东濮凹陷卫城油田卫2块沙三下亚段储层非均质性及对剩余油分布的影响

针对东濮凹陷卫城油田卫2块储层构造复杂且非均质性程度高的特点,利用岩心常规物性测试、薄片鉴定等技术,结合动态数据和测井参数解释资料,对储层非均质性及其对剩余油分布的影响进行了研究,探究有利的挖潜区块。结果表明:研究区储层层内非均质性严重,层间非均质性中等,平面非均质性较为复杂,其分布与沉积微相展布特征有很好的对应关系,水下分流河道主体部位非均质弱,向河道侧翼过渡非均质性有变强的趋势。正韵律水下分流河道砂体的顶部剩余油富集,反韵律河口沙坝主体砂体的顶部及其侧缘砂体的中下部剩余油相对集中,为研究区剩余油挖潜提供了依据。

Heterogeneity and its impact on remaining oil distribution of Es3 in Wei2 Block, Weicheng Oil Field, Dongpu Depression

According to the characteristics of complicated structure and serious heterogeneity of Es3 in Wei2 Block in Weicheng Oil Field of Dongpu Depression.The reservoirs heterogeneity and its control on the remaining oil distribution were researched to explore the favorable exploration blocks,on the basis of the rock cores of conventional physical properties test, rock slices identification,combined with dynamic data and interpretation parameters from well logs .The results show that the intralayer heterogeneity is extraordinary serious, the interlayer heterogeneity is moderate,the plane heterogeneity is more complicated and shows well correspondence with distribution of sedimentary microfacies,the principal part of the underwater distributary channel heterogeneity is weak, to make the transition to channel flank heterogeneity has a tendency to stronger. Under its influence, distributary channel of positive rhythmand-based and mouth bar with good physical property of reverse rhythm-based are mainly remaining oil enrichment parts and tapping potential area.