Identification of Oil Reservoir Meeting Atypical Archie Phenomenon

Shixiong Yuan1, 2, 3, Haimin Guo1, 2, Yu Ding1, 2, Rui Deng1, 2, *
1 Key lab of Exploration Technologies for Oil and Gas Resources, Ministry of Education (Yangtze University), Wuhan 430100, P.R. China;
2 School of Geophysics and Oil Resources, Yangtze University, Wuhan 430100, P.R. China;
3 Teaching Affairs Office, Yangtze University, Jingzhou 434023, P.R. China

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© 2015 Deng et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: * Address correspondence to this author at the School of Geophysics and Oil Resources, Yangtze University, No. 111 Daxue Road, Caidian District, Wuhan 430100, P.R. China; Tel: 18627807056; E-mail:


According to core data, this paper studies variation of resistivity in different pore structures and wettability conditions. The results show that with the increase of pore structure index m, the resistivity will increase significantly when the saturation is constant. Similarly, with increasing saturation index n, the resistivity will also increase even with the same saturation. With fixed m and n, the calculated formation water saturation will be very high, resulting in hydrocarbon reservoir being ignored. This variation characteristic is significant for the identification of hidden reservoir with atypical Archie formula.

Keywords: Atypical archie phenomenon, Pore structure index, Saturation index, Wettability, Reservoir conductivity..