Blar i Bergen Open Research Archive på forfatter "Ersland, Geir"
-
Core-scale sensitivity study of CO2 foam injection strategies for mobility control, enhanced oil recovery, and CO2 storage
Alcorn, Zachary Paul; Fredriksen, Sunniva; Sharma, Mohan; Føyen, Tore Lyngås; Wergeland, Connie; Fernø, Martin; Graue, Arne; Ersland, Geir (Journal article; Peer reviewed, 2020)This paper presents experimental and numerical sensitivity studies to assist injection strategy design for an ongoing CO2 foam field pilot. The aim is to increase the success of in-situ CO2 foam generation and propagation ... -
Demonstrating the potential of CO2 hydrate self-sealing in Svalbard, Arctic Norway
Almenningen, Stian; Hussain, Arif; Betlem, Peter; Roy, Srikumar; Senger, Kim; Ersland, Geir (Peer reviewed; Journal article, 2019-10)Here we report the potential self-sealing properties of CO2 hydrate for the Longyearbyen CO2 Lab’s shallow aquifer in Svalbard, Arctic Norway, through hydrate formation experiments. The experiments were conducted on a 9 cm ... -
Effect of Mineral Composition on Transverse Relaxation Time Distributions and MR Imaging of Tight Rocks from Offshore Ireland
Almenningen, Stian; Srikumar, Roy; Hussain, Arif; Seland, John Georg; Ersland, Geir (Journal article; Peer reviewed, 2020)In this paper, we investigate the effect of magnetic field strength on the transverse relaxation time constant (T2) in six distinct core plugs from four different rock types (three sandstones, one basalt, one volcanic tuff ... -
Effects of salinity on hydrate stability and implications for storage of CO2 in natural gas hydrate reservoirs
Husebø, Jarle; Ersland, Geir; Graue, Arne; Kvamme, Bjørn (Peer reviewed; Journal article, 2009-02)The win-win situation of CO2 storage in natural gas hydrate reservoirs is attractive for several reasons in addition to the associated natural gas production. Since both pure CO2 and pure methane form structure I hydrate ... -
Hydrate Plugging and Flow Remediation during CO2 Injection in Sediments
Gauteplass, Jarand; Almenningen, Stian; Barth, Tanja; Ersland, Geir (Journal article; Peer reviewed, 2020)Successful geological sequestration of carbon depends strongly on reservoir seal integrity and storage capacity, including CO2 injection efficiency. Formation of solid hydrates in the near-wellbore area during CO2 injection ... -
Magnetic Resonance Imaging of Methane Hydrate Formation and Dissociation in Sandstone with Dual Water Saturation
Almenningen, Stian; Fotland, Per; Ersland, Geir (Peer reviewed; Journal article, 2019-08-22)This paper reports formation and dissociation patterns of methane hydrate in sandstone. Magnetic resonance imaging spatially resolved hydrate growth patterns and liberation of water during dissociation. A stacked core ... -
Measurements of CH4 and CO2 relative permeability in hydrate-bearing sandstone
Almenningen, Stian; Gauteplass, Jarand; Hauge, Lars Petter; Barth, Tanja; Fernø, Martin; Ersland, Geir (Peer reviewed; Journal article, 2019)This paper reports measurements of relative permeability to methane (CH4) and carbon dioxide (CO2) in hydrate-bearing sandstone core samples. The CH4 (or CO2) permeability was measured at reservoir conditions for different ... -
Multiscale investigation of CO2 hydrate self-sealing potential for carbon geo-sequestration
Gauteplass, Jarand; Almenningen, Stian; Ersland, Geir; Barth, Tanja; Yang, Jinhai; Chapoy, Antonin (Peer reviewed; Journal article, 2020)Storage of liquid CO2 in shallow geological formations is a recently proposed concept that can facilitate increased storage capacity and improved mobility control. If stored below the gas hydrate stability zone (GHSZ), ... -
Storing CO2 as solid hydrate in shallow aquifers: Electrical resistivity measurements in hydrate-bearing sandstone
Gauteplass, Jarand; Almenningen, Stian; Ersland, Geir (Journal article; Peer reviewed, 2020)A recent proposed carbon dioxide (CO2) storage scheme suggests solid CO2 hydrate formation at the base of the hydrate stability zone to facilitate safe, long-term storage of anthropogenic CO2. These high-density hydrate ... -
Transport and storage of CO2 in natural gas hydrate reservoirs
Ersland, Geir; Husebø, Jarle; Graue, Arne; Kvamme, Bjørn (Peer reviewed; Journal article, 2009-02)Storage of CO2 in natural gas hydrate reservoirs may offer stable long term deposition of a greenhouse gas while benefiting from methane production, without requiring heat. By exposing hydrate to a thermodynamically preferred ... -
Transport mechanisms for CO2-CH4 exchange and safe CO2 storage in hydrate-bearing sandstone
Birkedal, Knut Arne; Hauge, Lars Petter; Graue, Arne; Ersland, Geir (Peer reviewed; Journal article, 2015-06-08)CO2 injection in hydrate-bearing sediments induces methane (CH4) production while benefitting from CO2 storage, as demonstrated in both core and field scale studies. CH4 hydrates have been formed repeatedly in partially ... -
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 ...