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为了准确对致密砂岩气储层参数有更加全面透彻的认识,采用非常规天然气的气含量解吸法和等温吸附试验对致密砂岩气储层参数进行测试分析,测得鄂尔多斯盆地东北部致密砂岩气井气含量参数值与等温吸附常数。同时,研究了砂岩气储层特征和砂岩气含量试验测试技术方法。结果表明:鄂尔多斯东北部致密砂岩气井所采平均气含量为9.94 cm3/g;根据致密砂岩气储层的等温吸附常数与储层压力得出砂岩含气饱和度为57.8%,临界解吸压力为7.26 MPa.作为现阶段测试砂岩气参数指标的主要手段和方法,砂岩气储层气含量实验测试和等温吸附特征得出的砂岩气参数为勘探区砂岩气资源评价提供了比较基础数据,对砂岩气勘探开发有重要的指导意义。
In order to accurately and fully understand the parameters of tight sandstone gas reservoirs, the unconventional gas desorption and isothermal adsorption tests were used to test and analyze the parameters of tight sandstone gas reservoirs. The gas sand gas of tight sandstone in northeastern Ordos Basin was measured Content parameter values and isothermal adsorption constants. At the same time, the sandstone gas reservoir characteristics and sandstone gas content of the test and test methods. The results show that the average gas content of tight sandstone gas wells in northeastern Ordos is 9.94 cm3 / g. Based on the isothermal adsorption constants and reservoir pressures of tight sandstone gas reservoirs, the gas saturation of sandstone is 57.8% and the critical desorption pressure is 7.26 MPa. As the main measure and method for testing sandstone gas parameters at the present stage, the sandstone gas parameters obtained from sandstone gas reservoir gas test and isothermal adsorption characteristics provide comparative basic data for the evaluation of sandstone gas resources in the exploration area, Exploration and development have important guiding significance.