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含油气系统研究是当今石油地质界最为热门的研究课题之一 ,在油气勘探中日愈发挥重要作用。在中国陆相多旋回复合叠加型盆地背景下的含油气系统多表现为复杂的多源多灶多期生烃和成藏。这种复杂的含油气系统有 3个较突出的特点 :1多源多灶导致系统叠置和交叉 ;2多阶段多期生烃、成藏和变动导致多源混生 ;3多个关键时刻。在复杂含油气系统的演化过程中 ,常有多期大规模的油气运移过程 ,因此 ,在研究过程中要重视过程的恢复。文章最后以准噶尔盆地玛湖 -盆 1井西复合含油气系统为例具体阐述了复杂含油气系统的特征。
Petroleum system research is one of the most popular research topics in petroleum geology today, playing an increasingly important role in oil and gas exploration. The hydrocarbon-bearing systems in the multi-cycle superimposed basin of China have many complicated multi-source and multi-stage hydrocarbon generation and accumulation. There are three salient features of this complex petroleum system: 1 Multi-source and multi-focus lead to system overlays and crossovers; 2 multi-stage multi-stage hydrocarbon generation, reservoir formation and alteration lead to multi-source mixing; more than 3 key moments. In the evolution of complex petroleum systems, there are often large-scale oil and gas migration processes, so attention should be paid to the recovery of the process during the research. Finally, the article elaborates the characteristics of complex petroleum systems by taking the West Composite Oil and Gas System of Mahu - Pen 1 Well in Junggar Basin as an example.