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Magnetic enhancement caused by hydrocarbon migration in the Mawangmiao Oil Field, Jianghan Basin, China

Record type: Article

Magnetic parameters (volume-specific susceptibility ?, and hysteresis parameters and ratios) of 47 samples, collected from an oil-producing well (M36) and a dry well (M46) from the oil-bearing II-You Formation of Paleogene Xingouzui Group in the Mawangmiao Oil Field in China, were measured to address the secondary alteration of iron-bearing minerals associated with hydrocarbon migration. Our results indicated that both ? and magnetization (saturation magnetization Js and saturation isothermal remanent magnetization Jrs) of oil-bearing formation have been dramatically enhanced. Further grain size estimation reveals that the background samples (samples both in M46 and outside the oil-bearing formation in M36) contain coarser-grained magnetic particles (30 ?m) of detrital origin. In contrast, the alteration of hydrocarbon produces finer-grained (25 nm) magnetic particles. The new constraints on grain sizes and its origin of the hydrocarbon-related magnetic particles improve our understanding of the mechanism of formation of these secondary finer-grained particles, even though the precise nature of this process is still unknown.

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Citation

Liu, Q.S., Liu, Q-S., Chan, L.S., Yang, T., Xia, X.H. and Cheng, T.J. (2006) Magnetic enhancement caused by hydrocarbon migration in the Mawangmiao Oil Field, Jianghan Basin, China Journal of Petroleum Science and Engineering, 53, (1-2), pp. 25-33. (doi:10.1016/j.petrol.2006.01.010).

More information

Published date: August 2006
Keywords: Rock magnetism, Hydrocarbon alteration, Mawangmiao Oil Field, China

Identifiers

Local EPrints ID: 49744
URI: http://eprints.soton.ac.uk/id/eprint/49744
ISSN: 0920-4105
PURE UUID: d41a02be-9567-4e40-81b2-4549c6e380fd

Catalogue record

Date deposited: 27 Nov 2007
Last modified: 17 Jul 2017 14:55

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Contributors

Author: Q.S. Liu
Author: Q-S. Liu
Author: L.S. Chan
Author: T. Yang
Author: X.H. Xia
Author: T.J. Cheng

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