Because of the use of high energy neutron and gamma ray with strong penetrability,it is able to detect signals of the active Oxygen moving with water flow through tubing,casing even cement annulus.

• 它利用具有强穿透能力的高能快中子和伽马射线,可穿过油管、套管甚至水泥环测得随水流动的活化氧伽马信号,通过解析测得的伽马时间谱来计算相应的水流速度,并在已知流动截面面积时进一步算出水流量。