Research On The Sedimentary Facies Of The Third Member Of Shahejie Formation In Bonan Oilfield

Bonan oilfield is located within Hekou district,Dongying city,Shandong province. Regional tectonics located within Bonan seg of the northeast of zhanhua sag of jiyang depression.Bonan oilfield is composed of fault block lithologic reservior which feature is low porosity,low viscosity,low saturation and deep buried.This research area is primarily located in the south of Bonan oilfield,the structure belongs to the flat fault belt on Bonan depression.At present,the chance is becoming smaller and smaller to discover the large-scale or medium-sized reservoir during middle-late oilfield development.Meanwhile the long-accumulated contradictions have become gradually apparent,for instances,the complicated oil-water relationship,existing the recognized differences about sand body distribution rule,sand body'connecting relationship not clear,existing the big contradiction between inside and outside of layer and plane ,and so on. If these problems can be solved,the exploration potential of Bonan oilfield can be further promoted and lay a good basis for improving the recovery ratio and studying the remaining oil.So it is necessary to do a detailed,comprehensive research into sedimentary facies of this region.The content of this study is the sedimentary facies of the third member of shahejie formation on Bonan oilfield.When completed studying the geological character of Bonan oilfield.Depends on the core observation and analysis of wireline logging data,based on the sequence stratigraphy to contrast 200 Wells'formation.Based on the sedimemtology,conduct an integrity research to sedimentary's color, style,sediment structure and electric character,etc.And combined with analysis single well and well tie phase,to carry on a study about the rule of the third member of shahejie formation sand body's plane and section distribution on Bonan oilfield and establish the sedimentary phase module.Draw up single well diagram,even well section,sandstone isopach map,sedimentary phase diagram,studying exhibits that the sedimentary of middle and upper of the third member of shahejie formation is mainly consisted of fan delta system in this region.the other of shahejie formation is turbidite deposits.