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METHOD AND APPARATUS FOR USING PULSED FIELD GRADIENT NMR MEASUREMENTS TO DETERMINE FLUID PROPERTIES IN A FLUID SAMPLING WELL LOGGING TOOL
METHOD AND APPARATUS FOR USING PULSED FIELD GRADIENT NMR MEASUREMENTS TO DETERMINE FLUID PROPERTIES IN A FLUID SAMPLING WELL LOGGING TOOL
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机译:用脉冲场梯度NMR测量确定流体采样测井工具中流体特性的方法和装置
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摘要
A method for determining a formation fluid property includes acquiring a suite of nuclear magnetic resonance (NMR) measurements of a fluid sample using a pulse sequence that includes pulsed field gradient pulses for encoding diffusion information, wherein each NMR measurement in the suite is acquired with a different value in a parameter in the pulsed field gradient pulses for producing a different diffusion effect, wherein the acquiring is performed in a formation fluid sampling tool in a borehole; inverting the suite of NMR measurements to produce a distribution function that relates diffusion properties of the fluid sample with an NMR property of the fluid sample; and determining the formation fluid property from the distribution function.
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