Methods and apparatus for oil sample analysis using J-edit nuclear magnetic resonance
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United States of America Patent
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Jan 9, 2018
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Jan 7, 2014
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Jan 7, 2014
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Abstract
A hydrocarbon sample is subjected to a chemically selective J-editing nuclear magnetic resonance (NMR) pulse sequence. Resulting signals are analyzed in order to identify a coupling frequency present in at least one molecule of the hydrocarbon sample. A J-coupling frequency of approximately 150 Hz is indicative of a component having an internal double bonded carbon atom (i.e., an olefin). The presence of an olefin in a hydrocarbon sample can be indicative of the presence of a synthetic based mud (SBM) in the sample.
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