测井曲线标准化方法优选及其效果评价——以延长油田化子坪区块为例

Optimization and Effect Evaluation of Logging Curve Normalization Methods:Taking Huaziping Area of Yanchang Oilfield as an Example

为减小或消除同类测井曲线间的系统误差,统一研究区内同种测井曲线的刻度,提高测井解释精度和测井信息在全油田范围内解决问题的能力,综合考虑研究区块地质实际和批量实施测井曲线标准化结果的统一性和操作便捷性,利用频率直方图法和趋势面分析法并采用GPT软件批量对研究区块井AC、RT测井曲线进行标准化处理。利用声波曲线套管标准值,通过计算孔隙度和岩心孔隙度对比、AC-RT等值图对比对标准化效果进行了评价,结果表明:标准化后其曲线合格率上升30%以上,提高了测井解释精度和准确性,对全油田实施测井曲线标准化有一定的参考价值。

In order to reduce or eliminate the systematic error between the same type of logging curves,Logging curve normalization can reduce or eliminate the systematic error of the same logging curve,unify the scale of the same logging curves in the study area and improve the accuracy of logging interpretation and the ability of logging information to solve the problem in the whole oilfield,under comprehensively considering the geological reality of Yanchang oilfield and the result uniformity and operation convenience of batch logging curve standardization,the AC and RT logging curves in the study area were standardized by using frequency histogram method,trend surface analysis and GPT software,and the normalized results were evaluated by comparing with the casing standard values of AC curve,comparing the calculated porosity with tested core porosity and comparing the AC-RT equivalence graphs.It is shown that the pass rate of logging curves is increased by more than 30%after the standardization,which improves the precision and accuracy of logging interpretation,and provides a reference for the implementation of the whole oilfield logging curve normalization.