US 12,247,477 B2
Image based stick slip correction of logging while drilling images
Shiduo Yang, Clamart (FR); Alexis He, Clamart (FR); and Tianhua Zhang, Clamart (FR)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 18/719,991
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed May 31, 2023, PCT No. PCT/US2023/023931
§ 371(c)(1), (2) Date Jun. 14, 2024,
PCT Pub. No. WO2023/235357, PCT Pub. Date Dec. 7, 2023.
Claims priority of application No. 22305795 (EP), filed on May 31, 2022.
Prior Publication US 2024/0418075 A1, Dec. 19, 2024
Int. Cl. G06T 7/00 (2017.01); E21B 47/002 (2012.01); E21B 47/04 (2012.01); G06T 11/00 (2006.01)
CPC E21B 47/0025 (2020.05) [E21B 47/04 (2013.01); G06T 7/0004 (2013.01); G06T 11/005 (2013.01); E21B 2200/22 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A method for correcting a logging while drilling (LWD) image to remove stick slip features, the method comprising:
obtaining an LWD image in a wellbore, the LWD image including a two-dimensional representation of LWD measurements at discrete azimuthal angles and one or more depths in the wellbore;
acquiring surface depth measurements at one or more time intervals from a depth measurement module at the surface;
interpolating surface depth measurements to obtain interpolated surface depths at a selected depth of the one or more depths in the LWD image;
evaluating the interpolated surface depths to obtain a first tool status log, wherein the first tool status log includes surface depth tool stop intervals;
evaluating the LWD image to obtain a second tool status log, wherein the second tool status log includes image depth tool stop intervals;
synchronizing the first tool status log and the second tool status log to obtain a synchronized log based on the surface depth tool stop intervals and the image depth tool stop intervals;
identifying a depth of a stick slip feature in the LWD image; and
resampling the interpolated surface depths to remove the stick slip feature from the LWD image and obtain a stick slip corrected LWD image.
 
16. A method for making stick slip corrected logging while drilling (LWD) imaging measurements, the method comprising:
conveying a LWD tool in a wellbore;
using the LWD tool to measure an LWD image while conveying, the LWD image including a two-dimensional representation of LWD measurements at discrete azimuthal angles and one or more depths in the wellbore;
acquiring surface depth measurements at one or more time intervals from a depth measurement module at the surface;
interpolating surface depth measurements made while measuring the LWD image to obtain interpolated surface depths at a selected depth of the one or more depths in the LWD image;
evaluating the interpolated surface depths to identify surface depth tool stop intervals while conveying the LWD tool;
evaluating the LWD image to identify image depth tool stop intervals;
shifting and rescaling the surface depth tool stop intervals and the image depth tool stop intervals to generate synchronized tool stop intervals;
identifying a depth of a stick slip feature in the LWD image; and
resampling the interpolated surface depths to remove the stick slip feature from the LWD image and obtain a stick slip corrected LWD image.