纯化油田沙四下亚段水淹层测井响应特征研究

The Logging Response Features of Water-flooded Reservoirs in Es_4~L of Chunhua Oilfield

水淹层识别技术已成为油田开发调整方案的重要方法。针对纯化油田古近系沙河街组沙四下亚段储层薄、物性差、非均质性强、注入水类型复杂等特点,按照不同的水淹类型总结出水淹层的测井响应特征,提出了利用自然电位、感应电导率、4m底部梯度电阻率等测井资料进行水淹层识别的方法和利用高频感应测井划分薄层及进行水淹层识别的方法。该方法可以按照不同的水淹类型得出其测井响应特征,提高了水淹层评价的成功率。

The water-flooded reservoir identification technology has been one of the significant methods for adjustment plans of oilfield development.In consideration of the characteristics of thin reservoirs,poor physical property,strong heterogeneity and complex injection types in Paleogene' EsL4,the logging response features of water-flooded reservoirs were summed up according to different flooding types.The method for identifying water-flooded reservoirs such as the SP,induction conductivity,4m bottom gradient electrical resistivity,and method of high-frequency induction to demarcate the thin layers and water-flooded reservoirs were proposed.The method is used to obtain the log response features according to different types of water-flooding,it improves the success rate for water-flooded reservoir evaluation.