Three-dimensional wetting maps: A novel technique for assessing and applying data from rock-fluid interaction studies
- Univ. of Tulsa, OK (United States)
- Alberta Energy Company (Canada)
The preferential wetting characteristics of crude oil/brine/rock systems play a crucial role in characterizing oil reservoirs and in determining the success of most caustic and alkaline flooding enhanced recovery methods. Three-dimensional wetting maps, a novel new method of quantitatively investigating wetting behavior of importance in enhanced recovery, were generated for a crude oil/brine/silicate rock system by measuring adhesion tension values under anaerobic conditions. Values of adhesion tension for brine solutions with pH`s ranging from 6.0 to 13 and sodium ion concentrations from 1.0 to 10{sup {minus}5} to 1.0 molar were collected. Specific regions to pH and sodium ion concentration were found where the behavior changed from water-wetting to oil-wetting and where stable emulsions were formed. A brine having a pH and sodium ion concentration resulting in oil-wetting behavior was chosen to conduct anaerobic adsorption studies using a specially designed adsorption cell. The components of the oil adsorbed onto the rock in the adsorption cell were removed by an anaerobic soxhlet extraction process. These compounds were analyzed by GC-MS, FTIR, and UV-visible spectroscopy and appear to be mainly asphaltene in nature. The use of wetting map data and adsorption data in the design of water and caustic flood for enhanced oil recovery will be discussed.
- OSTI ID:
- 141333
- Report Number(s):
- CONF-930304-; TRN: 93:003688-1010
- Resource Relation:
- Conference: 205. American Chemical Society national meeting, Denver, CO (United States), 28 Mar - 2 Apr 1993; Other Information: PBD: 1993; Related Information: Is Part Of 205th ACS national meeting; PB: 1951 p.
- Country of Publication:
- United States
- Language:
- English
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