基于老测井系列的数字处理方法

DIGITAL PROCESSING METHODS BASED ON THE OLD LOGGING SERIES

随着油气田勘探开发的进一步深入和油气资源的逐渐贫乏,利用测井资料进行老井复查已经成为一些老油气田工作的重点。而老油气田测井解释工作最大的困难在于老的测井系列测井项目较少,测井质量不高,缺乏足够的测井信息。为此,以四川盆地的某老气田为例,提出了利用测井曲线相对齐全的关键井来构建其他老井测井曲线的新方法,并以岩心分析资料为研究基础,应用最优化测井解释方法,在准确识别岩性的基础上对该气田10口井完成较高精度的测井资料进行了数字处理。结果证明,该研究思路和方法对老井复查工作有一定的参考使用价值。

Along with the further exploration and development of oil and gas fields and the depletion of oil and gas resources,carrying out the old well repetition interpretation works by use of log data has already become very important at many old fields.The most difficulty on log interpretation of old gas fields lies in the limited data of the old logging series,the well logging quality is not high,lacks of enough well logging information.Taking an old gas field in the Sichuan Basin as an example,this paper selected the wells with complete logging suite,and took the core analysis data as the research understructure.On the basis of accurate lithology identification,the log data numerical processing with high precision was completed by applying optimal log interpretation method.The comprehensive reservoir log interpretation was carried out and a good result was obtained for the fine log processing and interpretation of reservoirs at 10 wells in this old gas field in the Sichuan Basin by use of such a method.It is shown that the research has a certain application value in data re-examination of old wells.