weight: bold" lang=EN-US>Stratigraphic Base-Level Cycles and Sedimentary Microfacies of Es₂-7 Formation in the Shengtuo Oilfield

• 责任者：Wen Lifeng (Faculty of Resource and Information Technology ; China University of Petroleum ; Beijing 102249 ; China) ; Wu Shenghe
• 刊名：Geology in China
• 出版年：2010
• 卷期：37(1)
• 关键词：沙河街组 ; Shahejie Formation ; 基准面旋回 ; base-level cycle ; 沉积微相 ; sedimentary microfacies ; 东营凹陷 ; Dongying Depression
• 页码：p.144-151
• 图表：8 illus., 12 refs.
• 分类号：0803
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

Combining borehole data with dynamic data from the oil development area of Es₂-7 Formation in the Shengtuo Oilfield, the authors studied the features of the high resolution sequence stratigraphy and the sedimentary microfacies in different base-level cycles. The results show that the hierarchical base-level cycles are well developed and composed of one long-term cycle, two middle-term cycles and nine short-term cycles, indicating the hierarchical change of the accommodation space to sediment supply ratios (A/S) in a vertical direction. Several smaller cycles with decreasing-increasing A/S ratios were observed on a general decreasing A/S background.