Cr^(3+)凝胶在改善弱碱三元复合驱吸液剖面中的应用

Application of Cr^(3+) gel to the improvement of the fluid entry profile of injection wells in weak alkali ASP flooding

基于分析弱碱三元复合驱成垢样机理和现有调剖剂性质特征,提出Cr3+聚合物凝胶改善弱碱三元复合驱注入井吸液剖面技术路线,开展聚合物凝胶配方优选,并在大庆油田北三西块P56井进行调驱矿场试验.试验结果表明,聚合物凝胶具有除垢和封堵高渗透层的双重功能,高渗透层吸液量从调剖前的100%降低为54.9%.

By analyzing scaling mechanism and the property of profile control agent,this paper presents technique for Cr3+ polymer gel of improving fluid entry profile of injection well in weak alkali ASP flooding.The optional formula,property evaluation and compatibility condition with weak alkali ASP flooding of polymer gel are studied and tested in Beisanxi P56 pilot of Daqing oilfield.The results of pilot test shows the polymer gel has double function of scavenge and blanking off high permeability zone.The fluid entry in high permeability layer is decreased from 100% to 54.9%.