Results 31 to 40 of about 464 (176)

Investigation of collar properties on data-acquisition scheme for acoustic logging-while-drilling [PDF]

Geophysics, 2016
ABSTRACT We have used the wavenumber integration, velocity-time semblance, and dispersion methods to investigate the influence of collar properties including velocities, density, and attenuation on acoustic logging-while-drilling wavefields.
Hua Wang, Mike Fehler, Guo Tao, Zhoutuo Wei   +3 more
openaire   +2 more sources

DeepSeg-based noise reduction algorithm trained on a hybrid synthetic dataset for signals from acoustic logging-while-drilling

Artificial Intelligence in Geosciences
Acoustic logging-while-drilling (ALWD) enables real-time acoustic measurements during drilling operations. However, challenging downhole conditions introduce considerable noise into ALWD signals.
Xin Fu, Junyi Song, Yang Gou
doaj   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

Charring Behaviour of Mass Timber: A Comparison of Thin Intumescent Coatings and Plasterboard

Fire and Materials, EarlyView.
ABSTRACT This study compares the charring behaviour of mass timber under varied heating conditions when protected by either different thin intumescent coating types or fire‐rated plasterboard layers. Bench‐scale fire experiments were conducted using the Heat‐Transfer Rate Inducing System (H‐TRIS).
Stavros Spyridakis, Anwar Orabi, Cristian Maluk, David Barber, Felix Wiesner   +4 more
wiley   +1 more source

Multiphase Tectonic Process With Slab Dynamics in the Northern East China Sea Shelf Basin

Geological Journal, EarlyView.
Megasequence 1 characterised by Palaeocene extension and differential subsidence driven by the rollback of the subducting Izanagi Plate. Megasequence 2 records a kinematic reorganisation of the East Asian margin, transition from a rifting to a compressional regime.
Juhwan Woo, Won‐Ki Kim, Chul Woo Rhee, Seungyeol Lee   +3 more
wiley   +1 more source

The Glacial Legacy of the Geneva Basin: Morphology and implications of an intricate tunnel valley system revealed from 3D seismic data

Journal of Quaternary Science, EarlyView.
ABSTRACT Like other perialpine basins and glaciated margins, the Geneva Basin in SW Switzerland is characterised by buried tunnel valleys, which are elongated incisions widely attributed to subglacial meltwater erosion beneath continental ice sheets. However, an inclusive understanding of the geological control on the evolution of the glacial landscape
Ovie Emmanuel Eruteya, Emna Meftah, Andrea Moscariello   +2 more
wiley   +1 more source

Real-Time Estimation Method of P-Wave Slowness Based on Kalman Filtering and STC

Cejing jishu
The real-time extraction of acoustic interval time is of significant importance for rapidly evaluating reservoir quality and timely optimizing exploration and development decisions.
SUN Hao, CHEN Wenhui, SUN Xuekai, YU Weidong, LI Siyi, ZHAO Peng   +5 more
doaj   +1 more source

Quantifying Soft‐Surgery in Cochlear Implantation: Multimodal Data From 30 International Specialists

The Laryngoscope, EarlyView.
Objective data from 30 specialist cochlear implant surgeons showed that surgical handling strongly influences intracochlear mechanical stress during implantation. Surgeons with fewer than 50 lifetime insertions performed significantly worse than more experienced colleagues, while self‐assessment did not reflect objective performance in any group ...
Philipp Aebischer, Georgios Mantokoudis, Marco Caversaccio, Stefan Weder   +3 more
wiley   +1 more source

Arc‐ZTE: Continuously‐Slewed Zero‐TE Imaging With Incoherent Temporal Sampling for Near‐Silent Dynamic MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To enable flexible dynamic and DCE MRI with low acoustic noise and high spatiotemporal resolution using zero echo time (ZTE) imaging. Methods This work proposes Arc‐ZTE, a technique in which the readout gradients of ZTE are continuously‐slewed to form arcs in k‐space that are sequentially rotated to yield an incoherent trajectory ...
Shreya Ramachandran, Tobias C. Wood, Gavin Zhang, Ali B. Syed, Shreyas S. Vasanawala, Michael Lustig   +5 more
wiley   +1 more source

Current Status and Development Trend of Look-Ahead While Drilling Technology

Shiyou jixie
As one of the key emerging technologies in the field of logging while drilling （LWD）， the look-ahead wile drilling （LAWD） technology can perform real-time detection on undrilled formation in front of the bit， effectively reducing the risk of drilling ...
Yan Sen, Gao Wenkai, Zhang Xiaohui, Wang Jiajin, Zhang Chunhua, Jia Hengtian   +5 more
doaj   +1 more source