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Permedia® Petroleum Systems Software

Downscale with Fabrics

While most flow solvers require some form of upscaling, Permedia® Migration can use data at its native resolution, letting you focus on the geology and the fluids, not on degrading data to suit the solver.

Using "conditioning fabrics", infill coarse basin or reservoir models with fabric information derived from seismic, geostatistical models, or other data, at its original resolution.

Because the fabric does not need to correspond with the precise spatial dimensions of the overlying grid, you can condition those portions of your model for which you have data, and use detailed reservoir models in basin-scale simulations. For example, you can infill portions of a basin-scale model based on sparse 2D seismic lines with reservoir-scale information based on an inverted 3D seismic cube. This lets you use consistent data sets from reservoir to basin scales and back again.

No fabricWith fabric

Petroleum flow paths calculated using threshold pressures defined by three petrophysical units without conditioning (left) and with conditioning based on a seismic model (right). Flow paths are influenced by the subtleties of the fabric but column heights and gross threshold pressures are controlled by the bulk flow unit parameter distributions. Colors represent invasion time.

Using conditioning fabrics, coarse gridcells can be used for pressure and temperature calculations (e.g., from PetroMod or Temis packages) while an inverted seismic "fabric" or a detailed reservoir-scale model can be used for the petroleum migration calculations. If the underlying mesh is deformed through time, the fabric can be deformed along with it.

Permedia users are using geostatistical models to create high-resolution basin fabrics in addition to investigating the use of inverted seismic properties and seismic coherency models.

Downscale coarse basin models

Use basin-scale hydrocarbon generation, expulsion and migration model results to "initialize" reservoir-scale assessments. In this example a time-varying petroleum charge was introduced into the margin of a high resolution reservoir model. Within the reservoir three separate gas-dominated accumulations ultimately form. Top seal leakage is occurring from the shallowest accumulation. Red is gas, green is oil. A fabric derived from seismic data has been used.

Output of a Dynamic Migration simulation that uses a seismic fabric to downscale a classical basin model.