论文部分内容阅读
在考察单一氧化剂Ｈ_２Ｏ_２、Ｋ_２Ｓ_２Ｏ_８和氧化剂ＢＨ、ＣＨ对聚合物凝胶破解的基础上，采用了复配氧化剂，利用正交试验法探讨破胶剂的优化组成。评价试验结果表明，６０℃环境温度下优选的破胶剂组成为：０．３５％Ｈ_２Ｏ_２、０．４％Ｋ_２Ｓ_２Ｏ_８、０．５％ＢＮ、０．６％ＣＮ，对粘度为２．３×１０~５ｍＰａ·ｓ的六次甲基四胺交联的聚丙烯酰胺凝胶的破胶效果理想，在ｐＨ＝２时，可使凝胶聚合物的破解效率达９９％以上，破胶后残液粘度低。岩心模拟试验结果表明，使用该破胶剂破胶前，堵水率９８％以上，破胶后渗透率恢复值可达９８％以上。能够有效解除聚丙烯酰胺凝胶的堵塞。
On the basis of examining gel cracking of single oxidant H 2 O 2, K 2 S 2 O 8 and oxidant BH and CH, a complex oxidant was used and the optimum composition of breaker was explored by orthogonal test. The evaluation results show that the optimum composition of breaker at ambient temperature of 60 ℃ is 0.35% H 2 O 2, 0.4% K 2 S 2 O 8, 0.5% BN and 0.6% CN, and the viscosity of 2.3 × 10 ~ 5mPa · s hexamethylenetetramine cross-linked polyacrylamide gel gel breaking effect ideal, at pH = 2, the gel polymer can be cracked efficiency of 99% or more, broken gel residue Low viscosity. The core simulation test results show that before using the breaker gel breaker, the water cut rate of 98% or more, broken gel permeability recovery value of up to 98%. Can effectively lift the plug polyacrylamide gel.