基于脉冲中子技术的非放射性示踪流量测井方法研究

Study on nonradioactive tracer flowrate logging method based on the pulse neutron technology

为了解决低注入量分层注入井的流量监测难题,开发一种无放射性风险,无井内沾污,流量测量下限低的测井方法。文章提出一种基于脉冲中子技术的示踪相关流量测井方法,采用无放射性物质作为示踪剂,利用示踪相关方法测量流量。基于理论分析结果开展了可行性室内试验及样机试制,同时在标准井开展了可行性试验。试验结果证明了非放射性示踪流量测井方法的可行性。

In order to solve the problem of flowrate monitoring in the low injection separate injection well, it is necessary to develop the logging method with nonradioactivity, no contamination and low limit. The tracer correlation flowrate logging method based on the pulse neutron technology is presented in the paper in which the nonradioactivity material is used as tracer and tracer correlation method is used for measuring the flowrate. The laboratory tests and prototype test are performed on the basis of the theoretical analysis results. And the feasibility test is carried out in the standard well.The experimental results proved the feasibility of the nonradioactive tracer flowrate logging method.