新型小分子耐高温粘土稳定剂ZWS-1的合成与性能评价
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中国石油大学华东化学工程学院

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Synthesis and evaluation of a new small molecular clay stabilizer ZWS-1with high temperature resistant
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School of Chemical Engineering,China University of Petroleum East China,Qingdao

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    摘要:

    针对当前无机盐型粘土稳定剂耐水洗效果差,聚合物型高分子粘土稳定剂易吸附阻塞孔道且耐温性能差等问题,开发用于高温低渗油藏的新型小分子粘土稳定剂已迫在眉睫。本论文采用三甲胺与γ-氯丙基三乙氧基硅烷合成小分子耐高温粘土稳定剂ZWS-1,通过对其防膨性能与耐水洗性能的测定确定最佳使用浓度为1.5%。复配试验优选出最佳的复配方案为1.5%ZWS-1+4%KCl(150℃下,粘土防膨率为98.3%,耐水洗率为91.4%)。偏光显微镜观察表明ZWS-1可以将粘土团聚为颗粒,增加粘土的稳定性,傅里叶红外光谱结果表明ZWS-1与粘土矿物表面羟基发生脱水缩合反应,证实ZWS-1与粘土矿物表面存在化学键作用。

    Abstract:

    In view of the problems such as poor washing resistance of inorganic salt clay stabilizer, easy adsorption and blockage of pore channel and poor temperature resistance of polymer clay stabilizer, it is urgent to develop a new type of small molecule clay stabilizer for high temperature and low permeability reservoir. In this work, high temperature resistant clay stabilizer ZWS-1 was synthesized with trimethylamine and γ-chloropropyltriethoxysilane. The optimized weight concentration of ZWS-1 applied for clay stabilization was 1.5%. A synergistic effect was observed on 5% ZWS-1 and 4% KCl, which exhibited a decrement of clay swelling of 98.3%, and the washing resistance of 91.4% at 150 ℃. The characterization results indicate that ZWS-1 leads to the agglomeration of clay particles and increase the stability of clay. Fourier transform infrared spectroscopy (FTIR) results reveal that ZWS-1 reacts with hydroxyl groups of the clay surface, which indicates that the presence of chemical bond between ZWS-1 and clay minerals.

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  • 收稿日期:2020-09-15
  • 最后修改日期:2020-09-15
  • 录用日期:2020-11-23
  • 在线发布日期: 2021-11-03
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