陆相断陷湖盆陡坡断裂带沉积响应及充填过程——以东营断陷湖盆北部陡坡断裂带古近系为例  

Depositional response and filling process of the steep slope rift belt in the terrestrial fault basin: a case study of Paleogene in Dongying terrestrial fault basin

作　　者：谭先锋[1,2] 田景春[2] 白建平[1] 王艳碧[1] 邱桂强[3] 张守鹏[3] 

机构地区：[1]重庆科技学院石油工程学院,重庆401331 [2]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [3]胜利油田地质科学研究院,山东东营257015

出　　处：《中国地质》2010年第2期298-310,共13页Geology in China

基　　金：中石化重点科技攻关项目"济阳坳陷深层(沙四段-孔店组)构造演化与岩相古地理研究"及中石油创新基金(2008D-5006-07-02)资助

摘　　要：陆相断陷湖盆陡坡带同沉积断裂对沉积充填过程具有明显的控制作用。东营凹陷北部陡坡带在古近纪沉积期断裂活动明显,主要受两条主断裂带控制,陈南断裂控制盆地演化,胜北断裂控制沉积体系的发育;碎屑物质主要来源于陈家庄凸起、滨县凸起和青坨子凸起;受断裂构造背景及物源控制,北部陡坡断裂带主要由冲积扇、扇三角洲、近岸水下扇、三角洲、滑塌浊积扇等5种沉积类型充填;时间和空间上,陡坡断裂带具有冲积扇→近岸水下扇→扇三角洲→近源滑塌浊积扇→湖泊的典型时空演化和充填模式;陡坡断裂带砂砾岩体由于具有物性好、近油源、构造活动强烈等特点,是油气聚集的有利场所。Syndepositional rift obviously controls the deposition-filling process of the steep slope rift belt in the terrestrial fault basin. Two key rifts, I.e., Chenlan and Shengbei, are developed along the steep slope rift belt in Dongying terrestrial fault basin. The Chenlan rift controls the basin evolution, whereas the Shengbei rift controls the deposition. Clastic components in the steep slope rift belt chiefly came from Chenjiazhuang bulge, Binxian bulge and Qingtuozi bulge. Controlled by the tectonic setting and provenance, alluvial fan, fan-delta, nearshore subaqueous fan, delta and fluxoturbidite-fan were filled in the steep slope rift belt. There exists a typical temporal and spatial evolution in order of alluvial fan→mearshore subaqueous fan→fan→delta-fluxoturbidite→fan→lake. Having good physical properties and strong tectonic activities and being close to oil sources, the steep slope rift belt constitutes a favorable oil and gas accumulation place.

关 键 词：陡坡断裂带 沉积响应 沉积充填 构造-沉积演化 陆相断陷盆地 

分 类 号：P618.13[天文地球—矿床学]