Automated mud slowness estimation
AssigneeSchlumberger Technology Corporation
InventorsHenri-Pierre Valero, Hugues A. Djikpesse, Bikash K. Sinha
Life of this patent
Estimating the term…
Abstract
An integrated framework is described for automating some or all of mud slowness estimation for both fast and slow formations. An estimation of fluid slowness based on monopole radial profiling is calculated if conditions permit. Alternatively, an estimation of fluid slowness based on Scholte wave slowness is estimated if conditions do not permit calculation based on monopole radial profiling. Tool standoff may also be estimated based on monopole radial profiling.
Claims20
A method of estimating an indication of fluid slowness comprising:
- providing processing circuitry for calculating an indication of fluid slowness of a fluid within a formation based on monopole radial profiling;
- providing processing circuitry for calculating an indication of said fluid slowness based on Scholte wave slowness;
- calculating an indication of said fluid slowness based on monopole radial profiling if conditions permit;
- and
- calculating an indication of said fluid slowness based on Scholte wave slowness if conditions do not permit calculation based on monopole radial profiling.
Apparatus for estimating an indication of fluid slowness comprising:
- at least one acoustic sensor for obtaining monopole radial profiling data and Scholte wave slowness data of a fluid within a formation;
- processing circuitry for calculating an indication of said fluid slowness based on monopole radial profiling if conditions permit;
- and
- processing circuitry for calculating an indication of said fluid slowness based on Scholte wave slowness if conditions do not permit calculation based on monopole radial profiling.
Dependencies are inferred from the claim text.