一种两性离子聚合物降粘剂的合成与性能评价
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1.西南石油大学,化学化工学院,四川成都;2.川庆钻探工程有限公司钻井液技术服务公司,四川成都

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四川省科技计划项目“应用光镊研究不同处理剂对水基钻井液的稳定机理”(项目编号2020YJ0363)


Synthesis and Performance Evaluation of an Amphoteric Polymer Viscosity Reducer
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Southwest Petroleum University,Sichuan

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    摘要:

    本文采用丙烯酸(AA)、2-丙烯酰氨-2-甲基丙磺酸(AMPS)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为单体,基于水溶液爆聚法工艺,采用绿色环保的二硫化四甲基秋兰姆(TMTD)代替常用巯基化合物链转移剂,合成了一种低分子量两性离子聚合物钻井液用降粘剂。以室温降粘率为考核指标,确定了降粘剂的最佳合成条件:单体浓度55%,TMTD加量为0.75%,氧化-还原引发剂加量占单体浓度的3%,NaOH中和(AA+AMPS)50%,AMPS加量为 5.5%,DMC加量为4.5%。在此条件下,合成所得两性离子聚合物降粘剂的数均分子量为914 g/mol,其淡水基浆中的降粘率为91.53%,且具有良好的抗温性能,可以满足180℃的抗温要求。本研究为低分子量两性离子降粘剂的合成工艺提供了更绿色环保的选择。

    Abstract:

    In this paper, acrylic acid (AA), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), and methacryloxyethyl trimethylammonium chloride (DMC) wereSusedSasSmonomers, based on the aqueous solution explosion polymerization process, a low molecular weight zwitterionic polymer viscosity reducer for drilling fluids was synthesized by using environmentally friendly tetramethylthiuram disulfide (TMTD) instead of sulfhydryl compound as the chain transfer agent. Taking the room temperature viscosity reduction rate as the evaluation index, the optimum synthesis conditions of the viscosity reducer have been determined: the monomer concentration was 55 wt%, the addition of TMTD was 0.75 wt%, the addition of oxidation-reduction initiator was 3 wt% of the monomer concentration, the neutralization of (AA+AMPS) was 50%, the addition of AMPS was 5.5 wt%, and the addition of DMC was 4.5 wt%. Under this condition, the number average molecular weight of the synthesized zwitterionic polymer viscosity reducer is 914 g/mol, and its viscosity reduction rate in the fresh water base slurry is 91.53%, and it has good temperature resistance, which can meet the temperature resistance requirement of 180 ℃. This research provides a green and environmentally friendly option for the synthesis of low molecular weight zwitterionic viscosity reducer.

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  • 收稿日期:2022-01-27
  • 最后修改日期:2022-03-22
  • 录用日期:2022-04-01
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