Search International and National Patent Collections

1. (WO2018204113) PLUGGING AND SEALING SUBTERRANEAN FORMATIONS, USING A COLLOIDAL SILICA COMPOSITION

Pub. No.:    WO/2018/204113    International Application No.:    PCT/US2018/028843
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Tue Apr 24 01:59:59 CEST 2018
IPC: C09K 8/42
Applicants: SAUDI ARABIAN OIL COMPANY
ARAMCO SERVICES COMPANY
Inventors: KALGAONKAR, Rajendra Arunkumar
WAGLE, Vikrant Bhavanishankar
HUANG, Jin
AL-YAMI, Abdullah Saleh Hussain
Title: PLUGGING AND SEALING SUBTERRANEAN FORMATIONS, USING A COLLOIDAL SILICA COMPOSITION
Abstract:
A subterranean formation sealant includes a mixture of an aqueous colloidal dispersion including silica nanoparticles and a C6-C12 fatty acid. Heating the sealant above 70°C initiates gelation of the sealant. Sealing an opening in a water or gas producing zone in a subterranean formation includes providing a sealant including a mixture of a colloidal dispersion including silica nanoparticles and a C6-C12 fatty acid to the water or gas producing zone, initiating gelation of the sealant in situ, and solidifying the sealant in the water or gas producing zone to yield a set gel, thereby sealing the opening in the water or gas producing zone.