Reservoir Description Of Zhongshanchuan Chang6Oildom In Wayaobao Oilfield

Zhongsanchuan oildom of WaYaoBao oilfield is located within the territory ofshaanxi ZiChang country. Chang6reservior of ZhongShanchuan oildom belongs todeltaic deposit，with111.36Km2oil-bearing area and30.5208million tons geologicalreserves. Sand body deposition is mainly delta plain distributary channel, and sandbody distribution is as the north-south west toward the east, affected by river channeland control. Reservoir of research area is low porosity and low permeability,mainlychanracterized with weak hydrophilic, but with water injection development, movingregularity of water has become increasingly complex, so many problems andcontradictions exposed unceasingly, the flat contradiction and contradictions betweenlays of injection become serious, water flooding effection becomes poor, andwater-cut of oil field rises fast, therefore on the basis of reservoir description, presentsituation of water flooding development is analysed, the reasonable adjustmentscheme of water injection development is put forward, methods of oilfield long-termproduction are discussed, and meanwhile timely deployment of comprehensivecontrol scheme has been very important. Therefore, it is necessary to carry outreservoir description of the studied area.With sedimentology, geology and reservior engineering theory for guidance,combining cores, logging information, test data and other information, the feature oftectonics, sedimentary facies, lithology characteristics、percolation characteristics andfour characteristics of zhongshanchuan chang6oildom have been analyzed. Based onthese studies, through the system research on characteristics of low porosity lowpermeability reservoir rock and pore structure, physical properties and electricalcharacteristics, formation mechanism of low porosity low permeability reservoir ismade clear. With the comprehensive study of pore structure, log interpretation modelsof low porosity and low permeability reservoir parameters are established, theporosity, permeability, irreducible water saturation, and effective thickness parametersof the study area are determined accurately, which provide reasonable theory basis for calculation of reserves and economic evaluation of Chang6reservior ofZhongsanchuan oildom, and also have important significance to provide decisionbasis and technical support for further exploration.