某铀矿床酸法地浸现场试验及化学堵塞成因分析

对我国某铀矿床进行了酸法地浸现场试验研究,在地浸过程中出现了化学堵塞、钻孔抽注液量显著降低的现象.根据铀、钙、铁、铝的浸出曲线,分析了造成该矿床化学堵塞的成因,并通过化学洗孔试验进行了验证.结果表明,铀、铁、铝形成暂时性堵塞,而钙形成永久性堵塞.

Development of City Transport System and Two-wheel Vehicles

Based on the study on the city transport systems of some typical cities worldwide,this paper put forward that each city transport system has its own development mode,which is influenced by the city development plan,economic development level,traveling vehicle composition etc..When some problems occur,such as the congestions caused by contradiction between the road capacity and vehicle composition,the city transport system may come into temporary maturity period.If the improvement for road system is limited meanwhile,optimized structure of vehicle composition should be an effective solution in this case.With the development of economy-internationalization,the development speed of city transport modernization is rapid.When traveling easiness is conflicting with efficiency,the advantages of public transport system become more obvious.Correspondingly,the superiority of two-wheel vehicles will reappear.Though the important function of two-wheel vehicles for alleviating city traffic problems is obvious,however,their development strategy must be reasonably proposed,and operation regulations must be performed accordingly.

就地稠化酸转向系统在注水井中的应用

注水井的储层伤害削弱了注入流体(水)在地层中维持油层压力和生产井油波及效率的流动能力。因此,通常使用酸来消除这些伤害和提高注入井的注入能力。本文介绍了在利比亚的一口注水井中使用就地稠化酸转向系统在整个井段消除地层伤害和提高渗透率的成功事例。注水井中42ft层段内有27ft遭受高表皮伤害,其余16ft承担所有的注入水量。在伤害区的处理目标是消除伤害和改善渗透性。使用就地稠化酸临时封堵高渗透带,使用常规酸在伤害带产生小孔。在就地稠化酸的现场应用之前首先进行实验室实验。聚合物在pH值为2时被交联,此时黏度突然上升到约1000mPa.s。文章就设计、质量控制和结论进行了详述。