小波分析联合灰色系统理论在沉积微相研究中的应用——以丰富川油田长2_1储层为例

Application of wavelet analysis and grey system theory to sedimentary microfacies identification:An example from Chang 2_1 reservoir in the Fengfuchuan Oilfield,Ordos Basin

丰富川油田地质特征复杂,利用常规方法识别沉积微相存在一定难度和多解性。针对这一问题,采用小波分析技术建立精准的地层格架,同时联合灰色系统理论分析技术,优选出适合研究区的沉积微相评价参数,以及确定了评价标准和权系数,并对研究区进行了沉积微相综合研究。结果表明:小波分析与灰色系统理论分析技术在丰富川油田应用取得了良好的效果,为该区沉积微相研究提供了一种可行的定量分析方法,为油田开发方案调整提供了依据,对其他地区沉积微相研究具有一定的借鉴作用。

Because of complex geologic characteristics of Fengfuchuan oilfield,it is difficult to identify sedimentary microfacies by conventional approach.In order to solve this problem,wavelet analysis technique was used to carry out stratigraphic division and establish stratigraphic sequence.Based on the grey system technique,the evaluation parameters,criterion and weight coefficient which are suitable for the study area were chosen to identify sedimentary microfacies.The result shows that the first using of wavelet analysis and grey theory to sedimentary microfacies identification in Fengfuchuan Oilfield achieved good results,and it provides a feasible method to sedimentary microfacies research and can service for development adjustment of oilfield.