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ELECTRON PARAMAGNETIC RESONANCE (EPR) TECHNIQUES AND APPARATUS FOR PERFORMING EPR SPECTROSCOPY ON A FLOWING FLUID
ELECTRON PARAMAGNETIC RESONANCE (EPR) TECHNIQUES AND APPARATUS FOR PERFORMING EPR SPECTROSCOPY ON A FLOWING FLUID
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机译:在流动流体上进行EPR光谱的电子顺磁共振(EPR)技术和装置
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摘要
Certain aspects of the present disclosure provide methods and apparatus for performing electron paramagnetic resonance (EPR) spectroscopy on a fluid from a flowing well, such as fluid from hydrocarbon recovery operations flowing in a downhole tubular, wellhead, or pipeline. One example method generally includes, for a first EPR iteration, performing a first frequency sweep of discrete electromagnetic frequencies on a cavity containing the fluid; determining first parameter values of reflected signals from the first frequency sweep; selecting a first discrete frequency corresponding to one of the first parameter values that is less than a threshold value; activating a first electromagnetic field in the fluid at the first discrete frequency; and while the first electromagnetic field is activated, performing a first DC magnetic field sweep to generate a first EPR spectrum.
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