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Petrographic, Geochemical, and Geophysical Well Log Assessment of the Precambrian Basement in Eastern Ohio

Gibbs, Eric W.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596650575249807

Abstract Details

2020, Master of Science (MS), Ohio University, Geological Sciences.
This study evaluated the use of geophysical well logs to interpret igneous and metamorphic lithologies from the Precambrian basement in east-central Ohio.Geophysical well logs are a staple of the oil and gas industry, but are designed and calibrated for use in sedimentary rocks. Thin-section petrography and X-ray Fluorescence were used to analyze 13 and 16 basement sidewall core samples, respectively, from two wells in Noble and Coshocton counties. The samples were separated into two broad groups on a standard Quartz-Alkali-Plagioclase plot. The Noble county samples were predominantly syenogranites with minor monzogranite and quartz syenite. The Coshocton county samples were more mafic falling into the tonalite, quartz gabbro/anorthosite, and diorite/anorthosite fields. The responses of a suite of geophysical well logs from both wells were compared to the geochemical data in order to determine whether or not the tool response could identify the different crystalline rocks. Gammaray, bulk density, and photoelectric logs were used due to their distinctive responses in sedimentary rocks. Mann-Whitney nonparametric comparisons of well responses showed that the gamma-ray and bulk density responses could delineate lithologies whereas the photoelectric log values could not.
Daniel Hembree (Advisor)
Katherine Fornash (Committee Member)
Keith Milam (Committee Member)
118 p.
Geochemistry; Geological; Geology; Geophysical; Geophysics; Mineralogy; Petroleum Geology; Petroleum Production; Petrology
Geochemical; Geophysical; Well Logs; Petrographic; Ohio; Basement

Recommended Citations

Citations

  • Gibbs, E. W. (2020). Petrographic, Geochemical, and Geophysical Well Log Assessment of the Precambrian Basement in Eastern Ohio [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596650575249807

    APA Style (7th edition)

  • Gibbs, Eric. Petrographic, Geochemical, and Geophysical Well Log Assessment of the Precambrian Basement in Eastern Ohio. 2020. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596650575249807.

    MLA Style (8th edition)

  • Gibbs, Eric. "Petrographic, Geochemical, and Geophysical Well Log Assessment of the Precambrian Basement in Eastern Ohio." Master's thesis, Ohio University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596650575249807

    Chicago Manual of Style (17th edition)

ohiou1596650575249807
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This open access ETD is published by Ohio University and OhioLINK.