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- W2366442364 abstract "In polymer flooding,polymer molecules undergo sifting by pore throats when passing through porous media.According to the bridging principle,the relationship between the hydrodynamic radius(R_(h)) of molecule that can block pore throat and the radius of pore throat(R) is: R_(h)0.46R.The median of average radii of pore throats in reservoirs suitable for polymer flooding ranges from 4μm to 16μm.The main peak of normalization weighting distribution function((f(R_(h)))) relating to the size of polymer molecular clew appears in the range of 10nm to hundreds of nm,sometimes with a secondary peak in which R_(h) is thousands of nanometers or even bigger.With salinity increasing and electric field strengthening in solution,the bigger the size of the clew,the easier is it to be compressed.The compression makes the peak of f(R_(h)) move to the direction of bigger molecular size.The molecular structure modification of comb-shape polymer(CP) boosts the rigidity of backbone chain,as a result,the R_(h) of CP and accordingly the viscosity of solution increase.Compared with HPAM with almost the same molecular weight and degree of hydrolysis,the change of viscosity of CP solution is a bit bigger than that of R_(h).Polymer molecular clews with R_(h) of thousands of nanometers or bigger can block the porous medium with small pore-throat radius,especially when the polymer solution is prepared with fresh water." @default.
- W2366442364 created "2016-06-24" @default.
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- W2366442364 date "2006-01-01" @default.
- W2366442364 modified "2023-09-25" @default.
- W2366442364 title "Compatibility between polymer molecular size and pore throat in reservoirs" @default.
- W2366442364 hasPublicationYear "2006" @default.
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