Browsing Bergen Open Research Archive by Author "Ersland, Geir"
Now showing items 1-20 of 25
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Compressional wave phase velocity measurements during hydrate growth in partially and fully water saturated sandstone
Sæther, Mathias Myrtveit; Almenningen, Stian; Ersland, Geir; Lunde, Per (Journal article; Peer reviewed, 2022)The compressional wave phase velocity (cP) has been measured as a function of hydrate saturation (SH) during hydrate growth in Bentheim sandstone. The Fourier spectrum signal processing technique was used to specifically ... -
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 ... -
Developing Online Teaching and Learning – Design, Execution, and Evaluation of a Module Based Course in Carbon Capture, Storage and Utilization
Ersland, Geir (UPED-skrift;, Working paper, 2022) -
Direct Visualization of CH4/CO2 Hydrate Phase Transitions in Sandstone Pores
Pandey, Jyoti Shanker; Strand, Ørjan; Von Solms, Nicolas; Ersland, Geir; Almenningen, Stian (Journal article; Peer reviewed, 2021)This paper reports the formation and dissociation pattern of hydrate crystals with varying compositions of CH4 and CO2 in porous media. Direct visualization was carried out using a high-pressure, water-wet, silicon wafer-based ... -
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 ... -
Effect of relative permeability hysteresis on reservoir simulation of underground hydrogen storage in an offshore aquifer
Lysyy, Maksim; Fernø, Martin; Ersland, Geir (Journal article; Peer reviewed, 2023)Underground hydrogen storage (UHS) in porous media is proposed to balance seasonal fluctuations between demand and supply in an emerging hydrogen economy. Despite increasing focus on the topic worldwide, the understanding ... -
Effects of methane hydrates on two-phase relative permeability in sandstone: Numerical simulation of laboratory experiments
Bello Palacios, German Alejandro; Fotland, Per; Almenningen, Stian; Ersland, Geir (Journal article; Peer reviewed, 2022)To identify the challenges and limitations in measuring and modelling gas relative permeability in hydrate bearing sandstone, we simulate a series of experiments. Experimental and numerical results are used to examine the ... -
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 ... -
Experimental and Numerical Analysis of the Effects of Clay Content on CH4 Hydrate Formation in Sand
Bello Palacios, German Alejandro; Almenningen, Stian; Fotland, Per; Ersland, Geir (Journal article; Peer reviewed, 2021)Natural gas hydrates exist in large quantities in nature and represent a potential source of energy, mostly in the form of methane gas. Knowledge about hydrate formation in clayey sand is of importance for understanding ... -
Experimental Investigation of Critical Parameters Controlling CH4− CO2 Exchange in Sedimentary CH4 Hydrates
Almenningen, Stian; Graue, Arne; Ersland, Geir (Journal article; Peer reviewed, 2021)Sequestration of CO2 in natural gas hydrate reservoirs may offer stable long-term deposition of a greenhouse gas while benefiting from CH4 gas production. In this paper, we review old and present new experimental studies ... -
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 ... -
Hydrogen Relative Permeability Hysteresis in Underground Storage
Lysyy, Maksim; Fernø, Martin; Ersland, Geir (Journal article; Peer reviewed, 2022)Implementation of the hydrogen economy for emission reduction will require storage facilities, and underground hydrogen storage (UHS) in porous media offers a readily available large-scale option. Lack of studies on ... -
Impact of gas type on microfluidic drainage experiments and pore network modeling relevant for underground hydrogen storage
Lysyy, Maksim; Liu, Na; Landa-Marbán, David; Ersland, Geir; Fernø, Martin (Journal article; Peer reviewed, 2024)Underground hydrogen storage (UHS) in geological reservoirs is proposed as a technically feasible solution to balance mismatch between supply and demand in emerging markets. However, unique hydrogen properties and coupled ... -
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 ... -
Microfluidic hydrogen storage capacity and residual trapping during cyclic injections: Implications for underground storage
Lysyy, Maksim; Liu, Na; Solstad, Celine Marie; Fernø, Martin; Ersland, Geir (Journal article; Peer reviewed, 2023)Long-term and large-scale H2 storage is vital for a sustainable H2 economy. Research in underground H2 storage (UHS) in porous media is emerging, but the understanding of H2 reconnection and recovery mechanisms under cyclic ... -
Modeling the Effects of Sedimentation on Natural Occurrences of CH4 Hydrates in Marine Sediments
Bello Palacios, German Alejandro; Fotland, Per; Ersland, Geir (Journal article; Peer reviewed, 2022)This study explores the relationships that sedimentation rate and transport properties have with the formation and evolution of hydrates in fine-grained marine sediments and their corresponding bottom simulating reflector ... -
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), ... -
Pore-scale dynamics for underground porous media hydrogen storage
Lysyy, Maksim; Ersland, Geir; Fernø, Martin (Journal article; Peer reviewed, 2022)Underground hydrogen storage (UHS) has been launched as a catalyst to the low-carbon energy transitions. The limited understanding of the subsurface processes is a major obstacle for rapid and widespread UHS implementation. ...