US 12,326,078 B2
Effective resistivity models for geosteering decisions
Dagang Wu, Houston, TX (US); and Hsu-Hsiang Wu, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jul. 19, 2023, as Appl. No. 18/355,172.
Prior Publication US 2025/0027400 A1, Jan. 23, 2025
Int. Cl. G01V 3/20 (2006.01); E21B 7/04 (2006.01); E21B 44/00 (2006.01); E21B 47/0228 (2012.01)
CPC E21B 44/00 (2013.01) [E21B 7/04 (2013.01); E21B 47/0228 (2020.05); G01V 3/20 (2013.01); E21B 2200/20 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining, via one or more sensors on a drilling assembly, measurement data of a subsurface formation while drilling a wellbore in the subsurface formation;
generating a horizontal resistivity model of the subsurface formation at respective depths along the wellbore based on the measurement data;
generating a vertical resistivity model of the subsurface formation at the respective depths along the wellbore based on the measurement data;
generating an effective resistivity at the respective depths along the wellbore based on the horizontal resistivity model and the vertical resistivity model to indicate a formation resistivity in each direction of the wellbore;
plotting the effective resistivity at the respective depths to generate a visualization of the effective resistivity in a user interface on a display device; and
steering a drill bit through the subsurface formation using the visualization of the effective resistivity.