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Science china Chemistry 2025年

作者： Lulu Chen Yichao Huang Jiajun Wang Meihong Liao Zhiyuan Liu Meiqi Liu Hanqing Cai Lin Wang Lidong Gao Dawei Hu Lianming Zhao Ning Pu Zhuangjun Fan State Key Laboratory of Chemical Safety School of Materials Science and Engineering China University of Petroleum (East China) School of Mechanical and Electronic Engineering Qingdao Binhai University Qingdao Chuangqi New Energy Catalysis Technology co.Ltd. Sinopec Research Institute of petroleum Processing co.Ltd. Institute of Energy Hefei Comprehensive National Science Center

Insight into the growth behavior and electronic regulation of platinum （Pt） on various transition metal supports is paramount in developing high-performing electrocatalysts for hydrogen evolution reactions （HER）.Herein,we studied the influence of molybdenum-based supports （MoX,X=C,N,P,and S） on the growth behavior and electronic regulation of *** found that the formation energy variations between Pt single atom and clusters on MoX supports play a pivotal role in the growth behavior of ***,the electronic regulation of Pt induced by metal-support interaction may reflect the valence changes of Pt in Pt-MoX/*** Pt-MoC/C catalyst with a moderate valence state of Pt exhibits the best HER activity with an overpotential of 12.0 mV at 10 mA cm-2and a mass activity of 27.1 A mgPt-1,12.3 times as high as that of co.mercial 20 wt% Pt/*** work provides co.structive guidance for the design of high-performance HER catalysts.

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Research into the inversion of the induced polarization relaxation time spectrum based on the uniform amplitude sampling method

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petroleum Science 2016年第1期13卷 64-76页

作者： Pu Zhang Sheng Wang Kai-Bo Zhou Li Kong Hua-Xiu Zeng School of Automation Huazhong University of Science and Technology china petroleum logging co. Ltd

The induced polarization relaxation time spectrum（RTS） reflects the distribution of rock pore size,which is a key factor in estimating the oil or water storage capacity of ***,as the data acquisition and transmission abilities of well logging instruments are much limited due to the underground environment,it is necessary to explore suitable sampling methods which can be used to obtain an accurate RST with less sampling *** paper presents a uniform amplitude sampling method（UASM）,and co.pares it with the co.ventional uniform time sampling method（UTSM） and logarithm time sampling method（LTSM） in terms of the adaptability to different strata,RTS inversion accuracy,and stratum vertical *** simulation results show that the UASM can obtain high inversion accuracy of RTS with different kinds of pore size distribution formation,with high dynamic ranges of pore size,and with a small number of sampling *** UASM,being able to adapt to the attenuation speed of polarization curve automatically,thus has the highest vertical *** inversion results of rock samples also show that the UASM is superior to the UTSM and LTSM.

关键词： relaxation automatically adaptability instruments strata estimating inversion logarithm rock normalized

An Enhanced Dual-Layer Ensemble Framework for Porosity Prediction Utilizing co.ventional Well logging Data

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Journal of Earth Science 2025年

作者： Lu Qiao Shengyu Yang Qinhong Hu Huijun Wang Taohua He National Key Laboratory of Deep Oil and Gas， china University of petroleum (East china) Laboratory for Marine Mineral Resources， Qingdao National Laboratory for Marine Science and Technology Hubei Key Laboratory of petroleum Geochemistry and Environment (Yangtze University)， Yangtze University

Porosity is the one of the most fundamental and critical parameters for reservoir characterization and is closely related to the hydrocarbon storage capacity. The interpretation methods of co.ventional well logs have poor generalization capabilities to achieve the desired accuracy in porosity prediction. The increasing adoption of machine learning has ameliorated this predicament to some extent， but it remains difficult to reco.struct the co.plex and nonlinear relationship between logging responses and porosity by relying on individual machine learning models alone. This work proposes a two-layer model ensemble framework to predicte porosity， which includes base regressors in the first layer and meta regressor in the seco.d layer. The results indicate that the Light Gradient Boosting Machine (LightGBM) - Categorical-Features Gradient Boosting (CatBoost) ensemble model provides the highest prediction accuracy for the given dataset and is applied for porosity evaluation at other logged depths. This work also points out that the base regressor should be accurate and co.plex， while the structure of the meta-regressor should be simple in order to achieve the desired performance. Furthermore， the proposed model ensemble framework is versatile and applicable to reservoir evaluation， engineering development， and other potential fields due to its effectiveness and co.venience.

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Study on forward modeling of through-casing resistivity logging

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Science china Earth Sciences 2008年第S2期51卷 207-211页

作者： GAO Jie1,LIU FuPing2,BAO DeZhou3,CHENG Xi3 & ZHANG YuLing4 1 china University of petroleum,Beijing 102249,china 2 Beijing Institute of Graphic co.munication,Beijing 102600,china 3 china petroleum logging co. LTD.,Xi’an 710021,china 4 china National logging co.poration,Beijing 100101,china china University of petroleum Beijing China Beijing Institute of Graphic co.munication Beijing China china petroleum logging co. LTD. Xi’an China china National logging co.poration Beijing China

Through-casing resistivity logging (TCRL) is a new kind of logging method for formation evaluation,reservoir monitoring and saturation changes tracking. In this paper,the basic principle of TCRL is de-tailed,and the modified transmission line equation method (MTLEM) is first proposed in china. The MTLEM has been employed to simulate the responses of TCRL,on the basis of which,the effects of formation resistivity,cement and casing on the responses of TCRL are analyzed,and the signals in-duced in different formations are also calculated,which can help the design of TCRL tool and data processing and interpretation in china.

关键词： through-casing resistivity logging (TCRL) modified transmission line equation method (MTLEM) casing cement sheath

Gas-Solid Flow,co.bustion Characteristics,and Gas Emissions in a 75 t/h CFB Boiler Based on the CPFD Method

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Journal of Thermal Science 2025年第1期34卷 323-336页

作者： HUANG Xiankun BAI Zhang ZHU Xiaoli WANG Shuoshuo MU Lin GONG Liang co.lege of New Energy China University of Petroleum (East China) Key Laboratory of Ocean Energy Utilization and Energy co.servation of Ministry of Education School of Energy and Power EngineeringDalian University of Technology

A 3D simulation using co.putational Particle Fluid Dynamics（CPFD） methods was used to calculate co.l co.bustion in a 75 t/h industrial-scale circulating fluidized bed（CFB） *** characteristics,gas-solid flow characteristics,and gaseous pollutant emissions of CFB boilers from co.bustion ignition to stable operation were systematically evaluated in this *** show that the temperature distribution is relatively uniform throughout the *** the co.bustion process unfolds within the boiler,the gas co.position curve strikingly portrays the inverse co.relation between co.and *** the co.bustion reaction progresses,it beco.es evident that the co.centration of co.progressively increases,while the co.centration of O2co.currently *** inverse relationship undersco.es the fundamental co.bustion reaction,where carbon-based fuels react with oxygen to produce carbon dioxide and release ***,a co.prehensive analysis has revealed that,from ignition to stable co.bustion,both nitric oxide（NO） and sulfur dioxide（SO2） emissions exhibit a declining *** reduction in pollutant generation is attributed to the improvement in co.bustion *** co.plete co.bustion leads to lower levels of unburned hydrocarbons,which are prone to NO ***,the sulfur co.tent in the fuel is more efficiently oxidized to sulfur trioxide（SO3） or bound in sulfates,reducing *** steady state in the simulation,the SO2mass flow rate varies significantly with the furnace height,gradually increasing from 0.07 kg·s-1at 4 m at the bottom of the furnace to a peak of 0.078 kg·s-1at 8 m in the center,and then decreasing to 0.06 kg·s-1at 20m at the top of the furnace.

关键词： Sulfur dioxide

Ultrasonic tomography and its applications in oilfield

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第12期6卷 1420-1423页

作者：钟兴福吴应湘李东晖李强王兴国 Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China china petroleum logging co. Ltd. Changqing Business Division Changqing 710021 China Daqing Production Well logging Institute Daqing 163453 China

UTT （Ultrasonic Tomography Tool） is widely used in the oil industry and can be used to inspect co.rosion, casing wall damage, casing breakoff, and casing distortion in the well borehole with the maximum environment temperature being 125 ℃, and the pressure being 60 MPa. UTT co.sists of tool head, upper centralization, electronic section, lower centralization, transmitters, and receivers. Its outer diameter is 4.6 cm and length is 320 cm. The measured casing diameter ranges from 60 mm to 254 mm. The tomography resolution is 512×512. The borehole measurement accuracy is 2 mm. It can supply 3D pipe tomography, including horizontal and vertical profile. This paper introduces its specification, measurement principle, and applications in oilfield.

关键词： Ultrasonic tomography Downhole tool Casing hole

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

Integral equation of relationship on the apparent co.ductivity and true co.ductivity in induction logging

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Science china Earth Sciences 2014年第5期57卷 1972-1978页

作者： LI JianHao china petroleum logging co.Ltd

This paper investigates the relation between the induced electromotive force measured by induction logging tool and the apparent co.ductivity, and the relation between the apparent co.ductivity and the formation true co.ductivity. Assuming the co.ductivity in Green's function to be the function of the field point co.rdinate, the apparent co.ductivity expression of electric-field intensity is derived using Green's formula, and the integral equation has been established representing the relationship of the apparent co.ductivity with the true co.ductivity under this co.dition. The integral equation is analyzed and then leads to the co.clusion that the equivalent co.ductivity is the apparent co.ductivity and the values of the apparent co.ductivity function co.tain the true co.ductivity, and the method derived the true co.ductivity from the apparent co.ductivity around the well axis is put forward. The validity of the approach given in this paper is verified through numerical calculation. On the basis of above means, the transmitter co.l produces an electric-field distribution in formation at every point where the induction logging tool moves along a wellbore, and a number of the receiving co.ls obtain an apparent co.ductivity distribution; this is what induction electric-field logging is.

关键词： electric-field intensity induction logging formation apparent co.ductivity true co.ductivity integral equation

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Study of real-time LWD data visual interpretation and geo-steering technology

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petroleum Science 2013年第4期10卷 477-485页

作者： Shao Cairui Zhang Fuming Chen Guoxing Ji Jiaqi Hou Qinggong Tang Jianhong Cao Xianjun School of Geosciences China University of Petroleum CNPC West Drilling and logging co.pany SINOPEC Shengli Well logging co.pany

LWD（logging while drilling） data has been used to explore co.plex subtle reservoirs by realtime visual interpretation and *** method co.prises of co.puter co.munication,well log data processing,formation reco.nition,reservoir modeling and model updating in real *** studied the key technologies related to real-time LWD data visual interpretation and geo-steering and developed co.puter software with Chinese intellectual property rights co.ering the following important aspects： 1） real-time co.puter co.munication of well site LWD data;2） visualization of geological model and borehole information;3） real-time interpretation of LWD data;4） real-time geological model updating and geo-steering *** use field application examples to demonstrate the feasibility and validity of the proposed technologies.

关键词： LWD(logging while drilling) real-time visualization interpretation geo-steering

Log identification method in co.plex sand reservoirs

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Mining Science and Technology 2009年第4期19卷 531-536页

作者： ZHAO Xiao-liang LIAO Xin-wei CHEN Xi XU Sheng-feng XU An-zhu MOE Key Laboratory for petroleum Engineering China University of Petroleum Beifing 102249 China china petroleum logging co. Ltd. Xi＇ an Shaanxi 710021 China Sinopec International petroleum Exploration ＆ Production co.poration Beifing 100083 China Research Institute of petroleum Exploration ＆ Development Beifing 100083 China

In order to obtain effective parameters for co.plex sand reservoirs,a log evaluation method for relevant reservoir parameters is established based on an analysis in the gas-bearing sandstone with high porosity and low permeability,low porosity and permeability and on various characteristics of log responses to reservoir lithologies and physical properties in the Neopleozoic sand reservoir of the Ordos *** log evaluation method co.ers the co.k method that is used to evaluate the porosity and oiliness in high porosity and low permeability reservoirs and another method in which the mineral co.tent,derived from geochemical logs,is used to identify formation *** areas have high calcium and low silt co.tent,not uniformly distributed,the results of which show up in the co.plex formation lithologies and co.ventional log responses with great *** reliability of the method is verified by co.parison with co.ventional log data and co.e *** calculation results co.ncide with the co.e analytical data and gas tests,which indicate that this log evaluation method is available,provides novel ideas for study of similar co.plex reservoir lithologies and has some reference value.

关键词： co.plex formation lithology reservoir parameter evaluation co.k method geochemical element element co.tent mineral co.stituent lithological identification