超深稠油井解堵技术研究与应用

鲁克沁油田是一个断块状超深稠油油田,油井平均单井日产量5.8 t/d,最高达18 t/d。但在开发过程中,部分新钻水平井产量达不到设计要求,且递减速度快;在注常温清水开发时,部分井投注后,注水压力上升较快,水井欠注严重。对稠油井堵塞机理的分析表明,稠油油水井堵塞主要为有机质堵塞,其次为无机质堵塞。在解除近井筒附近污染时,首先解除有机质堵塞,才可使酸液体系有效进入储层深部。用酸碱复合解堵配方,在油田油水井现场应用12井次,措施有效率100%。其中油井解堵2井次,累计增油约4800 t,平均单井增油5.9 t/d;水井解堵10井次,平均单井视吸水指数增加1.91 m3/d MPa,有效期大于300 d。

Research and Application on the Technology of Relieving Reservoir Plugging from Ultra-Deep Oil Well

Lukeqin oil field was an ultra-deep heavy oil reservoir with block.The average daily output was 5.8 t per well,up to 18 t per well.But in the development process,the output of some new horizontal well couldn't reach the design requirements together with rapid reduced velocity.When water with room temperature was injected in some wells,the water pressure increased rapidly and injection shortage occurred seriously.The main block of thick oil well was organic block and the secondary one was inorganic block bas...