海相油气地质2017，Vol.22Issue(3)：12-22,11.DOI:10.3969/j.issn.1672-9854.2017.03.002
鄂尔多斯盆地中东部奥陶系马家沟组沉积相演化模式研究
Sedimentary Facies Evolution Model of Ordovician Majiagou Formation,Central-Eastern Ordos Basin
摘要
Abstract
Based on the observation of outcrops, cores and thin sections, and analysis of logging data and experiment data, the sedimentary microfacies of Ordovician Majiagou Formation in Ordos Basin are studied systematically. Furthermore, the evolution models of sedimentary facies are established by synthetic analysis of paleoclimate and paleo-sedimentary patterns. It is indicated that: (1)There are two types of paleo-sedimentary framework of Majiagou Formation: sag-and-swell type and single-sag type; (2)Nine types of microfacies are developed in Ordovician Majiagou Formation. According to the combination of these sedimentary microfacies in the lateral direction at different sea level, a complete transgressive-regressive cycle can be subdivided into six stages: early, mid and late stages of transgression and early, mid and late stages of regression; (3)The distribution of sources, reservoirs and cap rocks of Majiagou Formation is controlled by paleo-climate, paleosedimentary pattern and sea-level fluctuation. It is concluded that the grain bank and dolomite flat developed in eastern uplifted zone and adjacent areas during transgressional period have a good reservoir-forming condition and can be expected to be a new favorable potential area of carbonate exploration.关键词
鄂尔多斯盆地/马家沟组/古沉积格局/沉积微相/沉积模式/成藏条件Key words
Paleo-sedimentary framework/Sedimentary microfacies/Depositional model/Reservoir-forming condition/Majiagou Formation/Ordos Basin分类
能源科技引用本文复制引用
于洲,丁振纯,吴东旭,董岩,郭婷,刘文..鄂尔多斯盆地中东部奥陶系马家沟组沉积相演化模式研究[J].海相油气地质,2017,22(3):12-22,11.基金项目
本文受国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05004-002)和中国石油天然气股份有限公司重大科技专项"深层油气勘探开发关键技术研究"(编号:2014E-32)联合资助 （编号:2011ZX05004-002）
