摘要
通过研究油气藏和流体参数的分布特征,系统地分析塔中地区Ⅰ号断裂带上奥陶统礁滩复合体油气藏的特征和主控因素。研究表明,塔中Ⅰ号断裂带上奥陶统油气藏在分布上呈现出"外带气、内带油"的特征;原油表现为低密度、低黏度、高含蜡、中低含硫,气油比变化很大;天然气为普遍高含硫化氢的干气。通过深入剖析油气藏的储集层、油气源断裂、构造等控制因素,认为塔中Ⅰ号断裂带上奥陶统礁滩复合体油气藏整体上是储集层控油,而局部范围为构造控油,油、气源断裂是关键,气侵通道影响油气藏分布。塔中Ⅰ号断裂带礁滩复合体的勘探应该重点寻找有利储集层,储集层条件好(裂缝-孔隙型储集层最好)、有沟通油气源断裂、局部构造有利的区域是勘探的有利地带。
Characteristics and controlling factors of the Upper Ordovician reef-shoal complex petroleum reservoirs in the No.1 fault belt of the Tazhong area were analyzed systematically by studying the distribution and fluid parameters of the hydrocarbon reservoirs.The hydrocarbon reservoirs are characterized by ＂gas in the outer belt and oil in the inner belt＂.Crude oil has low density,low viscosity,high wax content,middle-low sulfur content,and highly varied oil/gas ratio.Natural gas is generally dry gas with high H2S content.An in-depth study of the controlling factors such as reservoirs,source faults,and structures reveals that reservoir beds control oil as a whole and structures control oil locally in the Tazhong No.1 fault belt.Faults pertinent to oil source is crucial,and channels of gas intrusion affect the distribution of hydrocarbons.The exploration of reef-shoal complexes in the Tazhong No.1 fault belt is supposed to focus on the seeking of favorable reservoirs with faults connecting oil-gas source and local high structures.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2010年第4期409-415,429,共8页
Petroleum Exploration and Development
基金
国家重点基础研究发展计划(973)项目"塔中复式油气藏分布规律及形成机理"(2006CB202308)
关键词
油气藏特征
油气富集机理
上奥陶统
塔中Ⅰ号断裂带
塔中地区
塔里木盆地
petroleum reservoir characteristics
hydrocarbon accumulation mechanism
Upper Ordovician
Tazhong No.1 fault belt
Tazhong area
Tarim Basin
作者简介
陈治军（1980-），男，陕西安康人，现为中国石油大学（北京）硕士研究生，主要从事石油地质与勘探研究。地址：北京市昌平区，中国石油大学215#信箱，邮政编码：102249。E-mail：chenzhijun2203@yahoo．com．cn
