摘要
注水水质是影响注水效果的重要因素,当注入不合格的注入水时,岩石渗透率下降,且下降程度与渗透率大小有关。注入不合格的注入水对低渗透层的伤害程度严重,且对纵向非均质性产生更加严重的影响,使纵向渗透率变异系数增大,最终影响到水驱采收率。试验结果表明,当注入不合格的水引起地层损害后,地层平均渗透率降低,而地层渗透率是影响采收率的重要因素,渗透率越小,采收率越低。
The quality of injected water was a key factor influencing waterflood effectiveness.When unqualified water was injected,permeability decrease was induced,its decrease level was related with permeability.Unqualified injection water would cause severe formation damage,induce more severe influence on vertical heterogeneity,and vertical permeability increase,eventually the oil recovery rate of waterflooding was influenced.Experimental result shows that when the formation damage is induced by unqualified water,its average permeability was reduced,while permeability is the key factor influencing recovery rate,the lower the permeability is,the small the recovery rate is.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2008年第5期149-151,共3页
Journal of Oil and Gas Technology
关键词
油田开发
注入水水质
地层伤害
变异系数
采收率
oilfield development
injected water quality
formation damage
coefficient of variation
recovery
