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Postboks 159 9100 Aalborg
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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
17.01.2017 kl. 09.00 - 06.02.2017 kl. 16.00
Efteruddannelsen i radonrenovering kvalificerer dig til at få adgang til det voksende marked for radonrenovering. Underviserne er de førende eksperter fra Teknologisk Institut og Statens Byggeforskningsinstitut (SBi). Efteruddannelsen varer tre dage.
23.01.2017 kl. 09.00 - 25.01.2017 kl. 18.00
TotalConcept er en metode til at opnå omkostningseffektive energibesparelser i erhvervsejendomme. Metoden og dens tilknyttede værktøjer hjælper med at identificere potentialet for energibesparelser og håndtere disse ud fra en forretningsmæssig tilgang.
24.01.2017 kl. 09.00 - 25.01.2017 kl. 16.00
Få Bygningsreglementet gennemgået og forklaret af forfatterne til den helt nye SBi-anvisning 258 om BR15.
25.01.2017 kl. 09.00 - 27.01.2017 kl. 16.00
This workshop aims to explore the ways in which ongoing research can be translated into publications in high ranking international journals across disciplines.
26.01.2017 kl. 15.30 - 18.30
Marianne Riis will defend her PhD thesis: Avatar-mediation and transformation of practice in a 3d virtual world - Meaning, identity, and learning.
27.01.2017 kl. 10.00 - 12.00
“Who holds the cards in EU Cohesion Policy? The clash of Multi-Level Governance, Agency and Path Dependency with Institutional Entrepreneurship. The case of Interact, Interreg and cross-border funds.”
30.01.2017 kl. 10.00 - 17.00
The Centre for Cultural Psychology, Department of Communication and Psychology, is honoured to invite you to the international workshop 'The Work of Schooling: A View from Cultural Psychology'.
30.01.2017 kl. 13.00 - 16.00
Klinisk Institut, Aalborg Universitet og Aalborg Universitetshospital har den glæde at invitere til ph.d.-forsvar ved Anne Pernille Toft-Petersen, Klinisk Institut, som forsvarer ph.d.-afhandlingen: COPD exacerbations – assisted ventila-tion, haemoglobin and prognosis
31.01.2017 kl. 12.00 - 16.10
Nordjylland på vej med bedre evidensgrundlag og integrerede strategier
31.01.2017 kl. 13.00 - 16.00
31.01.2017 kl. 13.00 - 17.00
SBi’s Boligdag 2017 sætter fokus på, hvordan vi kan drage nytte af mangfoldighed. Hvordan kan mangfoldigheden styrke en positiv udvikling i udsatte boligområder, og hvordan vi kan sikre sammenhængende byer og boligområder, hvor vi mødes på tværs?
31.01.2017 kl. 13.00 - 17.00
TITLE OF THE THESIS: “THE FAMILY AS PROVIDER OF WELFARE. THE ROLE OF GENDER AND THE FAMILY IN WELFARE OPINIONS, PREFERENCES, ACTIONS AND OUTCOMES”
02.02.2017 kl. 13.30 - 17.30
02.02.2017 kl. 16.30 - 18.00
Åbent møde for dig, der overvejer at søge ind på Kandidatuddannelsen i Læring og Forandringsprocesser i efteråret 2017. Kom og få svar på ALT om studieformer, fagligt indhold, optagelseskrav mv.
07.02.2017 kl. 09.00 - 12.00
På kurset får du den seneste viden om, hvordan du kan lægge en strategi for at nedbringe PCB-koncentrationen i indeklimaet.