趋势面分析在YD油田测井曲线标准化中的应用

Application of Trend Surface Analysis to Logging Curves Standardization of YD Reservoir

YD油田是柴达木盆地的主要油气富集区之一,该区地质条件复杂,测井系列较多。由于不同时期、不同系列仪器刻度等不一致,测井数据间必然存在以刻度因素为主的误差。为消除研究区曲线刻度误差对测井曲线质量的影响,在总结前人研究成果的基础上,采用趋势面分析的方法对各关键井进行标准化处理。结果表明,由局部多项式趋势面标准化处理后的曲线所建立的储层参数解释模型,预测精度更高,在YD油藏能够取得较好的标准化效果,为下一步测井精细解释评价奠定了基础。

YD oilfield is one of the main reservoirs in the Qaidam Basin. The geological conditions are complex and there exist many logging series. Due to different periods, different series of instruments,the scale is inconsistent, and there must be a calibration error in the logging data. In order to eliminate the influence of the curve scale error on the quality of the logging curve, based on the previous research results, the trend surface analysis method is used to standardize the key wells. The results show that the reservoir parameter interpretation model established by the curve normalized by the local polynomialtrend surface has higher prediction accuracy and can achieve better normalization effect in the YD reservoir, which lays the foundation for further logging interpretation and evaluation.