流体分子结构的探测是了解其物理、化学性质的基础.目前主要采用的实验室内分子结构探测技术包括光谱法和波谱法等，但这类测量方法具有测量效率低、需添加化学试剂、实验可重复性差等局限.基于低场核磁共振（NMR）技术进行流体组分的探测技术已十分成熟.该文提出进一步将该技术应用于烃类化合物流体分子结构的检测方法，并研发一种快速二维核磁共振驰豫测量脉冲序列和一套低场核磁共振流体在线检测系统.最终实现了一种快速、无损、清洁、有效的流体组分探测技术.
邓峰
,
肖立志
,
陶冶
,
刘新云
,
耿东士
,
王梦颖
. 低场核磁共振流体分子结构在线探测技术[J]. 波谱学杂志, 2017
, 34(2)
: 214
-222
.
DOI: 10.11938/cjmr20170211
The molecular structure of fluid influences its physical and chemical properties significantly. Current laboratory analysis methods, such as spectroscopy and spectral method, have the following disadvantages:low measuring efficiency, requirement of chemical reagents, and poor reproducibility. Low-field NMR fluid component analysis is a mature technology. In this study, we developed a set of low-field and on-line NMR fluid detection system and a rapid two-dimensional NMR relaxation measurement pulse sequence, which can be used for rapid, non-destructive, clean, efficient fluid component detection. The performance of the system and the pulse sequence was evaluated experimentally.
[1] COATS G R, XIAO L Z, PRAMMER M G. NMR logging principles and applications[M]. Houston:Gulf Professional Publishing, 1999.
[2] CASANOVA F, PERLO J, BLÜMICH B. Single-sided NMR[M]. New York:Springer, 2011.
[3] MATZKANIN G A. A review of nondestructive characterization of composites using NMR[M]. Holler P, Hauk V, Dobmann G, et al. Nondestructive Characterization of materials. Berlin:Springer, 1989:655-669
[4] SURYAN J. Nuclear resonance in flowing liquids[J]. Proc Indian Acad Sci Sect A, 1951, 33:107-111.
[5] CAPRIHAN A, FUKUSHIMA E. Flow measurements by NMR[J]. Phys Rep, 1990, 198(4):195-235.
[6] SINGER J R. Blood flow rates by nuclear magnetic resonance measurements[J]. Science, 1959, 130(3389):1652-1653.
[7] BLOEMBERGEN N, PURCELL E M, POUND R V. Relaxation effects in nuclear magnetic resonance absorption[J]. Phys Rev, 1948, 73(7):679-712.
[8] NICOT B, FLEURY M, LEBBOND J. A new methodology for better viscosity prediction using NMR relaxation[C]. Mexico:SPWLA 47th Annual Logging Symposium, 2006.
[9] NICOT B, FLEURY M, LEBBOND J. Improvement of viscosity prediction using NMR relaxation[C]. Houston:SPWLA 48th Annual Logging Symposium, 2007.
[10] SONG Y Q. Magnetic resonance at low magnetic field:Multi-dimensional experiment of relaxation and diffusion[C]. 杭州:第十八届全国波谱学学术年会, 2014.
[11] DENG F, XIAO L Z, LIU H B, et al. Effects and correction for mobile NMR measurement[J]. Appl Magn Reson, 2013, 44(9):1053-1065.
[12] BOUTON J, PRAMMER M G, MASAK P, et al. Assessment of sample contamination by downhole NMR fluid analysis[C]. Louisiana:SPE Annual Technical Conference and Exhibition, 2001.
[13] KOCHIN N E, KIBEL I A, ROZE N V. Theoretical hydromechanics[J]. Phys Today, 2009, 19(3):76.
[14] BINGHAM E C. Fluidity and plasticity[M]. USA:McGraw-Hill Book Co. 1922.
[15] CASSON N. A Flow equation for pigment oil-suspen-sions of the printing ink type[M]. Mill C C. Rheolgy of disperse systems. London and New York:Pergamon Press, 1959:84-104.
[16] HERSCHEL W H, BULKLEY R. Measurement of consistency as applied to rubber-benzene solutions[C]. Atlantic City:29th Annual Meeting of the American Society Testing Materials, 1926:621-633.
[17] BECKER E D, FERRETTI J A, FARRAR T C. Driven equilibrium fourier transform spectroscopy:A new method for nuclear magnetic resonance signal enhancement[J]. J Am Chem Soc, 1969, 91(27):7784-7785.
[18] MITCHELL J, HÜRLIMANN M D, FORDHAM E J. A rapid measurement of T1/T2:The DECPMG sequence[J]. J Magn Reson, 2009, 200(2):261-268.
[19] KAY L E, TORCHIA D A, BAX A. Backbone dynamics of proteins as studied by 15N inverse detected heteronuclear NMR spectroscopy:application to staphylococcal nuclease[J]. Biochemistry, 1989, 28(23):8972-8979.
[20] SADEGH BEIGI R. Appendix 5:Estimation of molecular weight of petroleum oils from viscosity measurements-fluid catalytic cracking handbook[M]. Second edition. Fluid Catalytic Cracking Handbook, 2000:342-343.
[21] EINSTEIN A. On the movement of small particles suspended in stationary liquids required by the molecular-kinetic theory of heat[J]. Annalen Der Physik, 1905, 322(8):549-560.
[22] DENG F, XIAO L Z, CHEN W L, et al. Rapid determination of fluid viscosity using low-field two-dimensional NMR[J]. J Magn Reson, 2014, 247:1-8.
