摘要
针对双河油田因水锁造成的减产问题,开展了水锁减产的机理研究。应用热力学和动力学理论分析了引起水锁效应的原因;从渗透率、油藏压力、岩石矿物性质、驱替压力以及外来流体粘度等方面分析了影响水锁效应的内在和外在因素。岩心水锁伤害实验结果表明:渗透率越低,油藏压力和驱替压力越小,产生的水锁伤害越严重。提出了预防和解除水锁伤害的方法,现场试验8井次,有效率100%,取得了显著效果。
In the case of the decline of production caused by water blockage in Shuanghe Oilfield, the mechanism research was carried out. The cause of water - lock effect was analyzed by the theory of thermodynamics and dynamics. The internal and external factors of the water - blocking effect were analyzed from permeability, reservoir pressure, lithological characters, displacement pressure and external fluid viscosity. The experimental results of water locking damage indicated that the lower the permeability is, the smaller the reservoir pressure and the displacement pressure are, and the more seri- ous the water lock damage will be. The method for water locking damage prevention and removal was put forward and tested in 8 wells. The effective rate was 100% , and significant result has been achieved.
出处
《复杂油气藏》
2012年第2期67-70,共4页
Complex Hydrocarbon Reservoirs
基金
中国石化河南油田分公司委托项目(G00501-10-2S-0040)
关键词
双河油田
水锁效应
渗透率
驱替压力
Shuanghe Oilfield
waterlock effect
permeability
displacement pressure
