Understanding Chemical-Potential-Related Transient Pore-Pressure Response To Improve Real-Time Borehole (In)Stability Predictions

2002 ◽  
Vol 41 (07) ◽  
Author(s):  
U.A. Tare ◽  
F.K. Mody ◽  
A.I. Mese
Keyword(s):  
Real Time ◽  
Pore Pressure ◽  
Chemical Potential ◽  
Pressure Response ◽  
Pore Pressure Response

Interpreting pore-water pressure changes induced by water table fluctuations and mechanical loading due to soil moisture changes

2012 ◽  
Vol 49 (3) ◽  
pp. 357-366 ◽  
Author(s):  
Collins Ifeanyichukwu Anochikwa ◽  
Garth van der Kamp ◽  
S. Lee Barbour
Keyword(s):  
Soil Moisture ◽  
Pore Pressure ◽  
Mechanical Loading ◽  
Water Table ◽  
Pressure Response ◽  
Stress Strain ◽  
Near Surface ◽  
Water Table Fluctuations ◽  
Pore Pressure Response ◽  
Pressure Changes

Pore pressures within saturated subsurface formations respond to stress changes due to loading as well as to changes in pore pressure at the boundaries of the formation. The pore-pressure dynamics within a thick aquitard in response to water table fluctuations and mechanical loading due to soil moisture changes have been simulated using a coupled stress–strain and groundwater flow finite element formulation. This modelling approach isolates the component of pore-pressure response of soil moisture loading from that caused by water table fluctuations, by using a method of superposition. In this manner, the contributions to pore-pressure fluctuations that occur as a result of surface moisture loading (e.g., precipitation, evapotranspiration) can be isolated from the pore-pressure record. The required elastic stress–strain properties of the aquitard were obtained from the measured pore-pressure response to barometric pressure changes. Subsequently, the numerical simulations could be calibrated to the measured response by adjusting only the hydraulic conductivity. This paper highlights the significance of moisture loading effects in pore-pressure observations and describes an efficient technique for obtaining in situ stress–strain and hydraulic properties of near-surface aquitards.

Pore pressure response of seabed in standing waves and its mechanism

2014 ◽  
Vol 91 ◽  
pp. 213-219 ◽  
Author(s):  
Hu Wang ◽  
Hong-jun Liu ◽  
Min-sheng Zhang
Keyword(s):  
Pore Pressure ◽  
Standing Waves ◽  
Pressure Response ◽  
Pore Pressure Response
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