Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate
2007-04-26
2008-12-02
Bates, Zakiya W (Department: 3676)
Wells
Processes
Cementing, plugging or consolidating
C166S300000
Reexamination Certificate
active
07458424
ABSTRACT:
A delayed gelling system useful in conformance control in the production of petroleum from subterranean formations, especially low permeability formations, is disclosed. The gelling system comprises a basic silica sol, an activator comprising a hydroxyl donor, and an optional syneresis inhibitor. In the disclosed method of using the gelling system, the gelling system may be pumped into formations with excessive water and/or gas production and thermally activated in the formation at downhole conditions to form a hard gel to reduce water and/or gas production.
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Chaabouni Hassan
Chan Keng Seng
Enkababian Philippe
Odeh Nadir M. M.
Bates Zakiya W
Cate David
DiTrani Angela M
Fonsca Darla
Mitchell Thomas O.
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