摘要
孤岛油田西区北馆陶组属坳陷盆地背景下曲流河沉积,按T-R旋回划分的标准西区北馆上段3—6砂层组可划分为3个层序:GS1、GS2和GS3,7个副层序组,其中GS1仅发育R旋回,GS2发育一个完整的T-R旋回,GS3仅发育T旋回。在岩心观察、粒度分析及测井资料识别的基础上,将孤岛油田西区北沉积相定为曲流河,这有别于前人认为的辫状河沉积。研究区沉积相模式与经典的曲流河沉积模式极为相似。
The Guantao Formation in the north of the western area of Gudao Oilfield is deposited in the meandering stream under the depression environment. According to stratigraphic sequences dividing standard of Vail,the Ng3-6 sands in study area can be divided into three sequences, GS1,GS2 and GS3, and 7 subsequences. GS1 only presented R cycle, GS2 presented an integrated T-R cycle and GS3 only presented T cycle. On the basis of uhe core observation and the grain size analysis and the log data identifying, the sedimentary facies in study area is meandering stream, and this is different from traditional ideal, braided stream. The sedimentary model in study area is similar with classical meandering stream.
出处
《断块油气田》
CAS
2006年第2期23-25,共3页
Fault-Block Oil & Gas Field
关键词
孤岛油田西区北
坳陷盆地
曲流河
辫状河
边滩微相
North of the western area in Gudao oilfield, Depression basin, Meandering stream, Braided stream, Point bar microfacies
