精细水质处理技术在低渗透油田开发中的应用

Application of fine treatment technique of water quality to the development of low permeability oilfield

开发低渗透油田,注水水质及水井的吸水能力是保持地层压力、提高油井产能的关键因素。近年来,立足于水质改善工作,通过室内研究制定断块注水指标,重点实施了污水处理系统的升级改造工程及先进水质精细工艺,实现了从污水处理站—高压注水站的全程水质过滤,达到三级以上精细处理能力。明显改善了低渗透油藏的注水开发状况。

The quality of injected water and the waterintake capacity of water injection wells are the key factors in balancing formation pressure and enhancing the productivity of the oil wells during the development of lowpermeability oilfield. In recent years, based on the efforts of improving the water quality and designing the index of fault block water flooding in laboratory, the waste water treatment system is updated and the advanced fine treatment technology of water quality is applied on emphasis. Therefore, a fullprocess filtration of water quality from sewage treatment station to highpressure water injection station is realized, which has the fine treatment ability above Grade 3. Satisfied development effects and economic profits are gained with obviously improvement of waterflood development situation in lowpermeability oilfield.