熵权非均质综合指数算法及其应用

利用熵权方法可以计算非均质综合指数 ,其方法包括确定对象的集合、指标因素的集合、指标矩阵、归一化指标值、指标权重以及计算综合指数等。熵权非均质综合指数算法可将数值有差异的属性参数对非均质指数的贡献进行弱化和强化 ,即去同存异 ;熵权非均质指数的大小能定量表征储层的非均质性。利用该方法在胜坨油田坨2 1断块进行了应用 ,定量地刻划了储层的层间、层内和平面非均质性 ,取得了满意的效果

An algorithm of heterogeneous synthetic index with entropy weight

The entropy weight method can be used to calculate the heterogeneous synthetic index. This algorithm has six contents including determination steps of object gathering, index gathering and index matrix, normalization of index value, determination of index weight, calculation of synthetic index. The index algorithm with entropy weight method can make the contribution of attributive parameters to heterogeneous index weakened or strengthened, namely eliminating sameness and retaining difference. The obtained value of heterogeneous index with entropy weight method can quantitatively reflect the heterogeneity of reservoir. This method has been widely used to characterize quantitatively the heterogeneities of interlayer, internal and plane in reservoirs of the Tuo-21 fault block in Shengtuo Oilfield.