放射性示踪相关测井对分层注聚井适应性的分析

Applicability Analysis of Radioactivity Tracer Correlative Log in Separate Injection Well

传统同位素示踪测井、电磁流量测井和脉冲中子氧活化测井在聚合物分层注入井中难以测量注入剖面。放射性示踪相关测井用2个间距已知的伽马射线探测器测量随注入流体一同流动的放射性示踪剂的速度,进而得到注入流体的流量。该方法在聚合物分层注入井中成功测得大量注入剖面测井资料,反映了小层注入状况。与地层系数、地层连通性、注入压力等地质、开发情况对比分析表明该方法测井解释结果与地质动、静态资料比较符合。放射性示踪相关测井适用于聚合物分层注入井,测井资料可信,能有效地解决这类井的注入剖面测井问题。

The injection profile is unmeasurable in the polymer separate layer injection wells with the conventional isotope tracing logging, electro-magnetic flowrate logging and neutron oxygen activation logging. The radioactive tracer correlative log can get the flowrate through measuring the velocity of radioactive tracer which flows with the injected liquid by 2 given spacing gamma ray detectors. This method has successfully obtained lots of injection profile data in the separate layer polymer injection wells, which shows the injection status of the thin layers. Comparison with the geologic and exploring conditions, such as the formation factor, the formation connectivity and the injection pressure, shows that the log interpretation results by this method is in good accordance with the dynamic and static geologic data. It is concluded that the radioactive tracer correlative log is suitable in separate layer polymer injection wells with reliable logging data, and can effectively solve the injection profile measurement problem in this kind of well.