Research On Development Scheme Adjustment Of Ng-Ed₂ Reservoir Group In East Of 1st District Of Shangdian Oilfield

Shang District 1st have been exploited for more than thirty years.The study area is at a high water cut stage,for low utilization rate of water injection and existing well network no longer adapt to reservoir development.In order to solve the main problems existing in the exploiting process in the area,an adjustment scheme for exploiting Shang District 1st must be carried out as soon as possible.Guilding by the theory of petroleum geology of development,this paper systematically analyzes reservoir feature and its development characteristic and mainly analyzes the heterogeneity of the reservoir plane,layer and interlayer.It evaluates development effect by injecting water and quantitatively analyzes the distribution of residual oil in horizontal,vertical and longitudinal direction.Based on the analysis results,it researches an adjustment scheme for exploiting Shang District 1st.This paper mainly following results and understanding are obtained:?1?The current oil at a low degree of recovery,high water cut development stage,stable yield.But with the reasonable injection production well network compared with the present well pattern,situation of oil sand body adaptability,local area well pattern is not perfect,control degree of water flooding in low,extension area reservoir grade difference of oil-water relationship is not clear,problems still outstanding,increase reserves control degree of water flooding potential is still huge.?2?The planar nonhomogeneous permeability for Ng and Ed is different.To Ng,it belongs to river sediments.Its planar nonhomogeneous permeability is controlled by sedimentary facies.The permeability in the direction of channel is much higher than that in vertical channel direction.To Ed,it is the delta sediments,Its planar nonhomogeneous permeability is controlled by sedimentary facies.However,the planar nonhomogeneous is different for inner single layer.From the perspective of reservoir physical property,layer heterogeneity for Ed₂⁴ is weaker than that for Ng₃¹,Ed₂³.The in-layer heterogeneity is controlled by sand rhythm characteristics and barrier thickness.?3?The remaining oil research shows thatNg₂⁵,Ed₂⁴ remaining oil enrichment degree is high and these layers of residual oil reserves abundance movable high value areas mainly in Northeast and South of the area.?4?Simulation esultsased on the comprehensive geological study,numerical,developeda comprehensive adjustment plan,comprehensive adjustment scheme can achieve better development effect.