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The pdf file of this paper is in Russian. A new set of data is proposed regarding change of residual oil saturation in oil reservoir with long production history under water injection with fresh water. Under the circumstances the injected water is getting mixed with higher salinity reservoir water in rock pore space. As a result the amount of connate water in rock pores is increasing while dynamic change of adsorbtion process parameters is taking place. This behavior is evaluated by well logging data in wells drilled within a period of 50 years oilfield production history. Theoretical background of the event is given that will help to optimize oil displacement and production in reservoirs.
afana, connate water, enhanced recovery, karotazhnik, log analysis, mestorozhdeniy, Moscow, new experimental data, oil reservoir, Pashiskiy horizon, pore space, production history, Publ, reserves of oil and gas, reservoir production, Russ, terrigenous rock, theoretical explanation, Upstream Oil & Gas, water injection, waterflooding, well logging