摘要
分析盐构造活动的演化过程对于了解含盐盆地的油气成藏有着重要的意义,是当前国际构造研究和油气勘探的热点问题之一。本文旨在通过对滨里海盆地S区块内盐间地层中的构造行迹进行分析来了解S区块盐构造演化过程及其对油气成藏的影响。在滨里海盆地S区块二维地震测线构造分析的基础上,可以将盐间地层划分为与盐丘呈整合接触的扇形生长地层和不整合接触的水平刺穿地层。分析结果表明水平刺穿地层形成于早期刺穿的盐丘附近,时代为晚二叠-早三叠;扇形生长地层形成于后期非刺穿的盐丘附近,时代为早三叠-晚三叠。整合接触型盐丘和不整合接触型盐丘在古构造高度上存在着差异导致了它们在油气成藏能力上的差别。
Research on salt structures has important meaning to the exploration of oil and gas in the salt-bearing basin,it becomes one of the hottest topics of tectonic research and exploration for oil and gas.The major idea of this article is to discuss the evolution of salt structures and their control on oil and gas reservoirs in S block of Pre-Caspian basin,by way of analyzing the structural features in inter-salt strata.Based on the investigation of 2-D seismic profile of S block,the inter-salt strata can be divided into 2types：limb rotation growth strata and lateral pierced strata.The lateral pieced strata were formed around pierced salt dome during the P2-T1period;the limb rotation growth strata were formed around unpierced salt dome during the T1-T3period.Differences between these two types of inter-salt strata indicate their different paleostructural altitude,therefore the strata around the unpierced salt dome have more hydrocarbon accumulation potential than those around the pierced salt dome.
出处
《中国矿业》
北大核心
2014年第7期74-78,共5页
China Mining Magazine
关键词
滨里海盆地
盐构造演化
盐间地层
油气成藏
Pre-Caspian basin
salt structure evolution
inter-salt strata
hydrocarbon accumulation
