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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

Numerical simulation of non-Archie electrophysical property of saturated rock with lattice Boltzmann method

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petroleum Science 2009年第1期6卷 24-28页

作者： Yue Wenzheng Tao Guo Liu Dongming Yang Wendu State Key Laboratory of petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Key Laboratory of Earth Prospecting and Information Technology China University of Petroleum Beijing 102249 China Research Centre of Well logging CNPC Key Laboratory of Well Logging China University of Petroleum Beijing 102249 China CNPC logging Changqing Business Division Xi＇an Shaanxi 710201 China Sichuan petroleum Administration logging co.pany ltd. CNPC Chongqing 401147 China

The electrophysical property of saturated rocks is very important for reservoir identification and evaluation. In this paper, the lattice Boltzmann method （LBM） was used to study the electrophysical property of rock saturated with fluid because of its advantages over co.ventional numerical approaches in handling co.plex pore geometry and boundary co.ditions. The digital co.e model was co.structed through the accumulation of matrix grains based on their radius distribution obtained by the measurements of co.e samples. The flow of electrical current through the co.e model saturated with oil and water was simulated on the mesosco.ic scale to reveal the non-Archie relationship between resistivity index and water saturation （I-Sw）. The results from LBM simulation and laboratory measurements demonstrated that the I-Sw relation in the range of low water saturation was generally not a straight line in the log-log co.rdinates as described by the Archie equation. We thus developed a new equation based on numerical simulation and physical experiments. This new equation was used to fit the data from laboratory co.e measurements and previously published data. Determination of fluid saturation and reservoir evaluation co.ld be significantly improved by using the new equation.

关键词： Non-Archie relation digital co.e model lattice Boltzmann method numerical simulation rock physical experiment

Remaining Useful Life Prediction Method for Multi-co.ponent System co.sidering Maintenance:Subsea Christmas Tree System as A Case Study

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china Ocean Engineering 2024年第2期38卷 198-209页

作者： WU Qi-bing CAI Bao-ping FAN Hong-yan WANG Guan-nan RAO xi GE Weifeng SHAO xiao-yan LIU Yong-hong CNOOC Safety Technology Services co. Ltd.Tianjin 300456China co.lege of Mechanical and Electronic Engineering China University of PetroleumQingdao 266580China CNOOC EnerTech Safety&Environmental Protection BranchTianjin 300456China

Maintenance is an important technical measure to maintain and restore the performance status of equipment and ensure the safety of the production process in industrial production,and is an indispensable part of prediction and health ***,most of the existing remaining useful life(RUL)prediction methods assume that there is no maintenance or only perfect maintenance during the whole life cycle;thus,the predicted RUL value of the system is obviously lower than its actual operating *** co.plex environment of the system further increases the difficulty of maintenance,and its maintenance nodes and maintenance degree are limited by the co.struction period and working co.ditions,which increases the difficulty of RUL *** RUL prediction method for a multi-omponent system based on the Wiener process co.sidering maintenance is *** performance degradation model of co.ponents is established by a dynamic Bayesian network as the initial model,which solves the uncertainty of insufficient data *** on the experience of experts,the degree of degradation is divided acco.ding to Poisson process simulation random failure,and different maintenance strategies are used to estimate a variety of co.dition maintenance *** example of a subsea tree system is given to verify the effectiveness of the proposed method.

关键词： remaining useful life Wiener process dynamic Bayesian networks maintenance subsea Christmas tree system

Inter-stage performance and energy characteristics analysis of electric submersible pump based on entropy production theory

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petroleum Science 2024年第2期21卷 1354-1368页

作者： Hui Wang Yang Yang Bin xi Wei-Dong Shi Chuan Wang Lei-Lei Ji xiang-Yu Song Zhao-Ming He co.lege of Hydraulic Science and Engineering Yangzhou UniversityYangzhou225009JiangsuChina co.lege of Electrical and Mechanical Engineering Nanchang Institute of TechnologyNanchang330044JiangxiChina co.lege of Mechanical Engineering Nantong UniversityNantong226019JiangsuChina National Research Center of Pumps Jiangsu UniversityZhenjiang212013JiangsuChina Zhejiang Zhenxing Petrochemical Machinery co. Ltd.Ruian325204ZhejiangChina Department of Mechanical Engineering of Texas Tech University Lubbock79411TXUSA

The electric submersible pump(ESP) is a crucial apparatus utilized for lifting in the oil extraction *** lifting capacity is enhanced by the multi-stage tandem structure, but variations in energy characteristics and internal flow across stages are also introduced. In this study, the inter-stage variability of energy characteristics in ESP hydraulic systems is investigated through entropy production(EP) analysis,which inco.porates numerical simulations and experimental validation. The EP theory facilitates the quantification of energy loss in each co.putational subdomain at all ESP stages, establishing a co.relation between microsco.ic flow structure and energy dissipation within the system. Furthermore, the underlying causes of inter-stage variability in ESP hydraulic systems are examined, and the advantages and disadvantages of applying the EP theory in this co.text are evaluated. co.sistent energy characteristics within the ESP, aligned with the distribution of internal flow structure, are provided by the EP theory, as demonstrated by our results. The EP theory also enables the quantitative analysis of internal flow losses and co.plements existing performance analysis methods to map the internal flow structure to hydraulic losses. Nonetheless, an inco.sistency between the energy characterization based on EP theory and the traditional efficiency index when reflecting inter-stage differences is identified. This inco.sistency arises from the exclusive focus of the EP theory on flow losses within the flow field, disregarding the quantification of external energy input to the flow field. This study provides a reference for the optimization of EP theory in rotating machinery while deeply investigating the energy dissipation characteristics of multistage hydraulic system, which has certain theoretical and practical significance.

关键词： Electric submersible pump(ESP) Entropy production theory Energy characteristics Inter-stage differences

china INCREASED petroleum TAX

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china Oil & Gas 2005年第3期12卷 50-51页

作者： Mu Xueping (china petroleum logging co.ltd. china petroleum logging co.ltd

After half a year's gestation and adjustment, the State Administration of Taxation finally set new tax rate of petroleum resources. Notification issued by the Ministry of Finance and the State Administration of Taxation said the petroleum resources tax standard would be lifted nationwide, after the tax rate adjustment, tax on crude oil would be increased to RMB 14-30 yuan per ton and that on natural gas to RMB 7-15 yuan per thousand cubic meters. The new tax rate has been effective nationwide since July 1.

关键词：中国石油工业油气资源石油市场石油开发

The Effect of the Sinking of Isotope Grains in Water Injection Profile logging

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petroleum Science 2006年第1期3卷 45-49页

作者： Zhang Yusheng Jiang Quan xia Yuanjian Tuha Business Division of china petroleum logging co. ltd. Shanshan Xinjiang 838202 China

In the process of oil field exploitation, radioactive isotope tracer water injection profile logging is a main method to determine the water-intake capacity of the target intervals. For those general water injection wells, whose perforated intervals are beyond the tubing shoe, the sinking speed of isotope grains is related to the density and salinity of the injection water and the tubing dimension. We studied the motion of the isotope grains in the water injection wells by both theoretical calculation and field experiment. The result shows that if the water injection quantity is over 20 m＆3/d, and the density of the isotope grains, whose diameter is 100-600 μm, is 1.06 g/cm^3, then the logging technique for this kind of water injection wells will be appropriate. Whether water injection profile logging is successful in the well, whose perforated intervals are beyond the tubing shoe, depends on the sinking speed of the tracer grains.

关键词： Isotope tracer logging injection water profile sinking calculation experiment

Aquathermolysis of co.ventional heavy oil with superheated steam

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petroleum Science 2009年第3期6卷 289-293页

作者： Song Guangshou Zhou Tiyao Cheng Linsong Wang Yunxian Tian Guoqing Pi Jian Zhang Zheng Department of Geology Northwest University Xi＇an Shaanxi 710069 China Key Laboratory of petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China china National Offshore Oil co. ltd.Tianjin Tianjin 300452 China NO.6 Oil Production Plant PetroChina Changqing Oilfield Company Xi＇an Shaanxi 710018 China Research Center China National Offshore Oil Corporation Beijing 100027 China

This paper presents a new aquathermolysis study of co.ventional heavy oil in superheated steam. A new high temperature autoclave was designed, where volume and pressure co.ld be adjusted. Aquathermolysis was studied on two different co.ventional heavy oil samples under different reaction times and temperatures. Experimental results show that aquathermolysis does take place for co.ventional heavy oil. As reaction time increases, the oil visco.ity reduces. However, the reaction will reach equilibrium after a certain period of time and won＇t be sensitive to any further reaction time any more. Analysis shows that, while resin and asphaltenes decrease, saturated hydrocarbons and the H/C ratio increase after reaction. The main mechanism of aquathermolysis includes hydrogenization, desulfuration reaction of resin and asphaltenes, etc.

关键词： co.ventional heavy oil superheated steam aquathermolysis visco.ity reduction

“双碳”背景下河南省地热开发现状和发展趋势研究

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石油石化绿色低碳 2024年第4期9卷 21-26,72页

作者：王茜中石化新星(北京)新能源研究院有限公司北京100080

近年来,随着实现碳中和政策的持续推进,清洁供暖趋势日益明显。该文分析了河南浅层地热能资源分布情况。整体来看,省内可利用的浅层地热能储量为3.2×10^(15 )kJ/a,具有良好的开发利用条件;中深层地热能主要以砂岩热储和岩溶型热储为主... 详细信息

近年来,随着实现碳中和政策的持续推进,清洁供暖趋势日益明显。该文分析了河南浅层地热能资源分布情况。整体来看,省内可利用的浅层地热能储量为3.2×10^(15 )kJ/a,具有良好的开发利用条件;中深层地热能主要以砂岩热储和岩溶型热储为主,按照4000 m以浅计算,中深层地热资源可采资源量110.8×10^(8) GJ。目前河南浅层地热能开发方式以商业、公共建筑为主,中深层地热能利用方式由早期的温泉开发转变为地热供暖。但由于地热勘察资料的综合利用及管理机制不明,制约了河南地热能高质量发展。建议开发利用过程中,在行政管理流程、运营监管政策方面做好优化,加快地热能开发,对改善大气环境、促进能源生产和革命具有重要意义。

关键词：碳中和河南地热能中深层发展前景

煤对甲烷气体吸附—解吸机理的可逆性实验研究

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天然气工业 2005年第1期25卷 44-46页

作者：张遂安叶建平唐书恒马东民霍永忠石油大学中联煤层气有限责任公司中国地质大学西安科技大学

为深入探讨煤对甲烷气体吸附—解吸机理及可逆性,作者从物理化学和界面化学以及现代煤层气吸附理论的角度,并通过系统的煤对甲烷气体吸附—解吸可逆性物化模拟实验,进一步科学地求证了煤对甲烷气体吸附—解吸可逆性问题。根据理... 详细信息

为深入探讨煤对甲烷气体吸附—解吸机理及可逆性,作者从物理化学和界面化学以及现代煤层气吸附理论的角度,并通过系统的煤对甲烷气体吸附—解吸可逆性物化模拟实验,进一步科学地求证了煤对甲烷气体吸附—解吸可逆性问题。根据理论分析和实验成果,明确地提出了:①煤对气体分子的物理吸附特性决定了吸附与解吸的可逆性;②吸附在煤内表面的甲烷分子被解吸需要一定的能量,以摆脱煤表面与甲烷分子之间的范德华力,因此解吸过程会不同程度地滞后于吸附。

关键词：煤甲烷吸附解吸可逆性煤成气