Results 151 to 160 of about 2,122 (176)

Mudstone permeability evolution under competitive principal stresses in true triaxial conditions

Physics of Fluids
Mudstone, serving as a gas-sealing medium in coal seams, exhibits low permeability that can lead to gas accumulation and the formation of high gas-risk zones. The competitive synergy among the principal stresses significantly impacts mudstone permeability, thereby complicating accurate permeability assessments in engineering applications. In this study,
Zhaoyang Gong, Dongming Zhang, Beichen Yu, Chongyang Wang, Chenyu Wang   +4 more
openaire   +1 more source

Generalized crack damage stress thresholds of hard rocks under true triaxial compression

Acta Geotechnica, 2019
The rock failure process can be characterized by several distinct stress thresholds: the crack closure stress σcc, crack initiation stress σci, crack damage stress σcd and peak stress σp. Seventy-one true triaxial compression tests were conducted to investigate the crack damage stress σcd, which is the stress at the onset of unstable crack development ...
Yaohui Gao, Xia-Ting Feng, Xiwei Zhang, Yangyi Zhou, Yan Zhang   +4 more
openaire   +1 more source

Mechanical Testing and Permeability Measurements of Reservoir Chalk Under True Triaxial Stress Conditions

Rock Mechanics in Petroleum Engineering, 1994
Abstract A newly developed specialized true triaxial cell for rock mechanical testing is described. The cell allows testing of 46 X 46 x 110 mm box shaped specimens under in-situ reservoir stress conditions. The operating effective stress is up to 100 MPa [14500 psi] in the vertical direction and 50 MPa (7250 psi) in the horizontal ...
Helle Christensen, Niels Foged
openaire   +1 more source

True Triaxial Test of Rock Under Stress and Strain Rate Control

1988
The significance of true triaxial tests instead of conventional tests has been enhanced because of the need for generalized constitutive laws for geomaterials. To investigate the behavior of rock masses having restricted conditions for strains, tests of marble under strain rate control as well as stress rate control were performed using a specially ...
T Esaki, T Kimura, K Aoki, T Nishida
openaire   +1 more source

Wellbore stability in high-temperature granite under true triaxial stress

Geothermics, 2022
Ryota Goto, Kiyotoshi Sakaguchi, Francesco Parisio, Keita Yoshioka, Eko Pramudyo, Noriaki Watanabe   +5 more
openaire   +1 more source

Petrophysical Properties Under True-Triaxial Stress For Hydrocarbon Recovery

Proceedings of SPE Permian Basin Oil and Gas Recovery Conference, 1998
S.S. Al-Harthy, J. Dennis, X.D. Jing, J.R. Marsden   +3 more
openaire   +1 more source

Experimental study on mechanical and damage characteristics of coal under true triaxial cyclic disturbance

Engineering Geology, 2021
Minke Duan
exaly  

Mutual impact of true triaxial stress, borehole orientation and bedding inclination on laboratory hydraulic fracturing of Lushan shale

Journal of Rock Mechanics and Geotechnical Engineering, 2023
Yongfa Zhang, Arno Zang, Chaolin Wang
exaly  

Experimental Study of Mechanical Behaviors and Failure Characteristics of Coal Under True Triaxial Cyclic Loading and Unloading and Stress Rotation

Natural Resources Research, 2022
Yunpei Liang, Qican Ran, Zou Quanle
exaly  

Failure properties of cubic granite, marble, and sandstone specimens under true triaxial stress

International Journal of Rock Mechanics and Minings Sciences, 2020
Kun Du, Ming Tao, Shaofeng Wang
exaly