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     "name": "Molecular and isotopic analyses of the hydrocarbon gases within gas hydrate-bearing rock units of the Prudhoe Bay-Kuparuk River area in northern Alaska",
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     "datePublished": "1992",
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     "abstract": "Gas hydrates, which are crystalline substances of water molecules that\r\nencase gas molecules, have the potential for being a significant source of\r\nnatural gas.  World-wide estimates for the amount of gas contained in\r\nhydrates range from 1.1 x 105 to 2.7 x 108 trillion cubic feet.  Gas\r\nhydrates exist in many Arctic regions, including the North Slope of\r\nAlaska.\r\n\r\nThe two primary objectives of the U.S. Geological Survey Gas Hydrate\r\nResearch Project are (1) to map the distribution of in-situ gas hydrates\r\non the North Slope of Alaska, and (2) to evaluate the geologic parameters\r\nthat control the distribution of these gas hydrates.  To aid in this\r\nstudy, British Petroleum Exploration, ARCO Alaska, Exxon Company USA, and\r\nthe Continental Oil Company allowed the U.S. Geological Survey to collect\r\ngeochemical samples from  drilling North Slope production wells.\r\n\r\nMolecular analysis of gaseous drill cutting and free-flowing gas samples\r\nfrom 10 production wells drilled in the Prudhoe Bay, Kuparuk River, and\r\nMilne Point oil fields indicates that methane is the primary hydrocarbon\r\ngas in the gas hydrate-bearing stratigraphic units.  Isotopic data for\r\nseveral of these rock units indicate that the methane within the inferred\r\ngas hydrate occurences originated from both microbial and thermogenic\r\nprocesses.",
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