摘要
根据延长统三角洲的沉积背景,通过15口取心井岩石相及其组合的分析,在长3段4+5油组和6油组共识别出水下分流河道、水下天然堤、水下决口扇及河口坝等7种沉积微相。查明了各种沉积微相的发育和平面展布规律,发现研究区主要发育水下分流河道砂体,砂体分布范围大,而河口坝砂体仅出现于研究区南部,并且分布范围局限。
Based on deltaic sedimentary background in Yanchang Formation, 7 sedimentary microfa- cies, such as subsea distributary channel, subsea natural barrier,subsea crevass-splay and mouth bar etc. are recognized in 4 + 5 and 6 oil formation of Zone Chang 3 by analyzing rock facies and its assemblage of 15 coring wells. The rules of various sedimentary microfacies development and plane distribution are clarified, it is found out that the distributary channel sandbodies are mainly developed in the studied area, of which the distributional extent is wide, while the mouth bar sandbodies only appear in the south of the area, and its distributional extent is limited.
出处
《江汉石油学院学报》
CSCD
北大核心
2004年第3期32-34,共3页
Journal of Jianghan Petroleum Institute
基金
石油科技中青年创新基金项目(2002F70102)。
关键词
沉积微相
油组
延长统
安塞油田
sedimentary microfacies
oil formation
Yanchang Formation
Ansai Oilfield
