定北地区下石盒子组盒1段致密砂岩储层特征及影响因素  

Tight sandstone reservoir characteristics and influencing factors of He-1 member of the Lower Shihezi Formation in Dingbei area

作　　者：马超[1] 

机构地区：[1]中国石化股份公司华北分公司勘探开发研究院,郑州450006

出　　处：《岩性油气藏》2015年第1期89-94,共6页Lithologic Reservoirs

基　　金：国家重大科技专项下属课题"碎屑岩层系大中型油气田富集规律与勘探关键技术"(编号:2011ZX05002-001)资助

摘　　要：定北地区盒1段是该区上古生界的主力产层,属于典型的致密砂岩储层,但对其储层特征及影响因素的研究较少,严重制约了气藏的评价和优选。从储层岩石学特征入手,利用岩石薄片、铸体薄片和孔渗分析等资料,对盒1段致密砂岩储层特征及影响因素进行了研究。结果表明,盒1段致密砂岩储层的孔隙类型以粒间溶孔和残余粒间孔为主;三角洲平原分流河道主河道是有利储层的发育区;压实和压溶作用及胶结作用是导致储层致密和原生粒间孔大幅减少的主要因素,而溶蚀作用产生的粒间溶孔改善了储层物性。该研究成果为盒1段致密砂岩储层的评价和勘探选区提供了依据和方法。He-1 member in Dingbei area is the main producing formation and belongs to typical tight sandstone reservoir, but the study of reservoir characteristics and influencing factors is less, which severely restricts gas reservoir evaluation and optimization. Based on tile data of rock thin sections, casting thin sections, porosity and permeability analysis, this paper studied tight sandstone reservoir characteristics and its influencing factors of He-l member from the reservoir petrology characteristic. The results show that pore types of the tight sandstone reservoir of He-1 member are mainly intergranular dissolved pores and residual intergranular pores. Delta plain distributary channel sand body is favorable reservoir development area. Compaction, pressure solution and cementation are the main factors leading to the reservoir densification and the significant reduction in primary intergranular pores. The reservoir properties are improved due to intergranular dissolved pores produced by dissolution. This study provides basis and methodology for tight sandstone reservoir evaluation and exploration.

关 键 词：致密砂岩 储层特征 沉积作用 盒1段 定北地区 

分 类 号：TE122.23[石油与天然气工程—油气勘探]