Sedimentary environment indicators: Benzothiazole and its derivatives
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Benzothiazoles distributional characteristics of crude oils and non-hydrocarbon fractions of source rocks in Mangya depression of the Qaidam Basin, Lunnan oil field in the Tarim Basin, Kelamayi oil field in the Junggar Basin and the Tulufan Basin oil field were analyzed. It was found that the distributions of benzothiazole are remarkable diversity in different sedimentary environmental oils. The swamp crude oils contain high quantity of benzothiazole and relatively high quantity of alkylthio-benzothiazole and 2(3H)-benzothiazolone. But the quantity of the 2,2′-dithiobisbenzothiazole is relatively low. The abundance of benzothiazole and 2,2′-dithiobis-benzothiazole are relatively high in semi-brackish water lacustrine crude oils, but the quantity of alkylthio-benzothiazole and 2(3H)-benzothiazolone are relatively low. The benzothiazoles belong to weak acid and mild base compound, and their stabilization conditions relate to their environmental medium. The nitrogenous bases are in favor of alkalescence environment, while weak acid nitrogenous compounds are the main stable products under the weak acid environment. Benzothiazoles have great significance in identifying the oil- and gas-formed environment and the geochemistry study of non-hydrocarbon fraction in the future.
Keywordscrude oils source rock non-hydrocarbon fraction benzothiazoles sedimentary environment
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- 2.Li, M., Larter, S. R., Frolov, Y. B., Adsorptive interactions between organic nitrogen compounds in petroleum and organic/ mineral phase as models for compositional fractionation of pyrrolic nitrogen compounds during petroleum migration, Journal of High Resolution Chromatography, 1994, 17: 230.CrossRefGoogle Scholar
- 3.Clegg, H., Wilkes, H., Santamaria-Orozco, D. et al., Influence of maturity on carbazole and benzocarbazole distributions in crude oils and source rocks from the Sonda de Compeche, Gulf of Mexico (eds. Horsfield, B., Radke, M., Schaefer, R. G.), Advances in Organic Geochemistry, 1997, Organic Geochemistry, 1998a, 29: 183.Google Scholar
- 5.Harrison, E., Telnaes, N., Withelms, A. et al., Maturity controls on carbazole distributions in coals and source rocks, Abstracts of the 18th International Meeting on Organic Geochemistry, Maastricht, 1997, 235–236.Google Scholar
- 6.Huang Xingzhen, Yang Xiaorong, Shao Hongshun et al., Semi-brackish saline water lacustrine carbonate sedimentary models—a case study of Tertiary strata in the Qaidam Basin, Research Annals, Biogeochemistry Opening Lab of Lanzhou Geological Institute of the CAS (in Chinese), Beijing: Science Press, 1988–1989, 125–132.Google Scholar
- 7.Yang Wanli, Estimation of Hydrocarbon Rock of Chinese Basins Containing Oil and Gas (in Chinese), Beijing: Petroleum Industry Publishing House, 1989, 373–386, 421–437, 484–500.Google Scholar
- 8.Metzger, J. V., Thiazoles and Their Benzo Derivatives, Comprehensive Heterocyclic Chemistry, Oxford: Pergamon Press, 1984, 16(4B), 307.Google Scholar