Mohammed Doghmi

US Patent:

20020165670, Nov 7, 2002

Filed:

May 2, 2001

Appl. No.:

09/847501

Inventors:

Darwin Ellis - Ridgefield CT, US
Mohammed Doghmi - Metairie LA, US

International Classification:

G01V005/04

US Classification:

702/008000

Abstract:

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.