Wells – Processes – Distinct – separate injection and producing wells
Patent
1980-11-10
1983-12-20
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166274, E21B 4322
Patent
active
044211686
ABSTRACT:
An improved recovery process is provided for fluent petroleum in a porous formation having spaced injection means and production well recovery means which includes a concentrated brine drive and surfactant carrier system. By injecting an aqueous drive medium having gradually decreasing brine concentration, surfactant transport and petroleum recovery efficiency are improved. Advantageously, an effective aqueous surfactant composition is formulated containing a water-soluble ether-linked sulfonate surfactant, a cosurfactant alcohol, and at least one cosurfactant or sacrificial sulfonate material in a concentrated brine carrier.
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Gilman M. G.
Huggett C. A.
Kenehan E. F.
Mobil Oil Corporation
Novosad Stephen J.
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