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基于压力平衡条件下“戴帽”固井注水泥技术探讨

景龙, 李兴权, 鲍石磊, 李砚智, 张成. 2023. 基于压力平衡条件下“戴帽”固井注水泥技术探讨. 钻探工程, 50(2): 80-85. doi: 10.12143/j.ztgc.2023.02.011
引用本文: 景龙, 李兴权, 鲍石磊, 李砚智, 张成. 2023. 基于压力平衡条件下“戴帽”固井注水泥技术探讨. 钻探工程, 50(2): 80-85. doi: 10.12143/j.ztgc.2023.02.011
JING Long, LI Xingquan, BAO Shilei, LI Yanzhi and ZHANG Cheng, . 2023. Discussion of cement injection technology for “cap” cementation based on balanced pressure condition. DRILLING ENGINEERING, 50(2): 80-85. doi: 10.12143/j.ztgc.2023.02.011
Citation: JING Long, LI Xingquan, BAO Shilei, LI Yanzhi and ZHANG Cheng, . 2023. Discussion of cement injection technology for “cap” cementation based on balanced pressure condition. DRILLING ENGINEERING, 50(2): 80-85. doi: 10.12143/j.ztgc.2023.02.011

基于压力平衡条件下“戴帽”固井注水泥技术探讨

  • 基金项目:

    河北省地质矿产勘查开发局项目“河北平原深部基岩热储钻探关键技术研究”(编号13000022P003294101122)

详细信息
    作者简介: 景龙,男,汉族,1978年生,钻探工程专业,主要从事钻探技术及管理工作,河北省衡水市红旗大街808号地质大厦,jing_longd@163.com。

Discussion of cement injection technology for “cap” cementation based on balanced pressure condition

  • 在地热井漏失地层进行“戴帽”固井注水泥难度大,往往因挤入的水泥浆偏离设计位置而导致固井失败。本文提出了漏失层“戴帽”固井的技术思路,即利用井内液柱压力与地层裂隙压力保持平衡以有效控制固井水泥浆柱移动位置,通过控制挤注排量以防止水泥浆被稀释。在具体实施中,可以采用开放固井和封闭固井两种方式。前者在注替浆过程中,井筒与外界大气、上下井筒之间始终相通。当上下套管级差较大时,水泥浆柱在平衡过程中下移距离较长,位置不易控制,且易稀释,但是所需工具简单,适合应用于上下套管级差较小的条件,尤其是在同级套管内。对于后者而言,需采用特殊密封工具封闭下部套管,在注替浆过程中,上下井筒始终是不通的。可以避免水泥浆柱下移距离长、位置不易控制、易稀释等缺点,适合各种套管级配条件下固井注水泥作业,在套管级差较大时更显其精确封固优势。
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出版历程
收稿日期:  2022-09-16
修回日期:  2022-11-13

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