化学暂堵酸化技术在TZ16-10水平井的应用及效果分析

Application of Chemical Temporary Block Aciding Technology in TZ16-10 Horizontal Well and Its Effect Analysis

以往塔里木油田水平井酸化皆是按笼统酸化工艺技术进行的,而笼统酸化施工中酸液遵循阻力最小原则,酸液大量渗入孔渗相对好的层段,只有少量进入渗透率较低的层段,形成指进,不能有效清除中低渗透层伤害,反而进一步加大了层间渗透率差异。鉴于此,开展了化学暂堵转向酸化技术研究。对其工艺原理、化学暂堵剂的优选,以及在TZ16-10水平井现场应用等方面进行分析总结,为化学暂堵酸化技术在水平井中的下一步应用提供了技术支撑。

General aciding tech is always used in horizontal well in Tarim oilfield formerly.while,following the principle of resistance being least during conduction of its operation,a little of acid liquid goes into layer in which permeability is lower to form fingering that can not effectively remove damage in middle-low permeable layers,on the contrary,add permeability difference between layers.In the view of this,technical research from chemical temporary block aciding to aciding is conducted and optimum seeking chemical transient shutoff agent,and field application in TZ16-10 horizontal well are analyzed which supplies a tech support for the next application of chemical transient shutoff aciding technology in horizontal well.