基于常规测井的储层孔隙结构评价新方法

目前，复杂储层孔隙结构评价主要是依靠岩心实验分析和测井新技术，而基于常规测井资料的复杂储层孔隙结构评价仍是难点。以压汞毛管压力曲线实验数据为基础，实际分析了不同压力下进汞饱和度与储层物性参数之间的关系，进汞饱和度与储层孔隙度、渗透率之间存在较好的关系，并且不同孔隙类型储层之间关系差异明显。在此认识的基础之上，采用流动带指数法将区域储层划分为4类，分别建立了不同类型储层的伪毛管压力曲线预测模型，根据毛管压力曲线衍生得到了注汞效率以及平均毛管半径可以较好地连续评价复杂储层孔隙结构特征，为复杂储层开发方案的制定与实施奠定了坚实基础。

A New Method of Reservoir Pore Structure Evaluation Based on Conventional Logging Data

Up to now, pore structure evaluation of complex reservoirs mainly depends on the core experiment analysis and new logging techniques, it is still difficult to evaluate the pore structure of complex reservoirs based on conventional logging data. Based on the experimental data of mercury capillary pressure curve, the relationship between mercury saturation and reservoir property parameters has been analyzed under different pressure. The result showed that there was a good relationship between them and the relationship showed obvious difference among different pore type reservoirs. Based on this knowledge and the method of flow zone index, the reservoirs were divided into four types. And the prediction model of pseudo-capillary pressure curve of different type reservoirs was established. The pore structure characteristics of complex reservoirs could be well evaluated according to the efficiency of mercury injection and the average capillary radius which were derived from the capillary pressure curve. All this has laid a solid foundation for the formulation and implementation of development plans for complex reservoirs.