长链端基疏水缔合减阻剂的制备与性能评价

Preparation and Performance Evaluation of Hydrophobically Associating Drag Reduction with a Long-chain End-group

杨霖 梁兵

YANG Lin，LIANG Bing

为发展新型滑溜水减阻剂，以丙烯酰胺（AM）、疏水单体十二烷基二甲基烯丙基氯化铵（C12DMAAC）、丙烯 酸钠（NaAA）为原料，通过自制长链疏水引发剂2，2'-偶氮二异丁基十二脒盐酸盐（AIBL）制备了长链端基疏水 缔合聚合物（HPAM-L），通过红外光谱仪、核磁共振波谱仪、乌氏黏度计、荧光分光光度计和旋转流变仪等对 HPAM-L 的结构与性能进行表征，利用压裂液摩阻测试仪测定了不同浓度HPAM-L溶液的减阻性能。结果表 明，HPAM-L 的相对分子质量为7.43×106，临界缔合浓度为1～1.5 g/L，具有良好的耐温性和剪切稳定性。 HPAM-L的水溶液具有较宽的线性黏弹区，且浓度越高弹性特征越明显。在溶液质量分数为0.075%、0.086%、 0.1%、0.15%下的最大减阻率分别可达到71.6%、73.1%、73.3%和74.1%，减阻性能良好。

In order to develop a new type of slick water reducer，the long-chain end-group hydrophobic associating polymer HPAM-L was prepared from acrylamide（AM），hydrophobic monomer dodecyldimethylallylammonium chloride（C12DMAAC）， sodium acrylate （NaAA） and homemade long-chain hydrophobic initiator 2，2'-azobis（isobutyl）dodecamidine hydrochloride （AIBL）. The structure and properties of HPAM-L were characterized by infrared spectroscopy，nuclear magnetic resonance spectroscopy， Ubbelohde viscometer， fluorescence spectrophotometer and rotational rheometer. The resistance reduction performance of HPAM-L solutions with different concentrations was measured by using fracturing fluid friction tester. The results showed that the relative molecular weight of HPAM-L was 7.43 × 106，and the critical association concentration was 1—1.5 g/L. HPAM-L had good temperature resistance and shear stability. The aqueous solution of HPAM-L had a wide linear viscoelastic region. The higher the concentration，the more obvious the elastic characteristic was. The maximum drag reduction rates at the solution mass fractions of 0.075%，0.086%，0.1% and 0.15% could reach 71.6%，73.1%，73.3% and 74.1%，respectively， showing good drag reduction performance.

10.19346/j.cnki.1000-4092.2022.03.020