山东惠民凹陷火成岩原生油气藏

The Primary Oil-gas Reservoirs of Igneous Rocks within Huimin Depression, Shandong Province

山东惠民凹陷临南沉积洼陷及其斜坡带上分布有多个辉绿岩侵入体，它们吸收围岩生成的油气而形成原生油气藏。以夏３８井辉绿岩透镜体为例，对生油围岩（沙三段）的生油条件及火成岩储层的储集条件进行了分析，并用地球化学分析方法证实了火成岩体中的油气来源。在此基础上，阐述了这类火成岩油气藏的成因特点及其石油地质意义。

Several hypabyssal diabase bodies, scattered over Huimin depression and its slopezone in Shandong Province, entrapping the hydrocarbon generated by surrounded source-bed, constitute the primary oil-gas reservoir. Taking a diabase lens of Xia-38 well as a example, the generating conditions of surrounded source rocks and the accumulative oh aracteristics of the diabaselenshave been analysed. The fact that the hydrocarbon in the lens do come from surrounded source rocksis demonstrated geochemically. Futhermore, the genetic behavour and the implications in petroleumgeology about this type of reservoirs are discussed.