Results 11 to 20 of about 522,196 (302)

Laboratory observations of permeability enhancement by fluid pressure oscillation of in situ fractured rock [PDF]

, 2011
We report on laboratory experiments designed to investigate the influence of pore pressure oscillations on the effective permeability of fractured rock.
Brodsky, Emily E., Elkhoury, Jean E., Marone, Chris, Niemeijer, André   +3 more
core   +8 more sources

The Coupling Effect of Pore Water Pressure and Pore Water Gravity in Unsaturated Soils under Rainfall Condition and Its Influence on Slope Stability

Geofluids, 2022
In the study of the impact of rainfall on the unsaturated soil slope, the changes of pore water pressure and effective stress are frequently analyzed, while the loading effect caused by the change of pore water content in unsaturated soils is often ...
Nenghao Zhao, Haijun Lu, Rongtang Zhang
doaj   +1 more source

3D modeling of abnormal pore pressure in shallow offshore Niger delta: An application of seismic inversion

Petroleum Research, 2021
Pore pressure is the pressure associated with fluids in the pore spaces of sedimentary rocks. This pressure varies from hydrostatic to severe overpressure. It is classified as abnormal pressure when it deviates from hydrostatic pressure.
Chukwuemeka Patrick Abbey, Osita Chukwudi Meludu, Adetola Sunday Oniku   +2 more
doaj   +1 more source

Numerical analysis of rapid drawdown: applications in real cases [PDF]

, 2016
In this study, rapid drawdown scenarios were analyzed by means of numerical examples as well as modeling of real cases with in situ measurements. The aim of the study was to evaluate different approaches available for calculating pore water pressure ...
Alonso Pérez de Agreda, Eduardo, Pinyol Puigmartí, Núria Mercè   +1 more
core   +2 more sources

Hydraulic and mechanical properties of glacial sediments beneath Unteraargletscher, Switzerland: implications for glacier basal motion [PDF]

, 2001
The force on a ‘ploughmeter’ and subglacial water pressure have been measured in the same borehole at Unteraargletscher, Switzerland, in order to investigate ice–sediment coupling and the motion at the base of a soft-bedded glacier.
Agassiz, Agassiz, Alley, Alley, Alley, Bear, Blake, Blankenship, Boulton, Brown, Campanella, Carslaw, Engelhardt, Engelhardt, Engelhardt, Fischer, Fischer, Fischer, Fischer, Fischer, Flotron, Freeze, Funk, Funk, Gudmundsson, Gudmundsson, Gudmundsson, Gudmundsson, Head, Hooke, Hugi, Hugi, Humphrey, Iken, Iken, Iverson, Iverson, Iverson, Iverson, Iverson, Janbu, Kamb, Knecht, Lambe, Malyshev, Mitchell, Murray, Murray, Porter, Porter, Press, Ruiter, Röthlisberger, Senneset, Skempton, Truffer, Tulaczyk, Weertman   +57 more
core   +1 more source

Experimental study on effect of initial static pore water pressure on static and dynamic shear properties of sand

Yantu gongcheng xuebao, 2019
A series of undrained cyclic torsional shear tests and monotonic torsional shear tests are carried out on Fujian standard sand and Hutuo River fine sand under different initial static pore water pressures by using the hollow cylinder torsional shear ...
XU Cheng-shun 1, LI Yan-mei 1,2, PAN Xia 1, GENG Lin 1
doaj   +1 more source

ENHANCING PORE PRESSURE PREDICTION IN OIL WELL DRILLING: A COMPREHENSIVE STUDY OF WELL PLANNING AND COST-EFFECTIVE MODELING IN THE NIGER DELTA REGION [PDF]

Engineering Heritage Journal, 2023
Accurate pore pressure prediction is pivotal in drilling operations, impacting safety, well design, and cost-effectiveness. This research paper aims to assess various pore pressure prediction methods, particularly in transition zones.
Kelechi Anthony Ofonagoro, Olawe Alaba Tula, Joachim Osheyor Gidiagba, Tina Chinwe Ndiwe   +3 more
doaj   +1 more source

Evaluation of a permeability-porosity relationship in a low permeability creeping material using a single transient test [PDF]

, 2009
A method is presented for the evaluation of the permeability-porosity relationship in a low-permeability porous material using the results of a single transient test. This method accounts for both elastic and non-elastic deformations of the sample during
Ai, Berge, Berge, Bernabé, Bernabé, Bernabé, Bernabé, Berryman, Biot, Brace, Breysse, Brown, Coussy, David, Detournay, Escoffier, Ghabezloo, Ghabezloo, Ghabezloo, Ghabezloo, Grasley, Hart, Hart, Jean Sulem, Jérémie Saint-Marc, Meziani, Rice, Scherer, Scherer, Scherer, Scherer, Siavash Ghabezloo, Sulem, Taylor, Vardoulakis, Walder, Wang, Zhu, Zimmerman, Zimmerman   +39 more
core   +5 more sources

Measurement and Evaluation for Interbedded Pore Water Pressure of Saturated Asphalt Pavement under Vehicle Loading

Applied Sciences, 2020
Dynamic water scouring damage is the main cause of pavement structure damage, and the main reason for dynamic water scouring damage is the rapid change of pore water pressure caused by vehicle load.
Wuxing Chen, Zhenyong Wang, Wei Guo, Wenting Dai   +3 more
doaj   +1 more source

Stress dependent thermal pressurization of a fluid-saturated rock [PDF]

, 2009
Temperature increase in saturated porous materials under undrained conditions leads to thermal pressurization of the pore fluid due to the discrepancy between the thermal expansion coefficients of the pore fluid and of the solid matrix.
AEZ Wissa, AH Lachenbruch, AW Bishop, AW Bishop, AW Bishop, AW Rempel, AW Skempton, AW Skempton, B Gurevich, DA Lockner, DF McTigue, G Mesri, I Vardoulakis, J Fortin, J Sulem, J Sulem, J Sulem, J Sulem, J. Sulem, JB Walsh, JG Berryman, JR Rice, JR Rice, L Dormieux, R Hill, RG Campanella, RK Dropek, RW Zimmerman, S. Ghabezloo, VV Palciauskas   +29 more
core   +5 more sources