氯化钾在煤层气井压裂中的作用

The action of chlorinated potassium in CBM well fracturing operation

在油田以压裂作为增产措施中 ,KCl主要作为粘土稳定剂加入压裂液中。通过实验发现 ,在煤层气井压裂液中加入 KCl不仅可作防止煤粉膨胀的稳定剂 ,还能改变煤基质对水溶液的吸附润湿特性 ,从而提高返排效率 ,减少对煤储层的伤害。

In fracturing operation in oil field,KCl serves as main clay stabilizer mixed in fracturing fluid.The experiment indicated,that KCl mixed in CBM well fracturing fluid plays not only as antisweling agent,but it can also change adsorption properties and water wetability of coal matrix,resulted in increasing back-discharge rate of reservoir and decreasing reservoir damage.