Method for estimating formation dip using combined multiaxial induction and formation image measurements
AssigneeSchlumberger Technology Corporation
InventorsDenis Heliot, Selim Djandji, Pascal Mantran
Life of this patent
Estimating the term…
Abstract
A method for determining dip of rock formations penetrated by a wellbore using multiaxial induction measurements and imaging measurements made from within the wellbore includes estimating dip from the multiaxial induction measurements. Dip is also estimated from the imaging measurements. The dip is determined by combining the induction and imaging measurements.
Claims20
A method for determining a dip of geologic formations penetrated by a wellbore using multiaxial induction measurements and imaging measurements, comprising:
- estimating a first dip from the multiaxial induction measurements;
- estimating a second dip from the imaging measurements;
- and
- determining the dip by combining the first and second dips.
A method for determining a dip of geologic formations penetrated by a wellbore, comprising:
- moving a multiaxial electromagnetic induction instrument along the wellbore to generate multiaxial induction measurements of the formations;
- estimating a first dip from the multiaxial induction measurements;
- moving a wellbore imaging instrument along the wellbore to generate imaging measurements of the formations;
- estimating a second dip from the imaging measurements;
- and
- determining the dip by combining the first and second dips.
A method for determining a dip, a vertical resistivity, and a horizontal resistivity of geologic formations penetrated by a wellbore using multiaxial induction measurements of the formations and imaging measurements of the formations, comprising:
- estimating a first dip from the multiaxial induction measurements;
- estimating a second dip from the imaging measurements;
- determining the dip by combining the first and second dips;
- and
- estimating the vertical resistivity and the horizontal resistivity using the dip.
Dependencies are inferred from the claim text.