residual gas saturation is one of the most important parameter in determining recovery factor of water-drive gas reservoir. visual observation of processes occurring at the pore level in micromodels can give an insight to fluid displacements at the larger scale and also help the interpretation of production performance at reservoir scale. in this study experimental tests in a glass micromodel w...

We propose an experimental methodology to visualize asphaltene precipitation in the pore space of rocks and assess reduction permeability. perform core flooding experiments integrated with X-ray microtomography (micro-CT). The simultaneous injection pure heptane crude oil containing induces space. degree is controlled by measurement differential pressure across sample. After precipitation, dope...

Compared with bulk soil, rhizosphere has different properties because of the existence root mucilage, which affects physical, chemical, and microbial processes. The slow response to changes in water potential buffers content leads be wetter than soil during drying. By affecting connectivity liquid gas phases, mucilage can also influence solute transport diffusion. Overview literature previous m...

Several methodologies published in the literature can be used to construct realistic pore networks for simple rocks, whereas in complex pore geometry formations, as formed in tight reservoirs, such a construction still remains a challenge. A basic understanding of pore structure and topology is essential to overcome the challenges associated with the pore scale modeling of tight porous media. A...

A long-standing issue in subsurface hydrology and many other related disciplines has been the scaling problem. Although effect of length scale known for years, inconsistent results have reported literature. Experimental data mostly indicate that permeability k should increase with increasing sample volume, whereas simulations some theoretical predictions appear to imply opposite. In this paper,...

Seismic velocities in rocks at ultrasonic frequencies depend not only on the degree of saturation but also on the distribution of the fluid phase at various scales within the pore space. Two scales of saturation heterogeneity are important: (1) saturation differences between thin compliant pores and larger stiffer pores, and (2) differences between saturated patches and undersaturated patches a...