Borehole survey method utilizing continuous measurements
AssigneeSchlumberger Technology Corporation
InventorsIchiro Shirasaka, Wayne Phillips, Mauricio Tejada
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Abstract
A borehole survey method is provided for processing continuous measurements of the earth's magnetic and gravitational fields obtained while drilling a borehole. The present invention improves borehole acquisition of targeted geological structures by substantially reducing continuous measurement errors attributable to noise, shock and vibrations from turning the drill bit against rock.
Claims24
A method of surveying a borehole comprising using continuous downhole measurements of the earth's magnetic and gravitational fields obtained while turning a drill bit to deepen the borehole and processing the measurements using windowed median smoothing.
Dependencies are inferred from the claim text.