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- Factors and detection capability of look-ahead logging while drilling . . .
Electromagnetic technology used in logging while drilling (LWD) provides the resistivity distribution around a borehole within a range of several tens…
- 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
- 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
- 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
- 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
- Determining the resilient modulus of sandy subgrade using cyclic light . . .
The most practical advantages of LWD are that the setup and test times of LWD are relatively short [42], [37] In addition, LWD testing is safe and the field inspector is able to remain standing and visible during most of the testing process [10] On the other hand, there are many factors that influencing the light weight deflectometer
- Novel transmitter transducer for acoustic logging while drilling
In this paper, a new transmitter transducer for an acoustic logging while drilling (ALWD) tool is proposed The piezoelectric ceramic is cut into two parts based on conventional transducers, and a buffer material is set in the middle Thus, the radial vibration displacement of the new transducer is larger at the resonant frequency, whereas the longitudinal coupling vibration is significantly
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