鄂尔多斯盆地正宁—宜川地区长8油层组沉积相研究  

Sedimentary facies of Chang 8 oil unit in Zhengning-Yichuan area of Ordos Basin

作　　者：范萌萌[1] 李文厚[1] 孙栋[2] 何元方[1] 

机构地区：[1]西北大学,陕西西安710069 [2]中油长庆油田分公司,陕西西安710016

出　　处：《特种油气藏》2010年第3期52-55,共4页Special Oil & Gas Reservoirs

基　　金：国家重点基础研究发展计划"973计划"资助项目"多种能源矿产共存成藏(矿)机理与富集分布规律"(2003CB214602)

摘　　要：为了明确鄂尔多斯盆地东南部正宁—宜川地区延长组长8油层组的有利储集相带,落实成藏主控因素及资源潜力。以大量区域地质资料和前人研究成果为基础,运用沉积学原理和方法,利用钻井、测井等资料,结合邻区地层和沉积相研究成果,落实该油层组发育三角洲和湖泊2种沉积相,并以浅湖和三角洲前缘2种沉积亚相为主,沉积物源主要来自东北部和南部。根据沉积物源方向预测沉积相展布规律,对有利区判断及后续勘探开发工作具有一定的指导意义。This paper studies the favorable reservoir facies and the main control factors on hydrocarbon accumulation as well as resources potential of Chang 8 oil unit in Yanchang formation of Zhengning-Yichuan area in the southeast of Ordos Basin on the basis of a large amount of regional geological data and previous researches by using sedimentology method,drilling and logging data,and the research achievements of neighboring formations and sedimentary facies.It is determined that this oil unit had developed delta and lacustrine facies,comprising two main subfacies of shallow lake and delta front.The main sedimentary sources came from the northeast and the south.The distribution of sedimentary facies can be predicted according to sedimentary source direction.This study may guide the determination of favorable zone and future exploration and development.

关 键 词：延长组 沉积相 长8油层组 正宁-宜川地区 鄂尔多斯盆地 

分 类 号：TE121[石油与天然气工程—油气勘探]