Blar i UiS Brage på forfatter "Stray, Helge"
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Stability assessment of PITT tracer candidate compounds: the case of benzyl alcohols
Silva, Mario; Stray, Helge; Bjørnstad, Tor (Journal article; Peer reviewed, 2018-04)The selection of compounds used as inter-well tracers has traditionally been done taking into consideration the goal of the test and the ease in analyzing the chemicals used. This often led to improper selection of the ... -
Thermal stability and interactions with sedimentary rocks under typical reservoir conditions of selected pyridines investigated as phase partitioning tracers
Silva, Mario; Stray, Helge; Ould Metidji, Mahmoud; Bjørnstad, Tor (Journal article, 2021)Pyridine, 2-hydroxy-6-methylpyridine, 3-hydroxypyridine, and 4-methoxypyridine are evaluated as potential phase-partitioning oil field tracers. Their stability is tested in a brine for 12 weeks at temperatures between 25 ... -
Variation of the partition coefficient of phase-partitioning compounds between hydrocarbon and aqueous phases: an experimental study.
Silva, Mario; Stray, Helge; Ould Metidji, Mahmoud; Bjørnstad, Tor (Peer reviewed; Journal article, 2021)Many non-ionic chemical compounds will form real solutions in equilibrium between two immiscible phases in contact. The partition coefficient (K) is defined as the quotient between the equilibrium concentration of the ...