库车前陆盆地超深层大油气田形成的地质认识

发布时间：2018-01-21 23:09

本文关键词： 库车前陆盆地超深层勘探天然气地质认识盐下断背斜圈闭　出处：《中国石油勘探》2016年01期 　论文类型：期刊论文

【摘要】：库车前陆盆地是近年来中国乃至全球超深层油气勘探的热点区域,在盐下6500m至8000m埋深的碎屑岩储层内发现了一批高产、稳产的大型天然气田。地质认识的进步至关重要,为超深层勘探指明了方向。(1)在顶蓬构造的减压作用下,盐下超深层仍发育规模有效储层,储层孔隙度达到3%~9%;构造强挤压应力在盐下断背斜内形成"应力中和面"效应,控制储层垂向分层特征,构造顶部发育高产储层。(2)前陆冲断带强烈挤压作用在盐下形成多排冲断带,断背斜圈闭规模发育,成排成带展布。(3)古近系—新近系巨厚膏盐岩盖层因构造挤压呈塑性流动加厚,叠置于断背斜圈闭之上,具有效封挡作用。库车前陆盆地超深层具有优越的石油地质条件及广阔的勘探前景,南部秋里塔格构造带有望成为超深层油气勘探接替领域。
[Abstract]:Kuche foreland basin is a hot regional and global China ultra deep oil and gas exploration in recent years, clastic reservoir in the salt 6500m to the depth of 8000m was found in a batch of high yield, large gas field stable. Critical geological understanding progress, and pointed out the direction. For ultra deep exploration (1) in vacuum effect of roof structure under ultra deep salt is still the effective reservoir development scale, reservoir porosity reached 3%~9%; stress in salt anticline formed in the tectonic stress and surface effect of strong extrusion, control of reservoir vertical stratification characteristics, structure developed at the top of high yield (2) foreland reservoir. Strong compressional thrust belt multi row thrust belt in salt, anticlinal traps scale development, row zone. (3) Paleogene Neogene thick gypsum salt cap rocks due to tectonic compression plastic flow was thickened, stacked on the anticlinal traps, with effective blocking effect Kuche. The foreland basin has an excellent petroleum geological condition and wide exploration prospect. The southern part of the Qiu Li tag structure is expected to become an ultra deep exploration area for oil and gas exploration.

【作者单位】：中国石油塔里木油田公司;
【分类号】：P618.13
【正文快照】： 位于塔里木盆地北缘的库车前陆盆地是中国西部重要的含油气盆地之一,经过多年勘探实践,取得了一系列重大发现,1998年在盆地中浅层4000m埋深的地层内发现了克拉2大气田,推动了国家西气东输工程的启动[1-3]。之后勘探家们在库车中浅层持续寻找类似克拉2这样的大型气田,但收效甚

【参考文献】