| 湖南保靖区块海相页岩气快速钻探技术 |
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| 引用本文： | 董振国,张跃恒,张磊.湖南保靖区块海相页岩气快速钻探技术[J].探矿工程,2019,46(10):45-52. |
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| 作者姓名： | 董振国 张跃恒 张磊 |
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| 作者单位： | 神华地质勘查有限责任公司,神华地质勘查有限责任公司,神华地质勘查有限责任公司 |
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| 基金项目： | “十三五”国家科技重大专项项目“页岩气勘查评价技术试验与应用推广”（2016ZX05034004-004） |
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| 摘 要： | 湖南保靖页岩气勘查区块黑色页岩沉积发育，是页岩气勘探开发的有利区带。由于储层埋藏深、地层高陡、地层倾角变化大、岩石可钻性差，导致钻井周期长、成本高等问题。钻前对已有的地震、测井、岩心实验等资料的处理和分析，通过优化井身结构、钻头选型、钻具组合优选和中长筒取心等，实现了保靖区块海相页岩气快速钻探。
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| 关 键 词： | 海相页岩气 钻探技术 快速钻进 保靖区块 |
| 收稿时间： | 2018/12/6 0:00:00 |
| 修稿时间： | 2018/12/6 0:00:00 |
Fast drilling technology for marine shale gas in Baojing Block, Hunan |
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| DONG Zhenguo,ZHANG Yueheng and ZHANG Lei.Fast drilling technology for marine shale gas in Baojing Block, Hunan[J].Exploration Engineering(Drilling & Tunneling),2019,46(10):45-52. |
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| Authors: | DONG Zhenguo ZHANG Yueheng and ZHANG Lei |
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| Institution: | Shenhua Geological Exploration Co., Ltd.,Shenhua Geological Exploration Co., Ltd.,Shenhua Geological Exploration Co., Ltd. |
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| Abstract: | The main part of the Hunan Baojing shale gas exploration block is located in Baojing County of Western Hunan. It is a favorable zone for exploration and development of shale gas, but high risk and challenge are present due to complicated geological conditions, deep buried reservoir, large formation dip change, poor drillability, long drilling period and high drilling cost. Before drilling started, the formation pressure and rock compressive strength was obtained by processing and analyzing the existing data of seismic, logging and core experiments. The well structure and drill bit selection were optimized. In the drilling operation, the drilling tool assembly, mud system and cementing technology were optimized according to the characteristics of the formation. The high efficiency bit was adopted with the MWD tool and long-run core barrel to carry out compound drilling, well deviation prevention, and fast drilling. In order to improve the drilling speed and efficiency in shale gas, and reduce the drilling cost, a new 70 MPa liner hanger and liner cementing technology were adopted to ensure the overall sealing, and cementing quality of the casing string, which provided guarantee for the following fracturing treatment. |
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| Keywords: | marine shale gas drilling technology fast drilling Baojing Block |
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