冀中肃宁–大王庄地区中深层储层特征及控制因素

Reservoir Feature of the Middle-Deep Strata in Suning-Dawangzhuang District of Jizhong and Its Influencing Factors

摘要: 以对取芯井段的观测为基础，结合沉积微相及岩石薄片、铸体薄片、压汞数据等储层物性资料的对比分析，对肃宁–大王庄地区中深层砂岩储层的储层特征及储层控制因素作了较为详细的研究。研究表明饶阳凹陷肃宁–大王庄地区中深层储层以粉砂岩和细砂岩沉积为主，整体粒度较细，颗粒分选中–好，磨圆以次圆状为主。砂岩成分主要是长石类砂岩。储层物性较差，属于中低孔–中低渗储层。储层储集空间以长石及易溶岩屑受到溶蚀作用形成的次生孔隙为主，其次为原生孔隙。储集空间的发育主要受沉积作用、成岩作用、地层压力的影响。结果表明，位于水下分流河道弱压实、强溶蚀的砂岩是良好的储层。

Abstract: The reservoir physical characteristic and its influencing factors are studied in detail based on the core observation and the analysis of sedimentary microfacies and reservoir properties such as thin section, casting thin sections, mercury intrusion data etc. The research shows that the rock types of Suning-Dawangzhuang district of Jizhong are mainly siltstone and fine sandstone, which are characterized by fine grain size, medium-good sorting and sub-rounded. The ingredient of sandstone is mainly arcose. The reservoir physical characteristic is poor, middle-low porosity and middle-low permeability. The main pore type is secondary pore which is formed by the dissolution of feldspar and debris, the second is primary porosity. Reservoir space is influenced mainly by sedimentary process, diagenesis, and formation pressure. The research shows that the sandstone of highly dissolution and weak compaction in the middle of river has good reservoir properties.