Foam flooding (or injection of foam) is a common technology to enhance oil recovery. Although the effects of permeability on foam flooding were well studied in many laboratory experiments, little research has been focused on the specificity of low permeability. In this paper, a series of constant-quality nitrogen foam flow experiments were conducted to investigate the effects of permeability on...

Metamaterials offer unprecedented flexibility for manipulating the optical properties of matter, including the ability to access negative index1–4, ultrahigh index5 and chiral optical properties6–8. Recently, metamaterials with near-zero refractive index have attracted much attention9–13. Light inside such materials experiences no spatial phase change and extremely large phase velocity, propert...

Study of permeability of Fibrous Composites is important in several natural and industrial processes in mechanical engineering. In this study, a comprehensive mathematical model is presented for calculation of normal permeability of ordered elliptical fibrous media. An innovative scale-analysis technique is employed for determining the normal permeability of elliptical fibrous media. In this te...

klinkenberg permeability is an important parameter in tight gas reservoirs. there are conventional methods for determining it, but these methods depend on core permeability. cores are few in number, but well logs are usually accessible for all wells and provide continuous information. in this regard, regression methods have been used to achieve reliable relations between log readings and klinke...

stress waves contain useful information about the properties of porous materials; they can be recovered through different non-destructive testing methods such as crosswell, vertical seismic profile, borehole logging as well as sonic tests. in all these methods, it is crucial to assess the effects of frequency on wave attributes including velocity and intrinsic attenuation. the dependency of per...

An analytical solution for moisture dynamic during freeze-drying based in non-ideal Darcy’s law that resolves the singularity at zero time was deducted. The is represented by a pseudo permeability (K∗) and deviation index (n). must be complemented with numerical of Fourier’s equations heat transfer two product zones. model fitted to experimental dynamics an orange juice-based cake. obtained K∗=...

Abstract Surfactants formulated into oil-based mud can adsorb to pore surfaces causing changes in rock wettability, which are widely believed impair formation permeability when invades the near-wellbore region. In present study, effects of with Versawet and Versacoat surfactants, on petrophysical properties wettability drilling cutting samples from sandstone reservoirs were investigated through...

INDEX OF SYMBOLS A Area enclosed by coil a Coil mean radius b Coil axial thickness c Coil radial thickness D Side length of square coil d Wire-to-wire spacing K Nagoaka coil constant l Coil length p Perimeter enclosed by coil P, F Grover disk coil constants R Circular wire radius s Side length of generic polygon w Trace width x, y Mean side lengths of rectangular coil μo Magnetic permeability o...