气藏工程气藏工程气藏工程 (6).pdf

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1、1.4 Properties of reservoir water1 Water formation volume factorwswfwVVBBw1 m3/sm3Pure waterWater with dissolved gas1 Water formation volume factorwwCC14100.57.3MPaCw1 Water formation volume factor (1)Water FVF-the McCain correlation)1)(1(wpwTwVVB27421050654.51033391.1100001.1FFwTTTV210721391025341.

2、21058922.31072834.11095301.1PPTPPTVFFwp the volume corrections for temperature:the volume corrections for pressure:2 Solution gas-water 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 Solutio

3、n gas-pure water ratio-the McCain correlation2CpBpARswp37242101654.21091663.11012265.615839.8FFFTTTA31027521094883.21005553.31044241.71001021.1FFFTTTB)1037049.21034122.21053425.8130237.002505.9(104936247FFFFTTTTC Ranges:l000P10000 psia and 100TF340F2 Solution gas-water ratio Solution gas-Brine water

4、 ratio-the McCain correlation)0840655.0(285584.010/FSTswpswRR 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 O

5、sif correlation1)4033000.5375.541033.7(1FTwwwTSppBBc Cw=isothermal compressibility 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 correlationTsw

6、wgTwwwpRBBpBBc1CwMcCain Procedures4 Water viscosity Formation water viscosity at 1atm-the McCain correlationBFwAT1 Ranges:100TF400F and 0S26 wt%solids3321072213.831334.040564.8574.109SSSA46352421055586.11047119.51079461.61063951.212166.1SSSSB4 Water viscosity Formation water viscosity at reservoir pressure-the McCain correlation2951101062.3100295.49994.0ppww 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!