Exxonmobil Upstream Research Company

Elena Kartasheva

Larisa V Branets

Valeriy Kubyak

Xiaohui Wu

Xiao-Hui Wu

Olga Kroshkina

Igor V Krasnogorov

Dmitry Kandybor

Valeriy Shmyrov

Method for generating a 3D grid, and for defining a material property model on the grid, to use, for example, in a reservoir simulator. A mapping is defined () to a design space in which the material property is described as a piecewise smooth implicit or explicit function in three dimensions. Grid geometry is constructed only in the physical space of the model (--), and no grid is required in the design space. The material property, for example permeability, is sampled in the design space () to populate the cells in the grid constructed in the physical domain. Prismatic grid cells may be truncated based on faults and horizons (), or maybe conformed to fault surfaces using a 3D parameterization of the model (). Only forward mapping, i.e. from the physical domain to the design space, is required.

Volumetric grid generation in a domain with heterogeneous material properties

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.

Method and apparatus for generating a three-dimensional simulation grid for a reservoir model

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Alpharetta, GA, United States of America

Elena Kartasheva