摘要
为获得性能优良的压裂液稠化剂,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、苯乙烯(St)和丙烯酸(AA)为单体,采用水溶液聚合法制备出了AM/AMPS/St/AA四元共聚物TKF,优化了聚合反应条件,并采用红外光谱表征了TKF的结构。研究了以稠化剂TKF为主剂的压裂液的成胶性能、耐温抗盐性能、抗剪切性能和破胶性能。结果表明:在如下条件下合成的TKF具有良好的性能:St加量为AM质量的9%,AMPS、AM质量比为3:7,AA加量为AM质量的1.60%,引发剂加量(相对于单体总量)0.24%,反应温度45℃,反应时间4h,p H值8。以稠化剂TKF为主剂的压裂液的成胶性、耐温耐盐性能及抗剪切性能优良。在质量分数3%的溶液中用0.3%六次甲基四胺交联后,所得压裂液冻胶黏度可达211 m Pa·s;耐温能力达150℃左右;在压裂液冻胶中加入10 g/L的CaCl_2后黏度仍为100 m Pa·s;在温度140℃、剪切速率170 s-1下剪切120 min后的黏度保留率仍大于90%。该压裂液用过硫酸铵破胶后的破胶液黏度小于5 m Pa·s,几乎无残渣,对地层伤害较小。
In order to obtain the thickener for fracturing fluids with good performance, using acrylamide（AM）,2-acrylamido-2-methyl-propanesulfon-icacid（AMPS）, Styrene（St） and acrylicacid（AA） as raw materials, P（AM-AMPS-St-AA）,named as TKF,was prepared by aqueous solution polymerization. The reaction condition was optimized by investigating the effects of monomer content,amount of initiator,reaction temperature,and reaction time on the viscosity of TKF solution. The structure of TKF was characterized by infrared spectroscopy,and the performances of the fracturing fluid used TKF as main ingredient,such as gelling ability,Temperature-resistance and Salt-tolerance,shear-resistance and gel breaking property,were evaluated. The results showed that,the TKF had good performance at following polymerization reaction,the content of St was 9% of the AM mass,the quality ratio of AM to AMPS was 3：7,the content of AA was 1.60% of the AM mass,the amount of initiator was 0.24% of the total monomer mass,the reaction temperature was 45℃,the reaction time was 4 hours,and p H was 8.The performances of the fracturing fluids of gelling ability,temperature-resistance and salt-tolerance,shear-resistance and gel breaking property were good. Adding 0.3% hexamethylene tetramine into the TKF solution with mass fraction of 0.3%,the gel was formed and the viscosity could reach up to 211 m Pa·s,the temperature resistance of the gel was of about 150℃,the viscosity could remain 100 m Pa·s when adding 10 g/L CaCl_2 into the gel solution,and the viscosity of the gel after shearing at 140℃ and 170 s-1for 120 min was greater than 90% of initial viscosity. In addition,the viscosity of the gel-breaking fluid could be reduced to below 5m Pa·s,after the gel was breaked by ammonium persulfate,and residue was little,reducing the damage to formation.
出处
《油田化学》
CAS
CSCD
北大核心
2016年第2期215-219,共5页
Oilfield Chemistry
基金
中央高校基本科研业务费专项资金"阴离子疏水缔合型聚合物压裂液稠化剂的合成及性能评价"(项目编号14CX02088A)
作者简介
张菅（1983-），女，西安石油大学应用化学专业硕士（2012），主要从事油田化学和提高采收率方向的研究，电话：0546—8393193，E-mail：zhangiian6612@126．com。
尹海亮（1977-），男，中国石油大学（华东）化学工程与技术专业博士（2011），本文通讯联系人，主要从事油田化学助剂、油气田增产和油气井工作液的研究工作，通讯地址：257061山东省东营市东营区北一路739号中国石油大学（华东）科学技术研究院，E-mail：yinhl@upc．edu．cn。
