东营凹陷北部斜坡带沙三—四段砂砾岩体与油气聚集  

Sandstone-conglomerate Bodies in Sha 3～4 Members and Hydrocarbon Accumulation in Northern Slope of Dongying Sag

作　　者：孙龙德[1] 

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《沉积学报》2003年第2期278-282,共5页Acta Sedimentologica Sinica

摘　　要：东营凹陷是渤海湾含油气区中最重要的含油气凹陷之一 ,其北部紧邻青坨子凸起、陈家庄凸起和滨县凸起为一狭长的陡坡带——北部斜坡带。它北靠盆地边缘凸起 ,南临盆地内生油洼陷。该斜坡带是在早第三纪早期 ,陈家庄凸起构造抬升过程中形成的 ,沙三—四时期 ,在坡角处沉积了很厚的碎屑沉积物 ,成为后来油气聚集的重要场所。研究结果表明 ,该地区沙三—四段沉积的层序地层格架包括三个层序 ,八个准层序组和十八个准层序 ;其中分布冲积扇 ,近岸水下扇和扇三角洲三种成因的砂砾岩体 ,后两者是主要的储油扇体 ;其油藏类型主要有背斜型、上倾尖灭、断块型、岩性透镜体及地层型五种。Dongying Sag is one of the most important petroleum sags in Bohai gulf petroleum province. Its northern part, immediately south to Qingtuozi, Chenjiazhuang and Binxian Uplifts is a long narrow abrupt slope named Northern Slope. This slope is located south to marginal uplift and north to generative basin/center. It is formed during the swelling of Chenjiazhuang Uplift in early Eogene. Clastic deposits of great thickness were accumulated at the slope foot during Sha 3～4 stage. From the study, the sequence stratigraphic framework of Sha 3～4 deposits in this area is composed of 3 sequence, 8 para-sequence groups and 18 para-sequences. There are 3 genetic types of sandstone-conglomerate bodies include alluvial fan, near bank subaquatic fan and fan delta. The later 2 genetic types are the major oil-bearing fans. Anticline, upward finger out, fault block, lithologic and stratigraphic traps are the 5 major trap types there.

关 键 词：渤海湾盆地 东营凹陷 砂砾岩体 油气聚集 碎屑沉积物 层序地层格架 油藏 

分 类 号：P618.13[天文地球—矿床学] P512.2[天文地球—地质学]