岩性油气藏 ›› 2015, Vol. 27 ›› Issue (1): 8994.doi: 10.3969/j.issn.1673-8926.2015.01.013
马 超
MA Chao
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。
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