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dc.contributor.advisorPope, G.A.en
dc.creatorLevitt, David B.en
dc.date.accessioned2015-10-22T21:10:42Zen
dc.date.available2015-10-22T21:10:42Zen
dc.date.issued2006-12en
dc.identifierdoi:10.15781/T28W3Nen
dc.identifier.urihttp://hdl.handle.net/2152/31892en
dc.descriptiontexten
dc.description.abstractAn experimental study was done to evaluate promising EOR surfactants based upon a fast, low-cost laboratory screening process that is highly effective in selecting the best surfactants to use with different crude oils. Initial selection of surfactants was based upon desirable surfactant structures determined from previous surfactant research both at the University of Texas and elsewhere. Phase behavior screening helps to quickly identify favorable surfactant formulations. Salinity scans are conducted to observe equilibration times, microemulsion viscosity, oil and water solubilization ratios and interfacial tension as well as to identify problems with macroemulsions and other undesirable behavior. Co-surfactants and co-solvents are included to minimize gels, liquid crystals and macroemulsions and to promote rapid equilibration to low-viscosity microemulsions. Branched alcohol propoxy sulfates and internal olefin sulfonates have been identified as good EOR surfactants using this screening process. One of the best formulations was tested in both sandstone and dolomite reservoir cores and found to give excellent oil recovery and low surfactant retention. The formulation C16-17[PO]7SO4, C15-18IOS, sec-butanol and FP3330 HPAM polymer when used with a good salinity gradient and good mobility control reduced the residual oil saturation to only about 0.03 in both Berea sandstone and a West Texas dolomite at 38 C. This result indicates that there is a very high potential for surfactant-polymer enhanced oil recovery in carbonate oil reservoirs using the same surfactants as suitable for sandstone oil reservoirs. This is a remarkable and highly significant development in chemical EOR.en
dc.format.mediumelectronicen
dc.language.isoengen
dc.relation.ispartofUT Electronic Theses and Dissertationsen
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subjectEOR surfactantsen
dc.subjectDolomite oil reservoiren
dc.subjectOil recoveryen
dc.titleExperimental evaluation of high performance EOR surfactants for a dolomite oil reservoiren
dc.typeThesisen
dc.description.departmentPetroleum and Geosystems Engineeringen
dc.type.genreThesisen
thesis.degree.departmentPetroleum and Geosystems Engineeringen
thesis.degree.disciplinePetroleum Engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Scienceen
dc.rights.restrictionRestricteden


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