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USING COLLOIDAL SILICA AS ISOLATOR, DIVERTER AND BLOCKING AGENT FOR SUBSURFACE GEOLOGICAL APPLICATIONS

United States Patent Application

20140174739
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A system for blocking fast flow paths in geological formations includes preparing a solution of colloidal silica having a nonviscous phase and a solid gel phase. The solution of colloidal silica is injected into the geological formations while the solution of colloidal silica is in the nonviscous phase. The solution of colloidal silica is directed into the fast flow paths and reaches the solid gel phase in the fast flow paths thereby blocking flow of fluid in the fast paths.
Bourcier, William L. (Livermore, CA), Roberts, Sarah K. (Livermore, CA), Roberts, Jeffrey J. (Livermore, CA), Ezzedine, Souheil M. (Berkeley, CA), Hunt, Jonathan D. (Dublin, CA)
Lawrence Livermore National Security, LLC (Livermore CA)
13/ 722,843
December 20, 2012
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT [0001] The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.