Patent ID: 9002648
Filing Date: 2015-04-07
Classification: E21B,G01V

Abstract:
1. A method for use in a downhole tool having a distance measurement device, a feature detection device, and a primary measurement device positioned therein, the method comprising: recording in a first log, while the downhole tool is in a borehole, a first plurality of features detected using the feature detection device while the feature detection device and the distance measurement device are being moved with respect to the downhole tool, wherein each of the first plurality of features is recorded with a corresponding position measured using the distance measurement device, wherein the corresponding position of each of the first plurality of features corresponds to a distance measurement relating to an internal position of the feature detection device with respect to the downhole tool when the feature detection device detected the respective plurality of features; selecting a first feature of the first plurality of features in the first log and identifying the position corresponding to the first feature; without controllably moving an overall position of the downhole tool in the borehole, moving the feature detection device with respect to the downhole tool based on the identified relative position of the first feature to align the feature detection device relative to the first feature; taking a first primary measurement using the primary measurement device while the feature detection device is aligned relative to the first feature; and repeating the steps of recording, selecting, moving, and taking to obtain at least a second primary measurement while the feature detection device is aligned relative to a second feature of a second plurality of features in a second log.