滑溜水减阻剂实验室评价及现场应用

Laboratory Evaluation and Field Application of Friction Reducer in Slick Water

减阻剂实验室评价常用指标主要有减阻能力评价、配伍性评价及地层伤害评价等。其中,减阻能力是评价滑溜水最为重要的技术指标,准确估算压裂摩阻,对施工排量的设计十分关键;配伍性评价,通常首先采用环路摩阻测试评价不同基液下的减阻能力,然后使用流变仪对添加不同添加剂的滑溜水流变性能进行测试;地层伤害一般通过测定伤害前后渗透率的变化来确定。目前典型的现场应用有4种情况,不同的施工环境、施工要求对减阻剂的要求均不同。

The indicators commonly used in laboratory to evaluate friction reducers include drag reduction capability,compatibility,and formation damage. Among them,the drag reduction capability is the most vital technical index for evaluating slick water. Accurate estimation of fracturing friction is critical to the design of construction displacement. As for compatibility,the loop friction test is firstly used to evaluate friction reduction of different base fluids,and then the rheometer is used to test the rheological properties of slick water with different additives. Formation damage is generally determined by measuring the change in permeability before and after the experiment. At present,there are 4 typical field applications,and different construction environment requires different friction reducers.