过套管地层电阻率测井在砂岩油田应用的试验研究

On Applications of CHFR Logging in Sandstone Oilfield

为了探讨过套管地层电阻率测井 (CHFR)在砂岩油田、特别是砂泥岩薄互层层系油井的适用性 ,在大庆油田进行了现场测井试验。试验结果表明 ,在新完钻且未射孔生产的套管井中 ,CHFR测量的地层电阻率与其裸眼井测井电阻率有着较好的一致性 ;在已投入生产的老油井中 ,能够较好地评价储层的剩余油饱和度及水淹程度 ;此外 ,对部分地层电阻率异常响应的原因进行了初步分析。

Field logging tests were made in Daqing Oilfield in order to verify their applicability in the sandstone oilfield, especially in the well the formation series is consist of thin and across shaly-sandstone. The well logging testing shows that measurements made with CHFR tool are very well matching with open hole resistivity in a new cased hole. The tool also can be used for evaluation of formation oil saturation and formation flooding degree perfectly in an old producing well. The causes of resistivity abnormity are also discussed in the paper.