Studies on low salinity oil recovery have accelerated in recent years. Detailed focus has been put understanding competing underlying mechanisms behind observed improved recovery. The main aim this work is to tune the ionic composition of imbibing brine maximize from spontaneous imbibition experiments limestone outcrop cores, as an analogue for offshore Brazilian carbonate reservoir. Improved w...

The gas/fluid flowing behavior and fluid distribution under capillary forces in porous media are essential for evaluating the pore-fracture characteristics of coal. Capillary force is crucial flow-back efficiency after hydraulic fracturing during enhanced coalbed methane (CBM) production. In this work, situ dynamic X-ray micro-computed tomography (X-ray ?-CT), field emission scanning electron m...

Abstract A numerical model is investigated representing counter-current spontaneous imbibition of water to displace oil or gas from a core plug. The based on mass and momentum conservation equations in the framework theory mixtures. We extend previous that included fluid–rock friction fluid–fluid drag interaction (viscous coupling) by including fluid compressibility Brinkman viscous terms. Gas ...

Previous micro-scale studies of the effect pore structure on spontaneous imbibition are mainly limited to invariable-diameter capillaries. However, in real oil and gas reservoir formations, capillary diameters changing interconnected. Applying lattice Boltzmann color gradient two-phase flow model parallel computation CPUs, we simulated variable-diameter We explored reasons for nonwetting phase ...