Wells – Processes – Distinct – separate injection and producing wells
Patent
1980-02-19
1982-03-16
Guynn, Herbert B.
Wells
Processes
Distinct, separate injection and producing wells
166275, 252 855D, E21B 4322
Patent
active
043196365
ABSTRACT:
Disclosed is a surfactant waterflooding oil recovery process for use in high salinity water-containing formations employing two separate surfactant-containing slugs or a single slug in which the composition is changed from the first to the last portion of the slug injected into the formation. The first portion of the surfactant fluid contains a surfactant combination which exhibits optimum low surface tension characteristics, and the second or latter portion of the surfactant slug contains a blend of surfactants which produces a high viscosity fluid. Use of hydrophilic viscosity-increasing polymer is thus avoided, eliminating the interaction between polymer and surfactant which causes a reduction in surfactant effectiveness.
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patent: 4110229 (1978-08-01), Carlin et al.
patent: 4125158 (1978-11-01), Waite et al.
patent: 4181178 (1980-01-01), Savins
patent: 4199027 (1980-04-01), Cox et al.
Kudchadker Mohan V.
Whittington Lawrence E.
Guynn Herbert B.
Kulason Robert A.
Park Jack H.
Ries Carl G.
Texaco Inc.
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