Kinetics of reaction between gelled HCl and dolomite Ca_1.16Mg_0.84(CO₃)₂ and filtration of gelled acid in a reservoir core sample
by Oleg V. Andreev; Sergey M. Antonov; Konstantin V. Kiselev
International Journal of Oil, Gas and Coal Technology (IJOGCT), Vol. 14, No. 4, 2017

Abstract: The dynamic viscosities of polyacrylamide (PA) or xanthan gum-gelled aq. HCl (12 wt %) have been determined at a temperature of 12°C and a pressure of 10 MPa. Weight loss rate curves for dolomite Ca_1.16Mg_0.84(CO₃)₂ samples exposed to gelled hydrochloric acid have been fitted by the Avrami equation; rate constants of reactions and their ratios have been determined. Quantitative characteristics of filtration have been determined for gelled HCl in the Ca_1.16Mg_0.84(CO₃)₂ carbonate reservoir core samples simulating reservoir conditions. The Damköhler numbers and filtration form of channels have been experimentally determined and calculated. [Received: February 22, 2015; Accepted: January 25, 2016]

Online publication date: Mon, 20-Mar-2017

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