Results 61 to 70 of about 237,953 (402)

Unravelling the relative contributions of climate change and ground disturbance to subsurface temperature perturbations: Case studies from Tyneside, UK [PDF]

, 2016
When assessing subsurface urban heat islands (UHIs) it is important to distinguish between localized effects of land-use change and the impacts of global climate change. However, few investigations have successfully unraveled the two influences.
Westaway, Rob, Younger, Paul L.
core   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

Deep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Investigation of Large-Diameter Borehole for Enhancing Permeability and Gas Extraction in Soft Coal Seam

, 2020
The efficiency of gas extraction from the soft coal seam with ultralow permeability is low. Gas extraction with large-diameter borehole is proposed to deplete gas content for preventing gas outburst disaster in this study.
Yongwen Wang, Wanjun Yan, Zhongjiu Ren, Zhiqiang Yan, Ziwen Liu, Heng Zhang   +5 more
semanticscholar   +1 more source

Strontium Isotope as Tracers of Groundwater Contamination [PDF]

, 2017
Groundwater flowing under a municipal solid waste landfill has been studied to identify potential contamination phenomenon and to test strontium isotopic composition as a natural tracer of contamination.
BARBIERI, Maurizio, NIGRO, ANGELA, SAPPA, Giuseppe   +2 more
core   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

Use of hydromonitor roller bits for drilling blast boreholes

Известия высших учебных заведений: Геология и разведка
Background. Blast boreholes can be drilled using various drilling tools. The drilling efficiency of roller bits (up to 30 m per shift in Azerbaijan) is significantly higher than that of other drilling tools (10—15 m per shift), which explains their wider
R. S. Ibrahimov, Sh. O. Bahshalieva, P. V. Suleymanova   +2 more
doaj   +1 more source

Study of Transfer Characteristics of a Molecular Electronic Sensor for Borehole Surveys at High Temperatures and Pressures

Sensors, 2019
The paper considers the development and experimental study of the characteristics of a high-temperature motion parameter sensor based on molecular-electronic technology (MET) operating at elevated pressures.
Ilya Evseev, Dmitry Zaitsev, Vadim Agafonov   +2 more
doaj   +1 more source

Determination of stress state in deep subsea formation by combination of hydraulic fracturing in situ test and core analysis: A case study in the IODP Expedition 319

, 2013
[1] In situ test of hydraulic fracturing (HF) provides the only way to observe in situ stress magnitudes directly. The maximum and minimum horizontal stresses, SHmax and Shmin, are determined from critical borehole pressures, i.e., the reopening pressure
Boutt, David, Boutt, David, Byrne, Timothy, Byrne, Timothy, Doan, Mai-Linh, Doan, Mai-Linh, Funato, Akio, Funato, Akio, ITO, HISAO, Ito, Takatoshi, KANO, YASUYUKI, LIN, WEIREN, McNeil, Lisa, McNeil, Lisa, MOE, KYAW, Saffer, Demian, Saffer, Demian, モー, キョー, 伊藤, 久男, 伊藤, 高敏, 加納, 靖之, 林, 為人   +21 more
core   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source