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RAPID NMR MULTI-FREQUENCY T1 AND T2 ACQUISITION FOR EARTH FORMATIONS EVALUATION WITH MWD OR WIRELINE TOOLS
RAPID NMR MULTI-FREQUENCY T1 AND T2 ACQUISITION FOR EARTH FORMATIONS EVALUATION WITH MWD OR WIRELINE TOOLS
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机译:用MWD或电线工具对地层评估进行快速NMR多重T1和T2采集
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摘要
Nuclear magnetic resonance measurement of a medium are made using a tool with a static magnetic field having a gradient. Data is acquired from at least three sensitive volumes of the medium using an interleaved sequence of pulses (103, 105, 107) at three different frequencies (f1, f2, f3). At each frequency, a number of sub-sequences of a saturation, a recovery pulse and at least one refocusing pulse are used.
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