Research on Sedimentary Microfacies of P Oil Layer Group in S Oilfield

Abstract. Based on the static and dynamic data of hydrocarbon reservoir achieved from each stage, guided by high-resolution sequence stratigraphy and delicate fluviatile sedimentology, this paper completed the research on sedimentary microfacies of P oil layer group within the research scope, which belongs to the leading edge of river-delta depositional system. Researchers successfully identified fThe types of sedimentary microfacies, including underwater distributary channel, sheet sand, mouth bar and inter-distributary mud. Eletrofacies model was established on the conclusive feature of each sedimentary microfacies. Then researchers accomplished the stratigraphic division and correlation and sedimentary facies analysis of 12 sedimentary units, which help conclude the sedimentary evolution of target stratigraphic position. The final results will surely provide a reliable theoretical basis for oil production