STORE Feature - Cement, CO2, Confining Stress & Conductive Pathways

From Science Direct:

Nicolas J. Huerta
Steven L. Bryant
(STORE Team Member)
Brian R. Strazisar
Barbara G. Kutchko
Lauren C. Conrad

February 2011 -- Wells remain inadequately studied with respect to the probability and rate of leakage in geologic CO2 sequestration. Efforts to  model reaction-induced leakage along wells have been limited due to poorly understood reaction between cement and  sequestered CO2 fluids.

Recent work on class H cement under reservoir conditions has shown a slow reaction rate, even  considering the timescale of interest for CO2 sequestration (Kutchko et al. [1]). This observation is consistent -with field scale  observations at a CO2 enhanced oil recovery operation (Carey et al. [2]). These results suggest that loss of well integrity from degradation of intact cement is not a significant leakage risk.  

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Cement,CO2,Confining Stress & Conductive Pathways