Отправлено: 01.07.14 00:28. Заголовок: Обратные задачи ИК в глинистых песчаниках

Forward modeling and inversion of induction logs from shaly sand reservoirs using petrophysical conductivity models
V.N. Glinskikh a,b,*, G.V. Nesterova, M.I. Epov a,b
a
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences,
pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia b
Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
Received 26 November 2013; accepted 26 November 2013
Abstract
Algorithms and software have been designed for petrophysical 2D forward simulation and inversion of induction logs from oil wells drilled
in shaly sandstone using conductivity models for different clay types. As comparative analysis of relative amplitudes and phases of tool
responses has demonstrated, it is possible to reliably and accurately estimate fluid saturation and porosity from induction logs. The applied
2D numerical inversion of both theoretical and well logs yielded quantitative estimates of petrophysical parameters of reservoirs, with clay
volume fraction assumed according to the chosen conductivity model. Correction for the presence of clay improves inversion quality if clay
content as well as type are taken into account.

Russian Geology and Geophysics 55 (2014) 793–799
Геология и геофизика