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By D. O. Shah
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6-9, 1974. , Hasiba, Η. , "Alkaline Waterflood for Wettability Alteration - Evaluating a Potential Field Application," J. Pet. Technol. XXVI, 1335-1343 (1974). Gale, W. , and Sandvik, Ε. , "Tertiary Surfactant Flooding: Petroleum Sulfonate Composition-Efficacy Studies," Soc. Pet. Eng. J. 13, No. 4, 191-199 (1973). Bilhartz, H. , and Charlson, G. , "Field Polymer Stability Studies," Paper SPE 5551, presented at 50th Annual Fall Meeting of the Society of Petroleum Engineers of AIME, Dallas, Texas, Sept.
42 W . Β. G O G A R T Y 280 240 ο 200 v. ω ι 160 -j Ο I 120 80 40 0 1971 Fig. 8. f\ ί 1972 v . ' ' ' Ί'973' '' ι 1975 Oil -production for the Bingham expansion project recovery within the confined area of the project is 5,000 bbl of oil per acre, or about 312 bbl/acre-ft. This recovery factor is based on the affected rather than the gross reservoir. The test results for Illinois and Pennsylvania have provided proof of the technical feasibility of using high-concentration surfactants in micellar solutions to displace and recover oil in previously waterflooded reservoirs.
The initial increase in oil cut for the low-concentration surfactant flood occurs at essentially the same point as the high-concentration flood. ) Pressure (percent) factant injected) 32 1—Gale & Sandvik 2 (15) 2—Hill et al. 9 ~0 Fig. 1. 6 THROUGHPUT, PORE VOLUMES Tertiary production history for low- and highconcentration surfactant floods these floods are typical of tertiary recovery operations where oil is banked during early slug injection and only water is produced from the reservoir, which is at essentially residual oil.