T
Tor Austad
Researcher at University of Stavanger
Publications - 98
Citations - 9968
Tor Austad is an academic researcher from University of Stavanger. The author has contributed to research in topics: Enhanced oil recovery & Seawater. The author has an hindex of 48, co-authored 97 publications receiving 8427 citations.
Papers
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Journal ArticleDOI
Wettability alteration and improved oil recovery by spontaneous imbibition of seawater into chalk: Impact of the potential determining ions Ca2+, Mg2+, and SO42−
TL;DR: In this article, a chemical mechanism discussing the mutual interaction between the potential determining ions and the chalk surface was proposed to improve the water wetness of biogenic chalk from a spontaneous imbibition point of view.
Proceedings ArticleDOI
Chemical Mechanism of Low Salinity Water Flooding in Sandstone Reservoirs
TL;DR: Based on published data and new experimental results on core flooding, effects of pH and salinity on adsorption of acidic and basic organic components onto different clay minerals, clay properties like ion exchange capacity and selectivity, and oil properties, a new chemical mechanism is suggested, which agrees with documented experimental facts as mentioned in this paper.
Journal ArticleDOI
Wettability alteration in chalk 2. Mechanism for wettability alteration from oil-wet to water-wet using surfactants
Dag Chun Standnes,Tor Austad +1 more
TL;DR: In this paper, a mechanism for wettability alteration from oilwet to water-wet using surfactants was proposed, where the surfactant was applied to the water surface.
Journal ArticleDOI
Smart Water as Wettability Modifier in Carbonate and Sandstone: A Discussion of Similarities/Differences in the Chemical Mechanisms
TL;DR: In this paper, the suggested mechanisms for the wettability modification in the two types of reservoir rocks were discussed both in carbonates and especially in sandstones, and the suggested mechanism behind the wetability alteration promoted by the injected water has been a topic for discussion.
Journal ArticleDOI
Wettability and oil recovery from carbonates: Effects of temperature and potential determining ions
Peimao Zhang,Tor Austad +1 more
TL;DR: In this paper, a series of long-term spontaneous imbibition tests were conducted at 70, 100 and 130°C using oil containing chalk cores which were close to neutral wetting conditions.