Waterflooding for lateral anisotropy of porous media

摘要

There are different types of the inside-the-pool flooding: dividing the deposit by injectors into lines, circles, creating a central row of dividing injection wells with several rows, going across, and those that are combined with marginal flooding. The injector pattern depends on the field's geological conditions and the terms of recovery. In the course of field development, the number of wells may increase, transferring row and block-row systems into dispersed ones. In case of laterally heterogeneous deposits, it is crucial to decide on the injector-producer arrangement. The decision depends on the stress-strain analysis results, which reveal the formation's heterogeneity. The authors suggest drawing lines, which represent the direction of minimal stress, based on the well test data analysis. The idea is to locate the rows of injectors along these lines or to position disperse systems accordingly.