US 12,269,990 B2
Method for treating unconsolidated subterranean formations
Amjed Mohammed Hassan Sheikh Mohammed, Dhahran (SA); Mohamed Ahmed Nasr Eldin Mahmoud, Dhahran (SA); Sidqi Ahmad Abu-Khamsin, Dhahran (SA); and Ammar Husseiny Aly El-Husseiny, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Sep. 5, 2024, as Appl. No. 18/825,309.
Application 18/825,309 is a continuation of application No. 18/449,372, filed on Aug. 14, 2023, granted, now 12,116,529.
Prior Publication US 2025/0059430 A1, Feb. 20, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/57 (2006.01)
CPC C09K 8/572 (2013.01) 15 Claims
OG exemplary drawing
 
1. A method for treating an unconsolidated subterranean geologic formation, comprising:
injecting an organic solvent selected from the group consisting of ethylene-glycol-monobutyl ether, diesel and toluene into the subterranean geologic formation to partially dissolve crude oil in the subterranean geologic formation; then
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.