储层非均质性研究及在扇三角洲油田中的应用

Study on reservoir heterogeneity and its application in fan-delta oilfield

综合岩心录井测井等资料开展了杜229区块兴隆台油层的沉积微相及非均质性研究。结合油组内部渗透率变异系数、级差等参数和隔夹层研究,对不同层次的储层非均质性进行了较为详细的研究。研究表明:兴隆台油层储层层间非均质性严重,属不均匀型。兴隆台油层隔夹层可细分为灰绿色、灰色泥岩和灰绿色泥质粉砂岩、粉砂质泥岩,平面上,隔层分布受沉积相带控制呈条带状分布,南厚北薄;纵向上,隔层分布不均一。沉积微相是储层非均质性的主控因素,分流河道和心滩为油田的优势储层相。

In this paper,the study of sedimentary microfacies and heterogeneity of the Xinglongtai oil layer in the Du229block reservoir is carried out by integrating the core,logging and logging data.The reservoir heterogeneity at different levels is also studied in detail with the study of the variation coefficient of internal permeability,the grade difference and the interlayer.The results show that the reservoir heterogeneity of Xinglongtai reservoir is serious and belongs to the heterogeneous.The interlayer of Xinglongtai reservoir can be subdivided into gray-green mudstone,gray mudstone and gray-green muddy siltstone,and silty mudstone.On the plane,the distribution of interlayer is controlled by sedimentary facies,and shows the stripped shape with thick southern area and thin northern area.The distribution layer is not uniform in the vertical direction.Sedimentary microfacies is the main controlling factor of reservoir heterogeneity,and the distributary channel and core beach are the dominant reservoir facies.