Magnetic enhancement caused by hydrocarbon migration in the Mawangmiao Oil Field, Jianghan Basin, China
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), 25-33. (doi:10.1016/j.petrol.2006.01.010).
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Description/Abstract
Magnetic parameters (volume-specific susceptibility κ, 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 κ 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 μm) 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.
| Item Type: | Article |
|---|---|
| ISSNs: | 0920-4105 (print) |
| Related URLs: | |
| Keywords: | Rock magnetism; Hydrocarbon alteration; Mawangmiao Oil Field, China |
| Subjects: | Q Science > QE Geology |
| Divisions: | University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES) |
| Item ID: | 49744 |
| Date Deposited: | 27 Nov 2007 |
| Last Modified: | 01 Jun 2011 16:52 |
| Contributors: | Liu, Q.S. (Author) Liu, Q-S. (Author) Chan, L.S. (Author) Yang, T. (Author) Xia, X.H. (Author) Cheng, T.J. (Author) |
| Date: | August 2006 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/49744 |
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