CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhongzheng Xu,Mingwei Zhao,Yiming Zhang,Pan Wang,Yining Wu,Lin Li,Xin Cui,Ning Sun,Caili Dai
Superhydrophobic wettability inspired by the “lotus effect” is an intriguing property in nature, but it is rarely applied in oilfield development. Superhydrophobic nanomaterials can effectively solve the problem of “high injection pressure and insufficient water injection” in low permeability oilfields by changing the properties of the core surface, which is of great significance to the development of low permeability oilfields. Herein, we report a novel type of superhydrophobic nanoparticle (SHNP) simply modified by fluorinated long chains, and a stable nanofluid is successfully prepared by compounding surfactant. The prepared SHNP nanofluid has an excellent core drag reduction effect, and the drag reduction rate is 1.35 times that of conventional NPs under the same conditions. The SHNPs assemble on the core surface to form a large number of micro/nanorough structures, which can effectively reduce the surface roughness of the core. The PIV experimental results show that compared with the injection of pure water, the center flow velocity in the subsequent water flooding center increases by 98.27% after the injection of SHNPs nanofluid (the flow velocity decreases by 53.45% after the injection of NPs). Moreover, bubble probe AFM technology has successfully shown that bubbles can be captured through the SHNPs superhydrophobic interface to form a gaseous film. By using the barrier effect of the gaseous film, the liquid–solid interface is converted to a liquid–gas-solid interface, thereby reducing the large resistance caused by the direct contact between the liquid and solid. Such SHNPs with simple modification and low cost have broad application potential in oilfield development.
研究领域:
石油工程
·
材料科学
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mingwei Zhao,Yuxin Xie,Lin Li,Caili Dai,Zhongzheng Xu,Yunbo Dong,Hongbo Zeng
Decreasing injection pressure and increasing water injection are crucial methods to enhance oil recovery in low permeability reservoirs. However, the high injection pressure, constrained by the reservoir's low porosity and permeability, limits the amount of injected water, consequently resulting in low recovery. In this study, inspired by the ''lotus effect'' of superhydrophobic wettability, we synthesized superhydrophobic nanoparticles by grafting fluorine-containing long chains onto the surfaces of SiO 2 nanoparticles. Nanofluids with small particle size (7 nm), high stability, and strong hydrophobicity (162°) were prepared by compounding modified SiO 2 nanoparticles with surfactants. The functional properties of the nanofluids revealed a depressurization rate of 23.13 % and the 23.90 % increase in flow rate at the channel center. Modified nanoparticles altered the surface wettability from hydrophilic to superhydrophobic. Surface free energy, determined using a three-probe-liquid method, demonstrated a significant reduction after hydrophobic modification. The surface hydrophobic interaction was tested and quantified by AFM measurements. The results show that the adhesion force is much larger than that of the unmodified hydrophilic surface. Through these analyses, we propose an efficient depressurization mechanism facilitated by the superhydrophobic layer formed by modified SiO 2 nanoparticles. This work offers technical and theoretical support for the efficient development of low permeability reservoirs.
研究领域:
石油工程
·
材料科学
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Lin Li,Yunbo Dong,Xiao Jin,Zizhao Wang,Jinming Liu,Caili Dai
In water injection development of low-permeability reservoirs, the elevated flow resistance between the rock surface and the injected water results in enhanced injection pressure. Reducing the thickness of interfacial water film to expand flow radius is a new thought to achieve a decrease in injection pressure. In this work, a hydroxyl-containing cationic surfactant tetradecyl methyl dihydroxy-ethyl ammonium bromide (HTTAB) was designed and synthesized. The introduction of hydroxyl groups enhances the binding to the negatively-charged rock surface. HTTAB can modify the strong hydrophilic rock surface to a hydrophobic state, with the water contact angle increasing from 20.2° to 110.3°. HTTAB shows excellent drag-reducing effect, maintaining a drag reduction rate of over 30 % even after 30 PV of flushing. Particle Image Velocimetry (PIV) experiments show that after HTTAB adsorption, the interfacial slip velocity and centerline velocity can increase by 1.67 times and 33.66 % respectively, and the flow radius expands significantly. In addition, the thickness of the interfacial water film is obtained using Atomic Force Microscope (AFM). The results show that the thickness of the interfacial water film is reduced significantly from 79.42 nm to 8.85 nm. This study provides important guidance for the design of drag-reducing agents and the understanding of interfacial drag-reduction behavior.
研究领域:
石油工程
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Nanjun Lai,Xintong Nie,Xu Zheng,Wensen Zhao,Xubin Zhao,Yong Wang
Acrylamide and dimethyl diallyl ammonium chloride were used as monomers to synthesize a polyelectrolyte molecular deposition film (PMDF) injection agent for solving the problem of high injection pressure of water wells in low-permeability reservoirs. The structure of the PMDF injection agent was determined through IR and 1H nuclear magnetic resonance (NMR). The performance evaluation results show a change of wettability from hydrophilic to neutral wetting with the contact angle changing from 22.32 to 73.31° because of agent injection. It can also change the negative ζ-potential on the surface of the sand to a positive value. For comparison, core displacement experiments involving the commercial Gemini surfactant DF-G reveal that the effects of the depressurization of PMDF are more obvious than those of DF-G. The adsorption stability of the former is better than that of the latter. Especially, under a high-speed water flow of 30 pore volume (PV) injection, the depressurization rate of PMDF is still as high as 43.59%. Finally, the oil–water relative permeability curves and core nuclear magnetic resonance (NMR) experiments demonstrate that the PMDF treatment can reduce the irreducible water saturation, which indicated that the porosity of the flowable part of the core increased and the swept volume was increased. The suitable range of PMDF according to NMR pore-radius distribution within a low-permeability reservoir: the flowable partial pore required the throat radius greater than 0.01 μm.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2017
·Vol. 20
·期 4
·873-880
·
IF 1.45
Zhao Mingwei,Wang Shilu,Dai Caili
Hydrophobic silica nanoparticles were prepared for pressure decreasing in water injection through modification of hydrophilic silica nanoparticles by n -propyltrichlorosilane. Fourier transform infrared spectroscopy analysis and surface hydroxyl number measurement results certified that the modification was very successful. The core flowing experiment showed that the modified hydrophobic silica nanoparticles have an excellent pressure-decreasing ability. The contact angles measurement results showed that the core chip changed from strong water wet to neutral wet after treated by the modified silica nanoparticles. In this work, a roughness decreasing mechanism is proposed to explain the pressure-decreasing mechanism of modified silica nanoparticles. After injection into the core, the modified silica nanoparticles occupied the spaces between the sand grains, forming a discontinuous hydrophobic film on the flowing channel surface. This can not only partially change the wettability of the sand surface, but also decrease the roughness of the core flowing channel, decreasing the critical layer thickness and flowing pressure accordingly.
研究领域:
材料科学
·
化学工程
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jie Yang,Xu Zhao,Li-Xia Yan,Li-Jian Chen,Xiu-Ping Yan
Water-injected meat leads to microbial growth, which affects the health of consumers. A colorimetric porous polymer microneedle patch was designed and prepared using photopolymerization of an acrylate monomer with porogen to be the substrate, and cobalt (II) chloride as color change indicator and tartrazine as the reference. The color of the microneedle patch changed from green to yellow green and to yellow as the increase of moisture concentration. Furthermore, the discoloration trend of the microneedle patch during the moisture measurement of meat is very regular. The moisture measurement of meat in range of 66.9 %–75.7 % exhibited a good linear dependence on RGB values. The results indicate that the microneedle patch can visually determine the moisture content of meat in 3 min. In addition, the microneedle patch can be combined with smartphone to achieve accurate detection of water-injected meat, making it a wonderful tool in the field of food safety testing.
研究领域:
食品科学
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 17
·4163
·
IF 3.2
Fei Gao,Peng Xu,Yongqing Zhang,Hui Zhang
To address scaling issues in oilfield water injection, a degradable terpolymer scale inhibitor MA-AA-AMPS (terpolymer)was synthesized via aqueous solution polymerization using maleic anhydride, acrylic acid, and 2-acrylamido-2-methylpropanesulfonic acid as monomers. Characterization confirmed the presence of carboxyl, sulfonic, and amide groups in the copolymer with good thermal stability. Scale inhibition tests showed that at 2% dosage, its scale inhibition efficiency exceeded 80%, remaining above 80% in the pH range of 3–8 and over 50% at 150 °C, with excellent tolerance to high-calcium environments. Biodegradation tests revealed BOD5/COD > 0.3, with a biodegradation rate exceeding 50% in 15 days and reaching 83.4% in 30 days, indicating environmental friendliness. This scale inhibitor effectively solves scaling problems in oilfield water injection systems.
研究领域:
石油工程
·
高分子化学
·
环境科学
·
阻垢技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
·
IF 6.064
Jiawei Liu,Lin Li,Zhongzheng Xu,Yongpeng Sun,Yining Wu,Caili Dai
Fracture conformance control in reservoir can effectively improve water channel to increase crude oil displacement efficiency of subsequent waterflooding. Inspired by the remarkable underwater wet adhesion of mussel byssus, hydrogel particles which can adhere stably on the fracture rock surface in reservoir conditions could achieve long-lasting reservoir control effect. In this work, the size-controllable biomimetic functional hydrogel particles were prepared by mechanical shearing after bulk hydrogel was constructed by catechol-functionalized polyacrylamide and phenolic resin crosslinking agent. The influence of solution salinity on the aggregation and adhesion of hydrogel particles was investigated via scanning electron microscope (SEM), colloidal probe atomic force microscope (AFM) and quartz crystal microbalance with dissipation (QCM-D). The results showed that hydrogel particles maintained well-dispersed state in low-salinity water, while exhibited significant adhesion and adsorption capacity to the silica surface in simulated reservoir salinity water. This is of great importance to the practical applications that the hydrogel particles would not show enhanced adhesion to rock surfaces until the reservoir salinity water was met, which was beneficial to the in-depth migration of hydrogel particles to achieve effective deep reservoir profile control. Furthermore, the visible micro-model was designed and applied to evaluate profile control effect of hydrogel particles, and the results showed that hydrogel particles could withstand water flushing and adhere stably to the fracture surface. The waterflooding sweep efficiency was increased remarkably from 20.3% ± 2.0% to 38.8% ± 2.0%. This work would help better understand the function mechanism of hydrogel particles in reservoir control and provide novel and efficient method for the practical application in enhanced oil recovery.
研究领域:
材料科学
·
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
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