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低渗透油田注水实际开发时,出现了这样的情况:缺乏较强的注水井吸水能力、启动压力与注水压力高,并在注水时间的进一步延长下,出现了严重的问题,甚至会发生注不进水的情况。致使注水井吸水能力降低的原因除了和孔隙结构、油层渗透等因素有关外,同时,注采井井距大、油层伤害也会对其造成影响。如果注入水不具备达标的水质或者作业压井液不配伍,将会引起堵塞现象,进而对油层造成污染,致使油层吸水量与注水量不断减少。笔者根据自身工作经验,首先对油田储层吸水能力进行了分析研究,其次,提出了改善油田储层吸水能力的具体措施。
The actual development of waterflooding in low permeability oilfields has led to the situation that there is a lack of strong water absorption capacity in water injection wells, high starting pressure and high water injection pressure, serious problems with further waterflooding times, The situation of water. In addition to factors such as pore structure and reservoir infiltration, the reason for the decrease in water absorption capacity of injection wells is also related to the large well spacing between injection and production wells and the oil layer damage. If the injection of water does not meet the standards of water or operating fluid is not compatible, it will cause clogging phenomenon, and thus cause contamination of the reservoir, resulting in reservoir water absorption and water volume declining. Based on my own working experience, the author first analyzes the water absorption capacity of oil reservoirs, and then puts forward some concrete measures to improve the water absorption capacity of oil reservoirs.