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华庆地区长9油层组属于低孔、低渗型储层,发育三角洲沉积体系和浅湖沉积,其中主要为三角洲前缘沉积。在岩心资料和测井数据统计的基础上,通过定量计算华庆地区长9储层的渗透率变异系数、突进系数和级差等参数以及统计分层系数、砂岩密度等参数,对储层的层内、层间及平面非均质性进行研究。通过综合分析研究得出,长9储层在纵向上和横向上非均质性都比较强,为中等非均质性储层。
The Chang-9 reservoir in Huaqing area belongs to low-porosity and low-permeability reservoirs, which have developed deltaic sedimentary system and shallow lake sediments, mainly delta front sediments. Based on the core data and well logging data statistics, by quantitatively calculating the parameters such as permeability coefficient, coefficient and coefficient of permeability of Chang 9 reservoir in Huaqing area, and the parameters such as statistical stratification coefficient and sandstone density, Internal, interlaminar and planar heterogeneities were studied. Through comprehensive analysis and research, it is concluded that the Chang 9 reservoir is relatively non-homogeneous in both vertical and horizontal directions, and is a moderately heterogeneous reservoir.