扶余油田泉四段储层非均质性及对剩余油分布的控制

以岩心分析、测井曲线、动态数据等资料为基础,对扶余油田中区泉四段储层宏观非均质特征及对剩余油分布的影响进行研究。结果表明:研究区储层非均质性严重,层内主要发育泥质、钙质、泥砾3种夹层类型,层间砂体表现为5种垂向连通方式;平面上孔渗参数、非均质系数分布明显受沉积微相及砂体分布的影响,河道主体部分参数值较强,向河道侧翼过渡,参数值具有变小的趋势;隔夹层的不连续分布使储层非均质性愈加严重,同时由于隔夹层的分割,使得整个砂体被分割成相互独立的几个部分,改变了传统的韵律性砂体的剩余油富集模式,且隔层的横向分布范围对剩余油的分布范围也有较大的影响。

Reservoirs heterogeneity and its control on remaining oil distribution of K1q4, Fuyu Oilfield

The reservoirs heterogeneity and its control on the remaining oil distribution of K_1q⁴ in Fuyu Oilfield were researched on the basis of core analysis, physical property, logging curve and dynamic data. The results show that the reservoir heterogeneity is serious. Three types of interlayer of muddy, calcium, muddy gravel are found in the formation, and there are five vertical connection ways in the interlayer sand body. Plane porosity and pore parameters, heterogeneity coefficient distribution are obviously influenced by sedimentary microfacies and sand body distribution. The parameter value of main part of the river is high, the more it near the river channel, the lower the value of parameter is. Interlayer ''s unconnected-distribution makes the reservoir heterogeneity more serious. Because of division of interlayer, the whole sand body is divided into several independent parts and the traditional remaining oil distribution of rhythm sand body changes. At the same time, the lateral distribution of the interlayer controls the range of remaining oil efficiently.