الفهرس 
abstractOnly 14 pages are availabe for public view
 |  | from | 122 |  |  |
| | | from | 122 | | |
Abstract
Previous investigators have pointed out that imbibition might be the dominant displacement process in the waterflooding of reservoirs characterized by extreme differences in permeability. The performance and success of a waterflooding project depend on how rapid the imbibition process is. It is therefore important in the evaluation of waterflooding prospects to develop a thorough understanding of quantitative interrela¬tions of the factors which control the velocity and extent of capillary imbibition under reservoir conditions. Imbibition rate has also been suggested as a measure of wettability.
In order to investigate the effect of temperature on imbibition
rates and extent, equipment has been designed and built to measure the volume of oil produced vs. time for countercurrent, radial imbibition of water into a cylindrical sandstone core with a hole along its axis. The imbibition process occurs only through the surface area of the hole and the ejected oil is produced back into this hole. Measurements were per¬formed using cores of Berea and Bandera sandstones having different absolute permeabilities. White mineral oil (No. 15 and No. 3) and dis¬tilled water were used as non-wetting and wetting phases, respectively. During the third set of runs, naphthenic acids dissolved in white mineral oil No. 15 were used as the non-wetting phase, while distilled water was still the wetting phase. Such a solution is used to simulate a crude oil containing surface-active material.