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The influence of water level changes on sand bodies at river-dominated delta fronts:The Gubei Sag,Bohai Bay Basin

Petroleum Science 2022年第1期19卷 58-73页

作者： Yang Zhang Zheng Shi Ji Li Jun-Wei Wang Bao-Liang Yang Ji-Guo Jiang Faculty of Petroleum China University of Petroleum(Beijing)Karamay CampusKaramayXinjiang834000China College of Resources and Environmental Engineering Guizhou Institute of TechnologyGuiyangGuizhou550003China Experiment Testing Institute PetroChina Xinjiang Oilfield CompanyKaramayXinjiang834000China Research Institute of Exploration and Development PetroChina Xinjiang Oilfield CompanyKaramayXinjiang834000China School of Geosciences China University of PetroleumQingdaoShandong266580China Zhuangxi Oil Production Plant Sinopec Shengli Oilfield CompanyDongyingShandong257000China

Changes in water level are one of the important factors controlling the constructive characteristics of *** paper studies the influence of water level changes on sand bodies in the third member of the Shahejie Formation(Es3)on the gentle southern slope of the Gubei Sag,Bohai Bay Basin and draw some conclusions that,for complex sand bodies,with the increase in water level the distributary channels bifurcate frequently,from a simple branching shape to a network shape along with the increase in the development of crevasse splays,mouth bars and sheet *** single sand bodies,with an increase in water level in the slope zone of the lake basin close to the source area,the superimposition style transitioned from vertical cutting-stacking and lateral isolation to vertical stitching,isolation and lateral ***,in the central zone of the lake basin far from the source area,the superimposition style transitioned from vertical stitching and lateral stitching to vertical isolation and lateral *** water level stays stable,the greater the distance from the source area the greater the disaggregation ratio of a single sand *** the same distance from the source area,higher water level tends to result in greater disaggregation ratio of a single sand body.

关键词： Water level changes River-dominated delta delta front sandbodies Paleogene Shahejie Formation Gubei Sag of Bohai Bay Basin

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