Abstract
Fifty samples from the source rocks in Member 3 and Member 4 of the Paleogene Shahejie Formation in the Bohai Bay Basin, East China, were analyzed to investigate the distribution, evolution of the molecular maturity ratios C29ββ(ββ+αα) and C2920S/(20S+20R) and their control factors in the natural geological profile and sequence. The results showed that progressive changes in molecular maturity parameters are associated with major changes in thermal evolution of related biomarkers. Increases in the C29ββ/(ββ+αα) and C2920S/(20S+20R) ratios result from the difference in the relative rate between generation and thermal degradation of isomers involved. The samples from a hyper-saline environment below 3.5 km in which evaporitic rocks deposited shows high response of Sr/Ba, Sr/Ca, Fe/Mn, Pr/n-C17, Ph/n-C18 and gammacerane and low response of Pr/Ph. There presents negative reversal of biomarker maturity C29ββ/(ββ+αα), C2920S/(20S+20R) and Ts/(Ts+Tm) in the samples from hypersaline environment, reflecting that the gypsum- halite have negative effect on the isomerization of biomarker and thermal evolution of organic matter. The minerals in evaporites also retard the conventional thermal indicators including vitrinite reflectance (Ro) and pyrolysis peak temperature Tmax at the depth below 3.4 km (i.e. >3.4 km), and these parameters also show the inhibition from overpressure in the range of 2.4–3.4 km. This result will be helpful in the interpretation and application of molecular maturity parameters for similar saline lacustrine basins.
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References
Chen S J. The reversal of maturation parameters relative to C29 sterane. Natural Gas Geoscience. 1997. 8: 28–30 (in Chinese)
Chen Z H and Zha M. Sedimentary characteristics of source rocks in fluctuation from facies. Journal of Lake Science. 2006. 18: 19–25 (in Chinese)
Chen Z H and Zha M. Correlation between inorganic elements and abnormal vitrinite reflectance in the lacustrine source rocks: Taking Niu-38 Well in Dongying Depression as an example. Geochimica. 2007. 36: 275–278 (in Chinese)
Chen Z H and Zha M. Mechanism of overpressured fluid compartment and its controlling on hydrocarbon migration and accumulation in faulted lacustrine basin: A case study from the Dongying Sag, Bohai Bay Basin. Chinese Journal of Geology. 2008. 43: 50–64 (in Chinese)
Chen Z H, Zha M and Jin Q. An investigation on generation and expulsion of hydrocarbon from source rocks of the Shahejie Formation in Well Niu-38, Dongying depression. Chinese Journal of Geology. 2004. 39: 356–366 (in Chinese)
Chen Z H, Zha M and Jin Q. Determining the hydrocarbon expulsion threshold of source rock of Well Niu-38. Natural Gas Industry. 2005. 25: 6–10 (in Chinese)
Chen Z H, Zha M and Jin Q. Mineral elemental response to the evolution of terrestrial faulted-lake basin. Acta Sedementilogica Sinica. 2008. 26: 36–43 (in Chinese)
Chen Z H, Zha M and Jin Q. Response of mineral elements, carbon isotope and hydrocarbon in typical sedimentary system of evaporate and mudstone: a case study of the Dongying Depression, Bohai Bay Basin. Acta Geologica Sinica. 2009. 83: 435–444 (in Chinese)
Dzou L I P, Noble R A. and Senftle J T. Maturation effects on absolute biomarker concentration in a suite of coals and associated vitrinite concentrates. Organic Geochemistry. 1995. 23: 681–697
Farrimond P, Taylor A and Telnæs N. Biomarker maturity parameters: the role of generation and thermal degradation. Org. Geochem. 1998. 29: 1181–1197
Lewan M D, Bjorøy M and Dolcater D L. Effects of thermal maturation on steroid hydrocarbons as determined by hydrous pyrolysis of Phosphoria Retort Shale. Geochimica et Cosmochimica Acta. 1986. 50: 1977–1987
Lewis C A. The kinetics of biomarker reactions: implications for the assessment of the thermal maturity of organic matter in sedimentary basins. In: Organic Geochemistry: Principles and Application (Eds. M. H. Engel and S. A. Macko). 1993. 491–510. New York: Plenum Press
Mackenzie A S. and Mckenzie D. Isomerization and aromatization of hydrocarbons in sedimentary basins formed by extension. Geology Magazine. 1983. 120: 417–470
Mackenzie A S, Patience R L, Maxwell J R, et al. Molecular parameters of maturation in the Toarcian shales, Paris Basin, France: Changes in the configuration of acyclic isoprenoid alkanes, steranes and triterpanes. Geochimica et Cosmochimica Acta. 1980. 44: 709–1721
Peters K E and Moldowan J M. The biomarker Guide: Interpreting Molecular Fossils in Petroleum and Ancient Sediments. New Jersey: Prentice Hall. 1993. 1–88
Peters K E, Moldowan, J M and Sundararaman P. Effects of hydrous pyrolysis on biomarker thermal maturity parameters: Monterey phosphatic and siliceous members. Organic Geochemistry. 1990. 15:249–265
Requejo A G. Maturation of petroleum source rocks: II. Quantitative changes in extractable hydrocarbon content and composition associated with hydrocarbon generation. Organic Geochemistry. 1994. 21: 91–105
Rullkötter J and Marzi R. Natural and artificial maturation of biological markers in a Toarcian shale from northern Germany. Organic Geochemistry. 1988. 13: 639–645
Schwark L, Vliex M and Schaeffer P. Geochemical characterization of Malm Zeta laminated carbonates from the Franconian Alb, SW-Germany. Organic Geochemistry. 1998. 29: 1921–1952.
Seifert W K and Moldowan J M. Use of biological markers in petroleum exploration. In: Methods in Geochemistry and Geophysics, 24 (Ed., R.B. Johns), Amsterdam. 1986. 261–290
Seifert W K and Moldowan J M. Paleoreconstrucation by biological markers. Geohimica et Coschimica Acta. 1981. 45: 783–794
Seifert W K and Moldowan J M. The effect of biodegradation on steranes and terpanes in crude oils. Geochimica et Coschimica Acta. 1979. 43: 111–126
Sinninghe Damsté, J S, Kening F, Koopmans. M P, et al. Evidence for gammacerane as an indicator of water-column stratification. Geochimica et Cosmochimica Acta. 1995. 59: 1895–1900
Strachan M G, Alexander R, Subroto E A, et al. Constraints upon the use of 24-ethylcholestane diastereomer ratios as indicators of the maturity of petroleum. Organic Geochemistry. 1989. 14: 423–432
ten Haven H L, de Leeuw J W, Peakman T M, et al. Anomalies in steroid and hopanoid maturity indices. Geochimica et Cosmochimica Acta. 1986. 50: 853–855
ten Haven H L, de Leeuw J W, RullkÖtter J, et al. Restricted utility of the prestane/phystane ratio as a palaeoenvironment indicator. Nature. 1987. 330: 641–643
Tissot B P and Welte D H. Petroleum Formation and Occurrence. Berlin, Heidelberg, NewYork, Tokyo: Spinger-Verlag. 1984. 59–62
Tuo J C, Huang X Z and Ma W Y. The Laging phenomenon of the petroleum generation in carbonate rocks. Petroleum Exploration and Development. 1994. 21: 1–5 (in Chinese)
Wang G L, Wang T G, Zhang L Y, et al. Anomalies of molecular indicators in Jiyang Eogene source rocks. Geochimica. 2006. 35: 560–566 (in Chinese)
Wang T G. A contribution to some sedimentary environmental biomarkers in crude oils and source rocks in China (in Chinese with English abstract): Geological Review. 2002. 48: 256–262
Wei Z B, Moldowan J M. and Paytan A. Diamondoids and molecular biomarkers generated from modern sediments in the absence and presence of minerals during hydrous pyrolysis. Organic Geochemistry. 2006. 37: 891–911
Xie Q L, Zhou Z Y and Lu M Y. Organic matter enclosed in carbonate minerals — a kind of important hydrocarbon producing matter. Acta Mineralogica Sinica. 2000. 20: 59–62 (in Chinese)
Zhao G Y, Li S Y and Liu L F. A study on characteristics and kinetics of catalytic degradation from kerogen in carbonate rocks. Chinese Journal of Geology. 2005. 40: 47–54 (in Chinese)
Zhu G Y, Jin Q, Dai J X, et al. Investigation on the salt lake source rocks for middle Shasi Column of Dongying Depression. Geological Journal of China Universities. 2004. 10: 257–266 (in Chinese)
Zhu G Y, Jin Q, Zhou J L, et al. Study on the infilling patterns of lacustrine basins in the Dongying Depression. Petroleum Geology and Experiment. 2003. 25: 143–148 (in Chinese)
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Chen, Z., Zha, M., Jin, Q. et al. Distribution of sterane maturity parameters in a lacustrine basin and their control factors: A case study from the Dongying Sag, East China. Pet. Sci. 8, 290–301 (2011). https://doi.org/10.1007/s12182-011-0146-9
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DOI: https://doi.org/10.1007/s12182-011-0146-9