title: An improved predictive correlation for the induction time of CaCO3 scale formation during flow in porous media.
abstract: The induction time, tind, of calcium carbonate precipitation in porous rocks was experimentally measured under dynamic conditions at temperatures from 25 to 120 degrees C with the use of a radiotracer technique, where the gamma-emitting nuclide 47Ca was used as a tracer in order to monitor the scale deposition at real time. Based upon nucleation theory and experimental observations, the following improved correlation is proposed: This equation predicts satisfactorily the induction time of calcium carbonate scale formation under specific dynamic (flow) conditions in the near-well region (T is the absolute temperature in K, and SI is the saturation index, SI=logSR, where SR is the saturation ratio).
authors.affiliation: School of Chemical Engineering, National Technical University of Athens (NTUA), Greece; National Centre for Scientific Research Demokritos (NCSRD), 15310 Agia Paraskevi, Attica, Greece. manos@ife.no
authors.forename: E
authors.initials: E
authors.lastname: Stamatakis
authors.forename: A
authors.initials: A
authors.lastname: Stubos
authors.forename: J
authors.initials: J
authors.lastname: Palyvos
authors.forename: C
authors.initials: C
authors.lastname: Chatzichristos
authors.forename: J
authors.initials: J
authors.lastname: Muller