灰关联分析在砂岩储层评价中的应用

Application of Grey Association Analysis in Evaluation of Sandstone Reservoir

对砂岩储层的评价来说,由于影响因数众多,储层定量评价难度较大。灰关联法能通过关联度分析及确定各评价因素的权重系数来理清系统中各因素间的主次关系,从而对目的层段砂岩储层质量进行了分类评价。本文以王集油田东区的砂岩储层为研究对象,运用灰关联分析理论,采用权重系数的方法优选了有效厚度、孔隙度、渗透率、饱和度等4个评价因素,并对该区块的储层进行了评价。其评价结果与其他评价方法的结果类似,表明这种基于灰关联分析理论的砂岩储层评价的结果是较为客观和可靠的。

There are many factors influencing the sandstone reservoir evaluation, it is difficult to evaluate sandstone reservoir quantitatively. Grey association analysis can clarify the primary and secondary relationships among different factors by analyzing association degree and determining weight coefficients of each evaluation factor, and the classified evaluation for the quality of sandstone reservoir of target interval can be conducted. The grey association theory was used to evaluate the sandstone reservoir on the east part of Wangji oilfield, and the evaluation factors such as effective thickness, porosity, permeability and saturation are selected by weight coefficients method. The result of the method is approximate to the others, which shows the results based on the grey association analysis theory are objective and credible.