一种基于邻井资料的曲线标准化方法及其实现

A curve standardization method based on the data of neighborhood well and its realization

某油田59年内先后完钻1700余口井,测井系列繁多、测井时间跨度长。传统的直方图和趋势面分析方法造成标准化后的曲线不能正确反映地层的平面沉积特征,地层非均质性被削弱,不利于后期的油藏建模及数值模拟。文章利用直方图统计标准层标准值,用克里金算法拟合趋势面,通过参照邻井曲线标准值范围删除异常值对趋势面进行优化,创建了适合本地区的测井曲线标准化方法并进行软件实现,整个过程引入了研究人员自己地质认识,使标准化结果更符合地质实际,得到了油田专家的高度认可。

More than 1,700 wells have been drilled in a certain oilfield during the last 59 years, with a wide range of logging series and long logging time span. The standardized curve caused by the traditional histogram and trend surface method cannot correctly reflect the plane sedimentary characteristics of the stratum, which is unfavorable to the later reservoir modeling and numerical simulation. This paper uses the histogram to calculate the standard layer and its standard value, utilizes the Kriging algorithm to fit the trend surface, optimizes the trend surface by deleting the outlier via referring to the standard value range of the neighborhood well curve, and creates a standardized method for the logging curve suitable for the region and then implements the software. The whole process has introduced the researchers＇ own geological understanding, making the standardized results more consistent with the geological reality, and it is highly recognized by oilfield experts.