To extend the analysis period, he said, sometimes a double dose of tracer material is used to distribute detectable concentrations for up to a year.
他说，为了延长分析周期，我们有时会用双倍剂量的示踪剂材料来增加示踪剂分散后的可测浓度，并且可使其使用周期长达一年之久。
All things being equal, on a 30-stage well, the tracers from each stage would represent between 3% and 4% of the total concentration of tracer material sent downhole.
在所有条件相同的条件下，一口压裂30段的井中每个层段的示踪剂量占所有被注入井下示踪剂总量的3%到4%。
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