石油勘探与开发2011，Vol.38Issue(1)：16-22,7.
鄂尔多斯盆地3条油藏大剖面对风险勘探的意义
Significance of three reservoir profiles for the risk exploration in Ordos Basin
摘要
Abstract
The Ordos Basin went through six main stages of geological evolution, developed three sets of soure rocks, two unconformities, several sets of reservoirs and caprocks, and had three typical petroleum systems, i.e. Lower Paleozoic Ordovician gas reservoirs, Upper Paleozoic Carboniferous-Permian gas reservoirs, and Mesozoic Triassic-Jurassic oil reservoirs. Three well profiles of oil and gas reservoirs in the basin are analyzed, which are the Wuzhong-Mizhi profile, Guyuan-Yichuan profile, and Baotou-Chengcheng profile. The size and distribution of the oil and gas reservoirs are controlled by the spatial distribution of soure rocks. Mesozoic oil reservoirs are located inside or near hydrocarbon depressions, where oil and gas had a short secondary migration distance. Paleozoic gas in the basin, after having a largescale short migration in the range of source rocks, eventually gathered in the effective traps of the Ordovician weathering crust, and in the low permeability effective sand traps inside or near Carboniferous-Permian source rocks. The future risk exploration targets are: (1) for Mesozoic oil exploration, it will extend northward and explore unconventional reservoirs in source rocks; (2) for Upper Paleozoic gas exploration, it will extend southward and explore marine clastic gas reserviors; (3) for Lower Paleozoic gas exploration, it will search for lithologic-structural traps of carbonate weathering crust in the north-central and southeastern Yishan slope and those of carbonate reef flat.关键词
鄂尔多斯盆地/油气藏剖面/含油气系统/风险勘探分类
能源科技引用本文复制引用
赵振宇,郭彦如,徐旺林,张延玲,高建荣,张月巧..鄂尔多斯盆地3条油藏大剖面对风险勘探的意义[J].石油勘探与开发,2011,38(1):16-22,7.基金项目
国家大型油气田与煤层气开发项目(2008ZX05001-004 （）
2008ZX05004-001) （）
中国石油天然气股份有限公司"岩性地层油气藏富集规律与勘探技术研究"重大专项(2008B-0103) （2008B-0103）
中国石油天然气股份有限公司"海相碳酸盐岩大油气田勘探开发关键技术"重大专项(2008E-0706) （2008E-0706）
中国石油科技创新基金资助(2010D-5006-0104) （2010D-5006-0104）
