岩性油气藏 ›› 2017, Vol. 29 ›› Issue (2): 117124.doi: 10.3969/j.issn.1673-8926.2017.02.014
刘曦翔1,2, 张哨楠1,2, 杨鹏3, 张咏梅1, 何昊4
LIU Xixiang1,2, ZHANG Shaonan1,2, YANG Peng3, ZHANG Yongmei1, HE Hao4
摘要: 近年来,在长岭断陷龙凤山地区埋藏深度大于3 000 m的营城组地层中,已有多口钻井获得工业油气流,显示出良好的油气勘探潜力,但其优质储层的形成机理与控制因素均不明确,制约了进一步的油气勘探和开发。综合利用岩心观察、铸体薄片分析、CT 扫描、物性测试及恒速压汞等方法,对龙凤山地区优质储层的形成机理与控制因素进行了分析。结果表明:营城组储层物性主要受成岩作用的控制,根据胶结物的特征可划分出压实致密砂岩、绿泥石胶结砂岩和浊沸石胶结砂岩3 种类型砂岩;在淡水充注和湖水作用的控制下,储层胶结作用和溶蚀作用均具有明显的分带性,并据此建立了不同砂岩的发育模式。中成岩期浊沸石胶结砂岩受到有机酸的溶蚀,在扇三角洲外前缘形成优质储层分布区,有利于油气的聚集成藏,可作为下一步勘探开发的“甜点”区域。
中图分类号:
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