Loose Pattern Under The Condition Of Fracture-pore Type Reservoir 3D Geological Modeling

This paper mainly uses reservoir geology,sedimentology,structural geology as theoretical guidance,according to core,logging,seismic and outcrop data,combined with gas reservoir development practice,block strata,structure,sedimentary microfacies,reservoir characteristics and control factors are analyzed for Keshen 9 based on the strata and cycle.The results show that the thickness of the second and the third member of Bashijiqike Formation are stable,and the first member of Bashijiqike Formation is denuded by different degrees.Development of fan delta,braided river delta front deposition,the microfacies are mainly underwater distributary channel,underwater distributary,estuary dam.The phase band is distinct from the north and south,and it is relatively stable from the east and west.The reservoir rock type is lithic feldspar sandstone,the reservoir property is poor,and it is the low-permeability and porosity reservoir.The fractures are mainly high Angle-vertical seam in the study area,and the fractures are more developed in the vicinity of the fault and the structural curvature.The research area has no regional isolation,but the interlayer developed.There is no significant change in the thickness of the interlayer in the east-west direction,but the number of interlayer is increasing in the south-north direction.The reservoir is controlled by sedimentary,diagenetic and tectonic action.Gas-water contact is the haidi-6470 m,and the gas reservoir type is the edge-water-layer gas reservoir.This paper uses mudstone as the target phase and the sandstone as the background phase,based on the target method,the lithofacies model is established;the matrix porosity and matrix permeability are controlled by using the phased attribute.Using core observation and image logging interpretation of fracture parameters as the hard data,using the distance from the fault and structural curvature as the soft data,using well testing data analysis for dynamic correction,stochastic simulation generated fracture development density model,and then generate discretization network model,and its equivalent into fracture properties model;the gas saturation model is simulated by the sequential gaussian stochastic method.