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Multiscale reservoir simulation

Multiscale methods simulate processes across multiple scales of time and/or space and are widely used in science and engineering. These methods have seen significant development in recent years and are applied across a diverse range of fields. SINTEF is a leader in the development of multiscale methods for simulating complex geoenergy processes such as oil and gas reservoirs.

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Multiphase flow in porous rock formations is a multiscale problem due to physical processes occurring on various temporal and spatial scales. Heterogeneous petrophysical characteristics make it challenging to account for all variations, so grid coarsening and upscaling techniques are commonly used to create computationally tractable models. Lack of scale separation means that local upscaling methods are only valid for simplified setups, and nonlocal information is required to compute effective properties that accurately represent the flow patterns.

Multiscale formulations have proven to be a highly effective alternative to upscaling that incorporates subscale effects in a manner consistent with the physical models governing unresolved scale behavior. SINTEF has been such methods since the early 2000s, with a focus on handling complex grids and realistic flow physics.

Our multiscale restriction-smoothed basis (MsRSB) method is the current state-of-the-art and forms a basis of the accelerated solution engine in SLB's next-generation reservoir simulator, INTERSECT.

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