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Wettability Alteration and Foam Mobility Control in a Layered 2-D Heterogeneous Sandpack
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Robert Feng Hirasaki, George J. |
| Copyright Year | 2011 |
| Abstract | In a layered 2-D heterogeneous sandpack with a 19:1 permeability contrast that was preferentially oil-wet, the recovery by waterflood was only 49.1% of original oil-in-place (OOIP) due to injected water flowing through the high-permeability zone leaving the low-permeability zone unswept. In order to enhance oil recovery, an anionic surfactant blend (NI) was injected that altered the wettability and lowered the interfacial tension (IFT). Once IFT was reduced to ultra-low values, the adverse effect of capillarity retaining oil was eliminated. Gravity-driven vertical counter-current flow then exchanged fluids between highand low-permeability zones during a 42-day system shut-in. Cumulative recovery after a subsequent foamflood was 94.6% OOIP even though foam strength was weak. Recovery with chemical flood (incremental-recovered-oil/waterflood-remaining-oil) was 89.4%. An alternative method is to apply foam mobility control as a robust viscous force dominant process with no initial surfactant injection and shut-in. The light crude oil studied in this paper was extremely detrimental to foam generation. However, the addition of lauryl betaine to NI at a weight ratio of 1:2 (NI : lauryl betaine), made the new NIB blend a good foaming agent with and without the presence of the crude oil. NIB by itself as an IFT reducing and foaming agent is shown to be effective in various secondary and tertiary alkaline/surfactant/foam (ASF) processes in water-wet 1-D homogeneous sandpacks, and in an oil-wet, heterogeneous layered system with a 34:1 permeability ratio. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://porousmedia.rice.edu/resources/SPE-141462-MS-P%5B1%5D.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | ASF+SDF Meta-Environment Aperture grille Betaine Capillarity Departure - action Flow Genetic Heterogeneity Homebound Persons In-place algorithm Increment Interface Builder Interfacial Force Layered system Liquid substance Microsoft Blend Mineral Oil 1000 MG/ML Enema OpenFOAM Petroleum Tension Headache Transcutaneous electrical nerve stimulation anatomical layer betaine-homocysteine methyltransferase nickel |
| Content Type | Text |
| Resource Type | Article |
