莱州湾凹陷东部走滑带盐相关构造特征  

Characteristics of Salt-related Structures in the Eastern Strike-Slip Zone of Laizhou Bay Sag

作　　者：孙和风[1,2] 周心怀[2] 彭文绪[2] 王德英[2] 彭刚[2] 

机构地区：[1]中国石油大学资源与信息学院,北京102249 [2]中国海洋石油有限公司天津分公司勘探开发研究院,天津300452

出　　处：《地球科学与环境学报》2008年第4期380-384,共5页Journal of Earth Sciences and Environment

摘　　要：通过对盐相关构造变形样式的探讨,证明莱州湾凹陷东部走滑带盐相关构造的形成受到走滑作用和重力流动作用控制,以盐层沿层流动为主要特征,由南至北,盐层逐渐由过成熟底辟向盐枕过渡。莱州湾凹陷东部走滑带盐上构造有盐上断裂背斜、盐撤凹陷、龟背构造、翼部地层超覆和盐体遮挡构造;盐层构造有枕状底辟、盐株和外来盐席;推测盐下构造有早期古隆起。盐相关构造经历了发育—调整—成熟—再活动4个主要阶段。盐上构造圈闭控制了莱州湾凹陷东部走滑带的油气聚集。It has been proved that the formation of salt-related structure in the eastern Laizhou bay sag was controlled by strlke-slipping and gravitational gliding, according to the drilling data and seismic profiles. The over-mature diapirs gradually transited to salt pillow from south to north in the strike-slip zone. The suprasalt structures include., salt anticlines, salt-collapse basin, turtleback structures, stratigraphic overlaps and screened structures. The main salt bed structures are pillow-like salt diapirs, salt plugs and alloehthonous salt sheets. The subsalt structures may be related to basement uplift. The salt-related structures experienced four stages which are generation, adjustment, maturation and reactivation. It has been found that the petroleum accumulation of strikeslip zone was controlled by salt-related traps in the eastern Laizhou bay sag.

关 键 词：莱州湾凹陷 郯庐走滑断裂带 盐相关构造 油气成藏 

分 类 号：P618.130.2[天文地球—矿床学] TE122.3[天文地球—地质学]