空气潜孔锤钻进技术在舜皇山基岩地热深井的应用
投稿时间:2020-09-20  修订日期:2021-04-12  点此下载全文
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作者单位邮编
石荆京 中国地质大学(北京)北京 100083 100083
张海林 北京泰利新能源科技发展有限公司北京 101118 101118
苏园园 北京泰利新能源科技发展有限公司北京 101118 101118
胡志航 中国地质大学(北京)北京 100083 100083
郑秀华 中国地质大学(北京)北京 100083 100083
基金项目:国家自然科学基金项目“高温热储环境下微气泡钻井液特性及作用机理”(编号:41872184)
中文摘要:空气潜孔锤钻进技术不仅可以提高钻探效率,而且不损害地热储层,因此在地热井中的应用十分广泛,但是仍受到钻探深度和出水量的限制。在湖南永州舜皇山基岩地热深井钻探过程中,常规牙轮钻进与泥浆钻进工艺存在钻进效率低,堵塞储层、影响出水量的可能。应用空气潜孔锤钻进技术实现了钻探深度的突破,钻探深度达到1820 m,实际出水量400 m3/d,出水温度43 ℃,符合设计指标。本文总结了相应的钻进工艺措施,以期促进对该技术在地热深井中的推广应用。
中文关键词:空气潜孔锤  基岩  地热深井  钻探效率  地层出水量  热储保护
 
Application of air DTH hammer drilling technology in deep bedrock geothermal well in the Shunhuang Mountain
Abstract:Air DTH hammer drilling technology can not only improve drilling efficiency, but also does not damage geothermal reservoirs; therefore, it is widely used in geothermal well drilling. However, it is limited by drilling depth and water output. During drilling of deep geothermal wells in the Shunhuang Mountain of Yongzhou, Hunan, air down-the-hole hammer drilling technology was used to achieve a breakthrough in the drilling depth with the drilling depth up to 1820m, and the actual water output of 400m3/day at surface temperature of 43℃, meeting the design index. The relevant drilling measures are summarized so as to promote application of the technology in geothermal deep wells.
keywords:air DTH hammer  bedrock  deep geothermal well  drilling efficiency  formation water output  thermal storage protection
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