... cannot be sustained [16] . saturation fracture network sagd thermal expansion fracture co 2 liberation matrix block enhanced recovery reservoir relative permeability steam injection oil recovery steam-assisted gravity drainage reaction imbibition recovery mechanism fractured...

... imbibition can be used to stabilize the waterflood and improve oil recovery. Waterflooding can therefore be a viable non-thermal enhanced oil recovery technology even in fields with very high oil viscosity. Introduction The Canadian deposits of heavy oil and bitumen are some of the largest in the world...

... Abstract Capillary imbibition is one of the major recovery mechanisms in naturally fractured reservoirs (NFR) where most of the oil is stored in tight matrices. Most of the imbibition studies of NFR assume uniform distribution of fractures. However, in reality most of NFR are partially...

... simulation. Free imbibition in fractured system was also investigated and compared favorably with pore network simulation. This process first involves the rapid invasion of the matrix, followed by the subsequent penetration of the fracture. A simplified theory was also developed for the experiments. All...

... the fractal properties and displacement type. A few capillary imbibition experiments showing an invasion percolation (IP) type displacement were conducted first. Diffusion type displacement resulted in diffusion limited aggregation (DLA) type patterns. Conditions yielding different types of displacement...

... Abstract Matrix-fracture interaction due to capillary forces (spontaneous imbibition) is a commonly encountered process in fractured subsurface reservoirs during oil, gas, and geothermal fluid recoveries and contaminant transport. It occurs in counter-current manner if the interaction between...

... influx was investigated in 47 core plugs, including 29 sandstone plugs from different areas, 2 Berea sandstone plugs and 16 carbonate plugs. Over 100 different experiments were performed, including spontaneous water imbibition and forced water imbibition tests, primary imbibition and secondary imbibition...

... Abstract Capillary (spontaneous) imbibition recovery in naturally fractured reservoirs can be enhanced by adding surfactant into injected water. Selection of proper surfactant type and concentration is essential in this process as the reduction in IFT by addition of surfactant does not always...

... Abstract Conventional Capillary Number theory predicts that residual oil will not be mobilized until a critical capillary number (2E-05) is exceeded. This theory was tested to determine residual oil saturation mobilization after the forced water imbibition. In the literature, high residual oil...

... Abstract Spontaneous imbibition plays a very important role in the displacement mechanism of non-wetting fluid in naturally fractured reservoirs. We developed a new 2D two-phase finite element numerical model, as available commercial simulators cannot be used to model small-scale experiments...

... of the hysterisis phenomena on the flow in porous media we performed experimental tests and analytical studies. We measured for different formations the relative permeabilities in the imbibition and drainage cycle, using oil and water. We monitored the rates and pressures at the inlet and outlet points of the rock...

... Abstract Knowledge of gas saturation history is very important in determining gas recovery from gas reservoirs with water influx. Water imbibition is known to control gas recovery. Spontaneous imbibition experiments have been traditionally employed to determine gas saturation. On-line NMR...

... Abstract An experimental method was developed to measure both steam-water and air-water capillary pressures using an X-ray CT technique. We conducted spontaneous water imbibition and gravity drainage in ceramic core samples for steam-water and air-water systems respectively. The results were...