聚合物驱水淹层测井响应特征

Log Response Features of Waterflooded Zones in Polymer Flooding Oilfield

孤东油田八区注聚合物后所采集的测井资料与注聚前对比 ,水淹层差别非常大 ,而且根据所解释结果射开的层位出现了异常现象 ,解释为油层或弱水淹层的砂体射开后出水或出聚合物。首先分析了这些异常曲线的特征 ,从其机理和成因角度出发 ,分析了其异常的原因 ,证实了聚驱和水驱油层相比 ,水淹层测井响应特征有本质的区别 ,总结出了聚合物驱水淹油层判别标准 ,对今后聚合物驱油测井分析解释具有重要参考意义。

Comparison between log data before and after polyme-injection in the No.8 block of Gudong Oilfield reveals that the waterflooded zones have changed seriously and the perforated zones also become abnormal, e.g.,some oil or weak waterflooded zones as interpreted before produced water or polymer solution after they were perforated. Through analysing the abnormal log characteristics and why the zones produced water or polymer solution, we saw that log responses to waterflooded zones in polymer flooding oilfield are essentially different from that to water flooding. The identification standards for polymer waterflooded zones are presented to provide a significent reference for log interpretation in polymer flooding oilfield.