文章摘要
水基恒流变钻井液流型调节剂的制备与性能评价
Evaluation on Preparation and Performance of Rheological Modifier Used in Flat-rheology Water-based Drilling Fluid
  
DOI:
中文关键词: 水基恒流变钻井液  流型调节剂  球形聚合物  性能评价  作用机理
英文关键词: flat-rheology water-based drilling fluid  rheological modifier  spherical polymer  performance evaluation  action mechanism
基金项目:国家 863课题“低温固井实验仪器研制及体系实验评价研究-深水表层钻井液及泥浆技术研究”(项目编号 JSKF2009YJ45),十三五重大专项课题“页岩气水平井钻井液与固井技术研究”(项目编号 2016ZX05060-015)。
作者单位
黄 孟 1,许 林 2,许 洁 3,高 涵 4,由福昌 5,刘卫红 5 1. 中海油能源发展股份有限公司工程技术深圳分公司广东 深圳 5180672. 浙江海洋大学石化与能源工程学院浙江 舟山 3160223. 中国地质科学院勘探技术研究所河北 廊坊 0650004. 新疆油田公司工程技术研究院新疆 克拉玛依 8340005. 长江大学湖北省非常规油气中心湖北 武汉 430100 
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中文摘要:
      流型调节剂是实现水基钻井液恒流变特性的关键处理剂。以丙烯酸(AA)、丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)单体为主要原料,采用反相微乳液方法合成了一种流型调节剂,表征了产物的结构、分子形貌、热稳定性等,比较了流型调节剂与传统处理剂对水基钻井液流变性能的影响,结合流型调节剂的分子聚集态结构分析了恒流变机理。结果表明,流型调节剂黏均分子量约 7.5×106,平均粒径为 258.7 nm,抗温可达260℃。在水基钻井液中,流型调节剂具有良好的流变控制能力,可显著降低温度变化(4~ 65℃)对关键流变参数的影响。流型调节剂分子的核-壳结构提高了分子刚性和稳定性,其亲水基团在壳层的层级分布可补偿基团损耗,从而维持有效基团数量,确保与黏土片层的缔合作用,维持水基钻井液的稳定性。图 6表 1参21
英文摘要:
      Rheological modifier was a key additive to enable flat rheology property for water-based drilling fluids. A specific rheological modifier was synthesized by reverse microemulsion method using acrylic acid (AA),acrylamide (AM) and 2-acrylamido-2-methyl-propane sulfonic acid (AMPS) as raw materials. The structure,morphology and thermal stability of synthesized product were characterized. Meanwhile,the rheological behavior of rheological modifier and traditional viscosifier in water-based drilling fluid was comparatively investigated. Also,the flat-rheology mechanism of water-based drilling fluid was explored,in combination with the molecular aggregation structure of rheological modifier. The results showed that the average molecular weight of rheological modifier was 7.5×106,the average particle size was 258.7 nm,and the temperature resistance was high up to 260℃ . In water-based drilling fluid,the rheological modifier adjusted the rheological property well,which could dramatically reduce the influence of temperature variation (4—65℃) on rheological parameters. It was concluded that the core-shell structure of rheological modifier should reinforce molecular rigidity and stability. In particular,a layer distribution of hydrophilic radicals around the shell could compensate radical loss caused by harsh environment,and sustain the total quantity of effective radicals. As a result,the association action between polymeric molecular and clay layers could be well maintained,and the flat-rheology of water-based drilling fluid could be realized.
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