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影响储层产能预测的因素很多,对储层产能预测大致可以分为动态定量预测和静态定性预测。在生产初期,利用储层品质指数对裸眼井进行静态定量预测并按砂岩结构和砂岩类型差异进行气层级别的判定,有利于工程师短时间内把握储层情况。本文以鄂尔多斯盆地子洲-清涧地区二叠系地层S23为例,进行岩石学特征、物性特征以及孔隙结构特征分析,得出储层含气量受孔隙类型、填隙物组分差异变化等因素影响,对该地区进行低产原因综合分析,用压汞实验数据得到品质指数与平均喉道半径和排驱压力之间的关系,运用测井解释成果资料和试气结果推导出适应该地区的储层品质指数和产量关系式,该方法具有快捷、简便、高效的特点,有助提高低产区域测井解释评价精度。
There are many factors that affect the prediction of reservoir productivity. The prediction of reservoir productivity can be divided into dynamic quantitative prediction and static qualitative prediction. In the early stage of production, using the reservoir quality index to predict the open-hole well quantitatively and judging the gas layer level according to the sandstone structure and sandstone type difference, it is good for the engineer to grasp the reservoir situation in a short time. Taking S23 of Permian strata in Zizhou-Qingjian area of Ordos Basin as an example, the petrologic characteristics, physical properties and pore structure characteristics are analyzed. The results show that the gas content of reservoirs is affected by pore type and the variation of interstitial components The author analyzed the causes of low yield in the area, obtained the relationship between the quality index and the average throat radius and displacement pressure by using the mercury intrusion test data, and derived the results of logging interpretation and test gas. Layer quality index and yield relationship, the method has the characteristics of quickness, simplicity and high efficiency, which helps to improve the logging interpretation and evaluation accuracy in low-yield areas.