Results 31 to 40 of about 9,272,105 (348)

An experimental investigation of the nonlinear gas flow and stress‐dependent permeability of shale fractures

Energy Science & Engineering, 2020
The fluid flow characteristics in shale fractures are of great significance for shale gas reservoir evaluation and exploitation. In this study, artificial tension fractures in shale were used to simulate the hydraulic fractures formed by fracturing, and ...
Zhonghui Shen, Lei Zhou, Xiaopeng Su, Honglian Li, Jiren Tang, Xuelin Zheng   +5 more
doaj   +1 more source

High-sensitivity cardiac troponin T and copeptin assays to improve diagnostic accuracy of exercise stress test in patients with suspected coronary artery disease [PDF]

, 2014
Background: The average diagnostic sensitivity of exercise stress tests (ESTs) is lower than that of other non-invasive cardiac stress tests. The aim of the study was to examine whether high-sensitivity cardiac troponin T (hs-cTnT) or copeptin ...
Dörr, Oliver, Gaede, Luise, Hamm, Christian W., Hoffmann, Jedrzej, Liebetrau, Christoph, Möllmann, Helge, Nef, Holger M., Rolf, Andreas, Weber, Michael, Wolter, Jan S.   +9 more
core   +1 more source

Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir

Energies, 2020
This paper investigates the bottom-hole pressure (BHP) performance of a fractured well with multiple radial fracture wings in a coalbed methane (CBM) reservoir with consideration of stress sensitivity.
Zuhao Kou, Haitao Wang
doaj   +1 more source

Optimizing tight oil extraction from low permeability tight reservoirs: a study on stress sensitivity effects and applications in carbon capture, utilization, and storage

Frontiers in Energy Research, 2023
This paper takes into consideration the impact of stress sensitivity on bioenergy production from low permeability tight reservoirs, focusing on the post-fracturing phase.
Xin Jiang, Gaoming Yu
doaj   +1 more source

Sympathetic nervous system dominance during stress recovery mediates associations between stress sensitivity and social anxiety symptoms in female adolescents

Development and Psychopathology, 2020
Social anxiety disorder (SAD) is commonly diagnosed during adolescence and is associated with psychological stress reactivity and heightened physiological arousal.
T. Ho, Holly T. Pham, Jonas G. Miller, K. Kircanski, I. Gotlib   +4 more
semanticscholar   +1 more source

Experimental study on stress sensitivity of high‐temperature and high‐pressure sandstone gas reservoirs in Yingqiong Basin

Energy Science & Engineering, 2020
Performing stress‐sensitivity evaluation on a high‐temperature and high‐pressure gas reservoir is essential for correctly understanding the characteristics of physical property changes and reasonably designing the development scheme of a reservoir under ...
Yi‐Long Li, Xiao‐Ping Li, Feng Wu, Hong‐Lin Lu, Xiao Lei, Wen‐Juan Wang, Rui‐Bin Lu, Ji Li, Xiao‐Hua Tan   +8 more
doaj   +1 more source

Analytical Model for the Pressure Performance Analysis of Multi-Fractured Horizontal Wells in Volcanic Reservoirs

Energies, 2023
Multi-fractured horizontal well (MFHW) technology is a key technology for developing unconventional reservoirs, which can generate a complex fracture network called a stimulated reservoir volume (SRV). Currently, there are many relative analytical models
Junqiang Wang, Xiaolong Qiang, Zhengcheng Ren, Hongbo Wang, Yongbo Wang, Shuoliang Wang   +5 more
doaj   +1 more source

Production schedule optimization of gas wells in W shale gas reservoir under controlled pressure difference based on numerical simulation

Youqicang pingjia yu kaifa, 2023
The complex fracture networks are often formed after large-scale hydraulic fracturing in shale gas reservoirs, and the shale gas production rates decrease quickly due to the stress sensitivity.
HE Feng, FENG Qiang, CUI Yushi
doaj  

Membranes fabricated with a deep single corrugation for package stress reduction and residual stress relief [PDF]

, 1993
Thin square membranes including a deep circular corrugation are realized and tested for application in a strain-based pressure sensor. Package-induced stresses are reduced and relief of the residual stress is obtained, resulting in a large pressure ...
Bouwstra, S., Burger, J.F., Elwenspoek, M., Spiering, V.L.   +3 more
core   +2 more sources

Analysis of permeability evolution law of gas-bearing coal under cyclic loading condition

Meitan kexue jishu
In order to explore the permeability evolution law of gas-bearing coal under different cyclic loading and unloading conditions, raw coal samples were taken as the research object, and cyclic loading-unloading experiments of gas-bearing coal were designed
Dengke WANG, Haohang FENG, Jianping WEI, Xu CHEN, Zhigang JIANG, Xiuzhu YUAN, Yun BAI, Tanggen CAO, Wenchao XIONG   +8 more
doaj   +1 more source