摘要
致密油储层评价是致密油有效开发的一项重要内容，储层特征不同，考虑的出发点也不同，针对安边地区长7致密油储层，采用模糊数学综合评判的原理和方法，着重依据地应力场研究成果及裂缝预测成果．结合研究区实际情况确定了影响储层各因素的隶属度函数，进行相关性分析给予权重值。最后按相同步长网格化．建立各因素评判矩阵，根据计算模型求取评价阈值，再以目前勘探成果为依据，多参数综合评价确定有利区、次有利区和不利区的阈值范围。该评价结果具有很好的一致性，解决了储层单因素评价过程中出现的评价结果相互交叉、不唯一的问题，有利于对致密油储层进行正确、合理的评价。
Comprehensive evaluation of tight oil reservoir is a critical aspeet of the effective development of tight oil reservoirs. Aimed at tight chang7 oil reservoirs in Anbian area, using fuzzy mathematical evaluation theory and method, the membership grade function that impacts various factors of reservoirs is determined on the basis of research resuhs on the crustal stress field and fracture prediction results, combining with the actual situation of the study area, performing correlation analysis to give the weight value. Finally, accord- ing to the same steps to implement gridding, various factors evaluation matrix was established. The evaluation threshoht value is obtained according to the calculation model. And then the threshold ranges of favorable areas, sub-favorable areas and unfavorable areas are determined on the basis of the current exploration results and comprehensive evaluation with multiple parameters. The evaluation resuits have good consistency. The problems of evaluation results＇ crossing each other and not-unique have been solved that appear in the process of reservoir evaluation with single factor. It＇ s conducive to the proper and rational evaluation of tight oil reservoirs.
关键词
致密油
储层评价
安边地区
tight oil reservoir
reservoir evaluation
Anbian Area in Northern Shaanxi
