基于专家系统的粉砂岩低渗透储层沉积微相识别

Identification of sedimentary microfacies of low-permeability siltstone reservoirs by expert system

针对以粉砂岩为主的低渗透储层,提出了以专家系统为基础的专家经验参数逻辑法进行沉积微相识别。该方法利用岩心、录井和测井资料,以定性参数为主,辅以定量参数进行综合判别,摆脱了单纯数理统计逻辑判别的缺点;测井资料与相邻探井岩心、录井资料的匹配丰富了测井解释的地质意义;分形理论的应用加强了微相判别的准确性;在大北特低渗透油田取得了较好的应用效果。该方法对于粉砂岩低渗透储层沉积微相的识别是切实可行的。

The logical discriminance using expert experiential parameters is put forward to identify sedimentary micro-facies of low-permeability siltstone reservoirs.Based on core and a lot of well logging and mud logging information,micro-facies are recognized using many quantitative and qualitative parameters.The advantages of this method are as follows: demerits of solely using mathematic data are remedied;the matching of well logging information with core and mud logging information enriches logging interpretation ability;fractal theory enhances veracity of identifying micro-facies.The discriminance works efficiently in Dabei low-permeability oilfield.In short,this technique is feasible to identify micro-facies of low-permeability siltstone reservoirs.