Research On The 3D Geological Model Of Ng4 Formation In Lindong District Of Linfanjia Oilfield

Lindong district is located in the eastern part of Linfanjia Oilfield in Jiyang Depression.After more than 30 years of exploration and development,reservoir development become more difficult.As the sedimentary facies of the main strata Ng4(sand grouqs 4 of Lower submember Guantao formation)in the area,the distribution of reservoirs and so on were still unclear,the objective understanding of Geology and production contradiction and so on,seriously restrict the reservoir development.Based on the previous studies,through the tectonic features in this region,the sedimentary characteristics,reservoir characteristics,comprehensive analysis and research,make the Ng4 as target stratum,to establish the fine 3D geological model,provide a basis for the development and deployment of the follow-up measures block development adjustment plan.The main research results and cognition are as follows:(1)Based on seismic interpretation,by using the method of well logging data,log data,seismic attribute analysis and so on,using the indicator horizon which under the control of marker formation to divide the Ng4 into 7 sublayer.(2)Through the way of logging phase identification,single well phase analysis and seismic attribute extraction,five microfacies have been identified,which were the channel,levee,crevasse splay,flood plain,and abandoned channels.(3)Through the secondary logging interpretation,reservoir distribution feature analysis,reservoir fluid properties discuss,to describe distribution of Ng4 reservoir in the work area.The results show that the distribution of reservoirs in the region is controlled by sedimentary microfacies,the channel microfacies are the prolific zone,the levee are subinferior to channel,and they are characterized by compensatory rules among sublayers.(4)Based on the fine geological research,through the method of deterministic simulation and stochastic simulation,we have established the structural model,the sedimentation model,the reservoir model and the reservoir geological mode of Ng4 respectively,and each steps were under quality controls.