NANOSECOND ELECTROMAGNETIC SOUNDING OF A FLUID-SATURATED LAYERED FORMATION
M.I. Epova, V.L. Mironov b , S.A. Komarov b , K.V. Muzalevsky c
a Institute of Petroleum Geology and Geophysics, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
b Institute of Physics, Siberian Branch of the RAS, 50, str. 38, Akademgorodok, Krasnoyarsk, 660036, Russia
c Altai State University, 61 ul. Lenina, Barnaul, 656049, Russia
Keywords: Horizontal well; fluid-saturated formation; complex permittivity; dispersive media; refractive dielectric model; broadband pulse; Green's function; simulation
Pages: 1054-1060
Abstract
Mathematical modeling was applied to study attenuation of a nanosecond pulse that propagated in an oil-bearing formation and was reflected from the oil-gas or oil-water interfaces. The problem was formulated and solved for propagation of a short electromagnetic Gaussian pulse in a layered hydrocarbon reservoir in the case of excitation by a long electric line. Complex permittivity of oil-bearing rocks was calculated using a refractive mixing dielectric model for oil, saline water, methane, quartz, and bentonite in each layer. We obtained and analyzed space-time diagrams of wave propagation and reflection and estimated effective attenuation for both cases.
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