抗超高温高密度油基钻井液用新型降黏剂的性能
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  • 英文篇名:Study on the Performance of New Ultra-high Temperature High Density Oil Base Mud Thinners
  • 作者:杨振周 ; 刘付臣 ; 周春 ; 李建成 ; 杨鹏 ; 燕松兵
  • 英文作者:YANG Zhenzhou;LIU Fuchen;ZHOU Chun;LI Jiancheng;YANG Peng;YAN Songbing;CNPC Engineering Technology R&D Company Limited;CNPC Houston R&D Center;Engineering Technology Research Institute,Great Wall Drilling Company of CNPC;
  • 关键词:高密度油基钻井液 ; 超高温 ; 降黏剂 ; 热稳定性 ; 流变性能 ; 降黏效率
  • 英文关键词:High density oil base drilling fluid;;Ultra-high temperature;;Thinner;;Thermal stability;;Rheology;;Thinning efficiency
  • 中文刊名:ZJYW
  • 英文刊名:Drilling Fluid & Completion Fluid
  • 机构:中国石油集团工程技术研究院有限公司;中国石油休斯敦技术研究中心;中国石油集团长城钻探公司工程技术研究院;
  • 出版日期:2018-03-30
  • 出版单位:钻井液与完井液
  • 年:2018
  • 期:v.35;No.192
  • 基金:国家科技重大专项课题“深井超深井优质钻井液与固井完井技术研究”(2016ZX05020-004);; 中国石油天然气集团公司重大科技专项“高温高密度钻井液与可排放海水基钻井液成套技术研发”(2013E-3802)
  • 语种:中文;
  • 页:ZJYW201802005
  • 页数:5
  • CN:02
  • ISSN:13-1118/TE
  • 分类号:39-43
摘要
针对高温高密度油基钻井液黏度升高的问题,合成了3种降黏剂A、B和C,降黏剂A为缩聚脂肪酸,由十二羟基硬脂酸、聚羟基硬脂酸、硬脂酸、十二羟基硬脂酸与硬脂酸反应后的产物和硬脂酸的均聚物中一种或几种的组合共聚得到,降黏剂B是由脂肪酸或油与聚胺在100~200℃反应,再与马来酸、酸酐在80~150℃反应,用40%的油醇、脂肪酸或缩聚脂肪酸稀释得到,降黏剂C是由缩聚脂肪酸与醇铵、聚氨反应得到的衍生物,对他们的作用机理进行了探讨。以高密度油基钻井液(2.2 g/cm~3)为基浆,加入劣质土污染或用重晶石将密度提高到2.4 g/cm~3,考察3种降黏剂在此条件下的降黏效果。研究结果表明,降黏剂A和降黏剂C可以很好地降低由于劣质固相引起的流变性能超标,可以提高油基钻井液的重复使用次数,降低成本;降黏剂B能很好地调节由加重剂引起的高密度钻井液的增黏,降低对泵压的要求;降黏效率可达77%,抗温达225℃。
        Three thinners, A, B and C have been synthesized to deal with extra viscosity of high temperature high density oil base drilling fluids. Thinner A, a condensation polymerized fatty acid, was obtained by copolymerizing one or more raw materials such as dodecahydroxyl stearic acid, polyhydroxy stearic acid, stearic acid, and the homopolymer of the product of dodecahydroxyl stearic acid and stearic acid with stearic acid. Thinner B was obtained by reacting the product of fatty acid or fat and polyamine at 100 ℃-200 ℃ with maleic acid and maleic acid anhydride at 80 ℃-150 ℃, and then dispersed the product with 40% oleyl alcohol, fatty acid or condensation polymerized fatty acid. Thinner C was a derivative from the reaction product of condensation polymerized fatty acid, alcohol amine and polyamine. The working mechanisms of these thinners are discussed in this paper. Added poor quality clay to contaminate or added barite to weight a high density(2.2 g/cm3) oil base mud to 2.4 g/cm3, then treated the weighted mud with three thinners to test their ability to reduce viscosity. It was found that the thinner A and the thinner C both were able to control the rheology of mud caused by the addition of poor quality clays within predetermined range, and the oil base mud can thus be reused for many more times, thereby reducing mud cost. The thinner B was able to reduce mud viscosity caused by the addition of barite, hence the pump pressure. The thinner B has thinning efficiency of 77%, and functions properly at 225 ℃.
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