Geological carbon dioxide storage evaluating method

Abstract

The invention relates to a geological carbon dioxide storage evaluating method. The geological carbon dioxide storage evaluating method comprises the following steps: S1, selecting a core sample, anddetermining the characteristics of the core sample; S2, pretreating the sample: cutting the core sample, and polishing the surface of the cut core sample; S3, performing an indoor water-rock simulation experiment on the core sample; S4, treating the core sample after the experiment to remove a solution after an experimental reaction; S5, analyzing and testing the core sample treated after the experiment; S6, carrying out a long-term numerical simulation experiment. According to the geological carbon dioxide storage evaluating method, the reaction path and the reaction process after an oil andgas reservoir is filled with CO2 are determined through the short-term indoor water-rock simulation experiment, and on this basis, storage quantity evaluation is performed through long-term numericalsimulation, so that a CO2 filling simulation process is closer to an actual large-scale carbon dioxide filling experiment, uncertainty of the storage quantity evaluation caused by speculation of the storage process after CO2 filling according to a typical chemical reaction equation is avoided, and the accuracy of the storage potential evaluation of an actual storage geological body is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of geochemistry, and relates to an evaluation technology for geological sequestration of carbon dioxide, in particular to an evaluation method for geological sequestration of carbon dioxide in oil and gas reservoirs. Background technique [0002] With the sharp increase of human industrial activities, a large amount of CO 2 When discharged into nature, the concentration of carbon dioxide in the atmosphere continues to increase, and the greenhouse effect continues to accumulate, leading to global warming, causing natural ecosystem disasters such as melting glaciers and permafrost, and rising sea levels, which seriously threaten human survival. CO 2 The capture and storage of carbon dioxide has become one of the most potential technical methods to control carbon dioxide emissions. A large amount of domestic and foreign CO 2 The geological storage project proved its technical feasibility. CO 2 The capture a...

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Problems solved by technology

[0007] The present invention aims at the above-mentioned problems in the prior art, such as the poor accuracy of the estimated value of the mineral storage capacity and the low reliability of the evaluation result, and provides a carbon dioxide geological storage evaluation method with high accuracy and high evaluation result reliability

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