酸化作业中储层的伤害与防范

Reservoir Damage and Protection in Acidizing Treatment

酸化作业在使油气田产量提高的同时,也对储层产生了一定程度的损害。酸液与储层岩石及流体不配伍,酸液滤失,有机物覆盖,添加剂使用不当,工艺参数选取不合理,施工时引入杂质,都会造成储层伤害。因此,施工过程中应根据现场实际情况,改进酸液体系,优化施工参数,在充分保证采油效果的同时最大限度地保护储层。

Although the acidification operation for oil and gas field has largely improved the productivity, it also brings about a certain degree of damage for reservoir. Since the acid fluid is incompatible to the reservoir rock and fluid, the acid filtration, organic pollutant coverage, misuse of additive, improper designing parameters and impuri- ty introduced during operation will damage the reservoir. Therefore, the new acid system should be improved and the theory and process must be optimized during operation in order to ensure the production efficiency and protect the reservoir maximally.