摘要
以丙烯酰氧乙基三甲基氯化铵(DAC)、乙烯基吡咯烷酮(NVP)、丙烯酰胺(AM)和2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为单体,(NH4)2S2O8-Na HSO3为引发剂,采用自由基水溶液聚合的方式合成了一种四元共聚物钻井液降滤失剂。通过正交实验确定了具有最佳降滤失效果的合成条件,采用FTIR及1HNMR对共聚物的结构进行了表征。性能评价结果表明,合成的共聚物具有良好的耐温抗盐和降滤失性能,聚合物质量分数为1.5%时,淡水、盐水、饱和盐水以及复合盐水基浆的API滤失量(0.7 MPa,30 min)分别为5.6、9.7、19.0和16.1 m L。与新疆油田常用的SP-8、JT888、MAN104和HJ-3这4种降失水剂相比,合成的聚合物表现出了更好的降滤失性能。现场适用评价表明,该降滤失剂与新疆油田常用的钾钙基聚磺钻井液体系、正电胶钻井液体系以及聚磺钻井液体系都具有良好的现场适用性。
Copolymer,which was used as fluid loss additive for drilling fluid was synthesized by free radical polymerization in aqueous solution,using N-Vinyl-2-pyrrolidon（ NVP）,Dimethylam-inoethyl acrylate methylchloride（ DAC）,2-Acrylamide-2-methylpropanesulfonic acid（ AMPS） and acrylamide（ AM） as monomers,ammonium persulfate and sodium sulfite as initiators. The synthetic conditions with optimal property were achieved by the orthogonal experiment,and the structure of copolymer was characterized by FTIR and1 HNMR. The results of performance evaluation showed that the synthesized copolymer had excellent temperature resistance,good heat resistance as well as salt tolerance. When the mass fraction of copolymer was 1. 5%,the API filtrate volume（ 0. 7 MPa,30 min） of fresh water drilling fluid,saline water drilling fluid,saturated- brine drilling fluid and composite- brine drilling fluid were 5. 6,9. 7,19. 0 and 16. 1 mL. Compared with frequently- used fluid loss additives of SP- 8,JT888,MAN104 and HJ- 3 in Xinjiang oil field,the synthesized copolymer showed the better property in controlling the fluid loss of drilling fluid system. The evaluation of field application demonstrated that the fluid loss additive had good site suitability with potassium calcium based sulphonated polymer drilling fluid system,MMH drilling fluid system,and sulphonated polymer drilling fluid system in Xinjiang oil-field.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2016年第5期574-581,共8页
Fine Chemicals
关键词
钻井液
降滤失剂
性能评价
现场适用性
油田化学品
drilling fluid
fluid loss additive
performance evaluation
field application
oil-field chemicals
