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敏感性评价是研究储层伤害机理、减小储层损害的依据,是油田高效开发的基础。安塞油田属于开发难度较大的低孔特低渗油田,其主力开发层长6油层孔隙度低,渗透性差,非均质性较强。结合该地区的地质特征和储层特征,对安塞油田长6储层进行敏感性室内评价实验,室内评价实验表明:安塞油田长6储层具有中偏强速敏、弱水敏、弱盐敏、中等酸敏和弱~中等碱敏的特征。
Sensitivity evaluation is the basis for studying the mechanism of reservoir damage and reducing reservoir damage, and is the basis for efficient oilfield development. Ansai Oilfield belongs to the low-porosity and ultra-low permeability oilfield with high development difficulty. Its main developmental reservoir is Chang 6 oil reservoir with low porosity, poor permeability and strong heterogeneity. Based on the geological characteristics and reservoir characteristics in this area, a sensitivity indoor evaluation experiment was carried out on Chang 6 reservoir of Ansai Oilfield. The indoor evaluation experiments show that Chang 6 reservoir of Ansai Oilfield has mid-partial strong velocity weakness, weak water sensitivity and weakness Salt sensitivity, moderate acid sensitivity and weak ~ moderate alkali-sensitive features.