Method for Determining Drilling Fluid Induced Fractures
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United States of America Patent
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Issued Date -
Oct 6, 2016
app pub date -
Mar 30, 2015
filing date -
Mar 30, 2015
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Abstract
A tool is for use in a borehole during drilling with a drilling fluid circulating in the borehole. The tool may include a housing, a plurality of spaced apart radio frequency (RF) transmitters carried by the housing, spaced apart RF receivers carried by the housing, and a controller to communicate with the plurality of transmitters and the receivers. The controller may, at a given depth within the borehole, determine attenuation resistivity measurements and phase-shift resistivity measurements both corresponding to different radial distances from the borehole. The controller may also determine when a fracture has occurred in the geological formation at the given depth allowing the drilling fluid to intrude into the geological formation based upon the attenuation resistivity measurements and the phase-shift resistivity measurements.
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