注水剖面大孔道问题分析与研究

Analysis and research on macropore in water injection profile

针对轮南油田在开发后期存在明显的大孔道地层导致同位数载体漏失而不能准确反映地层实际吸水情况的问题,根据实际注水测井剖面,识别了典型的大孔道现象,分析了地层形成大孔道的成因、采用井温曲线与物性资料进行定性分析,将同位素资料与流量资料结合定量解释大孔道地层,统计分析轮南油田典型大孔道地层问题不同解释结果的误差情况,进一步验证了结合流量资料得到的大孔道地层解释结果的合理性。

In al lusion to the later development stage of Lunnan oilfield, the problem of macropore formation is obvious, which direct ly led to the leakage of the isotope tracer carrier, as a result, the actual state of water absorption cannot be correctly reflected, and typical macropore phenomena are identified according to the actual logging injection profile,to analyze the reasons of the macropore,and quali-tative analysis of macropore formations are made by using well temperature curves and physical property data, and also, macropore for-mations are quantitatively interpretated by using isotopic data and flow data. A statistical analysis on the errors of the different interpre-tation results of typical macropore formations in Lunnan oilfield, verified the rationality of using combined data of isotopic data and flow data.