醛冻胶在地层酸化中的应用
Application of Aldehyde Gel in Formation Acidizing
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摘要: 由于醛冻胶的成冻pH值较低(pH值<3),因此可将其用于地层酸化,以解决酸化过程中的缓速与出砂问题。本文讨论了醛冻胶在油井酸化中的使用工艺及作用机理,同时通过室内溶蚀率测定及冲砂试验,评价了其缓速及防砂效果。 结果 表明:醛冻胶具有岩心溶蚀率低,固砂强度高,地层伤害低等优势,能同时达到缓速与防砂的目的。Abstract: Aldehyde gel is applied to acidize formation to solve retarding reaction velocity and sand controlling as a result of its low gelation pH value(pH<3).In this paper,the application technology and effect mechanism of aldehyde gel are discussed and the effec