| 东营凹陷南坡东段潜山地层划分与残留地层展布 |
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| 引用本文： | 杨怀宇.东营凹陷南坡东段潜山地层划分与残留地层展布[J].现代地质,2019,33(4):811-819. |
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| 作者姓名： | 杨怀宇 |
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| 作者单位： | 1.中国石化胜利油田分公司 勘探开发研究院,山东 东营 2570002.中国石化胜利油田分公司 博士后流动工作站,山东 东营 257000 |
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| 基金项目： | “十三五”国家科技重大专项 “渤海湾盆地精细勘探关键技术(三期)(”2016ZX05006);中国石化胜利油田分公司博士后项目“古湖泊水介质对岩相组合的控制作用研究”(YKB1214) |
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| 摘 要： | 东营凹陷南坡东段的潜山勘探程度很低,复杂的残留地层结构及其发育模式认识不清严重制约着潜山的精细勘探。综合应用野外标准岩石地层对比、古生物群落时代划分及不整合测井综合分层等技术,重新厘定研究区的深部层系地层归属与划分方案。在此基础上,应用构造演化恢复技术搞清多期构造运动对地层剥蚀、残留的控制作用,最终明确残留地层平面的展布特征。研究表明,研究区中生界残留地层仅分布在王古2井区以北地区,南部草桥-王家岗南部广大地区则为上古生界地层;由于研究区遭受印支运动挤压成山、燕山运动拉张裂陷等多幕构造运动影响,残留地层表现为近北西向“跷跷板”状的地层产状模式。该成果可为东营凹陷的复杂潜山油气藏勘探提供理论指导。
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| 关 键 词： | 东营凹陷南坡 中-古生界 地层划分 残留地层展布 |
| 收稿时间： | 2018-10-20 |
| 修稿时间： | 2018-12-08 |
Stratigraphic Division of Buried-hill and Residual Strata Distribution in Eastern Section of Dongying Depression Southern Slope |
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| YANG Huaiyu.Stratigraphic Division of Buried-hill and Residual Strata Distribution in Eastern Section of Dongying Depression Southern Slope[J].Geoscience——Journal of Graduate School,China University of Geosciences,2019,33(4):811-819. |
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| Authors: | YANG Huaiyu |
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| Institution: | 1. Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying,Shandong 257000, China2. Working Stations for Postdoctors, Shengli Oilfield Company, SINOPEC, Dongying,Shandong 257000, China |
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| Abstract: | The degree of buried-hill exploration is low in the eastern section of the Dongying depression southern slope, as impacted by the complex structure of residual sedimentary sequences and development model. The stratigraphic division of deep sedimentary formations in the study area have been reviewed by means of field lithostratigraphic correlation, paleontological division and unconformity logging integrated stratigraphic division. Based on that, tectonic reconstruction has been applied to evaluate the control of the multiphase structural activities on the erosion of the sedimentary sequences. Distribution characteristics of residual sequences are clarified. The results show that Mesozoic residual sequences in the study area are only distributed in the area north of Wanggu Well 2, whereas the southern Caoqiao-Wangjiagang contains mainly Upper Paleozoic sequences. The compressional Indosinian tectonics and the extensional Yanshanian rifting may have created the NW-trending seesaw-type pattern for the buried-hill residual sequences. Our results offer a theoretical guidance on the complex buried-hill exploration in the Dongying depression. |
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| Keywords: | southern slope of Dongying depression Mesozoic-Paleozoic stratigraphic division residual sequence distribution |
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