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近钻头随钻伽马成像系统研制及应用 被引量:9
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作者 郑奕挺 方方 +2 位作者 吴金平 李继博 张卫 《东北石油大学学报》 CAS 北大核心 2020年第3期70-76,126,I0005,共9页
为解决常规地质导向系统测量盲区大、地层响应滞后等问题,采用方位伽马成像测井和无线电磁波通讯一体化设计,研制近钻头随钻伽马成像系统。该系统集成近钻头伽马成像探测短节、井下无线电磁波短传子系统和地面实时成像导向软件等,具有... 为解决常规地质导向系统测量盲区大、地层响应滞后等问题,采用方位伽马成像测井和无线电磁波通讯一体化设计,研制近钻头随钻伽马成像系统。该系统集成近钻头伽马成像探测短节、井下无线电磁波短传子系统和地面实时成像导向软件等,具有测量零长短、方位成像精度高、无线电磁波传输距离远等特点。现场应用结果表明:在保证测量、施工工艺等稳定性前提下,近钻头随钻伽马成像系统可以实时获取钻头附近的地层方位伽马成像图,实现跨螺杆动力钻具无线电磁波通讯。该结果可为定向井、水平井勘探开发提供技术支持。 展开更多
关键词 近钻头成像 随钻测井 地质导向 无线短传 方位伽马 工具面检测
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Recent advances in biological detection with magnetic nanoparticles as a useful tool 被引量:6
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作者 Liwei Lu Xiuyu Wang +1 位作者 Chuanxi Xiong Li Yao 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第5期793-809,共17页
Magnetic nanoparticles have emerged as a powerful tool for magnetic resonance imaging, biodetection, drug delivery, and hyperthermia. This review focuses on the biological detection of magnetic nanoparticles as well a... Magnetic nanoparticles have emerged as a powerful tool for magnetic resonance imaging, biodetection, drug delivery, and hyperthermia. This review focuses on the biological detection of magnetic nanoparticles as well as their physicochemical properties. Substantial progress in the sensitivity of detection has been made by developing variety of methods. Five applications of magnetic nanoparticles in biological detection are discussed in this review: magnetic separation, magnetic sensing, magnetic manipulation, magnetic catalysis, and signal enhancer for surface plasmon resonance(SPR). Finally, some future trends and perspectives in these research areas are outlined. 展开更多
关键词 magnetic nanoparticles biological detection sensitivity METHODS
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