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您的检索式：作者名="S.Anferova"
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| 1 | Heavy oil component characterization with multi-dimensional unilateral NMR显示文摘Heavy oil is a complicated mixture and a potential resource and has attracted much attention since the end of last century. It is important to characterize the composition of heavy oil to enhance its recovery efficiency. A designed unilateral Nuclear Magnetic Resonance (NMR) sensor with a Larmor frequency of 20 MHz and a well-defined constant gradient of 23.25 T/m was employed to acquire three-dimensional (3D) data for three heavy oil samples. The highly-constant gradient is advantageous for diffusion coefficient measurement of heavy oil. A fast data-implementation procedure including specially designed 3D pulse sequence and Inversion Laplace Transform (ILT) algorithm was adopted to process the data and extract 3D T1-D-T2 probability function. It indicates that NMR relaxometry and diffusometry are useful to characterize the components of heavy oil samples. NMR results were compared with independent measurements of fractionation and gas chromatography analysis. | Liu Huabing Xiao Lizhi Guo Baoxin Zhang Zongfu Zong Fangrong Deng Feng Yu Huijun V.Anferov S.Anferova | 2013 | Petroleum Science2013，10，3： | 4 |
| 2 | 梯度场核磁共振测井仪电子线路设计显示文摘介绍梯度场核磁共振测井仪控制和采集电路、功率放大电路、Q-转换电路、隔离电路和接收电路等。解决核磁共振测井仪大功率发射和微弱信号检测的技术难题。射频脉冲发射完后,能尽快泄放天线中储存的能量;脉冲发射和能量泄放时可对接收电路进行高压隔离保护。介绍各关键电路的设计原理,并利用所设计的电子线路和自制核磁共振测井仪探头,在实验室条件下对硫酸铜水溶液进行测量,得到满意结果。该电子线路已成功应用于自制梯度场核磁共振测井仪样机,对随钻核磁共振测井仪和井下核磁共振流体分析同样具有重要的参考价值。 | 于慧俊 肖立志 V.Anferov S.Anferova 朱万里 李新 | 2012 | 测井技术2012，36，2： | 2 |
| 3 | 核磁共振测井仪低噪声模拟接收电路设计显示文摘设计了一种用于核磁共振测井仪的低噪声模拟接收电路。第1级放大为自主构建的仪器用放大器,其增益为52dB,选用最佳源电阻与天线谐振阻抗相近的超低噪声宽带运放LMH6626保证电路的低噪声性能。对第1级放大器的噪声性能进行了理论分析,其噪声系数为1.45。实验测试结果表明,电路最大增益为112dB,频率范围为400kHz~1MHz,可对核磁共振信号进行低噪声放大,并已成功应用于核磁共振测井仪实验室样机中。 | 于慧俊 肖立志 朱万里 李新 S.Anferova V.Anferov | 2013 | 测井技术2013，37，2： | 2 |
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