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METHOD AND APPARATUS FOR DETECTING HYDROCARBONS WITH NMR LOGS IN WELLS DRILLED WITH OIL-BASED MUDS
METHOD AND APPARATUS FOR DETECTING HYDROCARBONS WITH NMR LOGS IN WELLS DRILLED WITH OIL-BASED MUDS
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机译:用油基泥浆钻井的NMR测井中烃的检测方法和装置
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摘要
A method and system for estimating native hydrocarbons from oil-based drilling muds with the aid of NMR data. Adaptive echo stacking may be used to balance between precision and sensitivity to changes in the fluid composition. Apparent T2 decay time and effective diffusion constants derived from the NMR data may be transformed into an indication of native hydrocarbon type, using known diffusion constants, fuzzy logic, and neural networks.
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