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以地球化学分析为手段,对研究区万昌组—齐家组油气来源进行分析,并通过对已知油气藏的解剖,建立了2种不同种的成藏模式,进而对油气分布规律进行了归纳总结。研究表明,梁家构造带油、气分别来源于不同层位的烃源岩,烃类流体的类型由油源断层所沟通烃源岩成熟度差异性决定,而油气层的分布主要受优质扇三角洲前缘河口坝、席状砂储层发育情况控制。
By means of geochemical analysis, the source of hydrocarbon in Wanchang Formation-Qijia Formation in the study area is analyzed, and through the anatomy of known oil and gas reservoirs, two different reservoir forming modes are established, and the hydrocarbon distribution rules are further studied In conclusion. The results show that the oil and gas of Liangjia structure originate from source rocks of different layers respectively. The type of hydrocarbon fluids is determined by the difference of maturity of source rocks communicated by the source faults, while the distribution of oil and gas layers is mainly affected by high quality fan Control of the development of delta front mouth mouth bar and sheet sand reservoir.