安塞油田套损治理工艺技术研究与应用

Research and application of casing damage treatment technology in Ansai oilfield

安塞油田勘探开发近40年,随着开发时间延长,套损加剧,影响产能发挥。为此,分析研究套管腐蚀机理,针对性的开展二次固井水泥体系优选、挤注工艺优化,在产能恢复、提高水泥返高方面效果明显,达到长效治理目的,为其他同类套损治理提供了借鉴和指导。

In recent 40 years of exploration and development in Ansai oilfield,with the extension of development time,the casing damage is aggravating,which affects the production capacity.Therefore,by analyzing and studying the mechanism of casing corrosion,the optimization of secondary cementing cement system and squeeze injection process is carried out.The effect is obvious in productivity recovery and cement return height improvement,and the purpose of long-term treatment is achieved,which provides reference and indicators for other similar casing damage treatment.