SAND
SAND
Statistical Analysis of Natural Resource Data - SAND
The SAND department was established in 1984. It is a significant international contributor to research and services within reservoir description, stochastic modeling and geostatistics for the oil industry. Our primary goal is to use statistical methods to reduce and quantify risk and uncertainty. The main area is stochastic modeling of the geology in petroleum reservoirs including upscaling and history matching. There is also a significant activity on all kinds of risk quantification, primarily within the energy sector.
The staff has a background in statistics, mathematics, physics, numerical analysis and computer science. To ensure that we work with interesting and relevant problems for the petroleum industry, we encourage close cooperation with professionals within the geo-science whenever this is relevant for the project. Oil companies, software vendors within the oil industry and research project sponsored by the European Commission and The Research Council of Norway, finance most projects.
Research areas
Efficient depletion of oil and gas reservoirs require an accurate description of geometric shapes and the petrophysical properties of the sedimentary rocks. We use statistical methods to integrate all available data and stochastic models to describe the remaining uncertainty.
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NR has long experience in stochastic modeling faults and surfaces. This is done to integrate seismic and well data with geological knowledge, and to study the uncertainty both in reservoir volume and in flow within the reservoir.
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We use Bayesian approach for inversion of geophysical data. This provides a common framework when integrating rock physics and structural geology with geophysical data. We do work on seismic and electromagnetic data.
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The oil and gas industry has lot of data from different sources. These data can give valuable information to decision-makers about uncertainty. Statistical methods are valuable tools to estimate uncertainty and thereby give important decision support.
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The use of statistical methods for using historical production data to improve petroleum reservoir models.
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Last 5 scientific articles
Ovanger, Oscar; Lee, Daesoo; Eidsvik, Jo; Hauge, Ragnar; Skauvold, Jacob; Aune, Erlend. A Statistical Study of Latent Diffusion Models for Geological Facies Modeling. Mathematical Geosciences (ISSN 1874-8961). doi: 10.1007/s11004-025-10178-5. 2025.
Lee, Daesoo; Ovanger, Oscar; Eidsvik, Jo; Aune, Erlend; Skauvold, Jacob; Hauge, Ragnar. Latent diffusion model for conditional reservoir facies generation. Computers & Geosciences (ISSN 0098-3004). 194 doi: 10.1016/j.cageo.2024.105750. 2025.
Arguello Scotti, Agustin; Eide, Christian Haug; Aarnes, Ingrid; Hauge, Ragnar; Skauvold, Jacob; Howell, John Anthony. Modelling intra-parasequence reservoir heterogeneity with a process-mimicking algorithm: a case study from the Kenilworth Member, Blackhawk Formation. EarthArXiv preprint platform doi: 10.31223/X58981. 2024.
Sektnan, Audun; Almendral Vazquez, Ariel; Hauge, Ragnar; Aarnes, Ingrid; Skauvold, Jacob; Vevle, Markus Lund. A Tree Representation of Pluri-Gaussian Truncation Rules. Mathematical Geosciences (ISSN 1874-8961). 57 doi: 10.1007/s11004-024-10162-5. 2024.
Kjønsberg, Heidi; Hauge, Ragnar; Nilsen, Carl-Inge Colombo; Ndingwan, Abel Onana; Kolbjørnsen, Odd. Bayesian seismic 4D inversion for lithology and fluid prediction. Geophysics (ISSN 0016-8033). 89(6) pp R551. doi: 10.1190/GEO2024-0092.1. 2024.
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