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在分析监测资料的基础上 ,从平面、层间及储层特征 3个方面分析了水驱前后储层动用状况的变化 ,阐述了引起变化的原因。总结出水驱油藏动用状况变化规律 ,即水线纵向上沿高渗层突进 ,平面上沿高渗带舌进 ;水道水淹严重 ,水洗程度高 ,剩余油少 ;水道两侧水淹较弱或未水淹 ,水洗程度低 ,剩余油多。水驱后储层特征变化主要为 :层内非均质性增强 ,储层岩石亲水性增强
Based on the analysis of monitoring data, the change of reservoir utilization before and after waterflooding is analyzed from the aspects of plane, interlayer and reservoir characteristics, and the reasons for the change are explained. The changing regularity of water flooding reservoir utilization is summarized, that is, the water line protrudes longitudinally along the high permeable layer and goes flat along the infiltration zone. The water flooding is serious, the degree of water washing is high, and the residual oil is less. The water flooding on both sides of the waterway is weak Or not flooded, low degree of washing, the remaining oil and more. The main reservoir characteristics change after waterflooding is that the intra-layer heterogeneity is enhanced and the reservoir rock hydrophilicity is enhanced