Calculation Methods Optimization of Deviation Factor for Overpressure Gas Reservoir

With the acceleration in oil and gas exploitation,more and more abnormal high pressure gas reservoirs are developed.The precision of its deviation factorhas a direct impact on the gas reserves calculation accuracy and the results reliability of dynamic analysis.The gas deviation factor values under the given comparing temperature and pressure are investigated in overpressure gas reservoir,and errors comparative analysis is made between the results from four calculation modes and Standing-katz by deviation factor map.The analysis shows that the calculation mode of H-Y deviation factor is more applicable to the deviation factor calculation for abnormal high pressure gas reservoir.