Key words: NMR logging, formation water, drilling fluid filtrate, carbonate reservoirs, Eastern Siberia.
On the core of Rosneft Oil Company’s license areas in Irkutsk Region and Krasnoyarsk Krai there has been performed a wide range of operations for providing petrophysical support of nuclear magnetic logging data interpretation for Vendian and Lower Cambrian carbonate reservoirs, however there is still a number of uncertainties while interpretation of the method. The paper introduces a solution of one of such uncertainties, which is a study of mixture of formation water and drilling fluid filtrate nuclear magnetic resonance properties in the void space of core samples.
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