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dc.contributor.advisorPrasad, Manika
dc.contributor.authorGayer, James L.
dc.date.accessioned2015-10-21T19:29:12Z
dc.date.accessioned2022-02-03T12:50:51Z
dc.date.available2015-10-21T19:29:12Z
dc.date.available2022-02-03T12:50:51Z
dc.date.issued2015
dc.identifierT 7901
dc.identifier.urihttps://hdl.handle.net/11124/20325
dc.description2015 Fall.
dc.descriptionIncludes illustrations (some color), maps (some color).
dc.descriptionIncludes bibliographical references.
dc.description.abstractOil shale samples from the Irati Formation in Brazil were evaluated from an outcrop block, denoted Block 003. The goals of this thesis include: 1) Characterizing the Irati Formation, 2) Comparing the effects of two different types of pyrolysis, anhydrous and hydrous, and 3) Utilizing a variety of geophysical experiments to determine the changes associated with each type of pyrolysis. Primary work included determining total organic carbon, source rock analysis, mineralogy, computer tomography x-ray scans, and scanning electron microscope images before and after pyrolysis, as well as acoustic properties of the samples during pyrolysis. Two types of pyrolysis (hydrous and anhydrous) were performed on samples cored at three different orientations (0°, 45°, and 90°) with respect to the axis of symmetry, requiring six total experiments. During pyrolysis, the overall effective pressure was maintained at 800 psi, and the holding temperature was 365°C. The changes and deformation in the hydrous pyrolysis samples were greater compared to the anhydrous pyrolysis. The velocities gave the best indication of changes occurring during pyrolysis, but it was difficult to maintain the same amplitude and quality of waveforms at higher temperatures. The velocity changes were due to a combination of factors, including thermal deformation of the samples, fracture porosity development, and the release of adsorbed water and bitumen from the sample. Anhydrous pyrolysis in this study did not reduce TOC, while TOC was reduced due to hydrous pyrolysis by 5%, and velocities in the hydrous pyrolysis decreased by up to 30% at 365°C compared to room temperature. Data from this study and future data that can be acquired with the improved high-temperature, high-pressure experiment will assist in future economic production from oil shale at lower temperatures under hydrous pyrolysis conditions.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2010-2019 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectIrati formation
dc.subjectoil shale
dc.subjectrock physics
dc.subjectmaturation
dc.subjectacoustic properties
dc.subjectpyrolysis
dc.titleArtificial maturation of oil shale: the Irati Formation from the Paraná Basin, Brazil
dc.typeText
dc.contributor.committeememberYoung, Terence K.
dc.contributor.committeememberAndrews-Hanna, Jeffrey C.
dc.contributor.committeememberBoak, Jeremy
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineGeophysics
thesis.degree.grantorColorado School of Mines


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