the above problems, no effective solution has been proposed

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