Development and application of NDL461 digital comprehensive logging tool
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First author:FENG Yanqiang,male,born in 1984,senior engineer,focusing on nuclear geophysical instrument R & D. E-mail:fengyanqiang_2005@163.com |
Received date: 2024-12-26
Revised date: 2025-02-18
Online published: 2025-10-24
Supported by
Research and Development of Technology and Equipment for Direct Uranium Measurement Using Gamma Spectroscopy of CNNC(物KB2201)
With the rapid development of sandstone-type uranium exploration in China, the workload of production logging has been increasing year by year. Simultaneously, with breakthroughs in the exploration of the “second prospecting space”,the logging depth is gradually increasing to 1 000 meters. The existing logging equipment requires 2-3 downhole operations to complete uranium geophysical logging,resulting in long logging times and risks such as borehole collapse and pipe sticking. By developing a modular multi-parameter downhole sub,we have addressed the issues of mutual constraints and interference among electrical,acoustic,and radioactive parameters in logging applications. This has led to the creation of a flexible downhole probe that can be combined according to actual application needs. We have also developed an integrated ground control platform and accompanying logging data acquisition and processing software, forming a highly integrated, noise-resistant, and fast-responding digital control system. This has culminated in the development of the new-generation NDL461 digital integrated logging tool. This logging tool has passed third-party verification and has been field-tested in the Songliao,Qaidam,Yili,and Tarim basins,demonstrating its stability,accuracy,and applicability. The developed logging tool provides technical equipment support for China’s fourth-generation uranium exploration technology system.
FENG Yanqiang , BU He , QIAO Yongcheng , HUANG Xiao , SHAO Shuai , YU Honglong , ZHAO Xu , LIU Lei , LIU Fuqiang . Development and application of NDL461 digital comprehensive logging tool[J]. World Nuclear Geoscience, 2025 , 42(2) : 219 -229 . DOI: 10.3969/j.issn.1672-0636.2025.02.001
表1 放射性模块计量检定数据统计表 Fig. 1 Statistics on radioactive module metrological verification data |
| 模型编号 | 实测数据/cps | 平均值/cps | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| UF-0.03 | 800 | 799 | 812 | 803 | 806 | 808 | 822 | 814 | 805 | 797 | 807 |
| UF-0.2 | 5 560 | 5 564 | 5 527 | 5 534 | 5 535 | 5 580 | 5 560 | 5 488 | 5 564 | 5 470 | 5 538 |
| UF-0.5 | 14 308 | 14 320 | 14 311 | 14 300 | 14 318 | 14 249 | 14 273 | 14 268 | 14 266 | 14 240 | 14 285 |
| UF-1.0 | 26 572 | 26 562 | 26 552 | 26 478 | 26 412 | 26 490 | 26 503 | 26 508 | 26 645 | 26 643 | 26 537 |
| UF0.01-ThF0.03 | 578 | 586 | 584 | 586 | 580 | 582 | 570 | 567 | 567 | 574 | 577 |
| ThF-0.05 | 514 | 517 | 531 | 528 | 524 | 521 | 537 | 538 | 530 | 531 | 527 |
| K6 | 43 | 42 | 40 | 41 | 41 | 41 | 40 | 38 | 39 | 40 | 41 |
| 本底F0 | 9 | 11 | 11 | 12 | 10 | 11 | 11 | 12 | 11 | 10 | 11 |
表2 检定模型实测误差统计表 Fig. 2 Statistics on calibration model measured error |
| 模型编号 | 标称铀含量/10-6 | 测量铀含量/10-6 | 相对示值误差/% |
|---|---|---|---|
| UF0.01-ThF0.03 | 99.0 | 97.6 | -1.4 |
| UF-1.0 | 10 930.0 | 10 934.1 | 0.0 |
图7 NDL461测井仪与现有设备定量γ测井曲线对比图Fig. 7 Comparison diagram of quantitative gamma logging curves between NDL461 logging system and existing equipment |
表3 定量γ测井解释结果对比统计表 Fig. 3 Statistics on the error of quantitative gamma logging interpretation results |
| 对比 设备 | 矿段位置 | 钻孔 直径/ | 冲洗液吸收系数/ | 解释结果 | 岩性 | 相对 偏差/ | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| 矿层 厚度/ | 矿石 品位/ | 矿石米 百分数/ | 平米 铀量/ | |||||||
| 顶深/ | 底深/ | H | C | C·H | C·H·ρ | |||||
| m | mm | % | m | 0.01 % | m·% | (kg·m-²) | % | |||
| NDL461 | 392.30 | 393.10 | 221.32 | 31.85 | 0.80 | 1.20 | 0.009 6 | 0.20 | 粉砂质泥岩 | 0.00 |
| 现有设备 | 392.35 | 393.10 | 221.43 | 31.86 | 0.75 | 1.27 | 0.009 5 | 0.20 | ||
| NDL461 | 413.35 | 414.80 | 213.28 | 31.26 | 1.45 | 1.17 | 0.017 0 | 0.36 | 细砂岩 | -2.34 |
| 现有设备 | 413.40 | 414.75 | 212.89 | 31.23 | 1.35 | 1.28 | 0.017 2 | 0.37 | ||
| NDL461 | 422.85 | 426.95 | 211.78 | 31.14 | 4.10 | 2.76 | 0.113 2 | 2.41 | 细砂岩 | 2.12 |
| 现有设备 | 422.90 | 426.95 | 211.69 | 31.13 | 4.05 | 2.74 | 0.110 8 | 2.36 | ||
| NDL461 | 426.95 | 428.30 | 236.74 | 32.72 | 1.35 | 3.39 | 0.045 8 | 0.97 | 粉砂质泥岩 | -2.52 |
| 现有设备 | 426.95 | 428.30 | 235.99 | 32.68 | 1.35 | 3.48 | 0.047 0 | 1.00 | ||
图8 NDL461数字综合测井仪与现有设备在松辽盆地某钻孔测井数据对比柱状图Fig. 8 Comparison of logging data of a borehole in Songliao basin by NDL461 digital comprehensive logging tool and existing equipment |
本文研究工作得到中核铀业有限公司、核工业二四三大队、核工业二〇三研究所、核工业二一六大队、中核新疆矿业有限公司以及核工业航测遥感中心等单位领导、专家的指导和帮助,提供了宝贵的试验现场和经验反馈,在此一并表示诚挚的感谢!
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