This study introduces the energy signals of transient electromagnetic method (TEM) data by
using the Hilbert transform. They are compared to the conventional TEM data for detecting …

The maximum distance at which an electromagnetic (EM) logging while drilling (LWD) tool
detects an approaching boundary is defined as the depth of detection (DOD). Ultra-deep …

abstract The maximum distance at which an electromagnetic (EM) logging while drilling
(LWD) tool detects an approaching boundary is defined as the depth of detection (DOD) …

An electromagnetic (EM) logging while drilling (LWD) tool is proposed for deep reading
detection ahead of the drill bit. The EM LWD tool consists of one coil transmitter sub and two …

The maximum distance at which an electromagnetic (EM) logging while drilling (LWD) tool
can sense a formation boundary is considered to be the depth of detection (DOD). A new …

Directional electromagnetic (EM) logging while drilling (LWD) tools have been widely used
in well navigation for its azimuthal sensitivity and deep depth of detection (DOD). In this …

This paper presents a new deep-reading logging-while-drilling electromagnetic (EM)
logging method to detect bed boundaries ahead of bit. Unlike all existing EM logging …

Logging-while-drilling (LWD) technology has been used as a real-time aid in directional
drilling. In this dissertation, a full investigation is conducted on the use of LWD resistivity …

Geosteering is an essential tool to reduce development costs and maximize the
development of complex oil and gas resources, which can guide the drilling direction of the …

In order to detect changes in stratigraphic structures in time, and accurately evaluate
formation while avoiding drilling risks, logging while drilling (LWD) instruments are required …