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PIERS Online
Vol. 3
No. 8
2007
pp: 1334-1339Impulse Response of Seafloor Hydrocarbon Reservoir ModelJing-Tian Tang and Weibin Luo doi:10.2529/PIERS070504082834 Downloads: 1024 Abstract:The step response and impulse response to horizontal electric dipole (HED) source in three typical models such as uniform earth half space, marine double half space and four-layer reservoir-bearing seafloor models were computed, through the use of Gaver-Stehfest inverse Laplace transforms and numerical integration Hankel transforms. And concept of transient impulse time was proposed. It was confirmed that the transient impulse time of the conductive medium to HED can directly indicate the conductivity of the earth. Inline dipole-dipole transient EM sounds with geometry, and it is suitable for surveying with multi offsets. For the high resolution to thin resistive subsurface formations, this method can be applied for hydrocarbons explorations on land, also in marine.References:1. Um, E. S. and D. L. Alumbaugh, "On the physics of the marine controlled-source electromagnetic method," Geophysics, Vol. 72, No. 2, WA13-WA26, 2007. 2. Constable, S. and C. J. Weiss, "Mapping thin resistors and hydrocarbons with marine EM methods: Insights from 1D modeling," Geophysics, Vol. 72, No. 2, G43-G51, 2006. 3. Constable, S. and L. J. Srnka, "An introduction to marine controlled-source electromagnetic methods for hydrocarbon exploration," Geophysics, Vol. 72, No. 2, WA3-WA12, 2007. 4. Edwards, N., "Marine controlled source electromagnetics: Principles, methodologies, future commercial applications," Surveys in Geophysics, No. 26, 675-700, 2005. 5. Edwards, R. N. and A. D. Chave, "A transient electric dipole-dipole method for mapping the conductivity of the sea floor," Geophysics, Vol. 51, No. 4, 984-987, 1986. 6. Edwards, R. N., "On the resource evaluation of marine gas hydrate deposits using sea-floor transient electric dipole-dipole methods," Geophysics, Vol. 62, No. 1, 63-74, 1997. 7. Cheesman, S. J., R. N. Edwards, and A. D. Chave, "On the theory of sea-floor conductivity mapping using transient electromagnetic systems," Geophysics, Vol. 52, No. 2, 204-217, 1987. 8. MacGregor, L. and M. Sinha, "Use of marine controlled-source electromagnetic sounding for sub-basalt exploration," Geophysical Prospecting, No. 48, 1091-1106, 2000. 9. Kaufman, A. A. and G. V. Keller, Electromagnetic Sounding in Frequency Domain and Time Domain, (in Chinese), Geology Press, Beijing, 1987. |
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