【摘要】 随着大庆油田萨北开发区开发程度的加深,储层非均质性矛盾日益严重,在密集的井网条件下如何有效预测井间河道砂体展布已成为提高采收率的关键问题。以大庆萨北开发区北二西区块为例,在多学科综合思想的指导下,充分利用井震结合的方法刻画河道砂体平面展布特征。在地震地质层位追踪的前提下沿参考层分别向上向下开取一定的时窗提取多种地震属性,以反距离加权平均法提取井点属性,利用某商业软件的二维聚类分析及作者研究的线性回归分析与聚类分析方法评价地震属性与井点处储层参数的相关性。研究认为,该方法可用于优选刻画河道砂体的地震属性。在此基础上,结合井数据的纵向优势与地震属性的横向优势编制了目的层段的河道砂体平面展布图。更多还原

【Abstract】 As the development areas in east China have been in the phase of super-high water cut period,the distribution of remaining oil gradually becomes increasingly complex.In order to figure out the reasons which control the distribution of the remaining oil,the effective prediction of the distribution of interwell river channel sand body has become an urgent issue in EOR(enhanced oil recovery).Seismic microfacies mapping can be time consuming,even if only a basic overview of the microfacies distribution is needed.In this paper,based on the high resolution well log and seismic data,a study of interwell microfacies with the help of high resolution well log and 3-D seismic data in Sabei development area was carried out.Seismic attributes were extracted on the premise of seismic horizon tracing in a dense well pattern and the seismic attributes on wells were determined by inverse distance weighted mean method.The clustering procedure correlation analysis method,the linear and multivariate statistical correlation analysis between seismic attributes and well log data were used to deduce relationships between seismic data and reservoir physical information(including effective thickness,distribution of sedimentary facies). Finally,we demonstrate the possibility of using multi-attribute results to foster an understanding of depositionally oriented trends in interwell river channel sand body distribution that have been observed in the buildups we got in the analysis.Then the planar map of depositional microfacies distribution was mapped with the result of well-seismic data and it would lead us a new understanding of how to find remaining oil.更多还原