文章摘要
新型冻胶封隔材料的制备及性能
Preparation and Performance of Gel Valve for Smart Pack Completion Technology
  
DOI:10.19346./j.cnki.1000-4092.2017.04.002
中文关键词: 冻胶  封隔材料  高强度  破胶  可控成胶
英文关键词: gel  smart pack  high strength  gel-breaking property  controllable gelation
基金项目:中国石油科技创新基金项目 “不压井作业冻胶阀新材料的设计合成与性能评价”(项目编号2014D-5006-0309) 和国家自然科学 基金项目 “gemini表面活性剂对原油-水界面性质的影响”(项目编号51404039)
作者单位
鲁晓华1, 程 立1,2, 廖锐全1, 张慢来1, 李 振3 1. 长江大学中石油采油采气重点实验室 湖北 武汉 4301002. 油气钻井技术国家工程实验室防漏堵漏技术研究室 湖北 武汉 430100) 3. 长江大学城市建设学院 湖北 荆州 434023 
摘要点击次数: 255
全文下载次数: 
中文摘要:
      针对普通冻胶本体强度弱和成胶时间不可控等问题, 采用双交联体系 MEA/MEB, 通过丙烯酰胺 (AM)、 甲基丙烯酸钠(NaMAA)对淀粉进行接枝改性制备了冻胶封隔材料。采用高温高压稠化仪模拟冻胶现场应用环境, 研究了丙烯酰胺用量、 交联剂 MEA用量、 pH值、 黏度调控剂 (HXC) 用量和加重材料类别对冻胶性能的影响,得到了基础配方为 5% 淀粉+4% 丙烯酰胺+2% 甲基丙烯酸钠+ 0.125% 交联剂 MEA+5% 交联剂 MEB+6.5% 增韧剂 SL-2 +0.0025% 引发剂 APS的冻胶封隔材料, 考察了该冻胶体系的稠化性能、 可破胶性能以及三种常用加重材料对冻胶强度的提升作用。结果表明, 基础配方的冻胶材料本体强度可达 25 N; 通过调节 pH值 7~13, 可实现 1~ 3 h的可控成胶时间; 采用铁矿粉(1200 目)调节密度至 1.4 g/m3的同时可使冻胶本体强度提高 24%; 采用自制环保型破胶液可实现有效破胶, 破胶后呈流体状, 黏度低至 42 mPa·s, 便于及时返排, 为该冻胶封隔材料的现场应用提供了安全保障。图 4表 3参 19
英文摘要:
      Aimed at the problem of the ordinary gel’ s weak strength,uncontrollable gelling time with well completion control in shale gas,a new type of the double crosslinking system MEA/MEB was used and the starch grafting modification was realized by the reaction of acrylamide (AM) and sodium methacrylate (NaMAA) with starch. By employing the high-temperature and high-pressure thickener to simulating the application environment of the gel system,the effect of the acrylamide dosage,crosslinking agent MEA dosage,the viscosity controlling agent HXC dosage,and pH value,et al,on the performance of the gel was investigated,and the gel’ s basic formulation was obtained as follows,5% starch + 4% acrylamide + 2% sodium methacrylate+ 0.125% cross-linking agent MEA + 5% crosslinking agent MEB + 6.5% toughening agent SL-2 + 0.0025% initiator APS. The thickening properties and the breakable property of the gel system were probed and enhancing degree of the gel system by three commonly-used weighing materials was investigated as well. The results showed that the basic formula gel materials could withstand the strength of 25 N. Through adjusting the pH value of 7—13,the gelling time of the obtained pack material ranged from 1 to 3 hours. The density of the gel material could be increased to 1.4 g/m3 after adding iron ore fines with 1200 mushes,meanwhile,the strength of the gel could be increased by 24%. The gel with high strength could be broken effectively by self-made environment-friendly breaker after well-completion operation,whose viscosity was as low as 42 mPa·s,which ensured the gel-breaking fluid flowback and provided guarantees for convenience and security of the field application of the gel packer.
查看全文   查看/发表评论  下载PDF阅读器
关闭
点击这里给我发消息

点击这里给我发消息