The Study On The Migration Rule Of Water-oil By Using Quasi-tracer Method

The three-dimensional structural and property models were built base on the geological information of the Middle Xing-2 block and restraint by the digit achievement of sedimentary facies, using the geologic modeling software Petrel. The refine history matching of separated-zone water injection and quasi-tracer has been performed, and the history match indexes include OOIP, reserve pressure, water cut, recovery percent, production curve of tracer, etc. The numerical simulation model was refined base on the history matching.The method to determine the inflow percentage of each direction was derivated base on the Brigham-Smith model. The study on the migration rule of water-oil was carried on after the numerical simulation model was refined. Inflow direction of plane and zones that water breakthrough of vertical were determined by the quasi-tracer method. The relation between inflow direction and sedimentary, and relation between zones that water breakthrough and sedimentation type were analyzed in the same way.The remaining oil distribution was analysis about longitudinal peace, planar distribution, the reason of oil remaining was found, and strategies and measures were proposed for producing different type of remaining oil, according to the numerical simulation results.