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横向弛豫时间 T2 、含氢指数 H I和扩散系数 D是核磁共振测井技术中重要的参数 ,通过实验研究发现矿化类型和矿化度对它们的影响是不同的。具体的变化规律是 :1扩散系数随矿化度的增加而减小 ,但矿化类型不同 ,扩散系数受矿化度的影响不同 ,受 Ca Cl2 溶液的影响很小 ,而受 Na Cl和 KCl溶液影响相对大 ;2自由流体的横向弛豫时间 T2 随矿化度变化。对于Ca Cl2 溶液 ,T2 随矿化度的增加而减小 ,而对 Na Cl和 KCl溶液 ,T2 随矿化度的增加而增大 ;3含氢指数 H I随矿化度的增加而减小 ,Ca Cl2 溶液相对 Na Cl和 KCl溶液受到的影响要小得多
Lateral relaxation time T2, hydrogen index H I and diffusion coefficient D are important parameters in nuclear magnetic resonance logging technology. Experimental results show that the influence of mineralization type and salinity on them is different. Specific changes are: 1 diffusion coefficient decreases with increasing salinity, but different types of mineralization, the diffusion coefficient is affected by the degree of salinity, CaCl2 solution by a small impact, but by NaCl and KCl The effect of solution is relatively large; 2 The horizontal relaxation time T2 of free fluid varies with the salinity. For CaCl 2 solution, T2 decreases with the increase of salinity, while T2 increases with the increase of salinity for NaCl and KCl solutions. 3 The hydrogen index HI decreases with the increase of salinity, The effect of CaCl 2 solution on NaCl and KCl solutions is much smaller