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Real-time forward modeling and inversion of logging-while-drilling . . . By introducing priori information of offset pilot wells and using the classic responses of LWD EM, the interac- tive inversion of LWD EM logging in horizontal wells is capable of providing real-time and accurate bed bounda- ries around the borehole and reducing the uncertainty and non-uniqueness of interpretation results
Logging While Drilling - an overview | ScienceDirect Topics Logging while drilling (LWD) refers to systems and techniques for gathering down-hole data during drilling without removing the drill pipe from the well LWD tools, which are instrumented drill collars, provide data transmission to the surface via pulses into the mud or signals on the drill pipe, offering advantages in data collection for extended-reach lateral horizontal wells AI generated
Real-time estimation of geomechanical characteristics using drilling . . . A common issue with LWD tools is their offset from the drill bit, leading to depth discrepancies that compromise the real-time aspect of Vs predictions Our model synchronizes drilling mechanics data with LWD measurements using advanced time-series analysis to account for the drill bit's position, thereby overcoming these discrepancies
The use of light weight deflectometer for in situ evaluation of sand . . . The light weight deflectometer (LWD) is a hand portable falling weight device that first appeared in 1981 at Magdeburg, Germany and developed as in situ testing device by the Federal Highway Research Institute, and HMP Company in Germany [1] The LWD has gained acceptance and popularity in several countries such as the United States, as there is a growing interest in the use of LWD as in situ
Importance of drilling-related processes on the origin of borehole . . . The LWD tools are installed within drill collars at the lowermost part of the drill string and allow the real-time quantification of perturbations (e g pressure) while drilling as well as their impact on wellbore stability 45 The acquisition timing of LWD is the central advantage compared to wireline logging 46, opening the pathway to
A fast forward algorithm of azimuthal gamma imaging logging while . . . An algorithm to achieve the fast simulation of azimuthal gamma logging response and imaging are introduced Logging while drilling (LWD) technology can evaluate the formation interface and stratigraphic properties around the borehole in real time, so as to adjust the drilling trajectory and effectively improve the reservoir encounter rate