Results 21 to 30 of about 207,601 (314)

Pore surface exploration by NMR [PDF]

open access: yes, 2003
A carefully chosen set of experimental techniques applied to porous media characterization provides results that can be much greater than the sum of the individual parts.
Webber, J. Beau W.   +2 more
core   +1 more source

Numerical simulation on the effect of pore pressure gradient on the rules of hydraulic fracture propagation

open access: yesEnergy Exploration & Exploitation, 2021
To clarify the influence of pore pressure gradient on hydraulic fracture propagation, the stress distribution in and around the borehole is explained by theoretical analysis method in this paper.
Weiyong Lu, Changchun He
doaj   +1 more source

Seepage and stability analysis of pore air pressure on a high-bench dump under heavy rainfall

open access: yes工程科学学报, 2021
Under heavy rainfall, the pore air pressure in the unsaturated zone of a dump hinders rainwater infiltration in loose soil, which further affects the safety and stability of the dump.
Bo CUI   +7 more
doaj   +1 more source

One-dimensional compression theoretical model for shield foam-conditioned coarse-grained soil considering influences of gradation

open access: yesYantu gongcheng xuebao, 2023
Under the state of chamber pressure, the pore pressure of conditioned soil will be generated, and it can balance the water pressure in front of the excavation to reduce the level of groundwater infiltration.
ZHAN Yongjie 1, 2, WANG Shuying 1, 2, YANG Xiuzhu 1, WANG Haibo 3
doaj   +1 more source

Gas hydrate growth and dissociation in narrow pore networks: capillary inhibition and hysteresis phenomena [PDF]

open access: yes, 2009
Marine sediments hosting gas hydrates are commonly fine-grained (silts, muds, clays) with very narrow mean pore diameters (0.1 mm). This has led to speculation that capillary phenomena could play an important role in controlling hydrate distribution in
Webber, J. Beau W.   +5 more
core   +1 more source

Field monitoring of pore water pressure in fully and partly saturated debris flows at Ohya landslide scar, Japan [PDF]

open access: yesEarth Surface Dynamics
The characteristics of debris flows (e.g., mobility, sediment concentration, erosion, and deposition of sediment) are dependent on the pore water pressure in the flows.
S. Oya, F. Imaizumi, S. Takayama
doaj   +1 more source

Using a novel approach to determine the pore pressure of West Qurna 15 oil well in South of Iraq

open access: yesJournal of Engineering, 2020
Pore pressure means the pressure of the fluid filling the pore space of formations. When pore pressure is higher than hydrostatic pressure, it is named abnormal pore pressure or overpressure.
Sara Thaier Haider   +2 more
doaj   +1 more source

Pore Structure Evolution in Sandstone of Underground Gas Storage during Cyclic Injection and Production Based on Nuclear Magnetic Resonance Technology

open access: yesEnergies, 2023
The underground gas storage (UGS) in depleted sandstone reservoirs forms the largest proportion of the UGS market in China. Multiple cycles of natural gas injection and production in the sandstone cause the rapid increase and drawdown of pore pressure ...
Xiaosong Qiu   +6 more
doaj   +1 more source

Development of a pore gas pressure transducer used in unsaturated soils at high water content [PDF]

open access: yesE3S Web of Conferences, 2019
Pore gas pressure in soil is an important parameter in many geoscience applications such as evaluating the effects of trapped pore gas pressure on water infiltration through soil mass, optimizing the design of gas extraction wells in landfills and ...
Chen Rui   +3 more
doaj   +1 more source

Experimental Investigation of the Effect of Evenly Distributed Pore Pressure on Rock Damage

open access: yesLithosphere, 2022
The effect of pore pressure on rock damage is a core problem in underground engineering. In this paper, the pseudotriaxial hydromechanical coupling experiment system is utilized to carry out the physical model experiment of the pore pressure on the rock ...
Xinglong Zhao   +3 more
doaj   +1 more source

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