摘要
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
The experiment illustrated that the types of solution and salinities have different influence on the parameters. Three conclusions could be made from the experimented results. Firstly, diffusion coefficient of free fluid decreases as the salinity increases. But the influence depends on solution types. Secondly, hydrogen index of free fluid decreases with the increase of salinity. But CaCl 2 has relatively less effect on it. Lastly, T 2 of free fluid varies with different salinities and solution types. For NaCl and KCl solution, the T 2 increases as the salinity increases. But the T 2 of CaCl 2 decreases when the salinity increases.
出处
《测井技术》
CAS
CSCD
2001年第6期401-404,共4页
Well Logging Technology
基金
国家自然科学基金 (No.:498740 2 8)资助项目
