松辽盆地三肇地区扶余油层致密油成藏模式研究

Accumulation models of tight oil in Fuyu reservoir of Sanzhao area in Songliao basin

松辽盆地三肇地区青一段烃源岩厚度大,有机碳含量高,已成熟;扶余油层的砂岩储集空间以残余粒间孔和长石溶孔为主,断层控制油气成藏与分布,发育断层、岩性和断层-岩性油气藏3种类型,具有剖面上叠置、平面上连片分布的特点,为准连续的分布模式。青一段烃源岩与扶余油层属于"上生下储"的源储关系,具有垂向直接供烃、垂向间接供烃和侧向直接供烃三种油气成藏模式。

The hydrocarbon source rocks of Qingyi member in Sanzhao area of Songliao basin are characterized by big thickness, high and mature organic carbon content. The reservoir space of Fuyu reservoir is mainly of remaining intergranular pores and feldspar karst pores. The hydrocarbon accumulation and distribution are controlled by the faults and there are three reservoir types, the fault reservoir, the lithology-fault reservoir and the lithology reservoir, with the characteristics of superposition distribution in section and continuous distribution in plane. The hydrocarbon source rocks of Qingyi memberand Fuyu oil reservoir belong to the source-reservoir relationship of ‘upper source and below reservoir', which has the vertical direct hydrocarbon accumulation model, vertical indirect hydrocarbon and lateral direct hydrocarbon accumulation models.