国产中子管在华北油田的应用

Application of China-made Neutron Tubes in Hua Bei Oilfield

国产中子管在华北油田已测井38口。在判断水淹层、正确评价低阻油层和油层方面见到了较好的效果。西仪厂生产的优质国产中子管发生器性能稳定,使用寿命长,温度指称高,能适用中、深井作业,可替代进口的中子发生器。在油桶内和水桶内多次打靶实验,平均差值为0.21左右,达到了测井要求。目前,已建立了适合华北油田地质状况,用C/O划分油水层的解释标准;解释油层,水层和水淹层符合率高达80％。

Su Zhanghai. Application of China-made Neutron Tubes In Hua Bei Oilfield. WLT, 1993, 17(5): 387～389 38 wells in Hua Bei Oilfield have been logged with domestic neutron tubes in C/O log, and good results have been obtained in determining watered-out zone, low resistivity oil-bearing zone and off-bearing zone·High quality neutron tubes made by XPEIC are stable in performance and long-life in use. Because of their high temperature ratings, they are adaptable to medium-deep and deep well operations and can replace the imported ones. Tests made in oil-sand or water sand calibrator have proved the average difference is about 0.21 ,which is up to C/O logging requirements. An interpretation criterion for identifying oil and water bearing zones which suits for the geological status of Hua Bei Oilfield has been set up, and the consistent rate of the interpretation result with well test result is up to 80％.