Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 286, Issue 1, Pages 7-13Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2004.12.040
Keywords
induction time; scale formation; calcium carbonate; porous media
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The induction time, t(ind), 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 Ca-47 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: log t(ind) (min) = 3.2 - 3.1/SI - 959.8/T + 1849.9/SIT. 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 = log SR, where SR is the saturation ratio). (c) 2005 Elsevier Inc. All rights reserved.
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