一种新型酸溶性高失水暂堵剂的研制与评价

Development and Evaluation of a New Acid Dissoluble Loss Circulation Material

研制了一种可用于油气储层防漏堵漏的新型高失水酸溶性暂堵剂ＸＡ，其最佳组成为碳酸钙（ＣＣ）８０％～８５％、氧化钙（ＣＬ）５％～１０％、新闻纸（ＮＰ）５％～１０％和皮革纤维（ＬＦ）５％～１０％．这种新型暂堵剂在１５％盐酸中的酸溶率可达９０％以上，用于储层防漏堵漏时，易于酸化解堵，不会伤害油气层．利用ＤＳ—２堵漏仪对ＸＡ各组分与其堵漏性能的关系进行了系统研究，优化了其组成配方，分析和评价了其作为一种高失水酸溶性暂堵剂的性能，并提供了现场使用方法．

A new acid dissoluble loss circulation material XA is developed.Effects of every components of XA on its plugging properties are studied with DS 2 loss circulation material test apparatus.The formula of XA is optimized,and its optimum formula is 80%～85% calcium carbonate,5%～10% calcium oxide,5～10% newsprint and 5%～10% leather fiber.The solubility of the loss circulation material in carbonic acid with 15% concentration is above 90%.Therefore it can be used for leak protection and loss circulation without formation damage.