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低渗透注水开发油田在开发过程中注水井吸水能力不高,开发过程中注水压力、启动压力不低,并且在不断注水的过程中,矛盾仍然会加剧,甚至注不进去水的情况也时有发生。以往研究表明,油田注水井吸水能力不高、或者不断下降,除了和孔隙结构、油层渗透率等内在原因有关外,还和注采井井距大、油层伤害有关系。注入水的水质不合格或者作业压井液不配伍,都会堵塞、污染油层,降低油层吸水量和注水量。本文研究的关键就是何为造成油层伤害的原因,应该如何采取措施解决油层吸水能力差的问题,提高油井注水能力。
Low permeability waterflooding oilfield in the development process of water injection well water absorption capacity is not high, the process of water injection pressure, start pressure is not low, and in the process of continuous water injection, the conflict will aggravate, even note not into the water situation sometimes occur. Previous studies have shown that the water injection wells in oilfields have low water absorption capacity or are continuously declining. In addition to the intrinsic causes of pore structure and reservoir permeability, they are also related to the large well spacing and oil layer damage. The quality of water injected into the water or operating fluid incompatible, will be blocked, polluting the reservoir, reducing the amount of water absorption and water injection. The key point of this paper is what causes the formation damage and how to take measures to solve the problem of poor water absorption capacity of the reservoir and improve the water injection ability of the well.