Research On Reservoir Heterogeneity Of Toutunhe Formation In Well Blocks Lu-151,Junggar Basin

Toutunhe Reserve in well blocks Lu-151 is fault anticline structure,including J₂t₂¹ reservoir,J₂t₂² reservoir and J₂t₁ reservoir.The water cut rising fast,production decline and low recovery degree of three reservoir since the water injection development.Whatever,the three reservoir have difference result of the oil displacement.With means of reservoir-numerical-simulation,the distribution of remaining oil,the relation of sedimentary microfacies,reservoir heterogeneity and remaining oil are also be studie.It provide theoretical basis for further oil-gas development in well blocks Lu-151.Considering the problems above,using core analysis test data,log data,tracer monitoring data and production performance data.Toutunhe Formation in well blocks Lu-151 with braided river sedimentary environments includes diara microfacies and braided channel microfacies,which are the main controlling factors of the physical property of reservoir and reservoir heterogeneity.J₂t₂² reservoir and J₂t₁ reservoir is middle prosperous and middle permeable and weak heterogeneity,however J₂t₂1 reservoir is middle prosperous and low permeable and high heterogeneity.With means of reservoir-numerical-simulation,remaining oil distribution in vertical direction distributed in the low permeability zone,remaining oil distribution in plane direction distributed the top of the sand body.Sedimentary microfacies and plane heterogeneity control the remaining oil distribution in plane direction,and intraformational heterogeneity controls the remaining oil distribution in vertical direction.