Imbibition studies of low-permeability porous media

A systematic investigation of capillary pressure, relative permeability, and fluid flow characteristics within diatomite (a high porosity, low permeability, siliceous rock) is reported. Using an X-ray computerized tomography (CT) scanner, and a specially constructed imbibition cell, we study spontaneous cocurrent water imbibition into diatomite samples at various initial water saturations. Air-water and oil-water systems are used. Despite a marked difference in rock properties between diatomite and sandstone, including permeability and porosity, we find similar trends in saturation profiles and dimensionless weight gain versus time functions. Diatomite is roughly 100 times less permeable than sandstone, yet it imbibes water at rates rivaling sandstone. Importantly, the spontaneous imbibition data when combined with CT-scan images provides a means to determine dynamic relative permeability and capillary pressure functions


Yılmaz, Levent; GURKAN, T; GULCAT, U (1983-01-01)
Anomalous diffusion of liquid penetrants in glassy polymers is formulated as a moving boundry problem. The concept of volume average velocity is utilized in mathematical modelling. The model equation is solved using a method which is a combination of the method of lines and the method of invariant imbedding. The results are shown to be in agreement with the existing experimental observations.
Flotation responses to the morphological properties of particles measured with three-dimensional approach
Hicyilmaz, C; Ulusoy, U; Bilgen, S; Yekeler, M (2005-02-07)
Morphological properties of barite particles ground by autogenous and ball milling were examined by three-dimensional methods, namely, Brunauer-Emmett-Teller (BET) nitrogen adsorption and Permaran methods in terms of surface roughness and acuteness, respectively. The experimental study showed that autogenously ground products have lower roughness and acuteness. On the other hand, Hallimond tube flotation tests were performed to evaluate the floatability of those particles ground in different environments. M...
Direct measurement of molecular stiffness and damping in confined water layers
We present direct and linear measurements of the normal stiffness and damping of a confined, few molecule thick water layer. The measurements were obtained by use of a small amplitude (0.36 Angstrom), off-resonance atomic force microscopy technique. We measured stiffness and damping oscillations revealing up to seven molecular layers separated by 2.526+/-0.482 Angstrom. Relaxation times could also be calculated and were found to indicate a significant slow-down of the dynamics of the system as the confining...
Effect of boundary conditions and workpiece geometry on residual stresses and microstructure in quenching process
Gür, Cemil Hakan; Schuler, W (1996-11-01)
In this study, the internal and residual stress states in quenched C60 steel cylinders are analyzed both numerically and experimentally in order to investigate the effects of boundary conditions (such as quench severity and temperature of quench bath) and specimen geometry Specimen geometry has been analyzed by introducing a hole in a cylinder arid varying hole diameter and its' eccentricity. In the numerical analysis, the finite element method is applied and both temperature gradients and Phase transformat...
Effect of soft fine particles on the kinetics and energetics of grinding hard coarse particles
Yılmaz, Selim; Hoşten, Çetin; Department of Mining Engineering (2016)
The main objective of this study is to investigate breakage parameters of a narrow size fraction of coarse particles of a hard mineral when ground in a mixture with fine particles of a soft mineral. For this purpose, quartz and calcite were selected as mixture components varying appreciably in hardness (quartz mohs scale:7 and calcite mohs scale:3) but having quite similar densities. Mixture feeds comprised of -1.18+0.85 mm quartz (hard and coarse) and -106 µm calcite (soft and fine) at various proportions ...
Citation Formats
S. Akın, “Imbibition studies of low-permeability porous media,” presented at the SPE Western Regional Meeting 1999, WRM 1999, (26 - 27 Mayıs 1999), Alaska, Amerika Birleşik Devletleri, 1999, Accessed: 00, 2021. [Online]. Available: