Downhole sensing for electromagnetic telemetry
A method for recovering data from a downhole tool in a wellbore includes measuring an electromagnetic signal using first and second sensors. At least a portion of the electromagnetic signal is transmitted by a downhole tool positioned in a first wellbore. The first and second sensors are each positioned at a different location along a length of a second wellbore. The electromagnetic signal measured by the first and second sensors is decoded to recover a property measured by the downhole tool.
SCHLUMBERGER TECHNOLOGY CORPORATION
G H G E E E E E
G01V H01Q G01V E21B E21B E21B E21B E21B
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Gaelle Dean Jiuping Liang Luis Eduardo Robert
Jannin Homan Chen Sun DePavia Tennent