【摘要】 地面核磁共振方法是应用地球物理中新发展起来的一种直接找水方法,它利用水中的氢核在一定频率的外场作用下产生核磁共振现象实现对地下水的探测。对测量所得的NMR信号进行分析处理,可以确定地层的含水量、厚度和深度以及平均孔隙度。由于NMR信号微弱、信噪比低,因此所获资料需要进行综合解释和联合反演以提高反演解释的可靠性。以中国地质大学核磁共振科研组在西北某油田的找水工作和国外学者相关的研究成果为例,证实了这一研究方法的可靠性。更多还原

【Abstract】 SNMR(Surface Nuclear Magnetic Resonance) method is a quite new method for direct detecting groundwater in applied geophysics. The detection utilizes the nuclear magnetic resonance of the protons excited by the electromagnetic field with a special frequency. NMR signals are analyzed to determine the water content, thickness, depth and average porosity of the aquifer. Since the NMR signals are faint and the SN ratio is low, integrated interpretation and joint inversion should be used to improve the reliability of the inversion. It is explained by the examples of water detection achievements made by research group of China University of Geosciences in an oil field in northwest of China and relative researches made by other country’s scholars.更多还原