周彤,张士诚,杨柳,李四海,徐正辉

• 1:中国石油大学(北京)石油工程学院
• 2:中国石油大学(北京)非常规油气协同中心

摘要(Abstract)：

针对中国典型的页岩储层开展自发渗吸对比实验,并结合页岩表面硬度测试,分析了页岩自发渗吸能力与裂缝表面软化程度的关系,研究不同水化阶段页岩裂缝表面力学性质变化规律。实验结果表明:吸水最初的1 d是裂缝表面发生硬度伤害的主要阶段,占总伤害的50%~75%,随后硬度伤害持续、缓慢增加;渗吸速率和单位体积岩石吸水量与页岩裂缝表面软化程度并没有直接关系,但吸水孔隙体积倍数、有效驱动力系数与页岩裂缝面软化程度有明显的正相关性,其值越高水岩作用越剧烈。

关键词(KeyWords)： 裂缝;自发渗吸;页岩;表面硬度;伤害

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划“973”项目(编号:2013CB228004);; 高等学校博士学科点专项科研基金课题“页岩气藏大规模非对称体积改造基础理论研究”(编号:20120007110004)

作者(Author): 周彤,张士诚,杨柳,李四海,徐正辉

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