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• W2894093618 abstract "Abstract Current chemical EOR technologies, such as surfactant polymer flooding, have limitations, such as, high temperature, high salinity, and/or low permeability reservoirs. Low tension foam flooding, however, can be performed at high or low temperatures, salinities, and permeabilities. Low tension foam reduces residual oil saturation and increases sweep efficiency. The current literature shows the effect of foam in corefloods and limited 2-D micro-model experiments. We investigate the ability of low-tension foams to successfully divert flow into lower permeability zones in both communicating and non-communicating heterogeneous systems. During this laboratory study, a surfactant that has shown success for foam applications in the field was evaluated and used as a baseline to compare and evaluate low tension foam formulations. We measured resistance factors under constant pressure and constant flow conditions. In addition, we established benchmarks for flow diversion. The low-tension formulations were modified to display foaming abilities and compared against the baseline surfactant benchmarks. Phase behavior experiments were conducted to determine the oil solubilization ratio of each surfactant formulation. Foam floods with surfactant formulations with favorable solubilization ratios were conducted in heterogeneous systems to determine sweep efficiency and oil recovery. Surfactant formulations were developed that showed favorable apparent viscosities during in situ foam floods and improved sweep efficiency in a dual-permeability communicating system comparable to the baseline foam. During oil recovery experiments in a heterogeneous system, the baseline surfactant recovered approximately 40% of the remaining oil while the low-tension formulation recovered over 70% of the remaining oil. This study indicates that we can use low tension foams to successfully divert flow from high permeability zones to low permeability zones in heterogeneous sand packs and recover oil at the same time." @default.
• W2894093618 created "2018-10-05" @default.
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• W2894093618 date "2018-09-24" @default.
• W2894093618 modified "2023-10-16" @default.
• W2894093618 title "Low Tension Foam Flooding for Chemical Enhanced Oil Recovery in Heterogeneous Systems" @default.
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• W2894093618 doi "https://doi.org/10.2118/191706-ms" @default.
• W2894093618 hasPublicationYear "2018" @default.
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