摘要
为解决油田采出水管道系统结垢问题,通过对防垢剂作用机理和分子结构的设计与分析,以马来酸酐(MA)、2-丙烯酰胺基-2-甲基-1-丙磺酸(AMPS)、烯丙基聚乙二醇1000(APEG-1000)合成聚合物MA/AMPS/APEG-1000防垢剂。根据油田用防垢剂评价标准,测定单因素合成防垢剂的防垢率,以此确定合成最佳条件:反应单体配比n(MA)∶n(AMPS)∶n(APEG-1000)=2∶1∶0.002,引发剂浓度3.5%,反应时间6h,反应温度85℃,单体总质量分数20%。由红外光谱(FTIR)分子结构表征结果表明,合成的样品与预期结构一致;凝胶色谱(GPC)相对分子质量测定MA/AMPS/APEG-1000的M_w=3145,为低相对分子质量聚合物;防垢性能实验结果表明,当钙离子浓度较高时,碳酸钙微晶会包裹聚合物分子,弱化防垢性能,当钙离子浓度合适时,MA/AMPS/APEG-1000防垢剂对碳酸钙有良好的防垢效果。
Aimed at solve the scaling problem of the produced water pipeline system in oilfield.Based on the inhibition mechanism and design and analysis of molecular structure,oligomeric carboxylic inhibitor AM/AMPS/APEG was synthesized with maleic anhydride（MA）,2-acrylamide-2-methyl-1-propanesulfonic acid（AMPS）,allylpolyethylene glycol 1000（APEG-1000）for calcium carbonate scale.According to the oilfield scale inhibitor evaluation standard,the inhibition rate of the single factor synthetic scale inhibitor was determined to choose the optimal synthesis conditions：the molar ratio of reaction monomer is 2∶1∶0.002,the initiator concentration is 4.0%,the reaction time is 6 hand the reaction temperature is 85℃,the total monomer concentration is 20%.FTIR molecular structure characterization indicated that the synthesized samples were consistent with the expected structure.Gel permeation chromatography（GPC）testing the molecular weight of MA/AMPS/APEG and the M_w=3 145,a low molecular weight polymer.At a temperature of 70℃ and the addition of 100 mg/L,the inhibition efficiency of calcium carbonate was 90.12%.The inhibition performance of anti-scaling rate of results show that when the calcium concentration is high,the calcium carbonate microcrystal will enclose the polymer molecules and weaken the anti-scaling property.When the concentration is suitable,MA/AMPS/APEG scale inhibitor has good anti-scaling properties for calcium carbonate.
作者
全红平
谢林红
饶政
何帆
唐坤利
Quan Hongping;Xie Linhong;Rao Zheng;He Fan;Tang Kunli(School of Chemistry and Chemical Engineering of Southwest Petroleum University,Chengdu 610500,Sichuan,China;Oil ＆ Gas Field Applied Chemistry Key Laboratory of Sichuan Province,Chengdu 610500,Sichuan,China;Shixi Oil field Operation Area of Xinjiang Oil field Branch Offices of China National Petroleum Corporation,Kelamayi 834000,Xinjiang,China;Zhundong Oil Production Plant of Xinjiang Oil field Branch Offices of China National Petroleum Corporation,Fukang 831511,Xinjiang,China)
出处
《精细石油化工》
CAS
CSCD
北大核心
2018年第4期1-7,共7页
Speciality Petrochemicals
基金
西南石油大学科研启航项目(2015QHZ015)
油气田应用化学重点实验室开放项目(YQKF201401)
