Results 51 to 60 of about 2,317,450 (234)

Noah's dove returns: Armenia, Turkey and the debate on genocide / European Stability Initiative

, 2009
Parallel als Buch-Ausg ...
unknown
core   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

The influence of temperature, seepage and stress on the area and category of wellbore instability

Scientific Reports
This study investigates the challenge of borehole instability in shale gas development, focusing on the interactions among temperature, fluid flow, and stress.
Xiaobo Liu, Jinyou Zhang, Hongge Jia, Tong Zhang, Xuejia Du, Zhongmin Wang   +5 more
doaj   +1 more source

Stress Profiles From Borehole Breakout Opening Width (SFBO)

Stress Profiles From Borehole Breakout Opening Width (SFBO) is a Python toolkit for estimating and visualizing stress magnitudes with depth from borehole breakout opening widths, rock strength data, pore-pressure information, and stress-gradient models ...
Niederhuber, Thomas
core   +1 more source

Major engineering breakthrough of Well XA‐1, the deepest ten‐thousand‐meter well in a global sedimentary basin

Deep Underground Science and Engineering, EarlyView.
Well XA‐1, completed at a true vertical depth of 11 156 m in the Shawan Sag of the Junggar Basin, is the deepest predominantly near‐vertical well drilled in a sedimentary basin. The figure shows the basin's tectonic framework and well location (a), a structural cross‐section spanning the Shawan Sag and adjacent uplifts (b), and the stratigraphic column
Fangkai Liu, Qingwen Tan, Sen Zhu, Guangyou Zhu   +3 more
wiley   +1 more source

World's fastest 10 000‐m breakthrough: The XY‐22 well redefines deep‐earth access in the Tarim Basin

Deep Underground Science and Engineering, EarlyView.
The Tarim Basin in northwestern China hosts one of the world's deepest petroleum systems, exemplified by the XY‐22 ultra‐deep well (bottom depth: 11 116 m; ~220°C, ~145 MPa). This study integrates tectonic mapping, geological cross‐sections, ultraviolet fluorescence microscopy, and optical photothermal infrared (OPTIR) spectroscopy to characterize ...
Qingwen Tan, Fangkai Liu, Sen Zhu, Guangyou Zhu, Haiping Huang   +4 more
wiley   +1 more source

Wellbore Stability of a Deep-Water Shallow Hydrate Reservoir Based on Strain Softening Characteristics

Geofluids, 2020
Deep-sea hydrate has great commercial exploitation value as a new type of energy, due to huge reserves, wide distribution, cleanliness, and lack of pollution.
Wenrong Feng, Danqiong Li, Guorong Wang, Yujia Song   +3 more
doaj   +1 more source

Anchorage weakening effect of coal roadway sidewall with different destressing borehole diameters

Energy Science & Engineering, 2023
The pressure relief with large‐diameter boreholes is one of the effective methods to prevent coal bumps in deep coal roadway. An unreasonable pressure relief design can cause the rockbolt support failure and aggravate the deformation of the surrounding ...
Yanchun Yin, Hongjie Zhou, Yubao Zhang, Chao Wang, Yanhui Deng, Biao Chen   +5 more
doaj   +1 more source

Numerical research on anti‐dislocation measures design of deep‐buried tunnels in an anisotropic rock mass area

Deep Underground Science and Engineering, EarlyView.
This paper conducts a numerical simulation study on the construction of a deep‐buried tunnel in an anisotropic stratum area. A statistical analysis of the effects of two anti‐faulting design measures, namely, a conventional design and an articulated design, is carried out, and the results demonstrate the effectiveness of the anti‐faulting structures ...
Shiqi Liu, Huanling Wang, Yong Zhou, Zhen Wang   +3 more
wiley   +1 more source

The Effects of Pore Pressure and Temperature Difference Variation on Borehole Stability [PDF]

, 2013
Considering that drilling fluid filtration and the temperature difference between borehole wall rock and drilling fluid can cause the stress variation of the borehole wall.
Chi, AI, Yu, LIU, Yuwei, LI
core   +1 more source