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注入水的水质是影响注水效果的重要因素,当注入不合格的水时,岩石渗透率下降,且下降程度与渗透率大小有关。当注入不合格的水对底层渗透伤害程度严重,并且对非均匀性质影响更加严重。使纵向渗透率变异系数增大,最终影响到水驱采收率。通过试验证明,当不合标准的水注入后在损害地层,地层的平均渗透就会降低,随之,地层的渗透又会严重的影响采收效果,渗透率越小,采收率相应的就越低。
Infusion water quality is an important factor affecting the water injection effect, when the injection of unqualified water, rock permeability decreased, and the degree of decline and the size of the permeability. When unqualified water is infiltrated into the ground, the degree of infiltration damage is serious, and the impact on the non-uniform nature is more serious. So that the vertical permeability coefficient of variation increases, eventually affecting the water flooding recovery. The experiment proves that when the substandard water is infused, the average permeability of the strata will decrease when it is damaged, and then the permeability of the strata will seriously affect the recovery effect. The smaller the permeability, the more the recovery rate will be low.