通过精细地层划分与对比,结合沉积微相、重矿物组合分析,发现研究区长61沉积微相以三角洲前缘水下分流河道、水下分流间湾及前缘席状砂多期叠切组合而成,为油气成藏提供了有利的储集条件;运用岩石铸体薄片、扫描电镜、压汞、能谱分析、电子探针等分析,发现储层虽然以低孔特低渗透为主,但结构成熟度高,分选均匀,局部物性较好,最终预测出建产有利区3个,面积共计40km2。 By means of fine stratigraphic division and contrast, combined with the analysis of sedimentary microfacies and heavy minerals, it is found that the Chang 61 sedimentary microfacies in the study area are characterized by multi-stage superimposed combination of delta front submarine distributary channel, The results show that the reservoirs are characterized by low porosity and ultra-low permeability, which are favorable for hydrocarbon accumulation. By using the thin film of cast rock, scanning electron microscope, mercury intrusion, energy spectrum analysis and electron probe analysis, However, the structure has high maturity, uniform sorting and good local physical properties. Finally, it is predicted that there are 3 advantageous areas for construction and production, with a total area of ​​40km2.