川西新场气田上三叠统须家河组二段致密砂岩优质储层控制因素  

Control factors of compacted high-quality sandstone reservoirs of member 2 of Xujiahe formation,upper Triassic in Xinchang gas field of Western Sichuan depression

作　　者：赵艳[1] 吴胜和[1] 徐樟有[1] 温立峰[1] 

机构地区：[1]中国石油大学地球科学学院,北京102249

出　　处：《中国石油大学学报（自然科学版）》2010年第4期1-6,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气集团公司石油科技中青年创新基金项目(07E1002)

摘　　要：依据岩石薄片分析,利用成岩作用定量分析及成岩演化等技术,对新场地区上三叠统须家河组须二段砂岩储层进行详细研究。结果表明:虽然须二段储层普遍具有低孔低渗的特征,但亦存在孔隙发育的优质储层段;优质储层主要发育在具有较高的成分成熟度和结构成熟度,粒度较粗,岩屑含量相对较低的砂岩中,在成岩过程中优质砂岩储层抗压实能力强;早期绿泥石与自生石英共同起到了抗压实的作用,保存较多的原生孔隙,提供了有利的渗流通道,有利于后期溶解作用形成大量次生孔隙。Based on the rock thin section analysis, the sandstone reservoirs of member 2 of Xujiahe formation, upper Triassic in Xinchang area were studied by using technologies of quantitative analysis of diagenesis and diagenetic evolution. The results show that the reservoirs have the characteristics of low porosity and low permeability in Xinchang area, but the highquality reservoirs with pore developed also exist. The high-quality reservoirs developed in sandstone with high maturity and structure maturity, coarse grain size and low debris content. During the process of diagenesis, the high-quality reservoirs have strong resistance to compaction. The combined effect of self-quartz and chlorite reached the role of compaction resist- ance, which preserves more primary pore and provides beneficial filtration path. The filtration path will advantage to form post^secondary dissolution pores.

关 键 词：新场气田 须家河组 优质储层 成岩作用 孔隙度 

分 类 号：TE122.2[石油与天然气工程—油气勘探]