复配交联剂对阳离子聚合物压裂液性能的影响
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摘要
为进一步提高阳离子聚合物压裂液的耐温抗剪切性能,以阳离子聚合物PAAD为稠化剂,采用间苯二酚(FA)、乌洛托品(FB)与有机钛(TCMH)复配物为交联剂配制压裂液,研究了复配交联剂在改善聚合物压裂液耐温抗剪切性能方面的作用效果。结果表明,FA和FB的混合物在高温条件下能与PAAD稠化剂发生交联反应,提高交联体系的稳定性;PADD压裂液的性能与FA、FB的配比和加量有关,FA与FB的质量比为1∶2、加量为0.15%~0.3%的压裂液具有较好的耐温抗剪切性能;与单独使用TCMH有机钛交联剂的PAAD压裂液相比,采用TCMH-FA-FB复配交联剂配制的PADD压裂液具有更好的耐温抗剪切性能;组成为0.6%PAAD+1.0%TCMH+0.3%FA-FB(FA∶FB=1∶2)、p H=3~4的压裂液经160℃、170 s-1连续剪切90 min后的黏度仍保持在60 m Pa·s左右,满足160℃高温油气井压裂施工需要。
In order to further improve the temperature and shear resistance of cationic polymer fracturing fluid,a kind of fracturing fluid which used cationic polymer PAAD as thickening agent and the compound of resorcinol(FA),hexamethylenetetramine(FB)and organic titanium TCMH as cross-linker was prepared. The effect of compound cross linker on the performance of temperature and shear resistance was investigated. The results showed that the cross linking reaction occurred between thickening agent PAAD and the compound of FA and FB at high temperature,which improved the stability of cross-linking structure. The performance of cationic polymer fracturing fluid was related to the mass ratio and concentration of FA and FB. The fracturing fluid had a quite good performance on temperature and shear resistance when the mass ratio of FA and FB was 1∶2 and the dosage of FA and FB was0.15% —0.3%. The PADD fracturing fluid which cross-linked by TCMH-FA-FB had better performance on temperature and shear resistance compared with that of PAAD fracturing fluid which cross-linked by TCMH without FA-FB. The viscosity of PADD fracturing fluid(p H=3—4)that contained 0.6% PAAD,1.0% TCMH and 0.3% FA-FB(FA∶FB=1∶2)remained 60 m Pa·s after continuous shearing for 90 minutes at 160℃ and 170 s-1,which could meet the requirement of fracturing construction in oil and gas wells at 160℃.
In order to further improve the temperature and shear resistance of cationic polymer fracturing fluid,a kind of fracturing fluid which used cationic polymer PAAD as thickening agent and the compound of resorcinol(FA),hexamethylenetetramine(FB)and organic titanium TCMH as cross-linker was prepared. The effect of compound cross linker on the performance of temperature and shear resistance was investigated. The results showed that the cross linking reaction occurred between thickening agent PAAD and the compound of FA and FB at high temperature,which improved the stability of cross-linking structure. The performance of cationic polymer fracturing fluid was related to the mass ratio and concentration of FA and FB. The fracturing fluid had a quite good performance on temperature and shear resistance when the mass ratio of FA and FB was 1∶2 and the dosage of FA and FB was0.15% —0.3%. The PADD fracturing fluid which cross-linked by TCMH-FA-FB had better performance on temperature and shear resistance compared with that of PAAD fracturing fluid which cross-linked by TCMH without FA-FB. The viscosity of PADD fracturing fluid(p H=3—4)that contained 0.6% PAAD,1.0% TCMH and 0.3% FA-FB(FA∶FB=1∶2)remained 60 m Pa·s after continuous shearing for 90 minutes at 160℃ and 170 s-1,which could meet the requirement of fracturing construction in oil and gas wells at 160℃.
引文
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[11]柳慧,侯吉瑞,王宝峰.水基压裂液稠化剂的国内研究现状及展望[J].广州化工,2012,40(13):49-51.
[12]纪凤勇,张煜,张兴华.PAC阳离子聚合物压裂液体系的研究[J].精细石油化工进展,2004,5(8):26-28.
[13]李志臻,杨旭,涂莹红,等.一种聚合物压裂液稠化剂的性能研究及应用[J].钻井液与完井液,2015,32(5):78-82.
[14]罗辉,蕾蓓,石孟可,等.耐高温阳离子聚合物压裂液的制备与性能研究[J].油田化学,2017,34(2):255-258.
[2]王超,欧阳坚,薛俊杰,等.合成聚合物XJJ-4耐高温压裂液室内研究[J].油田化学,2015,32(3):332-335.
[3]胡科先,王晓华.压裂液技术发展现状研究[J].石油化工应用,2015,34(2):13-16.
[4]AHMAD B,DALY W H.Poly(oxyalkylene)grafts to guar gum with applications in hydraulic fracturing fluids[J].Polym Adv Technol,2010,17(9/10):679-681.
[5]庄照锋,赵贤,李荆,等.HPG压裂液水不溶物和残渣来源分析[J].油田化学,2009,26(2):139-141.
[6]付美龙.油田应用化学[M].武汉:武汉大学出版社,2005:119-136.
[7]MCCOMICK C L,JOHNSON C B.Structurally tailored and macromolecules for mobility control in enhanced oil recovery[C].//Stahl G A,Schulz D N.Water-soluble polymers for petroleum recovery.New York:Plenum Press,1988:161-180.
[8]张汝生,卢拥军,舒玉华,等.一种新型低伤害合成聚合物冻胶压裂液体系[J].油田化学,2005,22(1):44-47.
[9]郭建春,王世彬,伍林.超高温改性瓜胶压裂液性能研究与应用[J].油田化学,2011,28(2):201-205.
[10]侯晓辉,王煦,王玉斌.水基压裂液聚合物增稠剂的应用状况及展望[J].西南石油大学学报(自然科学版),2004,26(5):60-64.
[11]柳慧,侯吉瑞,王宝峰.水基压裂液稠化剂的国内研究现状及展望[J].广州化工,2012,40(13):49-51.
[12]纪凤勇,张煜,张兴华.PAC阳离子聚合物压裂液体系的研究[J].精细石油化工进展,2004,5(8):26-28.
[13]李志臻,杨旭,涂莹红,等.一种聚合物压裂液稠化剂的性能研究及应用[J].钻井液与完井液,2015,32(5):78-82.
[14]罗辉,蕾蓓,石孟可,等.耐高温阳离子聚合物压裂液的制备与性能研究[J].油田化学,2017,34(2):255-258.