海相油气地质2017，Vol.22Issue(4)：1-10,10.DOI:10.3969/j.issn.1672-9854.2017.04.001
四川盆地奥陶系岩相古地理与勘探潜力
Lithofacies Paleogeography and Exploration Potential of Ordovician in Sichuan Basin
摘要
Abstract
Based on the outcrop and drilling data, we reconstructed the Ordovician lithofacies paleogeography map in Sichuan Basin with a method of single-factor analysis and multi-factor comprehensive mapping. There developed coastal facies, alluvial tidal flat facies, limited platform facies, open platform facies and slope-basin facies from west to east. According to the hydrocarbon source conditions, Late Ordovician Wufeng Formation developed in limited sea is high-quality source rocks, in addition, when connected by faults, the overlying Silurian Longmaxi Formation and the underlying Lower Cambrian Qiongzhusi Formation are effective source rocks. According to the reservoir conditions, dolomitization, supergene dissolution, and fracture development are the key factors for the formation of Ordovician carbonate reservoirs. Correspondingly, three types of reservoirs developed including particle-gravel dolomite reservoir, karst reservoir in Tongzi Formation and Honghuayuan Formation, and crack reservoir in Baota Formation. The Ordovician developed two sets of reservoir assemblages, i.e., the lower part and the upper part, which have good exploration potential.关键词
四川盆地/奥陶纪/岩相古地理/油气成藏/勘探潜力Key words
Lithofacies paleogeography/Hydrocarbon accumulation/Exploration potential/Ordovician/Sichuan Basin分类
能源科技引用本文复制引用
刘伟,洪海涛,徐安娜,姜华,石书缘..四川盆地奥陶系岩相古地理与勘探潜力[J].海相油气地质,2017,22(4):1-10,10.基金项目
本文受国家科技重大专项"下古生界—前寒武系碳酸盐岩油气成藏规律与勘探方向"(编号:2016ZX05004-001)与中国石油天然气股份有限公司重大科技专项"深层大油气田形成与分布"(编号:2014E-32-01)资助 （编号:2016ZX05004-001）
