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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Combination of Comprehensive 2D Gas Chromatography and High Resolution Mass Spectrometry Applied to Analysis of Oils Sourced from Different Shale Facies in the Molecular Level

2014년 8월 19일 00시 15분 03초
ANAL.P-496 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 15일 (수요일) 16:00~19:00
저자 및
조윤주, 김성환*
경북대학교 화학과, Korea
Unconventional petroleum reservoirs often contain multiple productive intervals with differing lithofacies that reflect changes in the depositional environment through time. These changes lead to variations in source rock character and other factors in the reservoir relevant to the properties of the petroleum generated and its production. Lithofacies variations can be determined from well log data and through visual assessment or geochemical analysis of core and outcrop rocks. Petroleum chemical characteristics are also known to vary with source rock properties; therefore, interpretation of oil geochemistry can be used to obtain information on the nature of the source rocks in a particular reservoir. In this study, molecular level characterization was performed by combination of comprehensive 2D gas chromatography and positive-mode atmospheric photoionization Fourier transform ion cyclotron resonance mass spectrometry on oils produced from different lithofacies within the lacustrine Green River Formation in the Uinta Basin of Utah, USA. These source rocks include the Mahogany zone oil shale, the Black Shale facies and the informal Uteland Butte member. The Mahogany zone and Black Shale were deposited during periods when the lake was more saline while the Uteland Butte was deposited during an earlier time when the lake was fresher. Significant differences in chemical composition were observed between oils obtained from different wells and these differences are consistent with other analyses indicating which of the three source rock lithofacies each originated oil. Our results show that the combination of multidimensional gas chromatography and ultrahigh resolution mass spectrometry provides a more complete assessment of oil constituent compounds over a wide mass range (50 < m/z < 1100).