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A novel dandelion-based bionic proppant and its transportation mechanism in different types of fractures

petroleum Science 2024年第4期21卷 2583-2599页

作者： Jun Li Ming-Yi Wu Xu Han Si-Yuan He Ze-Yu Lin State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Sichuan Particles Energy and Technology co. Ltd Chongqing industry Polytechnic co.lege petroleum Systems Engineering Faculty of Engineering and Applied Science University of Regina

Low-permeability reservoirs are generally characterized by low porosity and low permeability. Obtaining high production using the traditional method is technologically challenging because it yields a low reservoir reco.ery factor. In recent years, hydraulic fracturing technology is widely applied for efficiently exploiting and developing low-permeability reservoirs using a low-visco.ity fluid as a fracturing ***, the transportation of the proppant is inefficient in the low-visco.ity fluid, and the proppant has a low piling-up height in fracture channels. These key challenges restrict the fluid(natural gas or oil) flow in fracture channels and their functional flow areas, reducing the profits of hydrocarbon *** study aimed to explore and develop a novel dandelion-bionic proppant by modifying the surface of the proppant and the fiber. Its structure was similar to that of dandelion seeds, and it had high transport and stacking efficiency in low-visco.ity liquids co.pared with the traditional ***, the transportation efficiency of this newly developed proppant was investigated experimentally using six different types of fracture models(tortuous fracture model, rough fracture model,narrow fracture model, co.plex fracture model, large-scale single fracture model, and small-scale single fracture model). Experimental results indicated that, co.pared with the traditional proppant, the transportation efficiency and the packing area of the dandelion-based bionic proppant significantly improved in tap water or low-visco.ity fluid. co.pared with the traditional proppant, the dandelionbased bionic proppant had 0.1-4 times longer transportation length, 0.3-5 times higher piling-up height, and 2-10 times larger placement area. The newly developed proppant also had some other extraordinary features. The tortuosity of the fracture did not influence the transportation of the novel proppant. This proppant co.ld easily enter the branch fracture and n

关键词： Dandelion-based bionic proppant Low-visco.ity fracturing fluid Unco.ventional reservoir Volumetric fracturing stimulation

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Pilot Test of Preparing 2-Alkylanthraquinone Using Alkylation-Oxidation Technology

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China petroleum Processing & Petrochemical Technology 2024年第1期26卷 88-97页

作者： Zheng Bo Qian Jianguo Shi Peng Pan Zhiyong Qie Siyuan Zhang Yueqin Fei Jianqi Qiao Liang Zong Baoning SINOPEC Research Institute of petroleum Processing co. LtdBeijing 100083 Shijiazhuang United Petrochemical co. LtdShijiazhuang 050011

To expedite the development of industrial technology for producing 2-alkylanthraquinone,a novel pilot test of alkylation-oxidation technology was *** process mainly included anthracene alkylation,separation of anthracene and 2-alkylanthracene,oxidation of 2-alkylanthracene,and product *** alkylation co.ditions yielded a 91.1%co.version of anthracene and a 71.73%selectivity for *** address the separation problem of anthracene and 2-alkylanthracene,solvent-assisted distillation technology was developed,resulting in a 98.9%purity of 2-alkylanthracene and a 91.82%separation *** the molar ratio of H2O_(2) to 2-alkylanthracene was 7:1,a 98.96%co.version of 2-alkylanthracene and a 99.94%selectivity for 2-alkylanthraquinone were achieved.A novel co.position of 2-alkylanthraquinone,including 2-tert-butylanthraquinone,2-tert-amylanthraquinone,and 2-hexylanthraquinone,was *** co.position co.ld be effectively separated and purified through a co.bination of crystallization and washing *** elemental co.position of the product met the existing standards,and its hydrogenation performance closely matched that of co.mercially available 2-tert-amylanthraquinone products.

关键词： anthracene 2-alkylanthracene 2-alkylanthraquinone alkylation oxidation hydrogen peroxide

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Novel Method for Evaluating the Aging of Aviation Turbine Engine Oils via High-Temperature Bearing Deposit Tests

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China petroleum Processing & Petrochemical Technology 2024年第1期26卷 67-77页

作者： Hao Lichun Yang He Song Haiqing Zhou Yunfan He Jingjian Liang Yuxiang SINOPEC Research Institute of petroleum Processing co. Ltd.Beijing 100083

Aviation turbine engine oils require excellent thermal-oxidative stability because of their high-temperature ***-temperature bearing deposit testing is a mandatory method for measuring the thermal-oxidative performance of aviation lubricant oils,and the relevant apparatus was improved in the present *** different co.mercial aviation turbine engine oils were tested,one with standard performance(known as the SL oil)and the other with high thermal stability,and their thermal-oxidative stability characteristics were *** 100 h of high-temperature bearing testing,the SL oil was analyzed by using various analytical techniques to investigate its thermal-oxidative process in the bearing test,with its thermal-oxidative degradation mechanism also being *** results indicate that the developed high-temperature bearing apparatus easily meets the test requirements of method 3410.1 in standard *** visco.ity and total acid number(TAN)of the SL oil increased with the bearing test time,and various deposits were produced in the bearing test,with the micro-particles of the carbon deposits being sphere-like,rod-like,and sheet-like in *** antioxidant additives in the oil were co.sumed very rapidly in the first 30 h of the bearing test,with N-phenyl-1-naphthylamine being co.sumed faster than ***,the oil thermal-oxidative process involves very co.plex physical and chemical mechanisms.

关键词： aviation turbine engine oil high-temperature bearing deposit test thermal-oxidative degradation antioxidant additives

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co.trollable co.densation of Aromatics and Its Mechanisms in Carbonization

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China petroleum Processing & Petrochemical Technology 2024年第1期26卷 34-46页

作者： Fan Xi Wang Chunlu Luo Yang Ren Qiang Shen Haiping Long Jun Sinopec Research Institute of petroleum Processing co. Ltd.Beijing 100083China

In order to obtain liquefied products with higher yields of aromatic molecules to produce mesophase pitch,a good understanding of the relevant reaction mechanisms is *** molecular dynamics simulations were used to study the thermal reactions of pyrene,1-methylpyrene,7,8,9,10-tetrahydrobenzopyrene,and mixtures of pyrene with 1-octene,cyclohexene,or *** reactant co.version rates,reaction rates,and product distributions were calculated and co.pared,and the mechanisms were analyzed and *** results demonstrated that methyl and naphthenic structures in aromatics might improve the co.version rates of reactants in hydrogen transfer processes,but their steric hindrances prohibited the generation of high *** naphthenic structures co.ld generate more free radicals and presented a more obvious inhibition effect on the co.densation of polymers co.pared with the methyl side *** was disco.ered that when different olefins were mixed with pyrene,1-octene primarily underwent pyrolysis reactions,whereas cyclohexene mainly underwent hydrogen transfer reactions with pyrene and styrene,mostly producing superco.jugated biradicals through co.densation reactions with *** the mixture systems,the olefins scattered aromatic molecules,hindering the formation of pyrene trimers and higher *** to the reactive molecular dynamics simulations,styrene may enhance the yield of dimer and enable the co.trolled polyco.densation of pyrene.

关键词： carbonization co.trollable co.densation aromatics mechanisms molecular simulation

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A molecular insight into co.e formation process of vacuum residue in thermal cracking reaction

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petroleum Science 2024年第3期21卷 2130-2138页

作者： Ji-Guang Li Xin Guo Huan-Di Hou Heavy Oil Processing Department Sinopec Research Institute of Petroleum Processing Co.LtdBeijing100083China

Understanding the co.ing behaviors has been co.sidered to be really essential for developing better vacuum residue processing technologies.A battery of thermal cracking tests of typical vacuum residue at 410℃ with various reaction time were performed to evaluate the co.e formation *** total yields of ideal co.ponents including naphtha,atmospheric gas oil(AGO)and vacuum gas oil(VGO)of thermal cracking reactions increased from 10.89%to 40.81%,and the co.version ratios increased from8.05%to 43.33%with increasing the reaction time from 10 to 70 *** asphaltene co.tent increased from 12.14%to a maximum of 22.39%and then decreased,and this maximum of asphaltene co.tent occurred at the end of the co.ing induction *** asphaltenes during the co.ing induction period,at the end and after co.ing induction period of those tested thermal cracking reactions were characterized to disclose the structure changing rules for co.e formation process,and the co.e formation pathways were discussed to reveal the co.e formation process at molecular level.

关键词： Vacuum residue Thermal cracking Asphaltene co.ing induction period Sulfur Nitrogen

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Interpretation and characterization of rate of penetration intelligent prediction model

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petroleum Science 2024年第1期21卷 582-596页

作者： Zhi-Jun Pei Xian-Zhi Song Hai-Tao Wang Yi-Qi Shi Shou-Ceng Tian Gen-Sheng Li co.lege of petroleum Engineering China University of Petroleum(Beijing)Beijing102249China State Key Laboratory of petroleum Resources and Prospecting Beijing102249China Kunlun Digital Technology co. Ltd.Beijing102206China

Accurate prediction of the rate of penetration(ROP)is significant for drilling *** the intelligent ROP prediction model based on fully co.nected neural networks(FNN)outperforms traditional ROP equations and machine learning algorithms,its lack of interpretability undermines its *** study proposes a novel interpretation and characterization method for the FNN ROP prediction model using the Rectified Linear Unit(ReLU)activation *** leveraging the derivative of the ReLU function,the FNN function calculation process is transformed into vector *** FNN model is linearly characterized through further simplification,enabling its interpretation and *** proposed method is applied in ROP prediction scenarios using drilling data from three vertical wells in the Tarim *** results demonstrate that the FNN ROP prediction model with ReLU as the activation function performs exceptionally *** relative activation frequency curve of hidden layer neurons aids in analyzing the overfitting of the FNN ROP model and determining drilling data *** the well sections with similar drilling data,averaging the weight parameters enables linear characterization of the FNN ROP prediction model,leading to the establishment of a co.responding linear representation ***,the quantitative analysis of each feature's influence on ROP facilitates the proposal of drilling parameter optimization schemes for the current well *** established linear characterization equation exhibits high precision,strong stability,and adaptability through the application and validation across multiple well sections.

关键词： Fully co.nected neural network Explainable artificial intelligence Rate of penetration ReLU active function Deep learning Machine learning

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co.bined Promoting Effects of Specific Organic Functional Groups and Alumina Surface Characteristics for the Design of a Highly Efficient NiMo/Al_(2)O_(3) Hydrodesulfurization Catalyst

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China petroleum Processing & Petrochemical Technology 2024年第1期26卷 1-11页

作者： Li Huifeng Li Mingfeng Zhang Le Wang Wei Nie Hong National Energy R&D Center of petroleum Refining Technology SINOPEC Research Institute of Petroleum Processing Co.Ltd.Beijing 100083China

To prepare a highly efficient NiMo/Al_(2)O_(3) hydrodesulfurization catalyst,the co.bined effects of specific organic functional groups and alumina surface characteristics were ***,the co.relation between the surface characteristics of four different alumina and the existing Mo species states was *** was found that the Mo equilibrium adsorption capacity can be used as a specific descriptor to quantitatively evaluate the changes in surface characteristics of different alumina.A lower Mo equilibrium adsorption capacity for alumina means weaker metal-support interaction and the loaded Mo species are easier to transform into ***,the Mo-O-Al bonds still exist at the metal-support *** introduction of cationic surfactant hecadecyl trimethyl ammonium bromide(CTAB)can further improve Mo species dispersion through electrostatic attraction with Mo anions and interaction of its alkyl chain with the alumina surface;meanwhile,the introduction of ethylenediamine tetraacetic acid(EDTA)can co.plex with Ni ions to enhance the Ni-promoting effect on ***,the NiMo catalyst designed using alumina with lower Mo equilibrium adsorption capacity and the simultaneous addition of EDTA and CTAB exhibits the highest hydrodesulfurization activity for 4,6-dimethyl dibenzothiophene because of its proper metal-support interaction and more well-dispersed Ni-Mo-S active phases.

关键词： alumina Mo equilibrium adsorption capacity organic functional groups metal-support interaction hydrodesulfurization

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Advances in Polymeric Carbon Nitride Photocatalysts for Enhanced co.(2)Reduction

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China petroleum Processing & Petrochemical Technology 2024年第2期26卷 1-12页

作者： Liu Bing Sun Shangco.g Song Ye Peng Bo Lin Wei SINOPEC Research Institute of petroleum Processing co. Ltd.Beijing100083China

Photocatalysis has emerged as a promising alternative for co.verting and utilizing co.(2).Polymeric carbon nitride(PCN),typically synthesized through the one-step thermal polyco.densation of nitrogen-rich precursors,has shown co.siderable promise due to its adjustable band structure and inherent *** the past five years,significant literature in this field has identified five primary methods for modifying PCN:morphology modulation,element doping,defect induction,co.catalyst loading,and heterojunction co.struction.A detailed discussion on how each modification method influences light absorption,charge separation,and surface reaction efficiencies in photocatalysis is *** on these findings,several future directions for the development of PCN-based materials are proposed,such as designing tailored PCN structures for specific photocatalytic reactions and using theoretical calculations to verify and co.rect results from current characterization *** the challenges associated with the large-scale synthesis of PCN materials with co.trollable structures and satisfactory performance,this work offers valuable insights for advancing photocatalytic PCN-based systems for large-scale solar fuel production.

关键词： carbon nitride photocatalysis co.(2)reduction modification

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Measurement and co.relation of Liquid-liquid Equilibria for 1-Hexene-n-Hexane-3-Methysulfolane

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China petroleum Processing & Petrochemical Technology 2024年第2期26卷 81-87页

作者： Ma Rui Tian Longsheng Zhao Ming Yang Mingke Qie Siyuan SINOPEC Research Institute of petroleum Processing co. Ltd.Beijing 100083China

Utilizing solvent extraction to separate alkanes and olefins from catalytic light gasoline is an effective method for maximizing the utility of gasoline *** study presents the determination of liquid-liquid equilibrium data for the ternary system of 1-hexene-n-hexane-3-methylsulfolane at 30℃,40℃,and 50℃under atmospheric *** obtained data facilitated the co.struction of a ternary phase diagram for the *** results showed that the extraction selectivity of 1-hexene/n-hexane exceeded 1.5 when using 3-methylsulfolane as the extraction ***,the thermodynamic co.sistency of the experimental data was examined using Hand’s equation and the Othmer-Tobias *** co.relation co.fficient,R^(2)≥0.9578,indicated the acceptable reliability of the phase equilibrium ***,the NRTL(non-random two liquid)model was used to co.relate the liquid-liquid phase equilibrium data and derive the binary interaction ***,the results demonstrated that the root mean square deviation of the NRTL model co.relation values from the experimental values did not exceed 2.5%.

关键词： liquid-liquid phase equilibrium 1-hexene n-hexane 3-methylsulfolane NRTL

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Effect of the Particle Packing co.figuration on Fixed Bed Performance

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China petroleum Processing & Petrochemical Technology 2024年第1期26卷 152-160页

作者： Li Ziqi Bao Di Zhou Han Tang Xiaojin SINOPEC Research Institute of petroleum Processing co. Ltd.Beijing 100083China

Fixed-bed reactors are generally co.sidered the optimal choice for numerous multi-phase catalytic reactions due to their excellent performance and ***,co.ventional fixed beds often enco.nter challenges related to inadequate mass transfer and a high pressure drop caused by the non-uniform void fraction *** enhance the overall performance of fixed beds,the impact of different packing co.figurations on performance was *** and simulation methods were used to investigate the fluid flow and mass transfer performances of various packed beds under different flow *** was found that structured beds exhibited a significantly lower pressure drop per unit length than co.ventional packed ***,the packing co.figurations had a critical role in improving the overall performance of fixed ***,structured packed beds,particularly the H-2 packing co.figuration,effectively reduced the pressure drop per unit length and improved the mass transfer *** H-2 packing co.figuration co.sisted of two parallel strips of particles in each layer,with strips arranged perpendicularly between adjacent layers,and the spacing between the strips varied from layer to layer.

关键词： packing co.figurations fixed bed co.putational Fluid Dynamics simulation pressure drop mass transfer

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