核磁共振法寻找岩溶裂隙水的地质效果

核磁共振找水方法是目前唯一可用来直接找水的地球物理方法 .在武汉地区岩溶裂隙水的勘查中 ,以核磁共振方法为主 ,配合使用电阻率法 ,进行资料的综合解释 ,取得了令人满意的地质效果 .核磁共振工作结果显示 ,在勘探范围内地下水存在四个含水层 ,其中深部的两个含水层为承压含水层 ,自旋—自旋弛豫时间反映出含水层孔隙度较大 ,地下水连通情况较好 ;电阻率资料反映 ,承压含水层对应着高阻基岩赋存的部位 ,推断是碳酸盐岩类岩溶裂隙水含水层 .钻探验证了两种物探方法的推断结果 ,打出了优质地下水 ,单井日出水量超过 10 0 0t .

Geological Effect of Nuclear Magnetic Resonance Method in Finding Fissure Water from Basement Rock

The Nuclear Magnetic Resonance (NMR) method is the only geophysical method to detect groundwater directly at present. In finding fissure water from the basement rock in Wuhan area by China University of Geosciences (CUG), NMR is mainly used and the resistivity method is coordinated to interpret the data comprehensively, and approvable results are obtained. The result shows that there are four beds of aquifer in the range explored, two of which in depth are confined aquifers. The spin spin relaxation time reflects the large cranny of aquifer and the good connection of groundwater. The information of resistivity shows that the confined aquifers are correlative to the occurrence position of resistance basement, and that the confined aquifers of karstic fissure water of carbonate are deduced. Drilling proves the deduction of NMR and the resistivity method, and high quality water is found, the output of a single well being above 1?000?t/d.