Title:
METHOD AND APPARATUS FOR DETECTING OVERPRESSURED ZONE AHEAD OF A DRILL BIT USING RESISTIVITY AND SEISMIC MEASUREMENTS
Document Type and Number:
WIPO Patent Application WO2007022116
Kind Code:
B1
Abstract:
A resistivity logging tool suitable for downhole use includes a transmitter and two spaced apart receivers. The measured signals are inverted to determine the distance to an overpressured zone in the earth formation. The overpressured zone may be a transition zone in resistivity. The direction of drilling may be controlled based on the determined distance. Optionally, seismic-while drilling measurements may be made from which a separate estimate of the distance can be obtained. The SWD® measurements may also be processed to estimate the pore pressure.
Inventors:
WANG TSILI (US)
GEORGI DANIEL T (US)
PHILLIPS MICHAEL H (US)
VAN WIJK EDUARD H (FR)
FULDA CHRISTIAN (DE)
GEORGI DANIEL T (US)
PHILLIPS MICHAEL H (US)
VAN WIJK EDUARD H (FR)
FULDA CHRISTIAN (DE)
Application Number:
PCT/US2006/031706
Publication Date:
April 12, 2007
Filing Date:
August 15, 2006
Export Citation:
Assignee:
BAKER HUGHES INCOPORATED (US)
WANG TSILI (US)
GEORGI DANIEL T (US)
PHILLIPS MICHAEL H (US)
VAN WIJK EDUARD H (FR)
FULDA CHRISTIAN (DE)
WANG TSILI (US)
GEORGI DANIEL T (US)
PHILLIPS MICHAEL H (US)
VAN WIJK EDUARD H (FR)
FULDA CHRISTIAN (DE)
International Classes:
G01V3/30; G01V11/00
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