Materia-Rio de Janeiro
·
2025
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IF 1.2
Yu Meng,Xu Guorui,Li Liang,Zhou Jingjing,Tie Leilei,Zhang Bo,Ma Xiaofei,Feng Xuan,Yang Jinzhou,Wang Lei,Li Weizhi,Zheng Yufei,Wu Bao
VISUAL
研究领域:
石油工程
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油田化学
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提高采收率
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油藏工程
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产品关联
DOI
高影响因子
Processes
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2024
·Vol. 12
·期 4
·791
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IF 2.8
Jiani Hu,Meilong Fu,Minxuan Li,Yuting Luo,Shuai Ni,Lijuan Hou
In view of the high salinity characteristics of reinjection oilfield wastewater in the Gasi Block of Qinghai Oilfield, with the polymer produced by Shandong Baomo as the research target, we systematically investigated the variations in the impact of six ions, Na+, K+, Ca2+, Mg2+, Fe2+, and Fe3+, in the produced water from polymer flooding on the viscosity and stability of the polymer solution. Additionally, we provided the primary research methods for complexation in reinjected wastewater. Experimental results indicate that the main factors leading to a decrease in polymer viscosity are high-valence cations, with the descending order of their influence being Fe2+> Fe3+> Mg2+> Ca2+> Na+> K+. High-valent cations also effect the viscosity stability of polymer solutions, and their order from greatest to least impact is: Fe2+> Ca2+(Mg2+) > Fe3+> Na+(K+). This article is focused on investigating the influencing factors and extent of the impact of oilfield wastewater on the viscosity of polymer solutions. It illustrates the response mechanism of cations to the viscosity of polymer solutions in reinjection wastewater polymerization. Through this research, the goal is to provide reference control indicators and limits for the water quality of injected polymers at oilfield sites. This ensures the stability and controllability of polymers in field applications and offers theoretical guidance for polymer flooding technology.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yun Cheng,Miaomiao Hu,Jie Cao,Long Zang,Pengpeng Li,Hang Zhang,Qinglu Chang,Jintang Guo
Preformed particle gels (PPGs) have extensive application potential for reducing excess water content in reservoirs due to their adaptability, stability, and deformability. However, the mechanical properties of conventional PPGs are poor, and the swollen particles are susceptible to damage when passing through formation fractures. In this paper, a novel methacrylated crosslinking agent (ChMA) was prepared and cross-linked with functional monomers to form the first hydrogel network, and then the ChMA crosslinking based double network structure hydrogels (CBDCH) were prepared by stepwise modification via tannic acid (TA). TA forms hydrogen bonds with amino, carboxyl, or sulfonic groups in the hydrogel through its phenolic hydroxyl groups, thereby promoting the formation of a physical crosslinked network. The CBDCH with double network structure exhibited excellent rheological and mechanical properties, including excellent elastic modulus (12,041 Pa), high strength (0.124 MPa) and high toughness (1.63 MJ m −3 ). In addition, the thermal stability of CBCH and CBDCH hydrogels were tested at different temperatures and salinities. The results showed that the CBDCH hydrogel has excellent thermal stability and better swelling properties at high temperature and high salt (10.29 at 120 °C). A core drive test was conducted on naturally fractured cores, and the results indicated that at a water injection flow rate of 0.5 mL/min, the breakthrough pressure of CBDCH was 180 psi/ft, demonstrating a significant blocking effect that meets the fundamental standards for water plugging in oilfields. This study highlights the potential of incorporating a dual network structure into PPGs to develop tough, temperature-resistant, and salt-resistant water-plugging materials.
研究领域:
材料科学
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石油工程
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DOI
高影响因子
Petroleum Science
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2022
·
IF 4.757
Tian-Ci Zhang,Ji-Jiang Ge,Hao Wu,Hong-Bin Guo,Bao-Lei Jiao,Zhen Qian
The BST oilfield in the northwestern Taklamakan Desert is a fractured carbonate reservoir, but issues of water breakthrough are becoming increasingly severe with the development of water flooding. Unfortunately, the high-temperature and high-salt conditions (130 °C, 71695 mg/L) of the BST oilfield pose challenges for the development of plugging agents. In this study, the effects of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) content on AM/AMPS copolymers and gels were studied through viscosity measurements, nuclear magnetic resonance (NMR), and cryo-scanning electron microscope (Cryo-SEM). Moreover, the AMPS stabilization mechanism of the polymers and gels was explained. Heat-resistant and salt-tolerant gel systems were developed, and their gelation properties, thermal stability, injection capacity, and plugging ability were evaluated. Experimental results showed inconsistencies between the effects of AMPS content on the polymers and gels. For the polymers, the thermal stability increased with increased AMPS content in the polymer. However, excessive AMPS content resulted in poor gelation and low strength. The developed gel systems with S30 polymer (AMPS content is approximately 26%) exhibited excellent thermal stability, controllable gelation time, good injection capacity, and plugging ability. The field application results indicated that most production wells had a positive response, with reduced water-cut and increased daily oil production.
研究领域:
石油工程
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材料科学
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DOI
高影响因子
Petroleum
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2021
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IF 0
Heng Wang,Junying Hu,Zhi Yang,Zebin Yin,Qi Xiong,Xiankang Zhong
A highly efficient and environment-friendly scale inhibitor (MA-VA-VS) was synthesized via free radical solution polymerization method, where maleic anhydride (MA), vinyl acetate (VA) and vinyl sulfonate (VS) acted as monomers, while ammonium persulfate was used as initiator. The inhibition performance and the structure as well as properties was characterized using static jar measurement and dynamic test, Fourier transform infrared spectroscopy and thermogravimetric analysis. The surface morphology and composition of scale formed in the solution were examined using scanning electron microscopy and X-ray diffraction, respectively. The binding energies of inhibitor with calcite (104) face were calculated using Materials Studio 2017 (MS) at 323 K. The results show that the inhibition efficiency gradually increases with increasing inhibitor concentration. While as the Ca 2+ concentration increases, the efficiency first increases and then decreases. With the increase in temperature or pH, the efficiency generally decreases. It is confirmed that the inhibition efficiency can reach 91.4% when 150 mg/L MA-VA-VS is used in a flow condition. Both the calculated binding energy and inhibition performance evaluation results demonstrate that the scale inhibition performance of MA-VA-VS is better than a commercial scale inhibitor (HPMA). The excellent inhibition performance of this inhibitor is due to its chelation and dispersion properties.
研究领域:
化学工程
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材料科学
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DOI
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Hailin Yu,Huili Zhang,Chunlong Sun,Wen Yuan,Hongliang Li,Wei Jiang,Long Dong,Yingjun Wang,Hongsheng Liu
The complexity of oily sewage from oilfields has risen with the advancement of polymer flooding technology, thereby increasing the treatment challenge. In this study, a composite coagulant, PVPAM-PPFS, was proposed, inspired by octopus tentacles, with PVP as the backbone. FTIR , 1 H NMR and Rg radius of gyration were used to characterize the functional groups and conformation of PVPAM-PPFS in aqueous environments. The composite coagulant exhibits facile dispersion in water. Upon hydrolysis of PVPAM-PPFS, numerous molecular chains resembling octopus tentacles are formed and confirmed through Atomic Force Microscopy (AFM). When applied to oily sewage in oilfields, PVPAM-PPFS demonstrates enhanced interaction with emulsified oil layers, capturing colloidal particles in water and thereby facilitating efficient separation of oil, water, and flocs. Lastly, the mechanism of PVPAM-PPFS was analyzed through a combination of coagulation experiments and detection of floc morphology. PVPAM-PPFS will better interact with colloidal particles in water through increased charge neutralization, bridging adsorption, and sweeping capabilities. Significantly, an enhanced crude oil recovery rate is observed from the recovered oil droplets following the disruption of the emulsion layer.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2017
·Vol. 93
·期 4
·968-974
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IF 3.135
Shuanglei Peng,Guancheng Jiang,Xinliang Li,Lili Yang,Fan Liu,Yinbo He
BACKGROUND Contaminants with either negative or positive surface charges in wastewater generated from oilfields are normally very difficult to remove by traditional flocculants owing to their strong pH-dependence and high health risks. Natural polymer flocculants, especially chitosan-based flocculants, have attracted much interest for their environmental friendliness, excellent flocculation efficiencies and cost-effectiveness. RESULTS A series of amphoteric chitosan-based grafting flocculants (CM-chi)- g -PDMDAAC (denoted as C g PD) were successfully synthesized by grafting diallyl dimethyl ammonium chloride (DMDAAC) onto carboxymethyl chitosan (CM-chi) with different grafting ratios. By carboxymethyl and grafting modification, dramatically increased water solubility of chitosan was obtained. The physicochemical structure of C g PD products was characterized by 1 H NMR and elemental analysis proving that DMDAACC was grafted onto CM-chi appropriately. Flocculation effects of C g PD were studied in kaolin and hematite suspensions having opposite surface charges. These C g PD flocculants demonstrated an excellent performance in respect of flocculation window, optimal dosage and pH sensitivity. In addition, C g PD was proven to be applicable as a flocculant in water treatment of oilfield sites. CONCLUSION The biodegradability flocculants, C g PD, can effectively remove contaminants with opposite surface charges from oilfield wastewater with low optimal dosage, wide flocculation window, low pH sensitivity and less environmental impacts than traditional flocculants. © 2017 Society of Chemical Industry
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Frontiers in Energy Research
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2021
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IF 4.008
Liu Yang,Zhang Yuchen,Xie Tao,Yue Ming,Wang Dongsen,Li Bin
In light of the difficulty of solid-liquid separation of waste PEM drilling fluid in the Bohai oilfield, constructing an inorganic-organic flocculation system is proposed and the processing method of destabilization technology is optimized. The biggest influence factor on the flocculation process of PEM drilling fluid was determined by designing an orthogonal test. The flocculation mechanism was researched through single factor optimization, combined with zeta potential and particle size distribution test. The results showed that the most significant factors affecting the flocculation of waste PEM drilling fluid were the dosage of inorganic flocculant CaCl2 and flocculation pH value. When the dosage of inorganic flocculant CaCl2 was 1.2% (w/v), the dosage of organic flocculant SDYJ-2 was 0.05%, the flocculation pH value was 3, and the flocculation time was 5 min, the flocculation technology reached the optimization and then the liquid yield can reach 70.96%. The mechanism of flocculation and destabilization was as follows: the inorganic flocculant of CaCl2 mainly reduced the zeta potential of clay particles through electric neutralization. 1% CaCl2 could reduce the potential mean value of drilling fluid system from -38.1 mV to -32.5 mV, and then decrease the repulsion among suspensions. Through bridging curling and electric neutralization, the organic flocculant of SDYJ-2 can absorb and wrap the clay particles after flocculation destabilization to form a network spatial structure, which made clay particles aggregate into large flocs and particles. D50 can increase by 21.5 times, when the concentration of SDYJ-2 was 0.15%.
研究领域:
石油工程
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Xin Lv,Shi Shen,Huiyong Liang,Yanzhen Liu,Haiyuan Yao,Rui Qin,Haihong Chen,Yang Ge,Peng Xiao
Throughout the development of deepwater oil and gas fields, the occurrence of mixed deposition involving wax and hydrate is a prevalent phenomenon. To understand this process, researchers have explored the kinetics and thermodynamic behavior governing the co-deposition of wax and hydrates. It was observed that the Gibbs free energy change of hydrate increases with increasing pressure, while the entropy change experiences a decrease under heightened pressure conditions. The Gibbs free energy change and entropy change of wax crystal precipitation exhibit an increase with rising wax concentration. In a 100 mL sample of simulated crude oil containing 10 vol% moisture and 2.5 wt% wax, the rate of solid phase deposition measures 0.1126 cm 3 /min when the temperature drops from 61 °C to 2 °C. The results exhibit that the dispersion of wax crystals within the oil phase serves to inhibit aggregation phenomenon during hydrate formation and can be effectively used to inhibit hydrate deposition.
研究领域:
石油工程
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化学工程
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Fanxi Yang,Jinling Zhang,Jie Pan,Yangli Liu,Yanchong Yu,Shebin Wang
Corrosion is an unavoidable issue that steel encounters during service; however, the generic methods employed for corrosion prevention often need high cost or preparation conditions. In this study, a facile chemical replacement deposition method was proposed to realize an anticorrosion superhydrophobic coating on a X80 steel surface. The growth mechanism of the rough structure and its impact on the wettability of the superhydrophobic coating were analyzed. The superhydrophobic coating, deposited for 50 s and modified for 30 min, achieved optimal electrochemical properties and a maximum water contact angle. The immersion test, in the saturated CO2 oilfield produced water, demonstrated the better corrosion resistance of superhydrophobic coating than X80 steel. Correspondingly, a kinetic corrosion model was established to analyze the anticorrosion mechanism. In summary, this method significantly improves the corrosion resistance of X80 steel and is attractive for other industrial fields.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
Membranes
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2021
·Vol. 11
·期 2
·118
·
IF 4.106
Chunwei Zhang,Menglong Sheng,Yaoqiang Hu,Ye Yuan,Yulong Kang,Xiao Sun,Tao Wang,Qinghua Li,Xisen Zhao,Zhi Wang
CO2enhanced oil recovery (CO2-EOR) technology is a competitive strategy to improve oil field economic returns and reduce greenhouse gas emissions. However, the arbitrary emissions or combustion of the associated gas, which mainly consists of CO2and CH4, will cause the aggravation of the greenhouse effect and a huge waste of resources. In this paper, the high-performance facilitated transport multilayer composite membrane for CO2/CH4separation was prepared by individually adjusting the membrane structure of each layer. The effect of test conditions on the CO2/CH4separation performance was systematically investigated. The membrane exhibits high CO2permeance of 3.451 × 10−7mol·m−2·s−1·Pa−1and CO2/CH4selectivity of 62 at 298 K and 0.15 MPa feed gas pressure. The cost analysis was investigated by simulating the two-stage system. When the recovery rate and purity of CH4are 98%, the minimum specific cost of separating CO2/CH4(45/55 vol%) can be reduced to 0.046$·Nm−3CH4. The excellent short-to-mid-term stability indicates the great potential of large industrial application in the CH4recovery and CO2reinjection from oilfield associated gas.Keywords:oilfield associated gas;CO2capture;multilayer composite membrane;facilitated transport;CO2/CH4separation
研究领域:
化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Hui-Wen Gu,Shan-Hui Zhang,Bai-Chun Wu,Wu Chen,Jing-Bo Wang,Yang Liu
Oil-field wastewaters contain high level of polycyclic aromatic hydrocarbons (PAHs), which have to be analyzed to assess the environmental effects before discharge. In this work, a green fluorimetric detection method that combines excitation-emission matrix (EEM) fluorescence with parallel factor analysis (PARAFAC) algorithm was firstly developed to achieve the direct and simultaneous determination of six U.S. EPA PAHs in two different kinds of complex oil-field wastewaters. Due to the distinctive “second-order advantage”, neither time-consuming sample pretreatments nor toxic organic reagents were involved in the determination. By using the environment-friendly “mathematical separation” of PARAFAC, satisfactory quantitative results and reasonable spectral profiles for six PAHs were successfully extracted from the total EEM signals of oil-field wastewaters without need of chromatographic separation. The limits of detection of six PAHs were in the range of 0.09–0.72 ng mL −1 , and the average spiked recoveries were between (89.4 ± 4.8)% and (109.1 ± 5.8)%, with average relative predictive errors <2.93%. In order to further confirm the accuracy of the proposed method, the same batch oil-field wastewater samples were analyzed by the recognized GC–MS method. t -test demonstrated that no significant differences exist between the quantitative results of the two methods. Given the advantages of green, fast, low-cost and high-sensitivity, the proposed method is expected to be broadened as an appealing alternative method for multi-residue analysis of overlapped PAHs in complex wastewater samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）