东濮凹陷地质三分性与沙三期沉积古地理  

Geological Threefold Division and Sedimentary Palaeogeography in Es_3 Period in Dongpu Depression

作　　者：李明娟[1] 许化政[1] 周新科[1] 

机构地区：[1]中石化石油勘探开发研究院,北京100083

出　　处：《断块油气田》2006年第5期4-7,共4页Fault-Block Oil & Gas Field

摘　　要：东濮凹陷构造与沉积明显分为2个阶段:沙三段沉积时期和沙二段—东营组沉积时期。沙三段时期,东濮地区发育濮阳湖和东明湖。濮阳湖受兰聊、五星集-六塔断层活动控制,形成深水湖相—浅水盐湖相的暗色泥岩与盐岩、砂岩韵律,是现今油气最丰富的领域,盆内二级断层———杜寨断层、石家集-马寨断层、濮西断层的相继发育控制沉积中心的分布;东明湖是受兰聊断层活动控制的箕状凹陷,因补偿速度快,仅形成浅—半深水的砂泥岩韵律,生油岩发育质量差,现今的西洼南部地区是上述两湖泊的边缘,基本无生油岩发育。沙二段—东营组时期,长垣、黄河、文东、文西等断层强烈活动,形成两洼一隆一斜坡的构造格局,彻底改变了沙三期的沉积古地理,形成多个洼陷和多个沉积中心。Tectonics and sedimentary were divided clearly two periods which were Es_3 and Es_2-Ed.In Es_3 period.Puyang lake and Dongming lake were growing in Dongpu area.The Puyang lake was controlled by Lanlao fault activity and Wuxingji-Liuta fault activity,and then dark mudstone and rhythm of salt rock and sandstone of deep lake facies and shallow salt-lake facies were formed.Dark mudstone and rhythm of salt rock and sandstone are the richest oil and gas areas now.The distribution of sedimentary centers was controlled by secondary faults~,growing,such as Duzhai fault,Shijiaji-Mazhai fault and Puxi fault in Dongpu depression.Dongming lake was a half depression which was controlled by Lanlao fault activity.The shallow-half deep water~,rhythm of mudstone and sandstone were formed because of fast compensating velocity,and the growing quality of oil source-rock was poor.There was no oil source-rock in Xiwa south area which was located above two lakes~,boundary.In Es_2-Ed period,structural pattern of two sags-one uplift-one slope was formed because of strong fault activity such as Changhong fault,Huanghe fault,Wendong fault,Wenxi fault,etc.Sedimentary palaeogeography was changed completely.Many sags and many sedimentary centers were formed.

关 键 词：东濮凹陷 沙三段 濮阳湖 东明湖 古地理 

分 类 号：TE122.1[石油与天然气工程—油气勘探]