DISCRETE IRREGULAR CELLULAR MODELS FOR SIMULATING THE DEVELOPMENT OF FRACTURED RESERVOIRS

摘要

An electronically stored model for a reservoir can include a plurality of hierarchical levels and a plurality of cells representing corresponding portions of the reservoir. The model can include a dimension and a cell number corresponding to the reservoir. A dimension of a cell of an nth hierarchical level can be defined in terms of a dimension of a cell of a first hierarchical level and an array of vertex coordinates along one or more axes can be generated. The model can include a ratio of dimensions among hierarchical levels for improved reservoir modeling. The model can include a ratio of permeability among hierarchical levels for improved reservoir modeling.

主权项

1. A computer-implemented method of modeling a reservoir, comprising:
creating, in computer readable storage, an electronically stored model comprising a plurality of hierarchical levels, wherein each of the plurality of hierarchical levels comprises a plurality of cells representing corresponding portions of the reservoir; wherein creating the electronically stored model comprises inputting an overall dimension of the reservoir along a first axis; inputting a number of cells along the first axis; defining a dimension of a cell of a first hierarchical level along the first axis asx1=Xs1+∑i=2nτi-1,wheren=Xc-12,if an odd number of cells along the first axis, orx1=Xs2+∑i=2nτi-1,wheren=Xc2-1,if an even number or cells along the first axis;
defining a dimension of a cell of an nth hierarchical level along the first axis as xn=τn−1·x1; calculating a dimension of a cell along the first axis for each of the plurality of hierarchical levels; and generating a first array of vertex coordinates along the first axis, the first array of vertex coordinates including a zero coordinate and a last coordinate on the first axis.