CO2 phase change fracturing effect evaluation method based on coal bed gas adsorbability

The invention discloses a CO2 phase change fracturing effect evaluation method based on coal bed gas adsorbability, relates to the technical field of coal bed gas exploration and development, and aims at the coal bed gas extraction condition of a CO2 phase change fracturing coal mine area, the CO2 phase change fracturing effect condition is evaluated by using two parameters of a critical reservoir ratio alpha and coal bed gas saturation beta. The CO2 phase change fracturing technology and the coal seam methane adsorption constant are effectively combined, the novel CO2 phase change fracturing effect evaluation method based on the coal seam gas adsorbability is provided, and the CO2 phase change fracturing effect can be effectively evaluated. The method can be used for evaluating the CO2 phase change fracturing effect of the coal bed gas in different coal mine areas. 本发明公开了一种基于煤层气吸附性的CO2相变致裂效果评价方法，涉及煤层气勘探开发技术领域，针对CO2相变致裂煤矿区煤层气抽采情况，利用临储比α与煤层气饱和度β两个参数评价CO2相变致裂效果情况，本发明有效结合CO2相变致裂技术与煤层甲烷吸附常数，提出了新的基于煤层气吸附性的CO2相变致裂效