贵州省复杂地层地热深井钻探工艺
投稿时间:2017-04-15  修订日期:2018-03-15  点此下载全文
引用本文:宋继伟.贵州省复杂地层地热深井钻探工艺[J].地质与勘探,2018,54(5):1024-1037
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宋继伟 贵州省地质矿产勘查开发局115地质大队贵州贵阳 中国地质大学(武汉)工程学院湖北武汉 贵州省地质矿产勘查开发局贵州贵阳 贵州省地质矿产勘查开发局111地质大队贵州贵阳 贵州省地质矿产勘查开发局114地质大队贵州遵义 343219784@qq.com 
基金项目:贵州省社会发展科技攻关资助项目“贵州复杂地层深井钻探工艺应用研究”(编号:黔科合SY字[2015]3002)和贵州省地矿局地质科研资金资助项目“地热钻井泥浆技术的研究应用”(编号:黔地矿科合[2014]01)联合资助
中文摘要:贵州省地矿局组织实施了“贵州省地热深井钻探技术攻关”项目,研究了喀斯特地区复杂地层情况下地热深井钻探中螺杆钻井工艺和空气钻井工艺的适应性,攻克了两种工艺在该地区应用受地层特性限制的相关技术难题。螺杆马达平均寿命达到200小时以上,螺杆钻井工艺较常规钻井工艺钻进机械钻速提高2~3倍;空气潜孔锤单井应用深度超过1500m,空气潜孔锤钻井工艺较常规钻井工艺机械钻速提高10~29.5倍。同时研究了单井多工艺转换接力钻进技术,以及与上述工艺配套使用的钻井液体系。最终形成了一套适合贵州省地质条件地热深井钻探施工并能显著提高钻井效率和经济效益的组合工艺技术体系。该成果能将1口2000m以上地热深井施工周期由原来的8~12个月缩短至4~6个月,将单井平均施工成本由450万元降低至410万元以下。
中文关键词:喀斯特 地热钻井 螺杆钻进 空气钻进 钻井液 贵州
 
Drilling technology of deep geothermal wells for complex strata in Guizhou Province
Abstract:Bureau of Geology and Mineral Exploration and Development of Guizhou Province has organized and implemented the project " Technology Breakthrough of Drilling Deep Geothermal Wells in Guizhou Province", which studied the adaptability of screw drilling and air drilling technologies of geothermal in complex strata of karst areas, overcoming the related technical problems about application of these two technologies limited by stratigraphic characteristics in this region. The expectancy life of the screw motor reach more than 200 hours, and the drilling mechanical rate of screw drilling technology increases 2~3 times compared with the conventional drilling technology. Single well application depth of the air DTH hammer exceeds 1500 meters, and the drilling mechanical rate of the air DTH hammer technology increases to 10~29.5 times that of the conventional drilling technology. At the same time, this project has studied the transformation relay drilling technology of single wells and the drilling fluid system matched to above drilling technologies. Eventually this work has formed a combined technology system of drilling deep geothermal deep wells that is suitable for geological conditions of Guizhou Province. It can markedly improve drilling efficiency and economic benefit. The results would reduce the construction period of a geothermal well more than 2000 meters from 8~12 months to 4~6 months, lowering the average construction cost of single wells from 4.5 million yuan to less than 4.1 million yuan.
keywords:karst, geothermal well, screw drilling, air drilling, drilling fluid, Guizhou Province
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