Sensitivity of Interfacial-tension Predictions to Parachor-method Parameters

Abstract

The parachor method (PM) is widely used to predict interfacial tension (IFT) but may yield incorrect IFT values, and, thus, adjustment of the PM parameters may be necessary. The sensitivities of IFT predictions to the PM parameters were investigated by examining the Weinaug and Katz method (WKM) and the Lee and Chien method (LCM). Parameter adjustment of only the scaling exponent does not always yield good regression results, and including parachors (or related variables) in a set of regression parameters is recommended. The WKM may result in unrealistic parameter adjustment due to the absence of interrelation between the scaling exponent and the parachor. In contrast, the LCM honors the correct definition of the parachor and tends to yield acceptable IFT predictions within the limits of realistic parameter adjustment.

Measurements and Modeling of Interfacial Tension for CO2/CH4/Brine Systems under Reservoir Conditions

“…Most of the previous IFT models originated from the Parachor model. ,,,− For example, Chalbaud et al developed a correlation on the basis of the Parachor model taking into account the influence of temperature, pressure, salt presence, and chemical structure of CO 2 . Ayirala and Rao proposed a new mechanistic Parachor model based on mass transfer to predict IFT in multicomponent hydrocarbon systems.…”

Observation of Stepwise Association of Petroleum-derived Asphaltene and Maltene Components by Surface Tension Measurements

“…Comparison of the elemental composition and nuclear magnetic resonance (NMR) results of the two fractions indicates that ASIL had higher aromaticity (fa) and greater heteroatom (S, N, and O) content. The structural parameters calculated by Sato's method 13) suggested that ASIL had a slightly larger aromatic ring sizes, but shorter aliphatic chains than MaIL.…”

“…1 H-NMR and 13 C-NMR Spectroscopy 1 H-NMR and 13 C-NMR spectra were measured in CDCl3 with total mass spectra (TMS) as the internal standard using a Lambda 500 FT-NMR spectrometer at a proton resonance frequency of 600 MHz.…”