Sedimentary Microfacies Of The Third Member Of The Denglouku Formation In The Southern Area Of Shuangcheng And Its Control On Oil-water Distribution

The Denglouku oil layer in the southern area of Shuangcheng in the northern Songliao Basin is a newly discovered layer system and is in the stage of rolling exploration evaluation and development.Systematic research has not yet been carried out in terms of series-layer comparison standards,regional provenance direction,depositional environment,and oil-water distribution rules.Relevant work needs to be carried out to effectively guide the later development and adjustment.In this paper,guided by theoretical methods such as fine sedimentology,sequence stratigraphy and development geology,make full use of logging and core data in the Shuangchengnan area,combined with 3D seismic processing data,to carry out fine sequence division and comparison in the study area;Use methods such as heavy mineral distribution,sand-to-land ratio,and seismic attributes to analyze the provenance direction of the third member of the Deng section in this area;start from the analysis of the sedimentary environment,combined with the lithoelectric response,analyze the characteristics of typical sedimentary types,and conduct sedimentary microfacies on key horizons Anatomy;combined with the above research,analyze the control law of sedimentary micro-relative oil-water distribution.Obtained the following knowledge: established the subdivision and comparison standard of the third member of the Deng section in the study area,divided it into 3 sand groups,17 sub-layers and 20 sedimentary time units;proposed 3 facies,6 subfacies,16 microfacies and 24 energy facies.The logging facies model determines that this area is a southeast near short-source alluvial fan ? oxidized shallow water sandy braided river delta deposition model;due to the blocking effect of faults,there is no unified oil-water interface in the entire area.In the oil-bearing trap,the sand body contains oil The performance is obviously controlled by microfacies.The oil-bearing properties of various channel sediments and center-bank sedimentary sand bodies are the best.It is clear that the various channel microfacies sand bodies distributed in a strip along the southeast direction on the plane are important controls for oil-water distribution.Therefore,it provides a basis for the economic and effective development and deployment of the Shuangcheng South area in the future.