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US07031839B2 Multi-frequency focusing for MWD resistivity tools 有权
MWD电阻率工具的多频聚焦

Multi-frequency focusing for MWD resistivity tools
摘要:
An induction logging tool is used on a MWD bottom hole assembly. Due to the finite, nonzero, conductivity of the mandrel, conventional multi frequency focusing (MFF) does not work. A correction is made to the induction logging data to give measurements simulating a perfectly conducting mandrel. MFF can then be applied to the corrected data to give formation resistivities.
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