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通过对佛古源区沉积相的研究,可以还原沉积古环境并给后期勘探开发部署井位提供依据。运用野外剖面露头和岩心观察、铸体薄片及扫描电镜等分析测试手段,发现研究区长6油层主要发育结构成熟度高、分选较好的灰色细粒长石砂岩;长6期主要发育三角洲前缘亚相沉积,其中四支北东向南西展布的水下分流河道为主要沉积微相,水下分流河道砂为研究区长6油层优势砂体,且砂体展布方向与水下分流河道展布一致。
Through the study of the sedimentary facies of the Fuyuan source area, the sedimentary paleoenvironment can be restored and the basis for exploration and development and deployment of wells in the later stage can be provided. Using the outcrop and core observation of field profile, casting thin slices and scanning electron microscopy, it is found that the main development structure of Chang 6 reservoir in the study area is well-matured and has finely sorted gray fine-grained feldspathic sandstone. The frontier subfacies sediment, of which four northeast to southwest distribution of the underwater distributary channel as the main sedimentary microfacies, underwater distributary channel sand for the study area 6 sandstone dominant sand body, and sand distribution direction and underwater The distribution of shunting rivers is consistent.