Abstract:

It has been proved by the study of stress models and core sample permeability that the permeability of rocks is closely related to horizental stress.The corresponding relation between rock permeability and horizental stress is usually influenced by lithology and rock texture.Following points must be taken account of:(1)choose proper stress model for particular rock in order to improve the correspondency;(2)choose log information which is sensitive to argillaceous rock so as to reduce the influence of the rock on the correspondence;(3)use high-resolution log information to improve the resolution of the permeability derived from the stress.