PETROPHYSICAL INTERPRETATION OF TIME-LAPSE ELECTROMAGNETIC SOUNDING IN WELLS
I.N. Yeltsova, G.V. Nesterovaa, and A.A. Kashevarovb†
aA.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
bM.A. Lavrent'ev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Lavrent'eva 15, Novosibirsk, 630090, Russia
Keywords: Electromagnetic sounding, time-lapse logging, joint inversion, hydrodynamic simulation, formation reservoir properties
Pages: 668-675
Abstract
Terrigenous reservoirs are studied by a joint analysis of processes of various physical nature. This study is urgent because new methods for formation evaluation (first of all, permeability) from electric and electromagnetic logging data are required. We propose a method for the complex processing and interpretation of time-lapse well logging electromagnetic measurements, which show the dynamics of processes in the well influence zone. The constructed electrohydrodynamic model of the borehole environment is used to estimate the hydrophysical (petrophysical) parameters of the formation.
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