摘要
通过各种应力模型和岩芯样品渗透率的研究,证实岩石渗透率和水平应力之间存在明确的对应关系。由于这种关系受岩性和岩石结构的影响,若想得到较准确的渗透率值,须注意3点:(1)针对不同的岩石,应选择合适的应力模型,以提高应力渗透率之间的相关性;(2)选择对泥质敏感的测井资料,降低泥质对应力渗透率关系的影响,扩大应用范围;(3)应用分辨率高的测井资料,提高由应力求出的渗透率的分辨率。
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.
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