论文部分内容阅读
华北油田第三系砂岩油层,由于粘土膨胀使油田注水工作受到很大影响。注水井一般从投注伊始,注水量月递减达50%左右。由于达不到配注指标,加速了油层压力递减,直接影响着油田产油任务的完成。为了解决注水层粘土膨胀问题,首先对防止粘土膨胀的化学药剂进行了搜集与筛选,通过试验研究和分析对比,确认TDC效果较好。截至1985年4月24日,已进行静态下浸泡试样
The Tertiary sandstone reservoir in North China Oilfield has greatly affected the waterflooding work in the oilfield due to the expansion of clay. Injection well generally from the beginning of the betting, water injection volume decreased by about 50%. Due to the failure to reach the target value of injection, the pressure drop of the oil layer is accelerated, which directly affects the completion of oil production tasks. In order to solve the problem of clay swelling in waterflooding layer, chemical agents that prevent the swelling of clay are firstly collected and screened. It is confirmed that TDC works well through experimental research and analysis. As of April 24, 1985, a static soak sample has been performed