Wellbore caliper measurement method using measurements from...

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E - Fixed Constructions

21

B

E21B 47/00 (2006.01) E21B 47/08 (2006.01) G01V 5/04 (2006.01) G01V 5/12 (2006.01)

Patent

CA 2381922

Methods are disclosed for determining the standoff of a well logging instrument from the wall of a wellbore and the shape of the wellbore itself. The methods include measuring a compensated gamma-gamma formation density at a rotary orientation proximate a bottom of the wellbore, and measuring an apparent density at at least one other rotary orientation. The apparent density is related to the compensated density, a density of a fluid disposed between the logging instrument and a wall of the wellbore, and the standoff. Repeated measurements at a plurality of axial positions along the wellbore provide a log of the wellbore.

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