Empirical parameters for the model of countercurrent capillary imbibition in rocks

Category: 15-1
V.L. Barabanov


UDC 532.68


V.L. Barabanov


Institute of Oil and Gas Research RAS, Moscow, Russia


Abstract. The review was carried out of the theoretical models of countercurrent capillary flow of porous media and its experimental tests. The results of the new experiments are discussed. The permeability of test kerns ranges between several D to several hundreds D. The characteristic feature of our experiments was their relatively long duration with regard to traditional tests. It was shown that after rapid decrease of imbibition rate and reaching apparent constant saturation level, imbibition rate increased again and reached the second maximum. The curves of the saturations dependence on time were approximated by power and semi-logarithmic functions. The empirical parameters of these functions were obtained and compared to petrophysical properties of the rocks. 


Keywords: rocks, countercurrent imbibitions, capillarity effects, permeability, porosity, laboratory experiments.



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