YR1地热井断层性漏失封堵技术
投稿时间:2021-01-05  修订日期:2021-03-12  点此下载全文
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战启帅 山东省鲁南地质工程勘察院(山东省地勘局第二地质大队) 272100
宋天培 山东省鲁南地质工程勘察院(山东省地勘局第二地质大队) 272100
中文摘要:针对YR1地热井断层性漏失量大、断层水水头高度大、上部有裸孔井段等井下复杂情况,在分析漏失性质和井眼环境的基础上,分析现有恶性漏失堵漏技术的适用条件和局限性,果断采取下套管封隔断层的施工方案,成功解决了断层性漏失堵漏难题。同时采用了分级固井技术,解决断层水上窜下渗的隐患,保证了成井质量,为今后应对断层性漏失或溶洞性漏失提供了很好的借鉴。现场实践表明,采用本文中的下套管封隔断层堵漏措施耗时短、成本低、效果好,为钻探工程漏失堵漏提供新途径。推进了地热资源开发利用“郓城模式”,服务了地方经济社会发展,对助力打赢污染防治攻坚战具有重要意义。
中文关键词:地热井  恶性漏失断段性漏失断层性漏失  堵漏  断层  井下复杂情况  “郓城模式”
 
Fault-leakage plugging technology for YR1 geothermal well
Abstract:Since the complex downhole conditions of YR1 geothermal well, such as large amount of fault leakage, high water head of fault water, and barefoot interval in the upper part, on the basis of analyzing the nature of leakage and borehole environment, we analyzed the application conditions and limitations of the existing plugging technology for malignant leakage, and decidedly adopted the construction scheme of running casing to seal the fault. At last, we successfully solved the challenge of fault leakage plugging. At the same time, the staged cementing technology was adopted to solve the potenial danger of upward channeling and downward seepage of fault water, ensure the quality of well making, and provide a good reference for dealing with fault leakage or cave leakage in the future. The field practice shows that the casing plugging measure introduced in this paper has the advantages of short time used, low cost and good effect, which provides a new way for drilling leakage plugging. It has promoted the development and utilization of geothermal resources, "Yuncheng model", which has served the local economic and social development and is of great significance to help win the battle against pollution.
keywords:Geothermal well  Serious fault lreakageFaulty leakage  Plugging  fault  Well complexity  
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