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• W2066565594 abstract "Abstract In this paper, we present a new computational framework to simulate reservoirs containing complicated geological and engineering features (for example, faults, induced or natural fractures, and perforations). Unlike traditional computational methods, the new approach does not require the mesh to honor the geometrical shapes of subsurface features. The effects of these features on the solution are captured by enriching the finite element approximation based on the Partition of Unity theory. This new simulation capability eliminates the laborious meshing work traditionally required for modeling complicated subsurface features without compromising solution accuracy. It is especially useful in the detailed analysis of near-well physics where subsurface features at this scale need to be modeled both accurately and efficiently. In cases where the subsurface features are evolving, the computational mesh does not have to know a priori the shape of the evolving subsurface features. This method is particularly useful in the study of curvature changes of hydraulic fractures due to evolving stress fields away from the well. A number of examples are given to demonstrate the effectiveness of the proposed approach. The examples are grouped into three broader application areas:well performance analysis of fractured completions,deformation characteristics of reservoirs containing fracture networks, andsimulation of fracture interference and re-orientation. Introduction Hydrocarbon reservoirs contain various forms of geological or engineered subsurface features, such as faults, inter-laminar layers, natural or induced fractures, perforations, etc. These features may affect reservoir behavior during hydrocarbon extraction and fluid injection. To capture the effects of subsurface features, a computational mesh usually has to hono9r the geometrical shapes of the subsurface features. However, these shapes are often complicated and may even evolve during subsurface operations, and as a result, make the related simulation study extremely difficult, if not impossible. For example, in hydraulic fracture simulation, traditional approaches first make certain assumptions on the trajectory of a propagating fracture, and then construct a mesh honoring the assumed shape of the fracture. Most of these approaches assume a planar geometry. Such assumptions prevent the investigation of fracture re-orientation or interference where fracture trajectory cannot be specified a priori. Detailed near-well flow simulation using the traditional finite element method (FEM) requires a mesh to be constructed that honors the fracture geometries. Such a procedure is very expensive because of the expertise and time needed, hence limiting the number of stimulation options that can be explored." @default.
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• W2066565594 date "2009-10-19" @default.
• W2066565594 modified "2023-10-16" @default.
• W2066565594 title "A New Enriched Finite Element Method to Simulate Hydrocarbon Reservoirs Containing Subsurface Features" @default.
• W2066565594 doi "https://doi.org/10.2118/125634-ms" @default.
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