Results 51 to 60 of about 240 (159)

A Priori Fourier Analysis for 2.5D Finite Elements Simulations of Logging-While-Drilling (LWD) Resistivity Measurements

Procedia Computer Science, 2016
AbstractTriaxial induction measurements provided by LWD tools generate crucial petrophysical data to determine several quantities of interest around the drilled formation under exploration, such as a map of resistivities. However, the corresponding forward modeling requires the simulation of a large-scale three-dimensional computational problem for ...
Ángel Rodríguez-Rozas, David Pardo
openaire   +1 more source

Near Steady Late Pleistocene Tropical Denudation Rates in SW Madagascar

Journal of Geophysical Research: Earth Surface, Volume 130, Issue 7, July 2025.
Abstract Denudation is a key parameter controlling the evolution of the Earth's surface, the production of soils, the stability of relief, or the long‐term evolution of climate. Climate fluctuations conversely have a strong impact on denudation, but these complex feedback mechanisms are still under‐constrained.
Etienne Large, Julien Charreau, Pierre‐Henri Blard, Germain Bayon, Eduardo Garzanti, Bernard Dennielou, Gwenaël Jouet, Natalia Vazquez Riveiros, Jacques Giraudeau, Laurie Reisberg, Aimeryc Shcumacher, Alfred Andriamamonjy, Amos Fety Michel Rakotondrazafy   +12 more
wiley   +1 more source

Research on calculation method of BI by logging while drilling of shale reservoirs: A case of Qiongzhusi formation in Cambrian, Weiyuan area

Youqicang pingjia yu kaifa, 2018
As a new parameter of the rock mechanics evaluation, the brittleness index （BI） has an important influence on the later fracturing and reconstruction of the reservoirs.
Wang Hanwei, Xia Hongquan, Liu Chang, Zhao Hao   +3 more
doaj  

A theoretical analysis of the logging-while-drilling dipole acoustic reflection measurement

Frontiers in Earth Science
Post-drilling wireline acoustic single-well imaging technology can now detect geological structures tens of meters away from boreholes. Further development of this single-well imaging technology in the logging-while-drilling (LWD) environment will have ...
Yanghu Li, Yanghu Li, Zhenlin Wang, Zhenlin Wang, Yuanda Su, Xiaoming Tang   +5 more
doaj   +1 more source

Unlocking the Style and Timing of Submarine Landslides: Insights From the Tuaheni North Slide, Hikurangi Margin

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract We investigate the morphology and timing of Tuaheni North, a large submarine landslide within the Tuaheni Landslide Complex on Aotearoa New Zealand's Hikurangi Margin. We show a clear correlation between two major source volumes from Tuaheni North and two downslope mass transport deposits (MTDs), suggesting there were two distinct events ...
Alexey Portnov, Jess I. T. Hillman, Sally Watson, Ann E. Cook, Andreas Laake, Francisco José Lobo   +5 more
wiley   +1 more source

Recent Advances in the Use of Drill Cuttings for Determining Subduction Zone Structure, Stratigraphy, and Stress State

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract Obtaining in situ samples from active subduction systems is critical for assessing the material properties and geological evolution of rocks and sediments that host plate boundary deformation, and advancing our understanding of the processes that lead to fault locking and rupture.
P. H. Cornard, A. M. Schleicher, C. Regalla, M. Hamahashi, M. Kitamura, R. Fukuchi, K. T. Pickering, H. Kitajima, T. Wiersberg   +8 more
wiley   +1 more source

Development of Eccentric Transmitter Transducer for LWD Acoustic Remote Detection

Cejing jishu
To address the challenge that traditional logging while drilling (LWD) acoustic transducers lack directional radiation capability, hindering the identification of geological structures outside the borehole in drilling environments, this study developed ...
SUN Zhifeng, QIU Ao, LIU Xien, LUO Bo, LI Jie, ZHAO Han   +5 more
doaj   +1 more source

High‐magnification platform for characterising microscopic communities

Methods in Ecology and Evolution, Volume 16, Issue 4, Page 715-721, April 2025.
Abstract Characterising microscopic communities is important for both ecological research and diagnostic applications. In these areas, light microscopy is still a fundamental tool due to its accessibility and real‐time imaging capabilities. However, the higher magnifications required for accurate identifications typically necessitates extensive sample ...
Gerhard du Preez
wiley   +1 more source

Orchestrated desaturation reprogramming from stearoyl‐CoA desaturase to fatty acid desaturase 2 in cancer epithelial‐mesenchymal transition and metastasis

Cancer Communications, Volume 45, Issue 3, Page 245-280, March 2025.
Abstract Background Adaptative desaturation in fatty acid (FA) is an emerging hallmark of cancer metabolic plasticity. Desaturases such as stearoyl‐CoA desaturase (SCD) and fatty acid desaturase 2 (FADS2) have been implicated in multiple cancers, and their dominant and compensatory effects have recently been highlighted.
Zhicong Chen, Yanqing Gong, Fukai Chen, Hyeon Jeong Lee, Jinqin Qian, Jing Zhao, Wenpeng Zhang, Yamin Li, Yihui Zhou, Qiaobing Xu, Yu Xia, Liqun Zhou, Ji‐Xin Cheng   +12 more
wiley   +1 more source

Coeval Transverse and Axial Sediment Delivery to the Northern Hikurangi Trough During the Late Quaternary

Basin Research, Volume 37, Issue 1, January–February 2025.
Sediment delivery to the northern Hikurangi Trough has been driven by transverse gravity flows funnelled through the Māhia Canyon, alongside contributions from the overspill of the axial Hikurangi Channel. Large‐scale sediment waves and scours were formed by flows from the Māhia Canyon during MIS2 in response to substantially higher sediment fluxes ...
Anthony E. Shorrock, Lorna J. Strachan, Philip M. Barnes, Gregory F. Moore, Adam D. McArthur, Davide Gamboa, Adam D. Woodhouse, Rebecca E. Bell, Sam R. Davidson, Helen C. Bostock   +9 more
wiley   +1 more source