CPC C09K 8/572 (2013.01) | 15 Claims |
1. A method for consolidating a subterranean geologic formation, the method comprising:
injecting a first composition, a second composition, and a third composition into the subterranean geologic formation, wherein the first composition comprises CaO, the second composition comprises MgO, and the third composition comprises NH4HF2;
injecting a first thermochemical fluid comprising NaNO2 and a second thermochemical fluid comprising NH4Cl into the subterranean geologic formation to raise a temperature of the subterranean geologic formation to 120-180° C.;
reacting the third composition respectively with the first composition and the second composition to form CaF2 and MgF2 in the subterranean geologic formation; and
precipitating the CaF2 and the MgF2 on sand grains of the subterranean geologic formation to bind the sand grains together into a consolidated matrix in the subterranean geologic formation.
|