Shale-Drape Modeling for the Geologically Consistent Simulation of Clastic Reservoirs
- Faruk O. Alpak (Shell International Exploration and Production Inc.) | Frans F. van der Vlugt (Shell International Exploration and Production Inc.)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- October 2014
- Document Type
- Journal Paper
- 832 - 844
- 2014.Society of Petroleum Engineers
- 4.3.4 Scale, 5.5 Reservoir Simulation, 5.1.5 Geologic Modeling
- deepwater, shale drape, reservoir simulation, turbidite, waterflooding
- 4 in the last 30 days
- 327 since 2007
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A set of algorithms, called the shale-drape function (SDF), has been developed that incorporates bounding shales (shale drapes) for channels, channel belts (also known as meander belts), lobes and lobe complexes in 3D geologic models used for reservoir simulation. Shale drapes can have a significant impact on the recov-ery efficiency of clastic reservoirs. Therefore, they need to be modeled when present in significant quantities (in general, more than 50 to 70% in terms of coverage). The function incorporates shale drapes into a geologic model with an iterative process that creates shale layers over the entire surface of reservoir objects and then places ellipsoid-shaped holes into shale surfaces until a desired aerial coverage is reached. The workflow for application recommends to grid the simulation model along the boundaries of stratigraphic objects, thereby ensuring that the shales can be realistically represented in the fine-scale geomodel and preserved in the post-upscaling simulation model.
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