Blar i SINTEF Open på forfatter "Holt, Torleif"
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CO2 mobility reduction using foam stabilized by CO2- and water-soluble surfactants
Føyen, Tore Lyngås; Alcorn, Zachary Paul; Fernø, Martin; Barrabino, Albert; Holt, Torleif (Peer reviewed; Journal article, 2020)Foam can reduce CO2 mobility to improve the sweep efficiency during injection into subsurface geological formations for CO2 storage and enhanced oil recovery. However, CO2 foams are thermodynamically unstable, so they must ... -
Concentration and Temperature Effects on Water and Salt Permeabilities in Osmosis and Implications in Pressure-Retarded Osmosis
Sivertsen, Edvard; Holt, Torleif; Thelin, Willy (Journal article; Peer reviewed, 2018)Osmotic power extracted from the mixing of freshwater with seawater is a renewable energy resource that has gained increasing attention during recent years. The estimated energy can significantly contribute to the production ... -
An Evaluation of Graphene Oxides as Possible Foam Stabilizing Agents for CO2 Based Enhanced Oil Recovery
Barrabino, Albert; Holt, Torleif; Lindeberg, Erik (Peer reviewed; Journal article, 2018)Graphene oxide, nanographene oxide and partially reduced graphene oxide have been studied as possible foam stabilizing agents for CO2 based enhanced oil recovery. Graphene oxide was able to stabilize CO2/synthetic sea water ... -
First Approach to Measure Interfacial Rheology at High-Pressure Conditions by the Oscillating Drop Technique
Barrabino, Albert; Holt, Torleif; Bjørkvik, Bård Johan Arnt; Lindeberg, Erik Gøsta Brun (Peer reviewed; Journal article, 2021)An oscillating drop rheometer capable of operating under conditions of high pressure and high temperature has been built. The oscillating drop mechanism was able to support pressures as high as 1300 bar and successfully ... -
Identification of Nanocellulose Retention Characteristics in Porous Media
Aadland, Reidun Cecilie Grønfur; Dziuba, Carter Jordan; Heggset, Ellinor Bævre; Syverud, Kristin; Torsæter, Ole; Holt, Torleif; Gates, Ian D.; Bryant, Steven (Peer reviewed; Journal article, 2018)The application of nanotechnology to the petroleum industry has sparked recent interest in increasing oil recovery, while reducing environmental impact. Nanocellulose is an emerging nanoparticle that is derived from trees ... -
Increased CO2 storage capacity using CO2 -foam
Føyen, Tore Lyngås; Brattekås, Bergit; Fernø, Martin; Barrabino, Albert; Holt, Torleif (Peer reviewed; Journal article, 2020)Reduction of the CO2 mobility is beneficial during subsurface sequestration of anthropogenic CO2 in saline aquifers and hydrocarbon reservoirs by mitigating flow instabilities leading to early gas breakthrough and poor ... -
Partitioning of non-ionic surfactants between CO2 and brine
Barrabino, Albert; Holt, Torleif; Lindeberg, Erik Gøsta Brun (Peer reviewed; Journal article, 2020)The partitioning of non-ionic surfactants in a CO2/synthetic brine system was studied for a selection of surfactants at reservoir conditions for CO2 enhanced oil recovery and aquifer storage. Alkyl and alkylphenol ethoxylates ... -
Polymer Gels Made with Functionalized Organo-Silica Nanomaterials for Conformance Control.
Najafiazar, Bahador; Wessel-Berg, Dag; Bergmo, Per Eirik Strand; Simon, Christian; Yang, Juan; Torsæter, Ole; Holt, Torleif (Journal article; Peer reviewed, 2019)Deep placement of gel in waterflooded hydrocarbon reservoirs may block channels with high water flow and may divert the water into other parts of the reservoir, resulting in higher oil production. In order to get the gel ... -
Pressure Dependency of the Membrane Structure Parameter and Implications in Pressure Retarded Osmosis (PRO)
Holt, Torleif; Sivertsen, Edvard; Thelin, Willy; Brekke, Geir (Chapter; Peer reviewed, 2018)Pressure retarded osmosis (PRO) can be used to exploit the mixing energy e.g. between river water and sea water. A PRO membrane must be highly permeable for water, whereas salt ions should be retained. Furthermore, the ...