Results 61 to 70 of about 3,047 (185)

Design and implementation of data acquisition and processing software for NMR logging

Dianzi Jishu Yingyong
The logging-while-drilling nuclear magnetic resonance (LWD NMR) instrument can provide in-situ formation porosity and permeability measurements unaffected by mud invasion, but it poses severe challenges to adaptability under extreme conditions and system
Li Fan, Shi Guanghui, Zhu Wanli, Cheng Zhiyong, Liu Juzhao   +4 more
doaj   +1 more source

Geosteering with LWD Azimuthal Sonic Measurements

Proceedings, 2010
Broad frequency azimuthal sonic tools provide intriguing geosteering possibilities. They allow us to steer on porosity, lithology, hydrocarbons, or even stress variations.
openaire   +2 more sources

Magnetic‐Field Modulation of Charge Transport in Non‐Fullerene Semiconductors for Enhanced Hydrogen Evolution

Advanced Materials Interfaces, Volume 13, Issue 14, 21 July 2026.
ABSTRACT This study demonstrates that weak magnetic fields (16–40 mT) increase the efficiency of the hydrogen evolution reaction (HER) in electrocatalysts based on non‐fullerene acceptor (NFA) derivatives IT‐4Cl and Y6. Electrochemical measurements reveal that the application of the magnetic field reduces the onset potential and increases the current ...
João Paulo Araujo Souza, Marlus Koehler, John Fredy Ricardo Marroquin, Jorlandio Francisco Felix, Thanh‐Tuân Bui, Paulo Eduardo Narcizo de Souza, Sebastião William da Silva, Luana Wouk   +7 more
wiley   +1 more source

Logging While Drilling Resistivity and Wireline Resistivity Logging Data Comparison and Quality Control Methods

Cejing jishu
To enhance the reliability of reservoir evaluation in complex wells and to address the issues of inconsistent responses and cross-validation difficulties arising from differences in measurement principles and environmental conditions between logging ...
Yang Zhen, Qiao Ping, Li Yonghua, Lu Chao   +3 more
doaj   +1 more source

Cross-field Pitting Characteristics of Reaction Wood in the Stem Wood of Pinus merkusii and Agathis loranthifolia

BioResources
This research investigated and compared the pitting type, pit number (PN), and pit diameter (PD) in the cross-field of compression wood (CWD), lateral wood (LWD), and opposite wood (OWD) in stem wood of Pinus merkusii and Agathis loranthifolia growing in
Byantara Darsan Purusatama, Nam Hun Kim
doaj   +2 more sources

Survey and Classification of Large Woody Debris (LWD) in Streams Using Generated Low-Cost Geomatic Products

Remote Sensing, 2014
Water authorities are required to have a survey of large woody debris (LWD) in river channels and to manage this aspect of the stream habitat, making decisions on removing, positioning or leaving LWD in a natural state.
Damian Ortega-Terol, Miguel A. Moreno, David Hernández-López, Pablo Rodríguez-Gonzálvez   +3 more
doaj   +1 more source

Experimental Coefficient of Discharge for Leaky Woody Dams in Clear Water Conditions

Journal of Flood Risk Management
Natural flood management (NFM) uses natural features and processes to manage flood risk. Although natural processes in river flow are well known, their use to manage floods has been only deeply analyzed since recent years, and the hydraulic behavior and ...
Pedro Martin‐Moreta, Oscar Herrera‐Granados, Reuben Bourne, Thomas Curwel, Richard Body, Marta Roca‐Collel   +5 more
doaj   +1 more source

Using Repeated Light-Weight Deflectometer Test Data to Predict Flexible Pavement Responses Based on the Mechanistic–Empirical Design Method

Construction Materials
This study investigated the potential of lightweight deflectometer (LWD) data in predicting layer moduli and response measurements within the Mechanistic–Empirical Pavement Design Guide.
Dina Kuttah
doaj   +1 more source

Modelling rapid non-destructive test using light weight deflectometer on granular soils across different degrees of saturation

Journal of Rock Mechanics and Geotechnical Engineering
This study introduces an advanced finite element model for the light weight deflectometer (LWD), which integrates contact mechanics with fully coupled models.
Javad Ghorbani, Arooran Sounthararajah, Troyee Tanu Dutta, Jayantha Kodikara   +3 more
doaj   +1 more source

Development and implementation of «logging-while-drilling» technology in Ukraine. Methods and tools for determination of petrophysical parameters of reservoirs while drilling vertical, deviated and horizontal oil-and-gas boreholes

Геофизический журнал
Logging-while-drilling (LWD) oil-and-gas boreholes is an advanced technology that improves the efficiency of drilling-and-logging operations. The cost of services and the technological monopoly of foreign firms, and their leaving from Ukraine in 2022 ...
M,S, Bondarenko, V.V. Kulyk, S.M. Danyliv   +2 more
doaj   +1 more source