摘要
通过大量的岩心、测井、化验资料综合分析,查明了长6油层的沉积特征和沉积微相的平面展布规律,尤其是在砂岩和粉砂岩中发现了次生矿物海绿石,从而认为陕北姚店油田长6油层发育的是一套三角洲前缘亚相砂体,而不是三角洲平原亚相。其中三角洲前缘亚相包括河口砂坝、远砂坝和支流间湾微相。在综合考虑宏观沉积背景及微观沉积特征的基础上,根据沉积相的演化规律,建立了研究区沉积模式。
Through comprehensive analysis on core data,log- ging data and chemical experiment data,sedimentary fea- tures of the 6th oil layer of Yanchang formation and the distribution of sedimentary microfacies have been identi- fied.As glauconite of secondary mineral is found to be ex- isted in sandstone and siltstone,a suit of delta front sub- facies sandbodies,not the delta plain subfacies are consid- ered to be developed in the 6th oil layer of Yanchang for- mation.The delta front subfacies include river mouth bar, distal bar and tributary bay subfacies.On the basis of macro depositional setting,micro sedimentary features and evolution regularity of sedimentary facies,sedimenta- ry patterns of the research area have been established.
出处
《石油地质与工程》
CAS
2007年第1期12-14,共3页
Petroleum Geology and Engineering
关键词
河口坝
远砂坝
沉积特征
沉积模式
river mouth bar
distal bar
sedimentary features
sedimentary pattern
