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阿北安山岩裂缝油藏注水开发以后,由于裂缝窜流而使油田综合含水上升快,产量下降严重。为了更好地控水稳油,提高开发效果,在注水井调剖措施无明显效果后,首次在高含水井组中实施结合化学调剖的周期注水──在注水初期进行注水井调剖,控制水窜,以更好地恢复压力。在周期注水的注水周期和激动量的确定上,采用了渗流力学理论和矿场动态资料相结合的方法,使得周期注水的注水期和停注期更为合理、科学。实施后,很好地改善了油藏的水驱状况,减缓了油藏产量递减速度。使得平均单井累积增油0.41×104t,油田年递减率下降9.02%,计算新增可采储量33.09×104t。
After the water injection fracturing in North Anhuan rock fractured reservoir was developed, the comprehensive water cut of oilfield rose rapidly due to the channeling of cracks, and the output dropped seriously. In order to control water and stabilize oil well and improve development effect, after the profile control measures of water injection wells have no obvious effect, the cycle water injection combined with chemical profile control is firstly implemented in high-water well group- profile injection well at the initial stage of water injection, Control water channeling to better restore pressure. In the cycle of water injection cycle and the determination of the amount of excitement, using the combination of seepage mechanics theory and mine dynamic data, the cycle of water injection and stoppage period is more reasonable and scientific. After implementation, the waterflooding status of the reservoir is well improved and the rate of decrease of oil production is slowed down. Making the average single-well oil accumulation 0.41 × 104t, annual decline rate of oilfield decreased 9.02%, calculated recoverable reserves 33.09 × 104t.