锦州25-1S大型混合花岗岩潜山油藏发现的启示

在分析渤海锦州25—1S大型潜山油藏和辽东湾地区的亿吨级的JZ25—1S大型混合花岗岩潜山复合油气藏成藏条件的基础上，综合分析了大型潜山油藏的成藏规律，认为大型潜山油藏的成藏除了基本的石油地质条件外，还必须具备的条件独特的区域构造与沉积环境和断裂与岩性的耦合。构造与沉积条件要求生油岩要直接覆盖在潜山之上，也就是潜山顶部只有新生界沉积，其风化效果好时，潜山基岩岩性与基底断裂的发育的耦合也就决定了能否形成大型潜山油气藏。

Inspiration of Discovery of 25-1S Big Composite Granite Buried Hill Reservoir

On the basis of analyzing 25-1S big buried hill reservoir in Jinzhou of Bohai Oilfield and JZ 25-1S big mixed granite and composite buried hydrocarbon reservoir, the rules of big reservoir formation are integrally analyzed. It is considered that the basic geologic condition is necessary for forming the big buried reservoir, also the regional structure and sedimentary environment with special conditions and fault coupling with lithology are provided. It is required that structural and sedimentary conditions shall directly cover the buried hill, thus there is only Cainozoic deposit on the top of buried hill, where weathering is proper,the forming of big buried reservoir is determined by coupling the buried matrix lithology with the growing of basement fracture.