EFFECTS OF BITUMEN EXTRACTION ON THE 2D NMR RESPONSE OF SATURATED KEROGEN ISOLATES

摘要

There is mounting evidence that 2D T_1-T_2 NMR can be successfully used for fluid typing and saturation in organic shale. More specifically, it has been generally observed that in organic-shale cores the T_1/T_2 ratio is higher for saturating hydrocarbons than for saturating water, which could be exploited as a technique for NMR saturation logging in unconventional organic-shale reservoirs. This paper presents a continuation of a fundamental study into the 2D NMR response of saturating fluids in the organic-matter pores of pelletized kerogen isolates. Working with kerogen isolates avoids any potential complications from saturation history and wettability alterations of as-received organic-shale cores.