For the high pressure phase equilibrium system composed of CO2, H2O, CaCl2, etc., CO2 is treated as Super Critical Fluid truly, the volume of which is estimated by BWR state equation suitable for super critical fluid.

• 考虑了酸液溶蚀的碳酸盐以及酸岩反应生成的二氧化碳对人工裂缝体积的影响，针对裂缝内由二氧化碳、水、氯化钙等物质组成的高压相平衡体系，将二氧化碳真实地处理为超临界状态，其体积由适用于超临界流体的BWR状态方程求解。