Zhaoyuan South Fuyu Oil Layer Of Sedimentary Microfacies Study

This article take full advantage of the dense well development well logging, and part ofthe exploratory well logging data, high-resolution sequence stratigraphy, sedimentarypetrology, reservoir geology, and the latest theory, a detailed study of Zhao Nan region F I1-F II2-layer deposition unitdivision and correlation of19small layer of sedimentarymicrofacies on the basis of a detailed analysis of studies. Small layer divided by studyingsedimentary cycle as the main line, ranging from thick to the characteristics, similarities andthick as a secondary phase mode for total control "principle, in Fuyu oil layer, the secondgroup identified three medium-term datum cycle interface, and further divided into fiveshort-term base level cycle bottom-named as: the F II2, the F II1, the F Ⅰ, the F Ⅰ,2, the FⅠ,1cycle; that the head stratigraphic segment are mainly developed delta diversion plainsub-phase, followed by littoral shallow lake and delta front subfacies, identifying nine kindsof microfacies, which distributary channel micro is the main sand body type; in this area inthe water to recede to the end of the period of water into the beginning of the period of F II-FI just, is from prosperity to decline and fall of the evolution of river deltas.