超声波辅助强氧化剂解除凝胶堵塞实验研究
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摘要
研究了超声波辅助强氧化剂对Cr~(3+)/HPAM凝胶体系解堵降粘的效果及机理。结果表明,超声波处理后,凝胶的降粘率可达99.95%,与强氧化剂单独降解相比,凝胶的交联节点更为疏松,空间层状密集结构受到了更严重的破坏,且Cr(Ⅲ)低聚物单体与聚丙烯酰胺单体显著增多,聚集体明显减少。模拟驱替实验中,超声波辅助强氧化剂解除凝胶堵塞作用明显,渗透率恢复率达到38.9%,超声波与强氧化剂间的协同作用对凝胶降解促进明显,具有实用性意义。
The effect and mechanism of ultrasonic-assisted strong oxidant on Cr~(3+)/polyacrylamide gel system was investigated. The results show that the viscosity reduction rate of the gel is 99. 95% under the action of ultrasonic wave. Compared with the single degradation of the oxidant,the crosslinking node of the gel is more loose and the space stratified structure is more severely damaged and Cr( III) oligomer monomer and polyacrylamide monomer increased significantly,aggregates were significantly reduced. In the dynamic simulation experiment,the effect of ultrasonic-assisted strong oxidants on removing polymer gel plug was significant,and the recovery rate of permeability reached 38. 9%. It is shown that ultrasonic-assisted strong oxidants to remove gel plug is feasible,and the synergistic effect of ultrasound and strong oxidants promotes the degradation of gel.
The effect and mechanism of ultrasonic-assisted strong oxidant on Cr~(3+)/polyacrylamide gel system was investigated. The results show that the viscosity reduction rate of the gel is 99. 95% under the action of ultrasonic wave. Compared with the single degradation of the oxidant,the crosslinking node of the gel is more loose and the space stratified structure is more severely damaged and Cr( III) oligomer monomer and polyacrylamide monomer increased significantly,aggregates were significantly reduced. In the dynamic simulation experiment,the effect of ultrasonic-assisted strong oxidants on removing polymer gel plug was significant,and the recovery rate of permeability reached 38. 9%. It is shown that ultrasonic-assisted strong oxidants to remove gel plug is feasible,and the synergistic effect of ultrasound and strong oxidants promotes the degradation of gel.
引文
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[2]曹正权,冷强,张岩,等.清除聚合物堵塞的解堵剂DOC-8的研制[J].油田化学,2006(1):77-80.
[3]张永发,祝济之,胡长华.超声波地层解堵机理研究初步[J].北京理工大学学报,2006,26(5):397-400.
[4]孙仁远,沈本善,罗荣章.超声波对多孔介质中两相流动的影响[J].应用声学,1998,17(3):40-42.
[5]孙仁远,王连保,彭秀君,等.稠油超声波降粘试验研究[J].油气田地面工程,2001,20(5):22-23.
[6]梁成浩,白忻平.超声波阻垢性能的研究[J].中国给水排水,2003,19(13):64-66.
[7]Champion B,Bas FVD,Nitters G.The application of highpower sound waves for wellbore cleaning[J].Spe Production&Facilities,2004,19(19):113-121.
[8]Bakker T W,Vladimir I.Cavitator for effective well cleaning[J].SPE 75352,2002.
[9]Hamida T.The influence of ultrasonic energy on capillary fluid displacement[J].SPE 106521,2006.
[10]Aarts A C T,Gijs O,Bil K J,et al.Enhancement of liquid flow through a porous medium by ultrasonic radiation[J].SPE Journal,1998,4(4):321-327.
[11]孙斐斐,林梅钦,王玉功,等.聚丙烯酰胺-Cr3+凝胶的结构与性能关系[J].石油学报:石油加工,2014(6):1065-1071.
[12]林梅钦,韩飞雪,李明远,等.核微孔滤膜评价交联聚合物溶液封堵性质的研究[J].膜科学与技术,2003(2):11-14.
[13]Wang,Wang G X,Chen Z H.Rate equation of gelation of chromium(Ⅲ)-polyacrylamide sol[J].Chinese Journal of Chemistry,1995,13(2):97-104.
[14]Laswick J A,Plane R A.Hydrolytic polymerization in boiled chromic solutions1[J].Journal of the American Chemical Society,1959,81(14):3564-3567.
[15]段洪东.部分水解聚丙烯酰胺/Cr(Ⅲ)凝胶的交联机理及交联动力学研究[D].杭州:浙江大学,2002.
[16]许洪星.超声波协同催化剂低温裂解超稠油机理研究[D].青岛:中国石油大学(华东),2013.