Results 101 to 110 of about 144 (128)
Some of the next articles are maybe not open access.
SPE Kuwait Oil & Gas Show and Conference, 2017
Abstract Logging-While-Drilling (LWD) acoustic tools encounter interference from collar arrivals when attempting quantitative cement evaluation. In low-bonding condition, the interference is not significant, an amplitude-based bond index determination is reliable with the limitation in higher bonding conditions under most scenarios ...
Zhang Bin Qi +4 more
openaire +1 more source
Abstract Logging-While-Drilling (LWD) acoustic tools encounter interference from collar arrivals when attempting quantitative cement evaluation. In low-bonding condition, the interference is not significant, an amplitude-based bond index determination is reliable with the limitation in higher bonding conditions under most scenarios ...
Zhang Bin Qi +4 more
openaire +1 more source
The Journal of the Acoustical Society of America, 2019
Tool waves generated by the presence of the drill collar can cover the formation signals we need. The suppression for those collar waves has been a challenge for designing acoustic logging while drilling (ALWD) tools. To study the collar wave characteristics, we evaluate the excitation intensity of the modes with varying frequencies and positions by ...
Xiao He +3 more
openaire +1 more source
Tool waves generated by the presence of the drill collar can cover the formation signals we need. The suppression for those collar waves has been a challenge for designing acoustic logging while drilling (ALWD) tools. To study the collar wave characteristics, we evaluate the excitation intensity of the modes with varying frequencies and positions by ...
Xiao He +3 more
openaire +1 more source
Acoustic Logging While Drilling (LWD): Experimental Studies with Anisotropic Models
2002A model LWD tool (0.16" ID, 0.4" OD) was built to investigate its operation in an anisotropic formation. The tool consists of a dipole source and six dipole receivers capable of operating at several hundred kHz. The formation was a block of delabole slate with a borehole of 1.27 cm diameter.
Rao, Rama V. N. +3 more
openaire +1 more source
A comparison of logging while drilling (LWD) and wireline acoustic measurements
2006The instruments used to measure borehole acoustic data can be classified as either wireline or logging while drilling (LWD). The wireline tool measures formation speeds after the borehole is drilled, and the LWD tool measures formation speeds while the borehole is drilled.
openaire +1 more source
Characteristics of the collar wave in acoustic logging while drilling (LWD)
SEG Technical Program Expanded Abstracts 2016, 2016Wei Guan, Yufeng Yang, Hengshan Hu
openaire +1 more source