| 狮子洋主航道水平勘察孔测井评价方法研究与应用 |
| 投稿时间：2022-08-29 修订日期：2022-10-27 点此下载全文 |
| 引用本文：李军,李勇,谢小国,等.狮子洋主航道水平勘察孔测井评价方法研究与应用[J].钻探工程,2022,49(6):21-29.LI Jun,LI Yong,XIE Xiaoguo,et al. Research and application of the logging evaluation method for horizontal holes in the main channel of Shiziyang[J]. Drilling Engineering, 2022,49(6):21-29. |
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| 基金项目:珠江三角洲水资源配置工程（编号：发改农经［2018］1105号）“狮子洋主航道定向钻探勘察与科学研究试验” |
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| 中文摘要:为解决狮子洋主航道洋底深埋长隧洞精准勘探难题，在狮子洋主航道特大水垂比大位移科学钻孔（SZYSD-1S）中，采用存储式测井系统，通过获取自然伽马、电阻率、井深、井温、井斜等参数，利用测井数据交汇精准划分地层岩（土）性，结合垂直钻孔与本孔地质情况精准判识隐伏断层、划分围岩级别与风化程度、岩体渗透系数和渗透性，建立了一种用于深埋长隧道（洞）的小直径地球物理测井评价方法。SZYSD-1S孔测试结果表明，第四系与白垩系地层岩（土）性、断层破碎带的测井响应特征差异明显，岩体完整性系数为6%~82%，岩体质量为较完整-极破碎4个级别，风化程度为全风化-弱风化等4类，渗透系数为1.01×10-7~1.18×10-3 m/s，渗透性为弱透水-强透水，测井评价结果与实际试验结果基本一致。该方法是实现洋底深埋长隧洞精准勘察的一种必要手段，有效支撑服务粤港澳大湾区建设。 |
| 中文关键词:水平勘察孔 定向钻探 岩石质量 渗透系数 测井评价 深埋长隧洞 狮子洋 |
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| Research and application of the logging evaluation method for horizontal holes in the main channel of Shiziyang |
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| Abstract:In order to solve the problem of precise investigation for deep-long tunnels in the ocean floor of the main channel of Shiziyang， the storage logging system was adopted to obtain parameters such as natural gamma， resistivity， well depth， well temperature， well inclination， etc. in the long reach scientific drilling hole （SZYSD-1S） with large horizontal displacement/vertical depth ratio in the main channel of Shiziyang. The logging data were correlated to accurately divide the rock （soil） properties of the formation； and the geological conditions of vertical holes and the horizontal hole were combined to accurately identify the hidden faults， and divide the surrounding rock level and weathering degree， and the permeability coefficient and permeability of the rock mass. A small-diameter geophysical logging evaluation method was established for deeply buried long tunnels （holes）. The results of SZYSD-1S hole test show that the logging response characteristics of the rock （soil） and the fault fracture zones of the Quarternary and Cretaceous strata are obviously different： the integrity coefficient of rock mass ranges from 6% to 82%， the rock mass quality falls into four levels from relatively complete to extreme fractured with the weathering degree four categories from full weathering to weak weathering， the permeability coefficient ranges from 1.01×10-7 to 1.18×10-3 m/s with the permeability from weak permeability to strong permeability. The logging evaluation results are basically consistent with the actual test results. This method is a necessary means to achieve accurate investigation for deep-long tunnels in the ocean floor， and effectively support the construction of the Guangdong-Hong Kong-Macao Greater Bay Area. |
| keywords:horizontal investigation holes directional drilling rock quality permeability coefficient logging evaluation deep-long tunnels Shiziyang |
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