The viscosity of straight chain hydrocarbons (n-hexadecane, n-octadecane, and n-eicosane), isomers of octane (n-octane, 2,2,4-trimethylpentane and cyclooctane) and aromatic compounds (toluene) has been measured at pressures from 6MPa to 242MPa and at temperatures from 304K to 533K.These extreme conditions are representative of those encountered in ultra-deep petroleum formations beneath the deepwaters of the Gulf of Mexico. The measurements are taken with a novel windowed Inconel rolling-ball viscometer designed by our team that is calibrated with n-decane.            A comparison of our data with previous data for n-octane and isooctane (no data has been published to such pressures for cyclooctane) shows mean average percentage deviation (MAPD) ranging from 2.9% to 29% for the six previous papers published.            The viscosity results are modeled with the free volume theory model in conjunction with density values obtained using the Peng-Robinson equation of state (EoS) or the PC-SAFT EoS. The MAPD values obtained with this model range from 1.0 to 3.5%.

Viscosity of hydrocarbons at high temperatures and pressures

248th National Meeting (2014)

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