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dc.contributor.advisorWillhite, Paul G.
dc.contributor.authorLiu, Zhijun
dc.description.abstractThe objective of this research was to identify high performance surfactant formulations and design efficient core floods for a limestone reservoir with high salinity formation brine. Microemulsion phase behavior experiments were conducted to identify best chemicals formulation (including surfactants, alcohol, alkali, polymer and electrolyte) for core flood test. A successful formulation should be one clear stable phase at reservoir conditions, fluid microemulsion phase, fast equilibration and high solubilization ratio. Formulations with glycol ether alcohols were easier to achieve one clear stable phase than formulations with sec-butanol. Primary surfactant-to-cosurfactant ratio and alcohol concentration were fine tuned to obtain fluid microemulsion phase and sufficiently high solubilization ratio. Core floods with optimized formulation validated its high oil recovery efficiency (95-99%) in Berea sandstone cores with synthetic formation brine. The effect of surfactant slug size, surfactant slug/polymer drive viscosity and formation brine composition was discussed to design more efficient core flood. The properties of the aqueous phase from chemical flood, e.g. total dissolved solids, viscosity and pH were measured to help understand oil displacement process in the core during the chemical flood. Core floods in Indiana limestone cores yielded low oil recovery (27-41%) suffering from large dispersion of the core. Recommendations were made to improve oil recovery on future limestone core floods and field application.
dc.format.extent272 pages
dc.publisherUniversity of Kansas
dc.rightsThis item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
dc.subjectPetroleum engineering
dc.subjectAlkali surfactant polymer flooding
dc.subjectCore flooding
dc.subjectEnhanced oil recovery
dc.subjectHigh salinity formation brine
dc.subjectInterfacial tension
dc.subjectPhase behavior
dc.titleExperimental Evaluation of Surfactant Application to Improve Oil Recovery
dc.contributor.cmtememberMcCool, Stan
dc.contributor.cmtememberLiang, Jenn-Tai
dc.thesis.degreeDisciplineChemical & Petroleum Engineering
kusw.oapolicyThis item does not meet KU Open Access policy criteria.

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