Results 241 to 250 of about 522,196 (302)

A Pore-Pressure Equation for Carbonates

SPE Drilling & Completion, 2020
Summary A new pore-pressure prediction equation for carbonate formations was developed following the compressibility method previously known. The main goal of this research was motivated by the lack of specialized information needed to apply such a method.
Juan P. Morales-Salazar, Fernando Samaniego-Verduzco, Mario G. García-Herrera   +2 more
openaire   +1 more source

A Global Algorithm for Pore Pressure Prediction

Proceedings of Middle East Oil Show, 1993
Abstract The problem of prediction of in-situ pore pressure (ahead of the bit), on the basis of seismic data, has had a long history of study. It was recognized early that low seismic velocity in a given interval can be caused by high pore pressure in that interval.
D. Scott, L. Thomsen
openaire   +1 more source

Pressurized 4He in Cylindrical and in Hexagonal Pores

Journal of Low Temperature Physics, 2006
We give a variational Monte Carlo description at T = 0 K of 4He filling under pressure a porous glass within the shadow wave function technique. We have considered as confining media two different smooth pores, one with a circular cross-section of radius R = 13 A resembling a Gelsil pore, and the other with a hexagonal cross–section of side S = 14 A ...
M. Rossi, D. E. Galli, L. Reatto
openaire   +1 more source

Effective stress and pore pressure

1995
Total stress is the stress acting on a plane, assuming the soil to be a solid material. For the small soil element shown in Figure 4.1, at a depth z below ground level, the vertical total stress, σv, would be the stress acting on the horizontal surface of the element.
openaire   +1 more source

Relationship Between Fracture Propagation Pressure And Pore Pressure

SPE Annual Fall Technical Conference and Exhibition, 1977
Abstract Fracture stimulation data have been analyzed in conjunction with reservoir pressure buildup surveys to investigate the relationship between pore pressure and fracture propagation pressure in the geopressured Vicksburg formation in South Texas.
openaire   +1 more source

Pore Water Pressure

2018
The pressure of the pore water in a porous material is a measure of the state of the water.
openaire   +1 more source

Osmosis in leaky pores: the role of pressure

Proceedings of the Royal Society of London. B. Biological Sciences, 1989
Abstract Osmosis in leaky pores is often considered to involve gradients of pressure that originate from concentration gradients at the pore wall. These postulated surface pressures are incompatible with the Boltzmann equation and result from an incorrect application of the Gibbs–Duhem equation to binary solutions near surfaces.
openaire   +2 more sources

Consolidation Around Pore Pressure Meters

Journal of Applied Physics, 1953
Response of pore pressure meter on variations in loading conditions of surrounding soil is retarded by the necessity that pore water has to enter the instrument. This property is introduced as an instruments coefficient influencing the boundary conditions.
openaire   +1 more source

Movement of Pore Water, and Abnormally High Pore Pressures

1981
The distinction between ground water and pore water may not be very logical, but it has the merit of distinguishing the readily-exploitable fresher pore water near the surface from the brackish to salty water in the pore spaces of most sedimentary rocks at greater depth.
openaire   +1 more source

Pore pressure review

2021
Robert S. Gullco, Malcolm Anderson
openaire   +1 more source