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干热岩储层高温条件下岩石力学特性研究

谭现锋, 张强, 战启帅, 李生海, 江海洋, 张帆. 2023. 干热岩储层高温条件下岩石力学特性研究. 钻探工程, 50(4): 110-117. doi: 10.12143/j.ztgc.2023.04.015
引用本文: 谭现锋, 张强, 战启帅, 李生海, 江海洋, 张帆. 2023. 干热岩储层高温条件下岩石力学特性研究. 钻探工程, 50(4): 110-117. doi: 10.12143/j.ztgc.2023.04.015
TAN Xianfeng, ZHANG Qiang, ZHAN Qishuai, LI Shenghai, JIANG Haiyang and ZHANG Fan, . 2023. Study on rock mechanical properties of hot-dry rock reservoir under high temperature. DRILLING ENGINEERING, 50(4): 110-117. doi: 10.12143/j.ztgc.2023.04.015
Citation: TAN Xianfeng, ZHANG Qiang, ZHAN Qishuai, LI Shenghai, JIANG Haiyang and ZHANG Fan, . 2023. Study on rock mechanical properties of hot-dry rock reservoir under high temperature. DRILLING ENGINEERING, 50(4): 110-117. doi: 10.12143/j.ztgc.2023.04.015

干热岩储层高温条件下岩石力学特性研究

  • 基金项目:

    国家自然科学基金项目“干热岩水力压裂-热冲击耦合机理及压裂效果评估”(编号:51979100)

详细信息
    作者简介: 谭现锋,男,汉族,1977年生,研究员,地质工程专业,博士,主要从事深部地热资源勘探与开发、采煤沉陷区综合治理与生态修复工作,山东省济宁市兖州区九州中路107号,geotan1977@126.com。

Study on rock mechanical properties of hot-dry rock reservoir under high temperature

  • 为了更准确掌握高温条件下干热岩储层的岩石力学性质,进一步指导干热岩钻井施工,通过室内试验进行了实时高温条件下的巴西劈裂试验、剪切试验、单轴压缩试验。单一试验采用同一钻孔同一深度采取的岩样,通过高低温箱控制器设置温度和恒温时间,以恒位移速率0.1 mm/min对试样进行加载,减少岩石宏观力学性质的离散性和试验过程偏差对试验结果的不利影响。试验样品为山东省文登—荣成—威海地区LGZK1井采取的二长花岗岩,通过获得试样破坏时的最大荷载值和变形数据,计算其抗拉强度、抗剪强度、抗压强度、弹性模量等力学性质参数,分析实时高温条件下岩石内部破坏机理和岩石强度差异。研究结果表明,在200 ℃以内,花岗岩的抗剪强度和单轴抗压强度升高、抗拉强度降低;随着温度的进一步升高,花岗岩的抗剪强度和单轴抗压强度降低,而抗拉强度持续降低;储层岩体温度和应力的升高,将使岩石的硬度增加、塑性增强。这些认识可为高热流花岗岩岩石力学性质的进一步研究提供基本参数,为高热流花岗岩型干热岩资源勘探开发过程中碎岩机具的选型、钻井工艺的选择、井壁稳定的控制等提供参考依据。
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出版历程
收稿日期:  2022-10-17
修回日期:  2023-04-03

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