胡12块水驱油藏储层动用状况变化分析

Variation on Sweepout of Water Drive Reservoir in Block Hu 12

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 。

On the basis of data analysis and monitoring, variations and causes of reservoir production both before and after water injection are discussed from 3 aspects of horizontal, interlayer and reservoir properties The variations of production in a water driving reservoir are summarized, that is, a quick advancement of water line goes up vertically along a high permeability layer, tonguing goes horizontally along a high permeability zone, waterout is serious in water channel with high level of washing and less remaining oil, waterout is weak or no waterout occurs on both sides of the channel with low level of washing and more remaining oil After water driving, the reservoir heterogeneity and water wettability of the reservoir rock enhances