在近井地带由机械因素造成的渗透率降低，如碎片的驱替堵塞射孔孔眼或地层。
The reduction in permeability in the near-wellbore area resulting from mechanical factors such as the displacement of debris that plugs the perforations or formation matrix.
目前，解决上述问题最常用的办法是采用基质酸化解堵，溶蚀近井地带的堵塞物，提高地层渗透率。
Currently, Solve the above problems are most common approach is to use matrix acidizing, Corrosion near wellbore area of blockages, Increased permeability.
较小的潜在土酸用量不能控制副反应的发生，较大的潜在土酸用量可有效提高近井地带的渗透率。
Low potential mud acid dosage can not control to side reaction to occur; high dosage of potential mud acid may in-crease near-well-bore permeability.
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