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Myles T. Moore Thesis 5.9.2016.pdf (3.49 MB)

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Noble Gas and Hydrocarbon Geochemistry of Coalbed Methane Fields from the Illinois Basin

Moore, Myles Thomas
http://rave.ohiolink.edu/etdc/view?acc_num=osu1462561493

Abstract Details

2016, Master of Science, Ohio State University, Earth Sciences.
Research presented in this thesis investigates the hydrocarbon molecular content, major and noble gas composition, the isotopic composition of noble gases and hydrocarbons, and select dissolved ions of gases and fluids from producing coalbed methane (CBM) wells. Samples were collected from the Illinois Basin in Sullivan County, Indiana. Samples analyzed in this study were compared with previously published data in the Illinois Basin to gain a greater understanding of fundamental fluid systematics and methane formation in coalbed reservoirs. Chapter 1: Conventional geochemical fingerprinting methods of hydrocarbon molecular and isotopic composition were used to determine the genetic source of natural gas in coalbed methane basins. Integration of isotopic and molecular hydrocarbon composition with noble gas geochemistry were used to determine the origin and migration of natural gas in the crust and relative role of coal seam waters and/or exogenous fluids in methane generation. Significant fluxes of exogenous thermogenic methane are observed in this coalbed methane reservoir. Chapter 2: Standard methods that assume steady state modelling and empirical methods for determining the residence time of natural gas and groundwater in coalbed methane fields using radiogenic ingrowth of 4He are compared. Previous age dating methods are corrected by taking into account significantly increased 4He diffusional rates specific to coal seams. By correcting for empirically determined rates of 4He accumulation, the geological time frame on which freshwater recharges into deeper sedimentary sequences, which may play a role in timing in which microbes are injected into coal beds and start to generate methanogenic natural gas, are more accurately constrained.
Thomas Darrah, Dr. (Advisor)
John Olesik, Dr. (Committee Chair)
Frank Schwartz, Dr. (Committee Chair)
167 p.
Chemistry; Earth; Geochemistry; Geology
coalbed methane; stable isotopes; natural gas; fluid migration; noble gases; post-genetic modification; residence time; crustal helium flux; exogenous fluids; thermogenic gas; helium

Recommended Citations

Citations

  • Moore, M. T. (2016). Noble Gas and Hydrocarbon Geochemistry of Coalbed Methane Fields from the Illinois Basin [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1462561493

    APA Style (7th edition)

  • Moore, Myles. Noble Gas and Hydrocarbon Geochemistry of Coalbed Methane Fields from the Illinois Basin. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1462561493.

    MLA Style (8th edition)

  • Moore, Myles. "Noble Gas and Hydrocarbon Geochemistry of Coalbed Methane Fields from the Illinois Basin." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1462561493

    Chicago Manual of Style (17th edition)

osu1462561493
589
© 2016, some rights reserved.Creative Commons License Noble Gas and Hydrocarbon Geochemistry of Coalbed Methane Fields from the Illinois Basin by Myles Thomas Moore is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.