储层岩石的应力敏感问题——答罗瑞兰女士

Discussion on the stress sensitivity of reservoir rocks——Reply to Ms Luo Ruilan

摘要: 储层岩石的应力敏感程度与岩石的压缩系数存在密切的关系。压缩性强的岩石,应力敏感程度就强。岩石的压缩性又与孔隙度存在密切的关系,孔隙度高,岩石就易于压缩。但是,实验过程却因为微间隙的原因,测量到了逻辑反转的结果,孔隙度低,压缩性就强,应力敏感程度就高。本文通过理论分析,彻底扭转了实验过程中出现的这一逻辑反转现象。

Abstract: The stress sensitivity of reservoir rocks is related to their compressibility.Highly compressible rocks suffer stronger stress sensitivity.The compressibility of rocks is related to their porosity.Rocks of higher porosity have higher compressibility.However,due to the micro interstice between cores and sleeves,laboratory measurements show reverse logic.High compressibilities are measured on rocks of low porosity.And low permeable rocks are highly stress-sensitive.A theoretical analysis in this paper reversed the relationship obtained in laboratory.