西北大学学报(自然科学版)

通过真实砂岩微观孔隙模型实验 ,研究了安塞、五号桩、鄯善、科尔康 4个低渗透油田的微观水驱油特征。结果表明 :1贾敏效应是不可忽视的作用力 ;2水驱油效率低 ;3自吸驱油现象明显 ;4油层结垢损害应当预防。将 4个低渗透油田划分为成岩型和沉积型两种类型 ,该成果对改善低渗油层注水开发有一定理论意义

The characteristics of low permeability formation with water flooing for Ansai, Wuhaozhuang,Shanshan and Kerkang oilfields were analyzed using sandstone micromodel displacement experiment.They are:1.obvious influence of Jamin effect on low permeability reservoirs, 2.low oil displacement efficiency, 3.no ignorable spontaneous imbibition phenomena and 4. apparent formation damage of scaling.The micromodel is made directly from natural sandstone.In additon, The fields mentioned above were divided into low permeability fields of diagenetic origin and low permeability fields of sedimentary origin.