Method and apparatus for reservoir modeling and simulation

Abstract

A method and apparatus for generating a simulation grid for a reservoir model based on a geological model comprising horizons, constraints and multiple geological grid cells. A pre-image is generated corresponding to the geological grid cells, the pre-image comprising a surface and the modeling constraints being mapped onto the surface. A constrained two- dimensional grid is generated on the pre-image, the two-dimensional grid comprising multiple grid cells. Simulation layer boundaries are selected from the geological model and the constrained two-dimensional grid is projected onto the simulation layer boundaries. Prismatic cells are then generated to form the three-dimensional simulation grid. The method of generating a grid as herein described may be incorporated in existing reservoir simulators to improve their accuracy.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application 61 / 260,589, entitled Method and Apparatus for Reservoir Modeling and Simulation, filed November 12, 2009, the entirety of which is at This is incorporated by reference. technical field [0003] Aspects disclosed herein relate to methods and apparatus for reservoir modeling and / or reservoir simulation, particularly but not exclusively to methods and apparatus for generating grids for reservoir models. Background technique [0004] This section is intended to introduce various aspects of the art, which may be related to implementations of the disclosed technology. It is believed that this discussion helps to provide a framework for facilitating a better understanding of specific aspects of the disclosed technology. Accordingly, this section should be read in this light, and not necessarily as an admission of prior art. [0005] Over the past fe...

AI Technical Summary

Problems solved by technology

This meshing method cannot handle faults or complex systems with fault heights that deviate (from the perpendicular direction) as this results in unacceptable meshes with inside-out elements and vertices outside the model domain

Also, structured grids typically require a lot of computational power to solve the reservoir model, and, therefore, these grids are not suitable for the simulation of large reservoirs that include multiple structured faults

Images