乳液减阻剂的研制及应用

Development and Application of a New Type of Salt-tolerant Emulsion Drag Reducer

周忠亚 刘炜 张峰

ZHOU Zhongya LIU Wei ZHANG Feng

中国石油化工股份有限公司江汉油田分公司石油工程技术研究院，湖北武汉　430035

Petroleum Engineering Technology Research Institute, Jianghan Oilfield Branch of SINOPEC, Wuhan Hubei 430035, China

针对常规乳液减阻剂耐盐性能差，采用丙烯酰胺为原料，引入耐盐单体，通过聚合反应合成了一种耐盐乳液减阻剂。研究表明：在0.05-0.3%的加量下其水溶液黏度为3.6～20.7mPa·s，且在0.15%加量时减阻效果最佳，减阻率达72.6%，满足采出水重复利用配制压裂液要求，耐盐和减阻性能均优于常规产品。在川东南BM区块现场应用4井次，采出水重复利用率100%，现场实测减阻率73.2%～76.7%，与传统粉剂减阻剂配液施工模式相比，无需提前配液，无需混配车，大幅度降低配液劳动强度，配液费降低70%以上，施工时效提高20%，对压裂施工意义重大。

In view of the poor salt resistance of conventional drag reducing agent, a salt-tolerant drag reducing agent was synthesized by polymerization using acrylamide as raw material and introducing salt-tolerant monomer. Research has shown that the viscosity of the aqueous solution is 3.6~20.7 mPa·s at the addition of 0.05%~0.3%, and the drag reduction effect is the best at the addition of 0.15%, with the drag reduction rate of 72.6%,and the drag reduction effect is the best at the addition of 0.15%, with the drag reduction rate of 72.6%, which meets the requirements of reusing produced water to prepare fracturing fluid, and its salt tolerance and drag reduction performance are superior to conventional products. It has been applied in 4 wells on site in BM block of the southeast Sichuan. The reuse rate of produced water is 100%, and the field measured drag reduction rate is 73.2%~76.7%.Compared with the traditional powder drag reducing agent liquid preparation mode, it does not need to prepare the liquid in advance or mixing vehicles, which greatly reduces the labor intensity of liquid preparation, reduces the cost of liquid preparation by more than 70%, and improves the construction efficiency by 20%, which is of great significance to the fracturing operation.

中国石化股份公司重大攻关项目“涪陵页岩气田提高采收率技术研究”（P22183）。

https://doi.org/10.3969/j.issn.1008-2336.2023.03.037