Enhancing Inflow Rates of Wells during Oil-Field Development
M. V. Kurlenya1, V. I. Pen'kovsky2, A. V. Savchenko1, D. S. Evstigneev1, N. K. Korsakova2
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
2Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: Нефтяная залежь, импульсы давления, двухфазная фильтрация, призабойная зона, колебания жидкости, Oil reservoir, pressure pulses, two-phase flow, wellbore zone, water level fluctuation
Abstract
The problem of oil flow in model reservoir is solved at the preset harmonic time variations in differential pressure at the model sides. Hysteresis effects of capillary pressure upon the change in direction of fluid expulsion are considered. The influence of water level fluctuations on removal of possible capillary blockage by water from wellbore zone is estimated. The action of alternating pressure pulses on oil-filled formation is analyzed. It is shown that harmonic change of water pressure promotes removal of immobile water blocked in capillaries from wellbore zone. The results of full-scale experiments on wave action on wellbore zone and oil recovery enhancement are presented.
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