老油田二次开发技术策略及实践

油田二次开发的本质就是老油田在传统的开采技术（包括三次采油）方式下，已经达到极限采收率、已无开采效益时，再次采用新技术、新方法以及新理念，建立油田新的开发体系和模式，实现老油田经济有效地大幅度提高采收率的目的。在广泛调研国内外相关资料基础上，提出了二次开发技术的策略。分别以大庆萨北注水开发油田、河南古城超稠油注蒸汽开发油田为例，分析了不同类型油田二次开发的成功做法以及取得的效果，为不同类型油田开展二次开发提供了技术依据和可借鉴的经验。

TECHNICAL MEASURES FOR SECONDARY RECOVERY IN MATURING FIELDS AND ITS PRACTICE

When oilfields have reached their limiting recovery and had no development effectiveness by using traditional recovery technology(including EOR),some new techniques,methods,and conception were adopted to establish new exploitation system and development mode,and then improve recovery ratio.Based on widely studying the correlative data at home and abroad,the secondary production technology was put forward.Taking the waterflooding oilfield in Daqing Sabei oilfield and the steam driving oilfield in Henan Guche...