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Muhammad Adeel Nasser Sohals, Department of Chemistry and Bioscience, will defend his thesis on "Enhanced Oil Recovery Based on Ionically Modified Water in Carbonates".
13.01.2017 kl. 13.00 - 16.00
"Enhanced Oil Recovery Based on Ionically Modified Water in Carbonates"
The wettability alteration process depends on the formation water composition, crude oil chemistry, reservoir temperature, rock surface mineralogy and composition of the injected water. The study of all the parameters is important to understand their role in wettability alteration mechanisms, but injected water chemistry is the only that can be tuned at reservoir scale. Therefore, this study principally focused on the investigation of water chemistry effects on wettability including: a) effect of potential scale forming ions on initial wetting conditions, b) effect of ionic composition and strength, c) influence of temperature, d) impact of oxyanions concentration, and e) interfacial tension.
This study used flotation to measure wettability. Comparisons of wettability trends measured by flotation with imbibition showed flotation produced similar results. The experiments used Dan chalk, reservoir oil and synthetic brines were performed at 23, 50 and 100oC. The flotation technique directly measures the wettability and physically separates oil-wet rock from water-wet rock. The resulting measurement is expressed as % water-wet grains. A flotation wettability index (FWI) was defined and works in the same way as Amott wettability index by expressing the wetting condition with a numerical value between completely oil-wet (-1) and water-wet (+1). The technique also allows determination of the amount of oil retained on water-wet surfaces after wettability alteration. The retained oil offers additional information on the wettability alteration mechanisms compared to other wettability measurement techniques.
The experimental results show that changing water chemistry can improve the oil wetness or water wetness. The first effect, improving oil wetting, was found to be associated with an ionic composition, specifically addition of oxyanions, while reducing the ionic strength (dilution) improved the water-wet conditions of the crude-oil-brine (CBR) system. The addition of the oxyanions sulfate and borate shifted the wettability to more oil wet. All the brines had Ca and Mg present so we could not isolate any specific effects associated with the cations. Sulfate was temperature sensitive with little shift at 23 and 50oC as concentration increased, but at 100oC the wettability shift was pronounced from neutral to oil wet. Borate showed less temperature sensitivity and less ability to shift wettability. The wettability shift for both oxyanions was proportional to concentration. Dilution of the brines increased the water-wet conditions up to 10-fold dilution, but further dilutions did not increase water wetting. Dilution changed wettability for formation brines from -0.50 to -0.75 (oil-wet) to -0.25 & 0.0. Increase in temperature shifted the CBR system towards more oil-wet for all the brines tested including the brines without sulfate or borate. The wettability shifted from near neutral-wet to more oil-wet conditions when the temperature increased from 23oC to 100oC. The temperature effect was different depending on oxyanion. Sulfate showed no temperature effect between 23 and 50oC, but showed significant shifting at 100oC with greater shift to oil wet with increasing sulfate concentration. In contrast, borate showed a systematic increase in oil wetting as temperature increased.
The interfacial tension (IFT) between crude oil and advanced fluids was measured at 23 and 90oC. IFT increased for seawater and seawater without sulfate as temperature increased from 23oC to 100oC, but decreased for seawater with borate. The dilutions of all the brines increased the IFT at constant temperature. The lowest IFT was 11.5 mN/m, which is not low enough to improve oil recovery independently without wettability alteration.
Ph.D. and Project Manager, Vural Sander Suicmez, Maersk Oil and Gas A/S, Copenhagen K, Denmark
Department of Chemistry and Bioscience, Section of Chemical Engineering
Niels Bohrs Vej 8, 6700 Esbjerg
26.05.2017 kl. 09.30 - 14.00
All interested are welcome!
26.05.2017 kl. 13.00 - 17.00
Fereshteh Dardmeh will defend her Ph.D. thesis: "Management of low Male Fertility potential affected by obesity and chronic pain with Lactobacillus Rhamnosus PB01"
29.05.2017 kl. 00.00 - 02.06.2017 kl. 00.00
Anvendt Filosofi udbyder en uges sommerkursus i rammen af Erasmus Plus-Programmet om ”Feminist Political Philosophy and PBL”. Kurset er det tredje af i alt fire kurser, der behandler emnet ”Gender and Philosophy”. Sommerkurset er et samarbejde mellem Reykjavík Universitet, Universitetet i Yväskulä, Universitetet i Oslo og Aalborg Universitet.
29.05.2017 kl. 09.00 - 12.45
Find fejlene, FØR du bygger - og få både bedre og billigere byggeri. Erfaringerne viser, at der er mange penge at hente. Kurset udbydes i samarbejde med Molio.
29.05.2017 kl. 10.00 - 17.00
International Workshop and PhD Seminar on Interdisciplinary Approaches to Abduction
29.05.2017 kl. 13.00 - 16.00
29.05.2017 kl. 13.00 - 17.00
Mette Trads will defend her Ph.D. thesis: "Preventing post-operative constipation in elderly orthopedic patients – a challenge in fundamental nursing care"
30.05.2017 kl. 09.00 - 14.00
"Negotiating the Past: Contextualising Historical Television Drama". All interested are welcome!
30.05.2017 kl. 09.00 - 18.00
Coastal cities and towns are facing urbanization challenges. This goes for those large cities exposed to population growth and mass tourism, but also those coastal towns facing the opposite – loss of population and work places; reduced competitiveness concerning attracting citizens and tourists.
30.05.2017 kl. 10.00 - 12.00
A guest lecture by Emanuele Castano, Professor and Chair of the Psychology Department of the New School for Social Research, New York
30.05.2017 kl. 13.00 - 18.00
AFHANDLINGENS TITEL: ”NETWORK DYNAMICS IN AN INTERORGANIZATIONAL TELEMEDICINE NETWORK. A LONGITUDINAL QUALITATIVE CASE STUDY OF THE LARGE-SCALE TELECARE NORTH PROGRAM” FORELÆSNINGENS TEMA: ”How can we understand political dynamics in inter-organizational network and what are the practical implications?”
30.05.2017 kl. 15.00 - 17.00
Institut for Planlægning samt Center for Design, Innovation og Bæredygtig Omstilling (DIST), Aalborg Universitet, lancerer et nyt undervisningsmateriale om økologisk økonomi. Det vil vi gerne markere med et arrangement tirsdag d. 30. maj 2017 kl. 15-17 på Aalborg Universitet København - alle er velkomne
31.05.2017 kl. 08.30 - 16.00
På workshoppen gennemgås Totalkonceptet som metode til opnåelse af omkostningseffektive energibesparelser i virksomhedernes bygninger
31.05.2017 kl. 11.30 - 12.00
"Attention in Rodents: Pharmacology and the Role of the Frontoparietal Network" by PhD Fellow Andrew Hayward, Faculty of Medicine, Biology and Health, University of Manchester, England.
31.05.2017 kl. 13.00 - 14.30
We invite colleagues and students to the seminar "Duty vs. Desire: Internalization of Role-related Expectations over Development among Indian and American Children and Their Parents"