断-砂配置油气聚集条件及油气富集主控因素分析

为了研究断-砂配置在油气藏形成与分布中的作用,在断-砂配置所形成油气藏类型及特征研究的基础上,采用断-砂配置与油气分布之间空间配置关系分析的方法,对断-砂配置的油气聚集条件及油气富集的主控因素进行了研究。结果表明:油气运移条件不同,断-砂配置油气聚集条件也不同。油气沿砂体侧向运移条件下断-砂配置油气聚集条件是断层侧向封闭,而油气沿断裂垂向运移条件下断-砂配置油气聚集条件是上覆存在区域性盖层阻挡。断-砂配置油气富集主要受到3个因素的控制:1反向断裂有利于断-砂配置油气聚集成藏;2交叉断裂有利于断-砂配置油气聚集成藏;3断层侧向封闭性控制着断-砂配置油气富集程度。

Oil-gas accumulation conditions and main factors controlling oil-gas accumulation ofmatching between faults and sandbody.

To study role of matching between faults and sandbody in oil-gas accumulation and distribution, based on the study of types and characteristics of oil-gas reservoirs formed by matching between faults and sandbody, oil-gas accumulation conditions and main factors controlling oil-gas accumulation of matching between faults and sandbody were studied by the method analyzing space matching relation between matching between faults and sandbody and oil-gas distribution. The result indicates that if oil-gas migration conditions is different, oil-gas accumulation condition of matching between faults and sandbody is lateral sealing of faults if oil-gas migrates laterally along sandbody. Oil-gas accumulation condition of matching between fault and sandbody is sealing of upper regional caprock. If oil-gas migrates vertically along faults, controlling of matching between faults and sandbody to oil-gas accumulation has following three aspects:1Transoid fault is favorable for oil-gas to accumulate in matching between faults and sandbody;2cross faults is favorable for oil-gas to accumulate in matching between faults and sandbody;3lateral sealing of faults controls oil-gas accumulation degree in matching between faults and sandbody.