Title:
METHOD AND APPARATUS FOR FORMATION EVALUATION AND BOREHOLE SIZE DETERMINATION
Document Type and Number:
WIPO Patent Application WO2007041516
Kind Code:
B1
Abstract:
The quality factor of a NMR-antenna depends upon mud conductivity, formation resistivity and the borehole size. The Q of the antenna is measured. From measurement of one of formation conductivity or borehole size, the other can be determined.
Inventors:
CHEN SONGHUA (US)
KRUSPE THOMAS (DE)
BLANZ MARTIN (DE)
THERN HOLGER F (DE)
EDWARDS CARL M (US)
BEARD DAVID R (US)
KRUSPE THOMAS (DE)
BLANZ MARTIN (DE)
THERN HOLGER F (DE)
EDWARDS CARL M (US)
BEARD DAVID R (US)
Application Number:
PCT/US2006/038493
Publication Date:
January 24, 2008
Filing Date:
October 02, 2006
Export Citation:
Assignee:
BAKER HUGHES INC (US)
CHEN SONGHUA (US)
KRUSPE THOMAS (DE)
BLANZ MARTIN (DE)
THERN HOLGER F (DE)
EDWARDS CARL M (US)
BEARD DAVID R (US)
CHEN SONGHUA (US)
KRUSPE THOMAS (DE)
BLANZ MARTIN (DE)
THERN HOLGER F (DE)
EDWARDS CARL M (US)
BEARD DAVID R (US)
International Classes:
G01V3/30; E21B47/08; G01V3/32
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