^35S-KSCN示踪剂的油田井间监测方法

研究了同位素示踪剂^35S-KSCN在油田井间示踪测试中的分析方法并将其应用于矿场进行示范试验。条件实验结果显示，油田水溶液中的微量^35S-KSCN在0．5～2．0mol／L的HCl体系中与Zn^2＋配合可被磷酸三丁酯（TBP）定量萃取。用液体闪烁计数器测量^35S产生的β射线，最小探测下限为0．02Bq／L，该法回收率〉90％，0．02～5Bq／L线性良好，R^2=0．9995。通过矿场示范试验得到完整数据，验证了^35S-KSCN示踪剂是一种稳定的水驱示踪剂；同时也表明了该法简便、快速，适用于油田井间示踪测试。

Inter-well Tracer Test Method for 35S-KSCN Isotope Tracer in Oil Field

The isotope tracer ^35S-KSCN and its trace test in oil field were described. An extraction method for 1 000 mL ^35S-KSCN sample from oil field were investigaged. The experiment indicated that the microamount ^35S-KSCN could be extracted quantitatively with TBP at the range of 0.5-2.0 mol/L HCl. The activity of ^35S-KSCN was determined with a liquid scintillation counter, the minimum detectable limit was 0.02 Bq/L, the recovery rate of this method was more than 90%, the linearity relation from 0. 02 Bq/L to 5 Bq/L was good, R^2= 0. 999 5. The results showed that the tracer was a steady tracer in water flood reserves. This method is simple and rapid, and it can be used in the inter-well tracer test technology.