乌南地区下油砂山组沉积微相研究

通过大量岩心、测井资料分析,以及关键井全井段测井-沉积相划分,结合区域沉积背景与体系分析,确定了乌南地区下油砂山组所发育的沉积相、亚相与微相类型.认为乌南地区下油砂山组主要发育三角洲前缘-滨浅湖亚相,划分为八种主要微相类型:水下分流河道、水下分流河道间、河口坝、远沙坝-席状砂、前三角洲泥、滨浅湖泥、滩、坝.其中,滩坝、...

Study on sedimentary microfaciea of lower Yonshashan formation in Wunan area

Through the massive core samples, the loginformation analysis, as well as the key well entire section oil well logging-sedimentary facies division, combined with the region deposition background and the systematic analy sis, sedimentary facies, sub-facies, and microfacies model developed in Wunan area lower Youshashan formation has been determined. Which developed delta front-shore shal low lake subfacies, and divided eight main micro facies types: underwater distributary channel, underwater distrib utary interchannel, river mouth bar, sandbar-sheet sand, front delta slime, beach slime, beach, dam. Among which beach dam, river mouth dam are main type of studied area. Based on this, the research was carried on various oil layer sedimentary facies planar distribution rule and the analysis of deposition faces evolution rule provides the important geo logical basis for the oil-field development.