Characterization of a Coalesced, Collapsed Paleocave Reservoir Analog Using GPR and Well-Core Data

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dc.contributor.authorMcMechan, George A.en_US
dc.contributor.authorLoucks, R. G.en_US
dc.contributor.authorMescher, P.en_US
dc.contributor.authorZeng, Xiaoxianen_US
dc.contributor.utdAuthorMcMechan, George A.en_US
dc.contributor.utdAuthorZeng, Xiaoxianen_US
dc.date.accessioned2018-08-31T14:57:33Z
dc.date.available2018-08-31T14:57:33Z
dc.date.created2002-07
dc.date.issued2002-07en_US
dc.description.abstractThe three-dimensional architecture, spatial complexity, and pore-type distribution are mapped in a near-surface analog of a coalesced, collapsed paleocave system in the Lower Ordovician Ellenburger Group near the city of Marble Falls in central Texas. The surface area of the site has dimensions of about 350 × 1000 m. The data collected include about 12 km of 50-MHz ground-penetrating radar (GPR) data arranged in a grid of orthogonal lines, 29 cores of about 15-m length, and detailed facies maps of an adjacent quarry face. Electrical property measurements along with detailed core descriptions were the basis of integrated interpretation of the GPR data. Three main GPR facies are defined on the basis of degree of brecciation in the corresponding cores: undisturbed host rock, disturbed host rock, and paleocave breccia. This GPR facies division defined the major paleocave trends and the distribution of porosity types, which correlate with reservoir quality. Highly brecciated zones are separated by disturbed and undisturbed host rock. The breccia bodies that outline the trend of collapsed cave passages are up to 300 m wide: the intervening intact areas between breccias are up to 200 m wide. Understanding the breccia distribution in a reservoir analog will help in defining strategies for efficient development of coalesced, collapsed paleocave reservoirs.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.description.departmentCenter for Lithospheric Studiesen_US
dc.description.sponsorshipThe project was administered through the Gas Research Institute under Contract 5097-210-3889.en_US
dc.identifier.bibliographicCitationMcMechan, G. A., R. G. Loucks, P. Mescher, and X. Zeng. 2017. "Characterization of a coalesced, collapsed paleocave reservoir analog using GPR and well-core data." Geophysics 67(4): 1148-1158.en_US
dc.identifier.issn0016-8033en_US
dc.identifier.issue4en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/6035
dc.identifier.volume67en_US
dc.language.isoenen_US
dc.publisherSociety of Exploration Geophysicistsen_US
dc.relation.urihttp://dx.doi.org/10.1190/1.1500376
dc.rights©2002 Society of Exploration Geophysicists. All rights reserved.en_US
dc.sourceGeophysics
dc.subjectCorrelation (Statistics)en_US
dc.subjectGeology—Mapsen_US
dc.subjectHydrocarbon reservoirsen_US
dc.subjectPorosityen_US
dc.subjectGeophysicsen_US
dc.subjectStructural failuresen_US
dc.subjectGround penetrating radaren_US
dc.subjectUnited States—Texasen_US
dc.titleCharacterization of a Coalesced, Collapsed Paleocave Reservoir Analog Using GPR and Well-Core Dataen_US
dc.type.genrearticleen_US

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