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Problems of capillary pressure definition in samples of rocks by centrifugation method (part 2)

Authors: A.M. Svalov (Oil and Gas Research Institute of RAS, RF, Moscow)

Key words: capillary pressure, centrifugation method, data processing.

In paper laws of expulsion of wetting fluid from samples of rocks are investigated at centrifugation method application for capillary pressure definition. It is erected, that at a standard centrifugation method achievement of the capillary pressures exceeding one atmosphere is physically impossible. Advancing of the method envisioning increase of initial stress in core holder of a centrifuge is offered. Abundant errors are analyzed at interpretation of centrifugation data and the method raising reliability of treating of these data is tendered.

References
1. Collins R.E., Flow of fluids through porous materials, Tulsa, Oklahoma: Petroleum Publishing-Reinhold, 1961.
2. Tul'bovich B.I., Metody izucheniya porod-kollektorov nefti i gaza (Methods of study of oil and gas reservoir rocks), Moscow: Nedra Publ., 1979, 199 p.
3. Gudok N.S., Bogdanovich N.G., Martynov V.G., Opredelenie fizicheskikh
svoystv neftevodosoderzhashchikh porod (Determination of physical properties of oil-water-bearing rocks), Moscow: Nedra-Biznestsentr Publ., 2007, 592 p.
4. Tiab D., Donaldson E C., Petrophysics: theory and practice of measuring
reservoir rock and fluid transport, Elsevier Inc., 2004, 926 p.
5. Svalov A.M., Problemy dobychi nefti i gaza. Kapillyarnye effekty v podzemnoy gidrodinamike: Novye rezul'taty (Problems of oil and gas production. Capillary effects in underground hydrodynamics: New results), Moscow: Librokom Publ., 2013, 112 p. 

Key words: capillary pressure, centrifugation method, data processing.

In paper laws of expulsion of wetting fluid from samples of rocks are investigated at centrifugation method application for capillary pressure definition. It is erected, that at a standard centrifugation method achievement of the capillary pressures exceeding one atmosphere is physically impossible. Advancing of the method envisioning increase of initial stress in core holder of a centrifuge is offered. Abundant errors are analyzed at interpretation of centrifugation data and the method raising reliability of treating of these data is tendered.

References
1. Collins R.E., Flow of fluids through porous materials, Tulsa, Oklahoma: Petroleum Publishing-Reinhold, 1961.
2. Tul'bovich B.I., Metody izucheniya porod-kollektorov nefti i gaza (Methods of study of oil and gas reservoir rocks), Moscow: Nedra Publ., 1979, 199 p.
3. Gudok N.S., Bogdanovich N.G., Martynov V.G., Opredelenie fizicheskikh
svoystv neftevodosoderzhashchikh porod (Determination of physical properties of oil-water-bearing rocks), Moscow: Nedra-Biznestsentr Publ., 2007, 592 p.
4. Tiab D., Donaldson E C., Petrophysics: theory and practice of measuring
reservoir rock and fluid transport, Elsevier Inc., 2004, 926 p.
5. Svalov A.M., Problemy dobychi nefti i gaza. Kapillyarnye effekty v podzemnoy gidrodinamike: Novye rezul'taty (Problems of oil and gas production. Capillary effects in underground hydrodynamics: New results), Moscow: Librokom Publ., 2013, 112 p. 


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