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目的放射性核素示踪测井技术为现代采油的关键核心技术。新型的双示踪薄层识别地面采集测井仪目前处于室内实验和现场测井试验阶段,为对此设备的辐射安全性进行放射卫生学评价。方法依据国家相关标准及方法,对释放器储藏坑周围、测井吊车周围、注水井口周围γ空气比释动能率,相关部位的表面放射性污染水平,测井现场土样和水样的~(137)Cs污染情况和对测井工作人员接受剂量进行监测分析。结果正常工况时,发生器存贮、运输、工作等场所,周围环境辐射为天然本底水平,未发现有放射性表面污染,对环境、工作人员与公众无辐射危害。操作发生器工作人员受到略高于本底的附加有效剂量,但远低于辐射剂量年目标管理限值5mSv;公众不受到高于本底的附加有效剂量。结论双示踪薄层识别地面采集测井仪新颖,其结构、辐射安全性、储运、操作与测井应用等方面有一定优势,有良好应用开发前景。
Purpose Radionuclide tracer logging technology is the key core technology of modern oil production. The new dual-tracing thin-sheet recognition surface acquisition logging tool is currently in laboratory testing and field logging test phase for radiological hygiene evaluation of the radiation safety of this device. Methods According to the relevant national standards and methods, the kinetic energy of γ air surrounding the reservoir around the well, around the logging crane and around the injection wellhead, the surface radioactivity level of the relevant sites, the soil samples and the water samples ) Cs contamination and monitor the logging staff to accept the dose. Results Under normal working conditions, the generator storage, transportation, work and other places, the surrounding environment is the natural background level of radiation, no radioactive surface contamination was found, no harm to the environment, staff and the public. The operating generator staff received an additional effective dose slightly above the background but well below the target management limit of 5 mSv for the radiation dose; the public is not subject to an additional effective dose above background. Conclusion The dual tracing thin layer recognition ground acquisition logging tool is new and has some advantages in terms of structure, radiation safety, storage and transportation, operation and logging applications, and has good application and development prospects.