自然伽玛能谱测井仪(SGS)及其应用

On Natural Gamma Spectrometer of Logger(SGS) and Its Application

自然伽玛能谱测井仪(SGS)是通过TCC编码传输到地面计算机处理得到钍(Th)、铀(U)、钾(K)三种元素的含量,以及总伽玛和去铀伽玛。仪器结构由探头和电路两部分组成,其内部设置了两个相关的温度稳定控制系统。根据现场测井及实际解释应用得出:利用自然伽马能谱测井能有效地识别岩性、区分粘土类型、识别高放射性储层和识别钾盐,对钻井工程和油藏开发具有重要的指导意义。

SGS obtains contents of three elements-thorium（Th）,uranium（U） and potassium（K）,total gamma and uranium-removal gamma through processing TCC code which is transferred to ground-based computer.The instrument consists of two parts-probe and circuit,inside which there are two interrelated control systems stabilizing temperature.The result of field logging and application of practical interpretation make a conclusion that SGS can distinguish effectively lithology,clay type,reservoir with high radioactivity and sylvine,which helps a lot in drilling engineering and reservoir development.