Energies
·
2019
·Vol. 12
·期 5
·781
·
IF 2.707
Songyan Li,Chenyu Qiao,Guowei Ji,Qun Wang,Lei Tao
Foam is a kind of ideal fluid for profile control in petroleum engineering, which has attracted intense interests of scholars globally in recent years. In this study, a foam system stabilized with anionic surfactants and clay particles was proposed for profile control in reservoirs, and the formulation was optimized experimentally. Moreover, flooding experiments in visible porous media models and in sandpacks were conducted to test the plugging effect of the foam system on reservoirs, and the effects of different factors such as gas–liquid ratio, temperature and permeability on profile control were also evaluated. According to the experimental results, the clay-HY-2 system was elected for its satisfactory foamability, stability, and salinity resistance, and the optimum concentrations of HY-2 and clay particle are 0.6 wt% and 5.0 wt%, respectively. Compared with traditional foam fluids, the clay-HY-2 system can form denser and smaller bubbles in high- and middle-permeable layers, enhancing the plugging effect there, while there are less bubbles in low-permeable layers, i.e., the restriction on the flow in narrow structures is slight. The clay-HY-2 foam can perform the efficient and uniform profile control effect on sandpacks when the foam quality is around 50%. The resistance factor of the foam decrease gradually with the increasing temperature, however, the resistance factor remains higher than 350.0 when the temperature reaches 80.0 °C. When the permeability exceeds 1502.0 mD, the clay-HY-2 foam can perform deep profile control in reservoirs, and the resistance factor are not sensitive to the change of permeability when it exceeds 3038.0 mD. Besides, the site application case shows that the clay-HY-2 foam do have good profile control effect on reservoirs, i.e., improving oil production and declining water cut.Keywords:clay enhanced foam;profile control;enhance oil recovery (EOR);site application
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Magnetochemistry
·
2024
·Vol. 10
·期 7
·44
·
IF 2.6
Xianxiao Song,Weiting Ma,Ping Song,Hongying Wang
Featured ApplicationThis magnetic marker material is used for large-scale field signal marking, offering the advantages of stable, rapid, and portable detection.AbstractWith the widespread application of tagging materials, existing chemical tagging materials exhibit limitations in stability and detection under field conditions. This study introduces a novel magnetic detection scheme. Hydrophilic material-modified Fe3O4nanoparticles (COOH-PEG@Fe3O4NPs) were synthesized using the co-precipitation technique. The content of Fe3O4nanoparticles in the magnetic tagging liquid can reach up to 10 wt% and remain stable in an aqueous phase system for seven days. This research details the preparation process, the characterization methods (IR,1HNMR, EDX, XRD, SEM, TEM, VSM, DLS), and the performance effects of the materials in magnetic tagging. Experimental results indicate that COOH-PEG@Fe3O4NPs exhibit high remanence intensity (Br = 1.75 emu/g) and considerable stability, making it possible to quickly detect tagged liquids in the field using portable flux meters and optical pump magnetometers. This study provides new insights into the design and application of magnetic tagging materials, making it particularly suitable for long-term tagging and convenient detection in field scenarios.
研究领域:
材料科学
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纳米技术
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Shengxi Zhai,Mengyuan Bai,Fengling Yue,Haifang Wang,Jingcheng Huang,Haowei Dong,Bei Yuan,Zhengtao Li,Pengwei Zhang,Mingxin Zhao,Yemin Guo,Xia Sun,WenPing Zhao
A lateral flow chromatography strip (LFS) is a chromatography-based biosensor with advantages of convenient carrying, simple operation and rapid detection. In this study, a novel rapid detection technique of aptamer-based chromatography strip was developed and used for the first time for the residue detection of tetracycline antibiotics (TCs) in various milk samples. In this method, gold nanoparticles (AuNPs) modified by TCs specific aptamers were used as probes, and cationic polymers as a capture molecule in a test line (T-line). Meanwhile, the analysis of the gray value of the T-line enabled a linear detection range of 1–300 nM and a limit of detection (LOD) of 0.33 nM for quantitative analysis. The biosensor demonstrated specificity, stability, and successfully detected tetracyclines in milk samples with recovery between 93.60 %–106.20 %. This method sets a basis for multi-residue antibiotics detection in diverse samples, showing potential for on-site applications.
研究领域:
分析化学
·
生物传感器
·
食品安全
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）