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- W2357706235 abstract "The composition and the performance properties of an S/P combinational flooding fluid are studied experimentally in laboratory for high temperature and high salinity blocked sandstone reservoir HU-12 in Zhongyuan.In experiments,the test temperature is of 98℃;the test solutions are prepared in the oilfield produced water of TSD=122.4 g/L and Ca~(2+)+Mg~(2+) 1.0 g/L;the crude oil used has underground density 0.8236 g/cm~3 and viscosity 9.11 mPa·s.Petroleum sulfonates MJ2 and DQ are chosen from 11 commercial surfactants and their 0.4% solution has ultralow equilibrium interfacial tension of 10~(-3) mN/m.The apparent viscosity at 7.34 1/s is rather low,4 mPa·s,for mixed S/P solutions(MS/PSs) of 0.3% MJ2 or DQ and commercial HPAM Y1,Y2 (of M=1.7×10~7,2.4×10~7,respectively) and is satisfactory for MS/MSs of 0.3% MJ2 or DQ and hydrophobically associating polymers AP-P4,AP-P5(of hydrophobe molar fraction 0.2%,0.25%,respectively),being of 50 mPa·s at polymer dosage 1.5 g/L.A wide peak of apparent viscosity appears at surfactant dosage 0.1—0.3% for MJ2 or DQ/1.5 g/L AP-P5 MS/PSs.80% recovery of apparent viscosity is observed in 60 min and 85%—in 10 hrs of standing of the MJ2 and DQ/AP-P5 MS/PSs having been sheared at stirring speed 11000 r/min in 0.5 min.Injecting 0.25 PV of 0.05—0.50% MJ2/1.5 g/L AP-P5 MS/PS into reservoir cores leads to an enhancement in oil recovery increased with increasing MJ2 dosage,being of 20%(OOIP) at MJ2 dosage 0.25%." @default.
- W2357706235 created "2016-06-24" @default.
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- W2357706235 date "2005-01-01" @default.
- W2357706235 modified "2023-09-23" @default.
- W2357706235 title "S/P Combinational Flooding Fluid for High Temperature and High Salinity Sandstone Reservoirs: A Laboratory Study" @default.
- W2357706235 hasPublicationYear "2005" @default.
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