US 2015/0315904 A1 · Integrated Wellbore Caliper

Abstract

Systems and methods are provided for an integrated caliper measurement obtained based on caliper measurements from at least two downhole tools. In one example, a system for obtaining such an integrated caliper includes several caliper tools and data processing circuitry. The caliper tools may respectively obtain caliper measurements of a wellbore. The data processing circuitry may assign respective weights to the respective caliper measurements and combine the weighted caliper measurements to obtain an integrated caliper measurement. The confidence factors may be determined based at least partly on at least two of a plurality of weighting functions. These weighting functions may each relate a confidence of the caliper measurements to an environmental or drilling characteristic occurring when the caliber measurements are obtained.

Claims16

Dependent claims

A system comprising:

a plurality of caliper tools configured to obtain respective caliper measurements of a wellbore;
and
data processing circuitry configured to assign respective confidence factors to weight the respective caliper measurements and combine the weighted caliper measurements to obtain an integrated caliper measurement, wherein the confidence factors are determined based at least partly on at least two of a plurality of weighting functions that each relate a confidence of the caliper measurements to an environmental or drilling characteristic occurring when the caliber measurements are obtained.

One or more tangible non-transitory machine-readable media storing instructions to:

receive a first caliper measurement deriving from a first downhole tool;
receive a second caliper measurement deriving from a second downhole tool;
receive a plurality of conditions under which the first downhole tool obtained the first caliper measurement and under which the second downhole tool obtained the second caliper measurement;
determine a first confidence factor representing a degree of confidence that the first caliper measurement is accurate based at least in part on a plurality of weighting factors each associated with one of the plurality of conditions;
determine a second confidence factor representing a degree of confidence that the second caliper measurement is accurate based at least in part on a plurality of weighting factors each associated with one of the plurality of conditions;
and
determine an integrated caliper measurement using the first caliper measurement, the first confidence factor, the second caliper measurement, and the second confidence factor.

4 more elements

Dependencies are inferred from the claim text.

Integrated Wellbore Caliper

Life of this patent

Integrated Wellbore Caliper

Life of this patent

Abstract

Claims16