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低渗透强非均质砂砾岩油藏初期生产特征变化明显,具有平面、纵向差异大的特点。以克拉玛依油田五3中区克下组油藏为例,在分析该类油藏初期生产特点及初期产能分布特征的基础上,结合沉积储层精细刻画成果,研究了影响低渗透砂砾岩油藏初期产能的地质因素。结果表明,该类油藏初期产能的主要影响因素是沉积微相,其中主槽和辫流线是有利的高产能微相,槽滩、砂岛及漫洪带等微相初期产能较低。应用沉积微相内部细分流动单元的方法,进一步对比分析表明,同一沉积微相内初期产能受流动单元控制,总体来说Ⅰ类流动单元初期产能最高,Ⅱ类中等,Ⅲ类较差,Ⅳ类最差。
Low permeability strong heterogeneous conglomerate reservoir characteristics of early production changes significantly, with large differences in plane and longitudinal characteristics. Based on the analysis of the initial production characteristics and initial productivity distribution of this type of reservoir in Kejiamayi oilfield, Kejiamayi oilfield, and the detailed characterization of sedimentary reservoirs, the effects of low permeability gravel reservoir Geological factors of initial production capacity. The results show that the main influencing factors of the initial production capacity of these reservoirs are sedimentary microfacies, in which the main channel and the braided streamline are favorable high-productivity microfacies. The initial productivity of microfacies such as sand beach, sand island and flood flood zone is low. Using the method of subdividing the flow cell in the sedimentary microfacies, further comparative analysis shows that the initial productivity of the same sedimentary microfacies is controlled by the flow cell. Generally speaking, the flow capacity of the flow cell of type Ⅰ is the highest in the initial stage, The worst class.