Results 21 to 30 of about 169,499 (264)

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

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

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

Coupling effects of bidirectional cyclic loading and loading frequency on pore water pressure of saturated soft clay

open access: yesYantu gongcheng xuebao, 2017
A series of undrained cyclic tests with variable confining pressures are conducted on Ningbo saturated soft clay by using the GDS cyclic triaxial system. In this study, the coupling effects of cyclic deviatoric stress and cyclic confining pressure on the
HUANG Jue-hao 1, 2, CHEN Jian 1, 2, KE Wen-hui 3, ZHONG Yu 4, QIU Yue-feng 1, 2
doaj   +1 more source

Effects of Initial Shear Stress and Vibration Frequency on the Dynamic Pore-Water Pressure of Saturated Sands

open access: yesAdvances in Civil Engineering, 2018
The cyclic triaxial system is used to investigate the effects of confining pressure, initial shear stress, vibration frequency, and dynamic stress on the pore-water pressure characteristics of saturated sand in the Wenchuan area.
Jian Zhang, Jiuting Cao, Sijie Huang
doaj   +1 more source

A Fluid-Solid Coupling Mathematical Model of Methane Driven by Water in Porous Coal

open access: yesGeofluids, 2018
The existence of the water-driven-methane effect in gassy coal has been verified by field tests and laboratory experiments. However, a water-driven-methane mathematical model that considers methane adsorption and desorption has not yet been established ...
Bingxiang Huang, Weiyong Lu
doaj   +1 more source

Effect of pressure in pore on pore morphology of porous Cu-1.3Cr alloy with directional pores

open access: yesJournal of Aeronautical Materials, 2022
Cu-1.3Cr alloys with directional pore structure were fabricated under hydrogen atmosphere. The pore morphology during the solidification is investigated.
SONG Qunling   +4 more
doaj   +1 more source

A semi-empirical model to predict excess pore pressure generation in partially saturated sand [PDF]

open access: yesE3S Web of Conferences, 2020
Past studies revealed that excess pore pressure generation due to cyclic loading is highly governed by induced strains, volumetric deformation potential of soil, number of cycles, and bulk stiffness of pore fluid.
Sayedmasoud Mousavi, Ghayoomi Majid
doaj   +1 more source

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