A5006456133- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Seismic Imaging and Inversion Techniques
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Seismic Waves and Analysis
- Geological formations and processes
- Geological Modeling and Analysis
- CO2 Sequestration and Geologic Interactions
- Cryospheric studies and observations
- Marine Biology and Ecology Research
- Arctic and Antarctic ice dynamics
- Carbon Dioxide Capture Technologies
- Big Data and Business Intelligence
- Economic and Technological Systems Analysis
- Reservoir Engineering and Simulation Methods
- Isotope Analysis in Ecology
- Digital Transformation in Industry
- Hydraulic Fracturing and Reservoir Analysis
Vestlandsforsking
2024
UiT The Arctic University of Norway
2018-2022
Centre for Arctic Gas Hydrate, Environment and Climate
2018-2022
Abstract. Cold-seep megafaunal communities around gas hydrate mounds (pingos) in the western Barents Sea (76∘ N, 16∘ E, ∼400 m depth) were investigated with high-resolution, geographically referenced images acquired an ROV and towed camera. Four pingos associated seabed methane release hosted diverse biological of mainly nonseep (background) species including commercially important fish crustaceans, as well a new to this area (the snow crab Chionoecetes opilio). We attribute presence most...
Abstract In 2014, the discovery of seafloor mounds leaking methane gas into water column in northwestern Barents Sea became first to document existence nonpermafrost‐related hydrate pingos (GHPs) on Eurasian Arctic shelf. The discovered site is given attention because hydrates occur close upper limit stability, thus may be vulnerable climatic forcing. addition, this lies regional Hornsund Fault Zone marking a transition between oceanic and continental crust. known coincide with an extensive...
Abstract Methane fluxes into the oceans are largely dependent on methane phase as it migrates upward through sediments. Here we document decoupled transport by gaseous and aqueous phases in Storfjordrenna (offshore Svalbard) propose a three‐stage evolution model for active seepage region where gas hydrates present shallow subsurface. In preactive stage, solute diffusion is primary mechanism dissolved phase. Fluids containing have high 87 Sr/ 86 Sr ratios due to silicate weathering microbial...
Abstract Active methane seepage occurs congruent with a high density of up to 1 km-wide and 35 m deep seafloor craters (>100 within 700 km 2 area) lithified sedimentary rocks in the northern Barents Sea. The crater origin has been hypothesized be related rapid gas hydrate dissociation release around 15–12 ka BP, but geological setting that enabled possibly controlled formation not yet addressed. To investigate beneath detail, we acquired high-resolution 3D seismic data. data reveals occur...
Evaluation of seismic reflection data has identified the presence fluid escape structures cross-cutting overburden stratigraphy within sedimentary basins globally. Seismically-imaged chimneys/pipes are considered to be possible pathways for flow, which may hydraulically connect deeper strata seabed. The properties migration through must constrained enable secure, long-term subsurface carbon dioxide (CO2) storage. We have investigated a site natural active in North Sea, Scanner pockmark...
High-resolution 4D (HR4D) seismic data have the potential for improving current state-of-the-art in detecting shallow ([Formula: see text] below seafloor) subsurface changes on a very fine scale (approximately 3–6 m). Time-lapse investigations commonly use conventional broadband data, considered low to moderate resolution our context. We developed first comprehensive time -lapse analysis of high-resolution by assessing repeatability P-cable 3D 30–350 Hz) with short offsets and high density...
The Svyatogor Ridge and surroundings, located on the sediment-covered western flank of Northern Knipovich Ridge, host extensive gas hydrate related fluid flow systems. system here manifests in upper sedimentary sequence as hydrates free gas, indicated by bottom simulating reflections (BSRs) amplitude anomalies. Using 2D seismic lines bathymetric data, we map tectonic features such faults, crustal highs, indicators processes. Results indicate a strong correlation between highs accumulations...
Abstract. Cold seep communities around gas hydrate mounds (pingos) in the Western Barents Sea (76°N, 16°E, ~400 m depth) were investigated with high resolution, geographically referenced images acquired an ROV and towed camera. Four pingos associated seabed methane release hosted diverse biological of mainly non-seep (background) species including commercially important fish crustaceans, as well a new to this area (the snow crab Chionoecetes opilio). We attribute presence most benthic...
Summary We present the results of a novel method for high-resolution 3D site characterization. The strategy is based on using seismic data as framework integrating geochemical, geophysical and geotechnical data. end-results are volumes with various attributes relevant improved characterization ultimately geohazard assessment (i.e. identification shallow gas, boulders, faults fractures, leakage, spatial variability, soil strength …). further show that geochemical integrated current can be...
While carbon capture and storage (CCS) has been recognized as a major enabler to reduce the amount of CO2 released into atmosphere, industry is still in its infancy. Both new technology cost-effective approaches will be necessary if CCS live up potential global warming decades come. Energy data companies such TGS can, with help from partners, work on concepts technologies that key for market, current products made oil gas market can potentially repurposed use CCS. Technologies are also being...
Summary Injection of CO2 in subsurface reservoirs may cause overburden deformation and leakage. The aim this study is to apply technologies for detection monitoring leakage above the injection reservoirs. examples include data from Vestnesa Ridge natural seep site, Snøhvit gas field storage site region, Gemini North reservoir. Reprocessing existing 3D high-resolution seismic allows resolving features with a vertical lateral resolution down c. 1 m 5 respectively. current acquisition systems...
Summary High-resolution 3D site characterization can deliver reliable quantitative property volumes of the subsurface when based on seismic data able to image meter-sized objects. Following theoretical analysis wave propagation in shallow sub-surface, we present case studies re-processing P-Cable data. The study from Vestnesa Ridge west Svalbard and outer Vøring Basin show that 2.5D provide decimeter- meter-scale vertical resolution subsurface. Collection new with optimized acquisition...
This expedition ran between July 28 and August 3 2020, targeting three sites in the Barents Sea, an area of glacial landforms Ingøydjupet trough, Håkon Mosby Mud Volcano Sorvestnaget Sand Wave area. Our short but productive gave post-doctoral researchers opportunity to follow a research hypothesis from conception through planning data collection aboard vessel, as well plan lead expedition. At study areas, our objectives were collect cores for geochemical analyses bathymetry geophysical while...
RV Helmer Hanssen is the only vessel operating so far north (81 N) in October. One of research questions addressed during this cruise is: Where do gas hydrate exist seabed and how much methane does it actually release? The CAGE 15-6 explored potential charged sub-seabed environments release zones at Storfjordrenna, Vestnesa Svyatogor Ridge, Yermak Plateau, Sofia Basin west Prins Karls Foreland. Our route was traceable by www.sailwx.com. weather forecasts from www.windyty.comwere used to...
For the first time, we test repeatability of high-resolution P-Cable seismic data at three sites with different geological and environmental settings to evaluate its potential as a time-lapse tool. Results are positive indicate ideal setting for using tool is typical marine sedimentary deposition where can be processed obtain quantitative measures similar conventional 3D (NRMS < 0.4; Predictability > 0.9). Repeatability slightly worse in areas harder or more chaotic sediments...