Influence of water on the formation wettability productive rocks

Authors: A.A. Zlobin (Perm National Research Technical University, RF, Perm)

Key words: statistical analysis core, surface wettability, hydrophobic, hydrophilic, disjoining pressure, ion activity.

On a representative statistical material the author analyzed the influence of formation waters chemical composition on the wettability of the productive rocks. Wettability of the cores was determined by the productive objects OST 39-180-85. To explain the experimental evidence used coagulation DLVO theory. Wettability alteration in the hydrophobic side is due to the destruction of the water film. Stability of the film depends on salinity, pH and the specific activity of positive and negative ions. Found that divalent metal ions and non-chlorine and bromine reduced stability of the water film and the ions are anions may manifest itself as stabilizers, and water layer destructors.

References
1. Buckley J.S., Takamura K, Morrow N.R., Influence of electrical surface
charges on the wetting properties of crude oils, SPE Reservoir Engineering,
1989, V. 4, no. 4, pp. 332-340.
2. Tiab D., Donaldson E.C., Theory and practice of measuring reservoir rock
and fluid transport properties, Gulf Professional Publishing, 2004, 880 p.
3. Zlobin A.A., Neftyanoe khozyaystvo – Oil Industry, 2013, no. 4, pp. 20-24.
4. Deryagin B.V., Churaev N.V., Muller V.M., Poverkhnostnye sily (The surface
forces), Moscow: Nauka Publ., 1985, 300 p.
5. Verwey E.J.W., Overbeek J.Th.G., Theory of the stability of lyophobic colloids, New York – Amsterdam: Elsevier Publ., 1948, 205 p. 

Key words: statistical analysis core, surface wettability, hydrophobic, hydrophilic, disjoining pressure, ion activity.

On a representative statistical material the author analyzed the influence of formation waters chemical composition on the wettability of the productive rocks. Wettability of the cores was determined by the productive objects OST 39-180-85. To explain the experimental evidence used coagulation DLVO theory. Wettability alteration in the hydrophobic side is due to the destruction of the water film. Stability of the film depends on salinity, pH and the specific activity of positive and negative ions. Found that divalent metal ions and non-chlorine and bromine reduced stability of the water film and the ions are anions may manifest itself as stabilizers, and water layer destructors.

References
1. Buckley J.S., Takamura K, Morrow N.R., Influence of electrical surface
charges on the wetting properties of crude oils, SPE Reservoir Engineering,
1989, V. 4, no. 4, pp. 332-340.
2. Tiab D., Donaldson E.C., Theory and practice of measuring reservoir rock
and fluid transport properties, Gulf Professional Publishing, 2004, 880 p.
3. Zlobin A.A., Neftyanoe khozyaystvo – Oil Industry, 2013, no. 4, pp. 20-24.
4. Deryagin B.V., Churaev N.V., Muller V.M., Poverkhnostnye sily (The surface
forces), Moscow: Nauka Publ., 1985, 300 p.
5. Verwey E.J.W., Overbeek J.Th.G., Theory of the stability of lyophobic colloids, New York – Amsterdam: Elsevier Publ., 1948, 205 p. 


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