返注井段同位素示踪注水剖面的分析研究

On Isotope Tracer Injection Profile Logging in the Adverse Injected Intervals.

在放射性同位素示踪注水剖面测井中 ,对于一些油管喇叭口下过射孔层的笼统注水井 ,如果最上面的射孔层距喇叭口较远 ,如何判断同位素微球是注入水上返还是沉淀 ,从理论计算到现场实验对同位素微球在井下环境中的运动情况进行了分析研究。分析结果表明 ,注水量大于 2 0m3 d的井 ,选用同位素微球密度 1 0 6g cm3、粒径 10 0～ 60 0 μm的同位素示踪注水剖面测井施工工艺是合适的 ;

In radioactive isotope tracer injection profile logging,how do the isotope tracer grains move up and down along with the injected water in some commingled water-injected wells whose perforated intervals beyond the tubing bell mouth when the upper perforated intervals are farther from the bell mouth? Through theoretical calculation and experiments, we have found that it is appropriate to select isotope tracer with a density of 1.06 g/cm 3 and a grain diameter of from 100 to 600 μm if the injected water is more than 20 m 3/d. Success or failure in isotope tracer injection profile logging depends on the sinking speed of the tracer grains.