Neftyanaya Provintsiya 


Impact of wettability recovery on electrical properties of the Lower Vendian carbonate rocks in East Siberia

A.M. Fadeev

DOI: https://doi.org/10.25689/NP.2020.4.120-128


Download article



Surface characteristics of rocks largely influences the estimates of oil saturation factor, displacement efficiency, and relative permeabilities. In in-situ systems, the wettability can change from hydrophilic to hydrophobic depending on the interaction between fluid (brine and oil) and pore surface. The paper shows the influence of extraction and the following stages of samples’ preparation for wettability recovery on electrical properties of carbonate rocks. Following exposure of samples to pressure and temperature, the pore space surface tends to be more hydrophobic, resistivity increases, and petrophysical relations between resistivity index and water saturation factor change.

Key words:

reservoir, wettability, porosity, water saturation, oil saturation, resistivity, formation resistivity factor, resistivity index, petrophysical equations



  1. Dobrynin V.M., Vendelshtein B.Yu., Kozhevnikov D.A. Petrofizika [Rock Physics]. Moscow: Nedra Publ., 1991. 368 p. (in Russian)

  2. Rezvanov R.A. Nekotorye mify v karotazhe [Myths in well logging]. Geofizika, 2004. Special issue. pp. 52-56 (in Russian)

  3. Akbar M., Petricola M., Watfa M., Badri M., Charara M., Boyd A., Cassell B., Nurmi R., Delhomme J.-R., Grace M., Kenyon W., Roestenburg J. Classic interpretation problems: evaluating carbonates. Schlumberger Oilfield Review, H. Edmundson, Ed., 1995. 7. No 1. P. 38-57.

  4. Sen P.N. Resistivity of partially saturated carbonate rock with microporosity //Geophysics, 1997. Vol/ 62. № 2. P.415-425.

  5. Anderson W.G. Effect of wettability on the electrical properties of porous media //J. Pet. Tech., Dec. 1986. P.1371-1378.

  6. Efimov V.A., Malshakov A.V., Romanov E.A., Mordvintsev M.A., Rogozhnev O.V. Obosnovanie koefficienta neftenasyshchennosti na osnove izucheniya kerna i dannykh geofizicheskikh issledovanii skvazhin [Justification of oil saturation factor based on core analysis and well logging data]. Neftyanoe Khozyaistvo, 2005, No. 5. pp. 41-43 (in Russian).


A.M. Fadeev, PhD (Phys.-Math.), Expert in Petrophysics, Analytics of Core and PVT Analysis Department, Core Analysis Centre, LLC «Tyumen Petroleum Research Center»

42, M. Gorky st., Tyumen, 625002, Russian Federation

E-mail: AMFadeev@tnnc.rosneft.ru

For citation:

A.M. Fadeev Vlijanie vosstanovlenija smachivaemosti na jelektricheskie svojstva karbonatnyh porod nizhnevendskih otlozhenij Vostochnoj Sibiri [Impact of wettability recovery on electrical properties of the Lower Vendian carbonate rocks in East Siberia]. Neftyanaya Provintsiya, No. 4(24), 2020. pp.120-128. DOI https://doi.org/10.25689/NP.2020.4.120-128 (in Russian)


   © A.M. Fadeev, 2020

       This is an open access article under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)