Acceleration test method for dynamic corrosion of rock by supercritical carbon dioxide

Abstract

The invention relates to an accelerated test method for dynamic corrosion of rocks by supercritical carbon dioxide, and belongs to the technical field of rock mechanical tests. The method comprises the following steps: providing a high-pressure condition (0-40MPa) by using a carbon dioxide high-pressure plunger pump, providing a high-temperature condition (0-400 DEG C) by using a heating system, carrying out an accelerated test by using the provided high-temperature condition, and providing a fluid flowing condition by using a stirring device; simulating a reservoir environment in a high-temperature and high-pressure reaction kettle, so that a test method foundation is laid for a rock acidification test, and a long-term dynamic corrosion action mechanism of supercritical carbon dioxide on rock is disclosed. The test adopts an acceleration test method, so that the effect of shortening the test time is achieved, the repeatability of the test is enhanced, the test has enough repeated observation times, and the occasionality caused by carrying out the test for equal time is avoided.

Description

technical field [0001] The invention relates to an accelerated test method for dynamic dissolution of rock by supercritical carbon dioxide, belonging to the technical field of rock mechanics tests. Background technique [0002] Fossil energy, as the main body of China's energy consumption structure, while promoting rapid economic development, has also caused great damage to the natural environment, which directly leads to the sharpening of the contradiction between my country's economic development and environmental protection. Therefore, looking for alternatives to fossil energy Renewable clean energy has become an important task for social and economic development. Among the many new renewable energy sources, geothermal energy is widely distributed, with huge reserves and continuous and stable energy supply, so it has broad development prospects and potential. According to the origin and storage conditions of geothermal energy, it can be divided into hydrothermal geotherma...

AI Technical Summary

Problems solved by technology

However, due to certain technical difficulties in increasing the upper temperature limit of the stirred reactor, the study of the dynamic dissolution mechanism of supercritical carbon dioxide on rocks lacks necessary equipment and test methods, resulting in the lack of necessary, sufficient and reliable test research data. The theory is not perfect and has no guiding significance for field tests

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