鄂尔多斯盆地子长地区长2段储层非均质性研究

Study on Heterogeneity of Chang 2 Reservoir in Zichang Area,Ordos Basin

为了进一步指导油藏开发,分别从宏观及微观角度对鄂尔多斯盆地子长地区的储层非均质特征展开研究。研究结果表明:首先,研究区长2段储层的渗透率在纵向剖面上以正韵律为主,表现为中等—较强层间非均质性;其次,储层砂体及物性的平面展布特征受沉积相的影响而呈条带状分布,表现出较强平面非均质性;同时,孔渗相关性较低,孔喉类型多而且分选系数大,整体上非均质性较强。

In order to further guide reservoir development,the reservoir heterogeneity characteristics of Zichang area in Ordos Basin are studied from the macro and micro perspectives.The results show that the permeability of Chang 2 reservoir is dominated by positive rhythm in the longitudinal section,with moderate-strong heterogeneity between layers;the plane distribution characteristics of reservoir sand bodies and physical properties are affected by sedimentary facies and are distributed in strips,which can be determined as strong plane heterogeneity.The porosity-permeability correlation is low,there are many types of pore throats and the sorting coefficient is large,and the overall heterogeneity of Chang 2 reservoir is strong.