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渐新统下干柴沟组下段(E31)为跃进二号油田主要含油层系,在岩心资料和测井数据统计的基础上,计算跃进二号油田E31储层层间、各小层层内的渗透率变异系数、突进系数、级差,运用单项非均质参数及储层非均质综合指数评价了E31储层层间、各小层(以Ⅰ-11小层为例)层内及平面的非均质性。研究表明,跃进二号油田E31储层层间非均质性强,平面上强非均质性区域分布广;Ⅰ-11小层层内非均质性中等,强非均质性区域主要在8-4、3-3、8-7、7-11等井附近。
The lower section of the Oligocene Ganchaigou Formation (E31) is the major oil-bearing layer of the Yuejin No.2 oilfield. Based on the core data and logging data statistics, the E31 reservoir in the Yuejin No.2 oilfield is calculated, The coefficient of variation of permeability, the coefficient of sudden change and the grade difference were used to evaluate the inter-layer and plane-layer of the E31 reservoir layers and the small layers (taking the I-11 sublayer as an example) by using the single heterogeneity parameter and the reservoir heterogeneity comprehensive index Heterogeneity. The study shows that the E31 reservoir of Yuejin No.2 oil field is characterized by strong inter-layer heterogeneity and a wide distribution of strong heterogeneity in the plane. The heterogeneity of medium and strong heterogeneity in the layer I-11 is mainly at 8-4,3-3,8-7,7-11 and other wells nearby.