| 山西河东煤田石楼北区块NSL05井煤层气钻井施工工艺 |
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| 引用本文： | 崔龙,熊涛,张彪,曲彬.山西河东煤田石楼北区块NSL05井煤层气钻井施工工艺[J].中国煤炭地质,2013(12):72-74,82. |
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| 作者姓名： | 崔龙 熊涛 张彪 曲彬 |
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| 作者单位： | 中煤地质工程总公司北京大地特勘分司,北京100161 |
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| 摘 要： | 石楼北区块位于鄂尔多斯盆地东缘。该区域表土层松散易坍塌，在以往的钻探施工中，地层中不同程度的存在涌水或者漏失情况。太原组第三层灰岩可钻性较差，取心作业中频繁发生钻头被堵死的情况。为了解决以上问题，缩短施工工期，对钻具组合和钻井参数进行了调整，采用四翼PDC钻头、直螺杆的钻具结构；取心作业主要采用绳索取心，采用①215．9mm的取心钻头代替该区以往的016．9mm钻头，利用Φ127mm钻杆作为绳索取心工具的运行通道，并采用自行研制的内外管总成和内管取心工具．保证了取心效果；将钻头水眼更改为12mm×2＋14mm＋16ram的组合方式，有效保持了钻孔内的清洁，避免岩屑重复破碎，进一步提高钻进效率。同时介绍了钻探施工程中设备的配套、钻井液的配制、钻井技术参数的选择等。结果表明：该井取心岩心总收获率为92．15％，其中8#煤心质量总采取率为93．50％；井斜3°10′，全井水平位移44．17m，最大全角变化率耋1．1。／30m。对该区煤层气井钻探施工有很好的借鉴作用。
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| 关 键 词： | 煤层气钻井 绳索取心 钻井工艺 NSL05井 |
NSL05 CBM Well Drilling Technology in Shilou North Block,Hedong Coalfield,Shanxi |
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| Cui Long,Xiong Tao,Zhang Biao and Qu Bin.NSL05 CBM Well Drilling Technology in Shilou North Block,Hedong Coalfield,Shanxi[J].Coal Geology of China,2013(12):72-74,82. |
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| Authors: | Cui Long Xiong Tao Zhang Biao and Qu Bin |
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| Institution: | (Beijing Dadi Special Exploration Branch, China Coal Geological Engineering Corporation, Beijing 100161) |
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| Abstract: | The Shilou north block is situated at the eastern margin of Ordos Basin. The overburden in the area is loose and easy to col- lapse; varying degrees of water gushing and circulation loss have been happened in past drilling operations. The No.3 limestone in Tai- yuan Formation has poor drillability, bit bailing happened frequently during coring. To solve above issues and shorten operation period, carried out regulations for drilling assembly and drilling parameters, thus using 4-wing PDC bit, frank screw drills, wire-line coring, 215.9mm coring bit replacing q~169mm coring bit, dP127mm rod as wire-line coring channel and self manufactured inner, outer tube assembly, inner tube coring tool have ensured coring effect. Bit nozzle has been modified into 12mmx2＋ 14mm＋ 16mm array mode, thus effectively kept borehole clean, avoid cuttings repeatedly crushing, raising drilling efficiency a step further. Meanwhile, the equipment combinations, drilling fluid formulation, parameter selection during drilling operations have been introduced. The result has shown that total core recovery of the well is 92.15%, in which, total core recovery of No.8 coal is 93.50%; well deviation 3~10＇, horizontal displace- ment 44.17m, maximum dip angle rate of change ~l.l~/30m. The study is a nice reference for CBM well drilling operations in the area henceforth. |
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| Keywords: | CBM well drilling wire-line coring drilling technology NSL05 well |
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