Research On Remaining Oil Distribution And Designing And Optimizing For Adjustment In C55

The seismic body model, structural model of subdividing layers, sedimentary facies modelof many phases riverway and facies controlling property models of the test area were built based onfully using the logging and seismic information of Chao55block, combining digitizedsedimentary facies data, using the geologic modeling software Petrel and borehole-seismiccomprehensive method. And the research on the effect of fracture parameters on water cut inthe fractural low permeability reservoir dual media model were conducted by using idealmodel. The refined history matching of separated-zone water injection has been performed byusing the numerical simulation software Eclipse. The reasonable fracture parameters of testarea were set in the process of history matching and multiple technical means for dualporosity media model history matching were put forward. The history match indexes includeOOIP, composite water cut, single well water cut and recovery percent, etc. The numericalsimulation model was refined based on the history matching.The remaining oil distribution of all kinds of plane single sand body and Longitudinal oilzone in test area before and after infilling for ten years has been calculated and analysed basedon refined history matching. And the causes and types of remaining oil in test area weresummarized and different types of remaining oil were quantized.Potential tapping measures for different types of remaining oil in the test area wereproposed by combining geologic characteristics of test area. The effects of enhancing oilrecovery for different tapping potential measures such as cyclic waterflooding, shallow profilecontrol, in-depth profile control, fine water injection, acidizing, fracturing and water pluggingwere calculated separately, and a set of comprehensive tapping potential measures applied totest area was optimal designed. The paper provides favorable basis for quantizing remainingoil, research on tapping potential measures at present and further development anddeployment in test area.