Wells – Processes – Distinct – separate injection and producing wells
Patent
1988-12-30
1990-02-27
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166272, 166274, 166295, 166300, 523130, E21B 33138, E21B 4322, E21B 4324
Patent
active
049037668
ABSTRACT:
An aqueous gel composition is formed from xanthan gum crosslinked with ions of a transitional metal, resorcinol, and formaldehyde. The gel which initially forms is injected into a formation where it selectively enters pores in a more permeable zone. Once in the more permeable zone, the gel reheals and forms a shear and thermally stable gel. This gel can be used in high temperature formations in addition to those formations having a pH of from about 3.0 to about 10. After the shear and thermally stable gel has formed, a steam-flooding, water-flooding, or a carbon dioxide oil recovery process is commenced in a zone of lesser permeability.
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Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Suchfield George A.
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