提高化学示踪剂检测准确度实验研究

Experimental study on improving the accuracy of chemical tracer test

关键词:  化学示踪剂  硝酸盐  硫氰酸盐  尿素 

Key words:  chemical tracer  nitrate  thiocyanate  carbamide

摘要:

针对胜坨油田地层水组分复杂、加药类型多,影响化学示踪剂检测准确度的问题,开展了硝酸盐、硫氰酸盐、尿素3种示踪剂的检测准确度分析。结合示踪剂检测方法,对比了蒸馏水、注入污水、采出液配制示踪剂溶液的检测差异,提出了制作标准曲线的方法；开展了氮气泡沫驱起泡剂、注水用缓蚀剂、杀菌剂、二元复合驱用表面活性剂对示踪剂检测结果的影响研究。结果 表明,尿素示踪剂的检测受各类药剂的影响较小,且成本较低,确定为适合胜坨油田的示踪剂。现场应用验证了示踪剂检测方法的适应性。

Abstract:

Aiming at the problems of component complexity of layer water, multi-type dosing, affecting the accuracy of chemical tracer test in Shengtuo Oilfield, three kinds of tracers’ detecting accuracy about nitrate, thiocyanate, carbamide were analyzed. Combining with tracer detecting methods, the difference of test results among distilled water, injection water, produced fluid configured tracer was compared, and the method of making standard curve was proposed. The effect of nitrogen forming flooding foaming agent, injecting anti-corrosive agent, biocide, binary combination driving surfactant on tracer test results were researched. The result showed that carbamide tracer was less affected by various types of agents and its cost was lower, which was identified to be optimum tracer for Shengtuo Oilfield. The applicability of the method was verified by the field application.