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Development of acid-soluble completion fluid of strong inhibition ASS-1 and its application
Author(s): 
Pages: 17-20
Year: Issue:  6
Journal: DRILLING FLUID & COMPLETION FLUID

Keyword:  钻井液完井液流变性润滑性酸溶率水平井伤害评价;
Abstract: 长庆气田上古生界气藏属低压低渗储层.苏平1井、苏平2井水平段采用下筛管完井,酸洗投产,要求完井液性能不仅要满足长裸眼小井眼水平井段钻进的施工要求,还必须对产层伤害小,而且在产层表面所形成的泥饼易被酸溶掉.因此,选择强抑制酸溶聚合物完井液ASS-1体系,进行改进、评价,使之用于这2口井的水平井段钻进.结果表明,ASS-1体系主要特点为:密度低,滤失量低,性能稳定;流变性好,动塑比为0.3~0.5 Pa/mPa·s;钻井液润滑性好.室内分析现场取样,钻井液滤饼酸溶率超过80%;对同井直井段储层岩心进行伤害,经酸洗后岩心渗透率恢复率大于75%.
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