滨里海盆地北部-西北部盐下油气成藏主控因素  

The Major Controlling Factors of Sub-salt Petroleum Accumulation in North-northwest Margin of Pre-Caspian Basin

作　　者：吴婧[1] 田纳新[1] 石磊[1] 

机构地区：[1]中石化石油勘探开发研究院,北京100083

出　　处：《武汉理工大学学报》2015年第1期109-115,共7页Journal of Wuhan University of Technology

基　　金：国家重大专项课题(2011ZX05031-001)

摘　　要：通过对盆地构造沉积演化和地质条件进行分析,结合典型油气田勘探实例,对研究区盐下层系的油气成藏主控因素进行分析。认为碳酸盐岩台地和斜坡区发育的礁滩相储层为大型油气田的形成提供了有效储集空间,巴什基尔末期的构造抬升运动造成的风化淋滤作用改善了储集层的储集性能,不整合面和断裂构成了良好的运气运移通道。北部-西北部断阶带KT-2储集层段具有较大的勘探潜力。The sedimentary evolution and geological characteristics of north-northwest Pre-Caspian Basin, which are the most essential oil ＆ gas enriched regions, are studied. The petroleum accumulation mechanism of pre-salt formations is analyzed on the basis of data acquired from recent exploration activities. It is found that the reservoir of reef beach facies developed at carbonate platform and slope areas provided effective volume for hydrocarbon accumulation of large oil/gas field. The porous high-permeable carbonic carbonate reservoirs were formed and promoted through weathering and leaching affects caused tectonic uplift occurred at late Bash Gil. Faults and unconformities are main migration pathways. Exploration potential lays in KT-2 Formation of North-Northwest step-fanlt areas.

关 键 词：油气成藏 运移通道 油气储层 滨里海盆地 

分 类 号：TE111[石油与天然气工程—油气勘探]