| 郑宇轩.青海共和干热岩GR1井钻井工艺技术[J].地质与勘探,2018,54(5):1038-1045 |
| 青海共和干热岩GR1井钻井工艺技术 |
| The drilling technology for the GR1 well in hot-dry rock of Gonghe, Qinghai Province |
| 投稿时间：2018-01-18 修订日期：2018-04-17 |
| DOI：10.12134/j.dzykt.2018.05.014 |
| 中文关键词: 干热岩 破碎地层 孕镶金刚石钻头 高温聚合物防塌钻井液 GR1井 共和 青海 |
| 英文关键词: hot dry rock,broken formation,diamond-impregnated bit,high temperature polymer anti-collapse drilling fluids,GR1Well,Gonghe,Qinghai Province |
| 基金项目:国土资源部公益性行业科研专项“干热岩耐高温钻井液技术研究”（编号：201411094-2）资助 |
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| 中文摘要: |
| 本文介绍了青海共和县恰卜恰镇干热岩勘探孔GR1井的钻探施工概况以及采用的关键技术。通过对孕镶金刚石全面钻头技术、耐高温聚合物防塌钻井液技术、大直径螺杆复合钻进技术、底喷式聚晶取心钻头技术、壁钩式套铣打捞技术等难点的研究，解决了干热岩钻探碎岩效率低、钻进速度慢、钻井液高温稳定性及护壁与携岩能力差等难题，形成了一套适用于深部大口径干热岩钻探工艺技术，有效降低干热岩钻井与成井成本，对提高干热岩资源利用的经济可行性意义重大。共和盆地GR1干热岩勘探孔在地下3705.42m深处探获温度达到236℃以上的干热岩，这是我国首次在青海共和盆地钻获高温优质干热岩体，实现了我国干热岩勘查重大突破。 |
| 英文摘要: |
| This?paper presents?the?situation?of?drilling-site?construction?and?the?key?techniques?used?in?the?drilling?of?the dry-hot?rock?exploration?hole?GR1?at?Qiabuqian?town,?Gonghe?country,?Qinghai?province.?We have conducted research?on?the?difficult?problems?such?as?the?impregnated?diamond?full-scale?drilling?bit?,?high?temperature?resistant?polymer?anti-collapse?drilling?fluid?,large-diameter?screw?compound?drilling?,?bottom-jet?polycrystalline?coring?bit?and?the?wall?hook?type?milling?and?salvage.?We have also tackled problems of?low?efficiency,?slow?drilling?speed,?high?temperature?stability?of?drilling?fluid?and?poor?wall?protection?and?cuttings?carrying?capacity?of?the?dry-hot?rock?drilling.?And?a?set?of?drilling?techniques?for?deep?large-?diameter?dry?-?hot?rock?is?have been developed.?The?cost?of?dry-hot?rock?drilling?and?well?completion?has?been?reduced?effectively.?It?is?of great?significance?for?improving?the?economic?feasibility?in utilization?of?dry-hot?rock?resources.?The?hot-dry?rock’s?temperature?at?a?depth?of?3705.42?m?in?the?exploration?drilling?hole?GR1?is?above?236?℃.This?is?the?first?time?that?China?has?obtained?high?temperature?and?high?quality?dry-hot?rock?mass?at?Gonghe?Basin?of?Qinghai?Province, showing?a?major?breakthrough?in?the?exploration?of?dry-hot?rock?in?our country. |
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