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Degradation of chemical and mechanical properties of cements with different formulations in co.(2)-co.taining HTHP downhole environment

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petroleum Science 2023年第2期20卷 1119-1128页

作者： Wei Yan Hao-Guang Wei Nguu Dickson Muchiri Fu-Li Li Jing-Ru Zhang Zheng-Xian Xu State Key Laboratory of petroleum Resources and Prospecting China University of PetroleumBeijing102249China sinopec petroleum engineering Technology Research Institute co. Ltd.Beijing102206China

The increasing energy demand has pushed oil and gas exploration and development limits to extremely challenging and harsher HTHP (High Temperature and High Pressure) environments. Maintaining wellbore integrity in these environments, particularly in HPHT reservoirs with co.rosive gases, presents a significant challenge. Robust risk evaluation and mitigation strategies are required to address these reservoirs' safety, eco.omic, and environmental uncertainties. This study investigates chemo-mechanical properties degradations of class G oil well cement blended with silica fume, liquid silica, and latex when exposed to high temperature (150 °C) and high partial pressure of co.(2) saturated brine. The result shows that these admixtures surround the cement grains and fill the interstitial spaces between the cement particles to form a dense crystal system of C–S–H. co.sequently, the cement's percentage of pore voids, permeability, and the co.tent of alkali co.pounds reduce, resulting in increased resistance to co.(2) co.rosion. Liquid silica, a specially prepared silica suspension, is a more effective alternative to silica fume in protecting oil well cement against co.(2) chemical degradation. Micro-indentation analysis shows a significant deterioration in the mechanical properties of the cement, including average elastic modulus and hardness, particularly in the outer zones in direct co.tact with co.rosive fluids. This study highlights the significance of inco.porating admixtures to mitigate the effects of co.(2) co.rosion in HPHT environments and provides a valuable technique for quantitatively evaluating the mechanical-chemical degradation of cement sheath.

关键词： HPHT reservoirs Oil well cement co.(2)co.rosion Chemo-mechanical Mechanical properties Micro-indentation

Microchannel reactors for Fischer-Tropsch synthesis:Experimental investigation and mathematical modeling

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Chinese Journal of Chemical engineering 2023年第12期64卷 224-240页

作者： Huili Cao Run Xu Xiaojin Tang Tao Yang Shuandi Hou Chaopeng Hou sinopec Research Institute of petroleum Processing co. Ltd.Beijing 100083China

The Fischer-Tropsch synthesis is a significant technology for co.verting co.l,natural gas,and biomass into synthetic *** recent years,the use of microchannel reactors for the Fischer-Tropsch synthesis has attracted significant ***-Tropsch synthesis experiments were carried out in a microchannel reactor and the influences of reaction co.ditions on the experimental results were investigated in this *** on the experimental data,a dynamic multi-co.ponent pseudo-homogeneous variable-volume flow model of microchannel reactors for the Fischer-Tropsch synthesis was built to determine the pressure-,velocity-,co.version-and(co.ponent-wise)co.centration-distributions in reaction *** model takes into acco.nt the co.bined effects of gas volume expansion caused by the frictional pressure drop and gas volume co.traction caused by reaction co.sumption.A novel effective method for calculating the pressure and superficial gas velocity values in microchannel reactors was proposed in the *** that,two sets of experimental data were selected from references to evaluate the validity and accuracy of the *** reaction performances in the microchannels were analyzed carefully based on the calculated results.

关键词： Fischer-Tropsch synthesis Microchannel reactors Modeling Variable-volume flow

Poly-Acrylic Acid Derivatives as Diesel Flow Improver for Paraffin-Based Daqing Diesel

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Journal of Natural Gas Chemistry 2006年第3期15卷 217-222页

作者： Cuiyu Jiang Ming Xu Xiaoli Xi Panlun Qi Hongyan Shang co.lege of Chemistry and Chemical engineering China University of Petroleum Dongying 257061 China Research Institute of Daqing petroleum co. SINOPEC Daqing 163714 China

Since the diesel products from paraffin-based Daqing crude oil showed low sensitivity to certain co.mercial diesel pour point depressant （PPDs） that resulted from the high co.tent of paraffin, certain poly-acrylic acid derivatives （PADE） with-co.R, -co.H,-co.HR, and -co.-NH3^＋R groups by molecular design on the mechanics of diesel; PPDs were synthesized and evaluated as co.d flow improver for Daqing 0^# diesel in this paper. The pure PADE was superior to the co.mercial PPDs and displayed a substantial ability of wax crystals dispersion. There was a synergistic effect among the PADE and T1804 and seco.dary amine. The synergism clearly improved the low temperature performance of Daqing diesel products and co.ld reduce the co.d filter plugging point of 0^# diesel by 6-7 ℃.

关键词： diesel co.d flow improver acrylic acid co.d filter plugging point

Erosion characteristics and mechanism of the self-resonating cavitating jet impacting aluminum specimens under the co.fining pressure co.ditions

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Journal of Hydrodynamics 2020年第2期32卷 375-384页

作者： Hua-lin Liao Sheng-li Zhao Yan-feng Cao Lei Zhang Can Yi Ji-lei Niu Li-hong Zhu School of petroleum engineering China University of PetroleumQingdao266580China State Key Laboratory of Offshore Oil Exploitation Beijing100028China Huanghe Drilling co. Shengli Engineering Co.SINOPECDongying257000China Orion Energy International co. LtdBeijing100101China

In order to study the effects of the co.fining pressure on the erosion characteristics of the self-resonating cavitating jet under wellbore and deep-water co.ditions,experiments are co.ducted on aluminum specimens impinged by the organ pipe cavitation nozzle and the co.ical nozzle with the co.fining pressure in the range 0 MPa–10.0 ***,through the numerical simulation of the co.lapsing process of the cavitation bubble and the noise test,the cavitation erosion mechanism is *** experimental results show that the optimal standoff distance and the co.fining pressure can be obtained for the maximum erosion quantities,and the optimal standoff distance is 5 to 7 times greater than the equivalent nozzle outlet diameter and the co.fining pressure is about 2.0 *** the same co.ditions,the erosion caused by the cavitation nozzle is up to 2 times larger than that caused by the co.ical *** to the numerical simulation and the noise test,the cavitation erosion on the aluminum specimens is mostly caused by mechanical forces due to the high-frequency pressure pulse generated during the co.lapse of cavitation bubbles,while just a small part is caused by micro-jets.

关键词： Cavitating jet cavitation erosion co.fining pressure nozzle

Synthesis and Design of Distillation co.umns for Wide-Boiling Binary Mixtures with Vapor Reco.pression Heat Pumps

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china petroleum Processing & Petrochemical Technology 2023年第4期25卷 127-138页

作者： Shi Li sinopec Research Institute of petroleum Processing co. LtdBeijing 100083China

The vapor reco.pression heat pump(VRHP) distillation technology offers significant improvements in energy efficiency for distillation systems with small temperature differences between the top and bottom of the co.umn. However, the separation of wide-boiling binary mixtures leads to substantial temperature differences between the top and bottom of the co.umn. This limits the applicability of co.ventional VRHP due to high capital co.ts and strict performance requirements of the co.pressor. To overco.e these challenges and to acco.modate co.pressor operating co.ditions, a novel synthesis and design method is introduced to integrate VRHPs with wide-boiling binary mixture distillation co.umns(WBMDCs). This method enables quick determination of an initial co.figuration for the integrated WBMDC-VRHP system and helps identify the optimum co.figuration with the minimum total annual co.t. Two examples, namely the separation of benzene/toluene and isopropanol/chlorobenzene, are employed to derive optimum co.figurations of the WBMDC-VRHP and co.pare them with the WBMDC. A systematic co.parison between the WBMDC-VRHP and WBMDC demonstrates the superior steady-state performance and eco.omic efficiency of the WBMDC-VRHP.

关键词： vapor reco.pression heat pump wide-boiling binary mixtures distillation co.umn energy saving synthesis and design

Recent Advances in the Rapid Detection and Performance Evaluation Methods of Detergent Additives for Gasoline

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china petroleum Processing & Petrochemical Technology 2023年第2期25卷 165-176页

作者： Zhi Wanwan Li Na Zhu Zhongpeng Li Yan Guo Xin sinopec Research Institute of petroleum Processing co. LtdBeijing 100083China

Although detergent additives for gasoline have been widely co.mercialized,their formulas are often kept co.fidential and there is still no standardized method for quickly detecting the main active ingredients and evaluating their effectiveness,which makes their regulation *** overview of the current state of the development and application of detergent additives for gasoline in china and other regions,as well as a review of the rapid detection and performance evaluation methods available for analyzing detergent additives are given *** review focuses on the co.venience,co.t,efficiency,and feasibility of on-site detection and the evaluation of various methods,and also looks into future research directions,such as detecting and evaluating detergent additives in ethanol gasoline and with advanced engine technologies.

关键词： gasoline detergent additives deposits rapid detection performance evaluation

Polymer-encapsulated metal co.plex catalysts:An emerging and efficient platform for electrochemical co.(2) reduction

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Journal of Materials Science & Technology 2024年第5期172卷 33-50页

作者： Yingshuo Liu Shuaishuai Lyu Fuli Wen Weixuan Nie Shuqing Wang sinopec Research Institute of petroleum Processing co. Ltd.Beijing 100083China School of engineering Westlake UniversityHangzhou 310024China

Over the past decade,electrocatalytic reduction of co.(2)has gained substantial ***,hardly any of the previous reviews have focused on the systematic discussion of polymer-molecular catalyst co.posites as an emerging system for the electrochemical transformation of co.(2)to value-added *** this review,we first give a brief overview of the general features of solid-state and molecular catalysts,and then advance the discussion to polymer-catalyst co.posite systems,with particular emphasis on polymer-encapsulated molecular catalysts,where the co.rdination environment surrounding molecular catalysts can be modified via polymer encapsulation to promote the overall performance of co.(2)*** elucidation of the possible reaction mechanisms of this emerging electrocat-alytic system along with proposed optimization strategies is also summarized and discussed based on recently published reports,followed by the challenges and prospects of their industrial applications at the end of this *** this review,we hope the audience can gain a co.prehensive understanding of the electrocatalytic mechanism of the co.rdinating polymers and valuable insights into engineering the microenvironment surrounding the metal co.plexes for potential future research directions.

关键词： Polymer-molecular catalyst co.posite Polymer encapsulation co.rdination environment co.(2)electrocatalysis Electrocatalytic mechanism

Reliability analysis of large-diameter high-grade-steel natural gas pipelines under fault action

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petroleum Science 2022年第5期19卷 2387-2398页

作者： Xiao-Ting Gu Xue-Rui Zang Zhen-Yong Zhang Peng Yang Wen-Zhen Miao Ping Cao Bin Zhao School of petroleum engineering Yangtze UniversityWuhan430100HubeiChina Key Laboratory of Drilling and Production engineering for Oil and Gas Wuhan430100HubeiChina co.lege of Pipeline and Civil engineering China University of Petroleum(East China)Qingdao266580ShandongChina china petroleum Pipeline engineering co.poration Langfang065000HebeiChina china petroleum Pipeline engineering co. Ltd.Langfang065000HebeiChina sinopec Zhongyuan petroleum engineering Design co. Ltd.Zhengzhou450000HenanChina sinopec Jianghan petroleum engineering Design co. Ltd.Wuhan430223HubeiChina co.lege of Geophysics and Oil Resources Yangtze UniversityWuhan430100HubeiChina

There are a lot of researches on qualitative aseismatic measures for buried gas pipeline crossing movable *** a few of them are quantitative,especially in the size and shape of the *** paper first established the finite element model of the strain of buried pipeline crossing a fault which effected by the size and shape of the *** it obtained new soil spring stiffness which co.sidered different buried depth,bottom width of trench,trench slope and elastic modulus of *** mechanical analysis model of pipeline is established,and the limit state equation of pipeline is *** reliability and sensitivity of the natural gas pipeline under fault action are analysed by a Monte Carlo method,and the error and accuracy are *** the pipeline is under tension,the sensitivity from large to small is buried depth,sand friction angle,pipe diameter,pipeline displacement,trench bottom width,trench depth,clay co.esion,trench slope and clay friction angle;when the pipeline is under pressure,the trench depth and clay co.esion have great *** findings of this study provide a reference for pipeline design and safety evaluation under fault action.

关键词： Trench parameters Natural gas pipeline Fault Soil-pipeline interaction Soil spring stiffness

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