In this work, a novel, low molecular weight amphiphilic polymer (LAP) with high content of surface-active functional groups was developed, and its effectiveness for emulsion-based enhanced oil recovery (EOR) in relatively low permeability reservoirs was evaluated. The LAP polymer can potentially be synthesized on an industrial scale through a free radical polymerization reaction between acrylamide (AM), methyl acrylate (MAA), and the unsaturated surfactant monomer 2-(acylamido)-dodecane sulfonic acid (C₁₂AMPS). The interfacial tension between 1000 mg L⁻¹ LAP water solution and Bohai crude oil at 50 °C was reduced to a low value of around 0.2 mN m⁻¹. Core flooding tests were also conducted to study the EOR potential and migration properties of LAP in porous media. The resistance and residual resistant factors of 1500 mg L⁻¹ LAP solution were measured to be 51.0 ± 0.1 and 16.5 ± 0.1, respectively, suggesting LAP's great potential to be used for reservoir profile control. In addition, oil recovered from a three-layer heterogeneous core by LAP solution was found to be comparable to that recovered using alkaline-surfactant-polymer (ASP) flooding. It is also worth mentioning that to accommodate different reservoir conditions, the molecular weight of LAP is adjustable by modifying the concentration of chain transfer agent, surfactant monomer, or initiator.

中文翻译：

---

一种用于提高采收率的低分子量两亲聚合物的合成与评价

在这项工作中，开发了一种具有高含量表面活性官能团的新型低分子量两亲聚合物 (LAP)，并评估了其在相对低渗透油藏中基于乳液提高采收率 (EOR) 的有效性。LAP 聚合物可以通过丙烯酰胺 (AM)、丙烯酸甲酯 (MAA) 和不饱和表面活性剂单体 2-(酰氨基)-十二烷磺酸 (C ₁₂ AMPS)之间的自由基聚合反应在工业规模上合成。1000 mg L ^-1 LAP 水溶液和渤海原油在 50 °C之间的界面张力降低到约 0.2 mN m ^-1的低值. 还进行了岩心驱替试验以研究 LAP 在多孔介质中的 EOR 潜力和运移特性。测得1500 mg L ^-1 LAP 溶液的阻力和残余阻力系数分别为51.0 ± 0.1 和16.5 ± 0.1，表明LAP 具有用于储层调剖的巨大潜力。此外，发现通过 LAP 溶液从三层非均质岩心回收的石油与使用碱性表面活性剂聚合物 (ASP) 驱油回收的石油相当。还值得一提的是，为了适应不同的储层条件，可以通过改变链转移剂、表面活性剂单体或引发剂的浓度来调节 LAP 的分子量。