石油工程岩石强度与变形尺度效应研究现状综述与展望

岩石强度与变形存在显著的尺度效应,致使实验室尺度的岩样强度与变形测试结果不能直接应用于工程范围的大尺度岩体或微纳米级尺度的岩屑(矿物)。实现岩石强度与变形的跨尺度表征,即基于常规岩心测试手段,结合跨尺度表征方法来预测其他尺度的岩石力学参数和变形规律对于油气高效、经济、安全开采具有重要意义。本文在充分调研了国内外关于岩石强度与变形尺度效应研究的基础上,介绍了当前研究岩石强度与变形尺度效应的主要理论、主要认识和影响因素,并对石油工程领域岩石强度与变形尺度效应的研究方向进行了展望。

Review and Prospect of the Research Status of Rock Strength and Deformation Scale Effect in Petroleum Engineering

The strength and deformation of petroleum reservoir rocks have significant scale effect, which makes the test results of mechanical properties of rock samples at laboratory scale not directly applicable to large-scale rock mass or basic minerals at micro-nano scale in engineering scope. It is of great significance for efficient, economical and safe exploitation of oil and gas to realize cross-scale characterization of mechanical properties of petroleum-bearing rocks, i.e. to predict rock mechanical parameters and deformation laws at other observation scales by using conventional laboratory experimental scales. Based on a thorough investigation of the scale effect of rock mechanics properties at home and abroad, this paper introduces the main methods, main knowledge and influencing factors of the scale effect of rock mechanics properties at present, and gives some suggestions on the future key research directions of the scale effect of rock mechanics properties in petroleum engineering field.