摘要
在岩心观察基础上,识别出W油田涠三段和涠四段15种岩石相,结合测井、录井和分析化验等资料,对该区沉积相类型、平面展布特征及其演化规律进行了系统的研究。研究表明,涠三段和涠四段发育一套辫状三角洲一湖相沉积体系,识别出三角洲平原、三角洲前缘、前三角洲3种亚相以及辫状河道、河道间、水下分流河道、分流间、席状砂、远砂坝、湖泥等7种微相;其中辫状河道和水下分流河道微相在涠三段沉积时期较发育,是该地区砂体的主要聚集带。该区沉积相研究为该区下一步油气勘探与开发奠定了基础。
Based on analysis of core survey,fifteen lithofacies in members of Wei 3 and Wei 4 of W Oilfield are identified. In combination with comprehensive study on well logging and analysis,the types of sedimentary facies,as well as their distribution and evolution in the area are studied systematically.The research shows that the Member Wei 3 and Wei 4 are a depositional system of braided river-lake fades.Three sub-facies(braided delta plain,braided delta front and pre-delta),seven sedimentary micro-facies(braided river channel,interchannel,underwater distributary channel,distributary interchannel,sheet sand,distal bar and lake clay) are identified.The braided river channel and underwater distributary channel are widely developed in Member Wei 3,which mainly form sand body in the area.Sedimentary facies in the area is the foundation for further petroleum exploration and development.
出处
《长江大学学报（自科版）（上旬）》
CAS
2012年第5期53-56,6,共4页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
关键词
W油田
涠三段
涠四段
岩石相
沉积相
W Oilfield
member Wei 3
member Wei 4
lithofacies
sedimentary facies
