小直径碳氧比能谱测井仪

Slim Carbon-Oxygen Ratio Spectrum Logging Tool

碳氧比能谱测井方法作为油井套后测量剩余油饱和度的有效手段已得到逐步应用。在过去很长一段时间里,国内的测井公司通过自主研究和引进技术的方式具备了在套管井内测量碳氧比的技术服务能力。随着海外市场的拓展,过油管测量碳氧比的需求逐渐增多。这就要求碳氧比仪器的直径缩小到适当的程度,以满足过油管测量的环境。中国石油大庆钻探工程公司测井公司通过缩小中子发生器和伽马射线探测器的直径,解决了研制小直径碳氧比能谱测井仪器的两大关键技术,采用厚膜电路技术使仪器电路的直径得到有效缩小,成功研制了直径为43mm的小直径碳氧比能谱测井仪器。文章介绍了仪器的工作原理、总体结构和主要技术参数,经过室内测试、现场试验和技术服务等过程的检验,现已成为过油管测量含油饱和度的自主创新产品。

Carbon-oxygen logging, as a useful method monitoring oil saturation of a well after cased, has been used for a long time. Chinese logging companies had the ability of providing the service based on carbon-oxygen logging by buying or creating instruments. Requirement on logging through tubing pressed them continuously due to expending of servicing abroad. The tool has to be slim so that it could do the job on through-tubing conditions. That neutron generator and gamma ray detector had been reduced provided the key technology on creating a slim carbon-oxygen ratio spectrum tool. Micro-electronics contributed its share too. All the attempting succeeded and a 43mm-diameter carbon-oxygen ratio spectrum tool became a product expected. This paper introduced the working principle, overall structure and main technical parameters of the tool. The tool was labeled self-creating after being lab-tested and tested practically and providing real service.