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Title: Geochemical Study on Hydrocarbon Gases in Seafloor Sediments, Southwestern Offshore Taiwan--Implications in the Potential Occurrence of Gas Hydrates
Authors: Jung-Nan Oung;Chen-Ying Lee;Chao-Shing Lee;Cheng-Lung Kuo
Contributors: NTOU:Institute of Applied Geosciences
Keywords: Hydrocarbon gas;Gas hydrate;Headspace gas analysis;Southwestern offshore Taiwan
Date: 2006-12
Issue Date: 2011-10-20T08:18:34Z
Publisher: TAO
Abstract: abstract:Seafloor sediment samples collected from southwestern offshore Taiwan have been analyzed for hydrocarbon gases resident in samples by using the technique of headspace gas analysis. The results reveal that the gas content is in tens to thousands ppm (vol. in wet sediments). Both microbial gas (usually called biogenic gas) dominated with methane and thermogenic gas containing C2 + hydrocarbons were detected, inferring that the gases involved in the potential gas hydrate occurrence in the study area may have
multiple origins. The microbial gas generated by methanogenic archaea in immature sediments is more widely distributed than thermogenic gas generated in sediments of the catagenesis stage. The presence of thermogenic gas infers an effective petroleum system, which may favor the formation of
gas hydrate as well as for oil and gas xploration.
Relation: 17(4), pp.921-931
URI: http://ntour.ntou.edu.tw/handle/987654321/24962
Appears in Collections:[應用地球科學研究所] 期刊論文

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