Thermoreversible Gels and Temperature Triggered Kinetically Controlled Gels for Oilfield Applications

dc.contributor.advisorSharma, Mukul Mani
dc.creatorNasakul, Siree
dc.date.accessioned2020-04-16T01:38:52Z
dc.date.available2020-04-16T01:38:52Z
dc.date.issued2000-05
dc.description.abstractPolymer gels have been extensively used in oil and gas wells. In this dissertation we explore the use of novel thennoreversible gels and temperature triggered kinetically controlled gels for application in water shutoff, gravel packing and fracturing. Thermoreversible gels consisting of block copolymer surfactants have the unique property of forming a gel between a certain temperature range. The range of gelation temperatures can be controlled by varying the surfactant concentration, molecular weight, hydrophobicity and functional groups. The gelation is reversible and both the lower and upper gelation temperatures are sharp phase transitions. Gelation and rheological properties of a range of Pluronic and Tetronic surfactants are investigated. Core flow experiments are conducted to show that gels can be used to reversibly reduce the permeability of cores. The gels will find likely applications in fracturing and gravel packing. Temperature triggered kinetically controlled gels have been synthesized primarily from crosslinked functionalized PEGs and Pluronics. The gelation times and gel properties can be varied based on the molecular weight, functional groups, and degree of crosslinking of gels synthesized. Gelation kinetics are controlled by monomer concentration, monomer type, initiator concentration, initiator type, pH and temperature. Some gels formed are found to be hard and swell in the presence of water to several times their weights as well as being stable for extended period of time. Such gels will find applications in water shutoff treatments. Other gel systems have been formulated to degrade rapidly with time. The swelling and degelation of such gels have been investigated in detail. It is found that the use of crosslinked PEGs and Pluronics provide a family of gels that will find likely application in water shutoff treatments. Thermoreversible gels such as those from Pluronics and Tetronics can find applications in fracturing and gravel packing applications. Core flow experiments performed to evaluate these gels at reservoir conditions indicate the suitability of these gel systems for these applications.en_US
dc.description.departmentPetroleum and Geosystems Engineeringen_US
dc.format.mediumelectronicen_US
dc.identifier.urihttps://hdl.handle.net/2152/80675
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/7691
dc.language.isoengen_US
dc.relation.ispartofUT Electronic Theses and Dissertationsen_US
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_US
dc.rights.restrictionRestricteden_US
dc.subjectPolymer gelen_US
dc.subjectOilfield applicationen_US
dc.titleThermoreversible Gels and Temperature Triggered Kinetically Controlled Gels for Oilfield Applicationsen_US
dc.typeThesisen_US
dc.type.genreThesisen_US
thesis.degree.departmentPetroleum and Geosystems Engineeringen_US
thesis.degree.disciplinePetroleum Engineeringen_US
thesis.degree.grantorUniversity of Texas at Austinen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US

Access full-text files

Original bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Dissertation.2000.Nasakul_Siree.pdf
Size:
6.09 MB
Format:
Adobe Portable Document Format
Description:

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.64 KB
Format:
Item-specific license agreed upon to submission
Description: