Browsing Bergen Open Research Archive by Author "Brattekås, Bergit"
Now showing items 1-12 of 12
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Conformance Control for Enhanced Oil Recovery in Fractured Reservoirs
Brattekås, Bergit (Doctoral thesis, 2014-09-19) -
DarSIA: An Open-Source Python Toolbox for Two-Scale Image Processing of Dynamics in Porous Media
Nordbotten, Jan Martin; Benali, Benyamine; Both, Jakub Wiktor; Brattekås, Bergit; Storvik, Erlend; Fernø, Martin (Journal article; Peer reviewed, 2023)Understanding porous media flow is inherently a multi-scale challenge, where at the core lies the aggregation of pore-level processes to a continuum, or Darcy-scale, description. This challenge is directly mirrored in image ... -
Dos and Don’ts When Developing a System to Investigate Spontaneous Imbibition in Unconsolicdated Porous Media
Brattekås, Bergit; Føyen, Tore Lyngås; Vabø, Trond; Haugland, Håkon; Reite, Simon I.; Saunes, Anders S.; Fernø, Martin (Peer reviewed; Journal article, 2019)This paper describes the development of a consistent model system to measure spontaneous imbibition and determine saturation functions in unconsolidated porous media. Sand grains or glass beads were packed in up to 0.5 m ... -
Explicit tracking of CO2-flow at the core scale using micro-Positron Emission Tomography (μPET)
Brattekås, Bergit; Haugen, Malin (Journal article; Peer reviewed, 2020)Safe subsurface sequestration of carbon dioxide (CO2) is becoming increasingly important to meet climate goals and curb atmospheric CO2 concentrations. The world-wide CO2 storage capacity in carbonate formations is ... -
Increased CO2 storage capacity using CO2-foam
Føyen, Tore Lyngås; Brattekås, Bergit; Fernø, Martin; Barrabino, Albert; Holt, Torleif (Journal article; Peer reviewed, 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 ... -
The Mechanism for Improved Polymer Gel Blocking During Low-Salinity Waterfloods, Investigated Using Positron Emission Tomography Imaging
Brattekås, Bergit; Seright, Randall S. (Journal article; Peer reviewed, 2020)Polymer gels can be placed in fractures within subsurface reservoirs to improve sweep efficiency during subsequent floods, and its success is largely determined by the gel’s ability to completely occupy the fracture volume. ... -
Microscopic and macroscopic assessment of carbonate dissolution for geologic CO2 storage
Cobos Mora, Jacquelin Elizabeth; Folkvord, Olav Parelius; Søgaard, Erik G.; Brattekås, Bergit (Journal article; Peer reviewed, 2023)Carbon capture and storage in underground formations might be considered as a relevant technology to curb anthropogenic climate gas emissions. However, carbon dioxide (CO2) injection can lead to severe rock-fluid interactions ... -
Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples
Haugen, Malin; Folkvord, Olav Parelius; Veien, Torunn; Fernø, Martin; Brattekås, Bergit (Journal article; Peer reviewed, 2023)Carbon dioxide (CO2) sequestration in porous, sedimentary reservoirs is a key technology to mitigate emissions of anthropogenic CO2 and curb irreversible climate change. The abundance of carbonate formations, both as saline ... -
A Review of Polymer Gel Utilization in Carbon Dioxide Flow Control at the Core and Field Scale
Brattekås, Bergit; Seright, Randall S. (Journal article; Peer reviewed, 2023)Polymer gel has been used for water conformance control for several decades and may have significant potential in remediating unfavorable carbon dioxide (CO2) flow in the subsurface. High-mobility CO2 may channel quickly ... -
A systematic investigation of polymer influence on core scale wettability aided by positron emission tomography imaging
Brattekås, Bergit; Sandnes, Martine Folgerø; Steinsbø, Marianne; Cobos Mora, Jacquelin Elizabeth (Journal article; Peer reviewed, 2022)Polymers have been used as viscosifying agents in enhanced oil recovery applications for decades, but their influence on rock surface wettability is rarely discussed relative to its importance: wettability largely controls ... -
Unlocking multimodal PET-MR synergies for geoscience
Brattekås, Bergit; Gauteplass, Jarand; Brekke, Njål; Fernø, Martin; Ersland, Geir (Journal article; Peer reviewed, 2020)The recent combination of positron emission tomography (PET) and magnetic resonance (MR) imaging modalities in one clinical diagnostic tool represents a scientific advancement with high potential impact in geoscientific ... -
Water shutoff and conformance improvement: an introduction
Seright, Randall S.; Brattekås, Bergit (Journal article; Peer reviewed, 2021)This paper provides an introduction to the topic of water shutoff and conformance improvement. After indicating the volumes of water produced during oilfield operations, a strategy is provided for attacking excess water ...