滨里海盆地AshkS地区盐上构造演化及油气成藏模式
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摘要
滨里海盆地是世界上油气最丰富的盆地之一,以下二叠统上部孔谷阶厚层盐岩为界可以将整个剖面分为岩上层系和盐下层系。A shkS地区位于滨里海盆地阿斯特拉罕-阿克纠宾斯克隆起带和中央凹陷带东部,主要是以盐上为勘探目的层系的地区。本文主要利用区内二维地震资料进行构造演化分析,通过分析认为T 2+3时期是盐上油气成藏的关键时期。通过对区内油气成藏条件分析认为岩上油藏主要是次生油藏,油源主要来自于盐下石炭-泥盆系的碳酸盐和黑色页岩。区内主要发育地层不整合遮挡、地层超覆尖灭、盐边遮挡、断层遮挡以及盐檐等圈闭类型。
The Pre-Caspian Basin is one of the world's richest oil and gas basins.Entire section can be divided into two parts : post-salt strata and pre salt strata by the salt strata of the Lower Permian Kungurian.Block AshkS which lies in the east of cetral depression and astrakhan-aktyubinsk uplift zone of Pre-Caspian Basin is the exploration targets of post-salt.This paper uses two-dimension seismic data for tectonic evolution.It points out that:the critical stages of post-salt reservoir formation is T2+3 stage.Throuth analysis of the oil and gas accumulation conditions,It points out that post-salt reservoir are mainly secondary reservoir.Hydrocarbon resources are mainly carbonate and dark shale of pre-salt Carboniferous-Devonian.The block develops unconformity trap、stratigraphic overlap pinch trap、fault trap、salt canopies and so on.
The Pre-Caspian Basin is one of the world's richest oil and gas basins.Entire section can be divided into two parts : post-salt strata and pre salt strata by the salt strata of the Lower Permian Kungurian.Block AshkS which lies in the east of cetral depression and astrakhan-aktyubinsk uplift zone of Pre-Caspian Basin is the exploration targets of post-salt.This paper uses two-dimension seismic data for tectonic evolution.It points out that:the critical stages of post-salt reservoir formation is T2+3 stage.Throuth analysis of the oil and gas accumulation conditions,It points out that post-salt reservoir are mainly secondary reservoir.Hydrocarbon resources are mainly carbonate and dark shale of pre-salt Carboniferous-Devonian.The block develops unconformity trap、stratigraphic overlap pinch trap、fault trap、salt canopies and so on.
引文
[1]余海洋.滨里海盆地科尔占地区盐下油气成藏条件及成藏模式[J].中国石油勘探,2008,12(6):67~71.
[2]钱桂华.哈萨克斯坦滨里海盆地油气地质特征及勘探方向[J].中国石油勘探,2005,10(5):60~66.
[3]张淮,饶轶群,张挺军,等.哈萨克斯坦滨里海盆地盐下层系油气成藏组合特征及勘探方向[J].中国石油勘探,2007,2(1):81~86.
[2]钱桂华.哈萨克斯坦滨里海盆地油气地质特征及勘探方向[J].中国石油勘探,2005,10(5):60~66.
[3]张淮,饶轶群,张挺军,等.哈萨克斯坦滨里海盆地盐下层系油气成藏组合特征及勘探方向[J].中国石油勘探,2007,2(1):81~86.
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