河南省濮阳地区古近系沙河街组盐岩层与油气藏的关系  

Relationship between salt beds and oil and gas reservoir of the Shahejie Formation of Paleogene in Puyang area, Henan Province

作　　者：谷维成[1] 赵其磊[1] 吕迎红[1] 莫文丽[2] 郑军林[3] 舒彬[4] 

机构地区：[1]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001 [2]中国石化中原石油勘探局钻井工程技术研究院,河南濮阳457001 [3]中国石化中原油田分公司采油六厂,山东东明274511 [4]中国石化中原油田分公司采油二厂,河南范县457532

出　　处：《古地理学报》2005年第4期529-534,共6页Journal of Palaeogeography：Chinese Edition

摘　　要：河南省濮阳地区古近系沙河街组发育4套盐岩层，每一套盐岩层又由若干个盐岩韵律组成，盐岩韵律由盐岩(或膏岩)和泥岩构成。本文重点研究沙三段的3套盐岩层。盐岩层极其致密，其阻隔作用使下伏地层的温度和压力升高，有利于下伏生油岩中的有机质向油气转化；同时，在高温、高压下盐岩呈塑性状态，使其成为良好的盖层。盐岩与砂泥岩相变，加之与构造配合形成一定规模的与盐岩层有关的油气藏，扩大了油气勘探的领域。与盐岩层分布有关的油气藏有4种类型：砂体上倾尖灭油气藏、岩性-断层油气藏、断层-岩性油气藏、断层-背斜油气藏。确定3套盐岩层在研究区的分布特征及其与油气运聚的关系，对于寻找隐蔽油气藏及下步滚动勘探开发具有十分重要的意义。There are four sets of salt beds in the Shahejie Formation of Paleogene in the central uplift belt and its vicinity in northern Dongpu Depression. Each set of salt beds consists of numerous salt rock rhythms that are composed of salt rock and mudstone. Three sets of salt beds in the Member 3 of Shahejie Formation are investigated in this paper. Thicknesses of different and same rhythmic units are very different in various regions. Salt beds have three major structures： primary tabular salt bed, secondary salt bed wall and post deforming salt bed. Because salt beds are very dense with excellent sealing, the pressure and temperature of the underlying strata are so high that organic materials under source rocks turn into oil and gas easily. Salt beds under high pressure and temperature are plastic and therefore are high-quality caprocks. Phase change from salt rock to sandstone and mudstone together with structural movement formed lithologic reservoirs relative to salt beds. There are four kinds of oil reservoir traps in relation to salt bed distribution： sandstone pinch-out reservoir, lithologic-fault reservoir, fault-lithologic reservoir and fault-anticline reservoir.This paper discussed the distribution of three sets of salt beds and their relation to oil and gas accumulation in the Member 3 of Shahejie Formation of Paleogene in Puyang area, Henan Province. It is important for the exploration of subtle oil and gas accumulation futhermore in this region.

关 键 词：古近系 沙河街组 沉积相 盐岩层 油气藏 濮阳地区 河南省 

分 类 号：P618.130.2[天文地球—矿床学] TE346[天文地球—地质学]