Edge detection of formation boundary based on 3D holographic azimuthal electromagnetic wave resistivity logging tool

Abstract

Geo-signals are critical in enabling the edge detection function of logging while drilling tools, with their detection depth directly reflecting the edge detection capability of the tool. To address the issue of insufficient edge detection distance in geological steering while drilling, a newly developed 3D holographic azimuthal electromagnetic wave resistivity logging tool is used to construct new geo-signals with full components to extend signal detection depth. By analyzing response characteristics in conjunction with downhole factors, it is determined that the tool can use this signal to express azimuthal information while completing formation boundary detection up to 9.6 meters in advance, with resistance to adverse effects in varying downhole environments.