(16)--201905GRE-chap1.4气藏工程气藏工程.ppt

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1、1.4 Properties of reservoir water1 Water formation volume factorBw1 m3/sm3Pure waterWater with dissolved gas1 Water formation volume factor1 Water formation volume factor (1)Water FVF-the McCain correlation the volume corrections for temperature:the volume corrections for pressure:2 Solution gas-wat

2、er ratioThe volume of gas measured at standard conditions,which is dissolved in unit volume of surface water at reservoir conditions.2 Solution gas-water ratio Solution gas-pure water ratio-the McCain correlation Ranges:l000P10000 psia and 100TF340F2 Solution gas-water ratio Solution gas-Brine water

3、 ratio-the McCain correlation Rsw=solution-gas/brine ratio,scf/STB;S=salinity,wt%solids;TF=temperature,F;Rswp=solution-gas/pure-water ratio,scf/STB Ranges:0S30wt%solids and 70TF250F.3 Water compressibility At pressures above the bubblepoint pressure of the water-the Osif correlation Cw=isothermal co

4、mpressibility of formation water,psi;P=pressure,psia;S=salinity,g NaCl/L;and TF=temperature,F Ranges:l000P20000 psi,0S200g NaCl/L,200TF270F3 Water compressibility At pressures below the bubblepoint pressure-the Ramey correlationCwMcCain Procedures4 Water viscosity Formation water viscosity at 1atm-t

5、he McCain correlation Ranges:100TF400F and 0S26 wt%solids4 Water viscosity Formation water viscosity at reservoir pressure-the McCain correlation This correlation,which is accurate to within 4%for P10000 psia and within 7%for 10000P15000 psia,was developed for limited temperature range of 86TF167F50MPa0.1MPa60g/LPure water4 Water viscosityThank you for your attention!