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
166273, 166274, 166295, 523130, E21B 33138, E21B 4322
Patent
active
049037676
ABSTRACT:
A process for the selective gelation of a polymer for profile control during carbon dioxide flooding. First, a size selective gel is formed ex-situ. Upon entering a thief zone or a more permeable low pH zone resultant from carbon-dioxide flooding, the gel forms a solid, firm gel. This gel comprises an aqueous composition of a partially and fully alkylated melamine resin and an xanthan polymer. Size selectivity is imparted by the partially alkylated resin and the polymer. Upon contact with the low pH environment, active melamine resin is released from the fully alkylated resin which reacts with the polymer to form a stable, solid gel. Once the solid gel has formed, steam-flooding, water-flooding or a carbon-dioxide oil recovery process is commenced in a zone where a solid gel has not formed.
REFERENCES:
patent: 4157322 (1979-06-01), Colegrove
patent: 4513821 (1985-04-01), Shu
patent: 4565249 (1986-01-01), Pebdani et al.
patent: 4569393 (1986-02-01), Bruning et al.
patent: 4673038 (1987-06-01), Sandiford et al.
patent: 4716966 (1988-01-01), Shu
patent: 4776398 (1988-10-01), Chu et al.
patent: 4787451 (1988-11-01), Mitchell
patent: 4793416 (1988-12-01), Mitchell
Sampath Krishnaswamy
Shu Paul
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Suchfield George A.
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