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岩电参数是分析储层物性和计算储层饱和度的重要参数,其数值与岩石孔隙结构及内部两相流体的分布密切相关,且随温度和压力的变化而变化.而在高温高压或孔隙流体中含有二氧化碳的条件下,岩电参数的变化与一般规律的符合程度依旧存疑.针对上述问题,通过测量与统计二氧化碳、甲烷等流体的密度、纵波速度和电阻率等参数的变化,研究并讨论了溶解二氧化碳对地层水导电性的影响,分析了不同温度、压强及二氧化碳含量条件下岩电参数的变化规律,为含二氧化碳气藏含气饱和度的计算及二氧化碳定性识别和定量评价提供了新的思路.
Rock electrical parameters are important parameters for analyzing reservoir physical properties and calculating reservoir saturation, and their values are closely related to the distribution of rock pore structure and internal two-phase fluid, and vary with temperature and pressure, while at high temperature and pressure or porosity Under the condition of containing carbon dioxide in the fluid, the consistency between the change of rock electrical parameters and the general law is still in doubt.Aiming at the above problems, by measuring and counting the density, longitudinal wave velocity and resistivity of carbon dioxide, methane and other fluids, The influence of dissolved carbon dioxide on the conductivity of formation water was discussed. The variation law of rock electrical parameters under different temperature, pressure and carbon dioxide content was analyzed. The calculation of gas saturation of carbon dioxide gas reservoir and the qualitative identification and quantitative evaluation of carbon dioxide New ideas.