Petroleum Science
·
2024
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IF 6
Ya-Xing Dai,Xian-Li Zhang,Si-Yuan Liu,Feng-Run-Ze Zhang,Yi-Xi Zhang,Yu-Tong Sang,Jing-Xi Zheng,Zhao-Sheng Liu,Peng Zhang
Two allyldimethylalkyl quaternary ammonium salt (AQAS) monomers, N , N -dimethylallylphenylpropylammonium bromide (AQAS1) and N , N -dimethylallylnonylammonium bromide (AQAS2), were synthesized and used to prepare modified polyacrylamide materials. Two new drag reducers were synthesized from acrylamide (AM), sodium acrylate (NaAA) and a cationic modified monomer (AQAS1 or AQAS2) via aqueous solution polymerization, and the copolymers were named P(AM/NaAA/AQAS1) and P(AM/NaAA/AQAS2), respectively. The structures of the drag reduction agents were confirmed by IR and 1 H NMR spectroscopies. The molecular weight ( M w ) of P(AM/NaAA/AQAS1) was 1.79 × 10 6 g/mol. When the copolymer concentration was 1000 mg/L and the flow rate was 45 L/min, in fresh water the highest drag reduction rate was 75.8%, in 10,000 mg/L NaCl solution the drag reduction rate decreased to 72.9%. The molecular weight of P(AM/NaAA/AQAS2) was 3.17 × 10 6 g/mol. When the copolymer concentration was 500 mg/L and the flow rate was 45 L/min, the drag reduction rate reached 75.2%, and in 10,000 mg/L NaCl solution the drag reduction rate was 73.3%, decreased by approximately 1.9%. The drag reduction rate for partially hydrolyzed polyacrylamide (HPAM) was also investigated, and the results showed that the drag reduction rates for 500 and 1000 mg/L HPAM solutions were merely 43.2% and 49.0% in brine, respectively. Compared with HPAM, both of the above copolymers presented better drag reduction capacities.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Bionic Engineering
·
2025
·
IF 5.8
Lin Zhen,Xu Peng,Huang Junfei,Zhang Jinhong,Zhang Xiaolong,Li Lijun,Zhang Yurong,Wang Ruteng,Long Xinping,Lei Yifeng,Song Changhui,Chen Daobing,Xue Longjian
Bioinspired superhydrophobic surfaces have been used for drag reduction. However, the secondary structures and the air cushions on these surfaces could be destructed in a flow, losing the effect of drag reduction. Here, a stainless-steel surface with mushroom-like cross-section (SMC) and diamond cavities (SMC D ) having a drag reduction rate up to 19.37% is developed by 3D printing. The concealed re-entrant structures in SMC D prevent the infiltration of water into the chamber and form gas cushions, which converts the sliding friction at liquid-solid interface into rolling friction at liquid-gas interface, realizing the drag reduction. Meanwhile, 98.3% of air can be maintained in the chamber in a flow with Reynolds number ( Re ) of 9 × 10 5 , ensuring the drag reduction in a high-velocity flow. Moreover, the continuous top stainless-steel surface and the supporting mesh network protect the critical re-entrant structures, ensuring the robustness of SMC. With the bioinspired design and one-step additive manufacturing process, SMC holds great potential for large-area production and applications requiring robust drag reduction.
研究领域:
流体力学
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材料科学
·
仿生工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Mingwei Zhao,Xu Guo,Yining Wu,Caili Dai,Mingwei Gao,Ruoqin Yan,Yunlong Cheng,Yang Li,Xuguang Song,Xiangyu Wang,Zhixue Chen
A novel viscoelastic surfactant (VES) fracturing-flooding system composed of amphoteric surfactant octadecyl hydroxypropyl sultaine (OCHSB), cationic surfactant octadecyl trimethyl ammonium chloride (OTAC) and p -toluene sodium sulfonate (NaPts) is proposed to greatly enhance oil recovery. The synergistic effects of two surfactants and counterions were explored and the optimal dosage was determined. Rheological tests show that the system has excellent viscoelastic properties and shear resistance. The shear viscosity of the system with the addition of 4.8 wt% is higher than 25 mPa·s at 80 °C and 170 s −1 . Meanwhile, the drag reduction rate of the system can reach more than 70%. In addition, the system breaks the gel thoroughly, has excellent anti-swelling properties, and the damage to the formation is less than 5%. Finally, the enhanced oil recovery regulations of the system were studied through flooding experiment, and its mechanism was analyzed. The enhanced recovery proves that the system has the dual effects of fracturing and flooding.
研究领域:
石油工程
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）