石油钻采工艺Issue(5)：41-45,63,6.DOI:10.13639/j.odpt.2015.05.011
基于疏水缔合聚合物的新型钻井液封堵剂
A new type plugging agent for drilling lfuid based on hydrophobic associative polymer
摘要
Abstract
In view of the problem that conventional plugging agent cannot realize effective plugging to heterogeneous permeable reservoirs, based on the association theory of hydrophobic associative polymers and using the method of polycondensation in a solvent and through molecular structure optimization design, a new type of hydrophobic associative polymer (HMP) was synthesized of acrylamide (AM)/octadecyl dimethyl allyl ammonium chloride (C18DMAAC)/acrylic acid sodium (AANa). The infrared spectrum, element analysis and gel chromatography were used to represent and measure the molecular structure and molecular weight of HMP, and it’s feasibility of being the drilling lfuid plugging agent was discussed in this paper. Results show that the weight-average molecular weight of the new type of hydrophobic associative polymer (HMP) was less than 100 000, which had small inlfuence on the rheological properties of drilling lfuid. When molar content in hydrophobic monomer C18DMAAC in HMP molecules was up to 0.66% and the mass concentration of HMP in drilling lfuid was up to 0.6%, then it would have excellent sealing performance, and can realize effective sealing of quartz sand bed and cores of different permeability under the condition of high temperature and high pressure and the resulting sealing layer was thin and tight. Results of particle size distribution measurement show that HMP broadens the scope of particle size distribution of drilling lfuid system to a few microns to a few hundred microns, and can signiifcantly increase the average particle size of the system. This is the main reason for its good sealing performance.关键词
疏水缔合聚合物/钻井液/封堵剂/性能评价/粒度分布Key words
hydrophobic associative polymer/drilling lfuid/plugging agent/performance evaluation/particle size distribution分类
能源科技引用本文复制引用
谢彬强,郑力会..基于疏水缔合聚合物的新型钻井液封堵剂[J].石油钻采工艺,2015,(5):41-45,63,6.基金项目
国家自然科学基金“基于温敏聚合物的水基钻井液恒流变特性研究”（编号51404040）。 （）
