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以丙烯酰胺(AM)、丙烯酸(AA)、2-甲基-2-丙烯酰胺基丙磺酸(AMPS)和长碳链酰胺型疏水单体(AP)为原料,采用自由基水溶液聚合合成了疏水缔合水溶性聚合物(HPAP)。以HPAP作为包被增粘剂构建了新型聚合物钻井液体系,本文对其性能进行了研究。结果表明,该聚合物钻井液的动塑比高(YP/PV≥0.7)、低剪切速率粘度高(LSRV≥30000mPa·s),具有优良的剪切稀释能力和强的动、静态携砂能力;可抗140℃高温;具有优异的抗盐性能,钻井液在高浓度NaCl盐水中性能优良;可抗10%以上CaCl2、MgCl2污染;具有好的抗械剪切能力。HPAP可以用于配制高矿化度盐水聚合物钻井液。
The acrylamide (AM), acrylic acid (AA), 2-methyl-2-acrylamidopropanesulfonic acid (AMPS) and long chain carbon chain amide monomer (AP) were synthesized by free radical polymerization Hydrophobically Associating Water-Soluble Polymer (HPAP). HPAP as coating thickener to build a new polymer drilling fluid system, this paper studied its performance. The results show that the polymer drilling fluid has high ratio of kinematic plasticization (YP / PV≥0.7) and high viscosity at low shear rate (LSRV≥300,000 mPa · s), and has excellent ability of shear thinning and strong dynamic sand loading Ability; can be resistant to 140 ℃ high temperature; has excellent salt resistance, drilling fluid performance in high concentrations of NaCl brine; can be resistant to more than 10% CaCl2, MgCl2 pollution; has good resistance to shear capacity. HPAP can be used to formulate highly salinity brine polymer drilling fluids.