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Mn-doped SrcoO_(3-δ) Perovskite Oxides for Ethylene Production via Chemical Looping Oxidative dehydrogenation of Ethane

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China Petroleum Processing & Petrochemical technology 2024年第3期26卷 53-62页

作者： Li Zhi Liu Linjiao Hao daijun ren Xiaohang Shen Fangxia Li Xin Yu Anping Luoyang R&D Center of Technology of Sinopec Engineering(Group)Co.Ltd. Luoyang 471003China

Chemical looping oxidative dehydrogenation (CL-OdH) is an economically promising method for convertingethane into higher value-added ethylene utilizing lattice oxygen in redox catalysts, also known as oxygen carriers. Inthis study, perovskite-type oxide SrcoO_(3-δ) and B-site Mn ion-doped oxygen carriers (Srco_(1-x)MnxO_(3-δ), x=0.1, 0.2, 0.3)were prepared and tested for the CL-OdH of ethane. The oxygen-deficient perovskite SrcoO_(3-δ) exhibited high ethyleneselectivity of up to 96.7% due to its unique oxygen vacancies and lattice oxygen migration rates. However, its low ethyleneyield limits its application in the CL-OdH of ethane. Mn doping promoted the reducibility of SrcoO_(3-δ) oxygen carriers,thereby improving ethane conversion and ethylene yield, as demonstrated by characterization and evaluation experiments.X-ray diffraction results confirmed the doping of Mn into the lattice of SrcoO_(3-δ), while X-ray photoelectron spectroscopy(XPS) indicated an increase in lattice oxygen ratio upon incorporation of Mn into the SrcoO_(3-δ) lattice. Additionally, H2temperature-programmed reduction (H2-TPr) tests revealed more peaks at lower temperature reduction zones and a declinein peak positions at higher temperatures. Among the four tested oxygen carriers, Srco0.8Mn0.2O_(3-δ) exhibited satisfactoryperformance with an ethylene yield of 50% at 710 °C and good stability over 20 redox cycles. The synergistic effect of Mnplays a key role in increasing ethylene yields of SrcoO_(3-δ) oxygen carriers. Accordingly, Srco0.8Mn0.2O_(3-δ) shows promisingpotential for the efficient production of ethylene from ethane via CL-OdH.

关键词： ethane ethylene perovskite chemical looping oxidative dehydrogenation

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Mechanism of Polycrystalline diamond compact and diamond Impregnated Cutter Hybrid Bit composite rock Breaking

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Journal of engineering Science and technology review 2023年第2期16卷 189-196页

作者： Yu, Jinping Ji, Guodong Wu, Qiang Wang, Qing Hu, Huaigang CNPC Engineering Technology R&D Co. Ltd Beijing102206 China

rock breaking efficiency of drill bits is an important index for measuring the drilling efficiency in the oil and gas drilling field, and it is influenced by many factors, such as structure and material. This study developed a calculation model and an experimental model of rock breaking of polycrystalline diamond compact (PdC) and diamond impregnated cutter (dIC) hybrid bit to reveal the influence of bit structure and material on tangential force, axial force and wear height. On the basis of the calculation model of the co-rail arrangement of the PdC–dIC hybrid bit and the rock breaking mode, a rock breaking mechanical parameter prediction model and a rock breaking performance test model were established. rock stress calculation method, rock failure criterion, and mechanical specific energy (MSE) calculation method were used to analyze the rock stress and the relationship between MSE and tangential force, axial force, and wear height during combined rock breaking. The accuracy of the model was verified by experiments. results show that the specific work of rock breaking of the PdC-dIC hybrid bit is less than that of PdC, and a reverse nonlinear relationship exists between specific work of rock breaking and wear height. The energy required for hybrid bit to break rock is less than that of PdC bit. A positive nonlinear relationship exists between the energy of PdC-dIC hybrid bit and the wear height, whereas the cutting depth and the wear height show a negative nonlinear relationship. The stress distribution of PdC rock breaking is uniform, and the maximum equivalent stress is up to 104 MPa. The stress distribution of rock breaking of the hybrid PdC-dIC is extremely nonuniform, and stress concentration occurs with a minimum equivalent stress of 84 MPa and a maximum stress of 161 MPa, which is beneficial to rock breaking. rock breaking of PdC-dIC hybrid bit can promote the generation and development of rock cracks, thereby reducing the crushing strength of the rock. The

关键词： rocks

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CG-FCLNet:Category-Guided Feature collaborative Learning Network for Semantic Segmentation of remote Sensing Images

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computers, Materials & continua 2025年第5期83卷 2751-2771页

作者： Min Yao Guangjie Hu Yaozu Zhang College of Information Engineering Shanghai Maritime UniversityShanghai201306China R&D Department Shanghai Freesense Technology Co.Ltd.Shanghai200000China

Semantic segmentation of remote sensing images is a critical research area in the field of remote *** the success of convolutional Neural Networks(CNNs),they often fail to capture inter-layer feature relationships and fully leverage contextual information,leading to the loss of important ***,due to significant intraclass variation and small inter-class differences in remote sensing images,CNNs may experience class *** address these issues,we propose a novel Category-Guided Feature collaborative Learning Network(CG-FCLNet),which enables fine-grained feature extraction and adaptive ***,we design a Feature collaborative Learning Module(FCLM)to facilitate the tight interaction of multi-scale *** also introduce a Scale-Aware Fusion Module(SAFM),which iteratively fuses features from different layers using a spatial attention mechanism,enabling deeper feature ***,we design a Category-Guided Module(CGM)to extract category-aware information that guides feature fusion,ensuring that the fused featuresmore accurately reflect the semantic information of each category,thereby improving detailed *** experimental results show that CG-FCLNet achieves a Mean Intersection over Union(mIoU)of 83.46%,an mF1 of 90.87%,and an Overall Accuracy(OA)of 91.34% on the Vaihingen *** the Potsdam dataset,it achieves a mIoU of 86.54%,an mF1 of 92.65%,and an OA of 91.29%.These results highlight the superior performance of CG-FCLNet compared to existing state-of-the-art methods.

关键词： Semantic segmentation remote sensing feature context interaction attentionmodule category-guided module

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recommendation of rigless Solution to Ensure Wellbore Integrity and develop Low-Perm reservoirs in Middle East: Maximize Vitality of coiled Tubing in Staged Fracturing, Water Injection and Fluid Monitoring

Recommendation of Rigless Solution to Ensure Wellbore Integr...

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2024 SPE conference at Oman Petroleum and Energy Show, OPES 2024

作者： Chen, Chen Bai, Haoli Liu, Shanshan Zhao, Shufen Liu, Bingshan Che, Yang Liu, Huifeng CNPC Engineering Technology R&D Company Ltd. China CNPC R&D DIFC Company Ltd. United Arab Emirates

ISBN: (纸本)9781959025252

Low-perm carbonate reservoirs in the Middle East have great potential for development. Hydraulic fracturing is one of the key technologies to unlock their commercial potential. In recent years, an increasing number of oil companies have placed emphasis on the development of low-permeability reservoirs. The Sadi reservoir in Halfaya oilfield (Iraq) is characterized as a medium-porosity, extremely low to ultra-low-permeability limestone reservoir. due to poor reservoir properties, it has remained largely untapped. drawing from mature experiences in developing similar reservoirs globally, the application of multi-stage hydraulic fracturing techniques in horizontal wells, exemplified by the S5H1 well, has been initiated as a pilot test. AdNOC, a decade ago, commenced the development of the Arab d tight oil reservoir. The original acid stimulation plan was modified to a fishbone fracturing completion scheme. This adjustment not only resulted in significant cost savings per well, but also achieved an initial production rate of over 2100 barrels per day, more than triple that of the original plan. The production continues to be stable at present. Besides, AdNOC has been focusing on development of low-permeability (dY Zone A), using MrC (maximum reservoir contact) and compatible reservoir stimulation technologies. In Oman's daleel oilfield, the average thickness of the oil reservoir ranges from 10 to 30 meters, constituting a thin-layered, low-permeability carbonate reservoir. Maintaining the integrity of the wellbore is a critical consideration in the development of low-permeability reservoirs. Poor wellbore integrity can lead to complications in the production stage, resulting in an increasing quantity of inactive strings. To mitigate potential risks, the two-barrier philosophy serves as a guiding principle. This approach mandates the implementation of two independent and tested barriers to prevent issues related to well control during production operations and interventi

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Application of Support Vector Machine (SVM) Method in reservoir Lithology Classification in Sichuan Basin 13th

Application of Support Vector Machine (SVM) Method in Reserv...

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13th International Field Exploration and development conference, IFEdC 2023

作者： Yu, Jin-Chen CNPC Engineering Technology R&D Company Ltd. Beijing China

ISBN: (纸本)9789819704828

reservoir evaluation is essential for the scientific and rational design of geological exploration plans, and reservoir evaluation relies on obtaining information about reservoir lithology. With the deep integration of geophysical exploration technology and artificial intelligence, the use of artificial intelligence technology provides great convenience for complex and diverse geophysical exploration sites. Based on the support vector machine (SVM) method in machine learning, this paper uses actual well logging data from a gas well in the Sichuan Basin to train the algorithm and classify reservoir lithology in oil and gas development. The application of the support vector machine method in reservoir lithology is less explored. This paper effectively trains the support vector machine model with a large amount of well logging data and focuses on the influence of the C value and gamma value in support vector machines on classification accuracy. By optimizing the C and gamma values in support vector machines, the classification accuracy was improved from 0.63 to 0.75, effectively improving the convergence speed and optimization accuracy of the Sichuan Basin reservoir lithology identification algorithm. The successful application of the support vector machine in the classification of reservoir lithology in the Sichuan Basin demonstrates the significant cost reduction and efficiency improvement significance of artificial intelligence technology in geophysical exploration. © The Author(s), under exclusive license to Springer Nature Singapore Pte ltd. 2024.

关键词： Support vector machines

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A Three-dimensional Model for the Formation Pressure in Wellbores under Uncertainty

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Fluid dynamics & Materials Processing 2023年第9期19卷 2305-2314页

作者： Jiawei Zhang Qing Wang Hongchun Huang Haige Wang Guodong Ji Meng Cui Hongyuan Zhang Strategic Planning and Technical Support Institute CNPC Engineering Technology R&D Co.Ltd.Beijing102206China

Formation pressure is the key parameter for the analysis of wellbore *** increasing drilling depth,how-ever,the behavior of this variable becomes increasingly *** this work,a 3d model of the formation pres-sure under uncertainty is *** a relevant algorithm is ***,the logging data of regional key drilling wells are collected and a one-dimensional formation pressure proﬁle along the well depth is ***,a 3d model of regional formation pressure of the hierarchical group layer is deﬁned by using the Kriging interpolation algorithm relying on a support vector machine(SVM)and the formation pressure of the drilled *** validate the method,the formation pressure of one pre-drilled well is compared with the well logging *** comparison reveals that the maximum relative error is less than 4.5%.The software based on this model is complemented by a computer visualization technology,which provides a relevant tool for under-standing and analyzing the 3d formation *** outcomes of this study are intended to support the char-acterization of areas with missing or poor 3d seismic data and provide more accurate information for the analysis of wellbore integrity.

关键词： Formation pressure with uncertainty well integrity kriging interpolation 3d pressure body

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downhole resistivity Imaging System While drilling 12th

Downhole Resistivity Imaging System While Drilling

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12th International Field Exploration and development conference, IFEdC 2022

作者： Jia, Heng-Tian dou, Xiu-rong Ai, Wei-Ping Pan, Xing-Ming Mao, Wei-Min Fan, Yi-Feng Xie, Xia Yang, Qiu-Yi CNPC Engineering Technology R&D Co. Ltd Beijing China

ISBN: (纸本)9789819919635

(1) Purpose and scope of the study: As the drilling and development scale of the oil and gas reservoirs with deep, unconventional and other complex geological structures is expanded and deepened, the measurement of more sidewall formation details along the wellbore trajectory while drilling is required to guide the wellbore trajectory through the reservoir and improve the drilling catching rate and recovery. Therefore, it is of paramount importance to accurate identification of the formation structure information of 360° sidewall and the judgment of the change in the stratigraphic dip of formation to dynamically and accurately measure the sector angle of gravity tool face (GTF) of the drilling tool and the resistivity information of wellbore formation when drilling. (2) Methods, steps and process of the study: For the aforesaid purpose, the downhole near-bit measurement-while-drilling (MWd) resistivity imaging system is designed. High-precision sensors for the real-time measurement of three-axis geomagnetism and gravity and the multi-source data fusion processing algorithm are used to conduct 360° imaging measurement of sidewall formation along wellbore trajectory under the conditions of strong vibration and impact and high speed during drilling, in combination with high-precision sidewall formation resistivity measurement method of button electrode. (3) results, cognition and conclusion of the study: The MWd resistivity imaging system is used in Turpan-Hami oilfield to measure the resistivity of the sidewall formation of the drilling section, upload the measured information of formation resistivity to the ground, accurately guide the adjustment of drilling direction, maintain the borehole trajectory through the reservoir, and improve the drilling efficiency and drilling catching rate. (4) Innovation, technical contribution and significance of the study: The MWd resistivity imaging system, through real-time tracking of complex reservoir structure, can judge sidewall

关键词： Lithology

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design of Automatic Feeding device for 15,000 Meter Class Liquid drilling Fluid Additives 13th

Design of Automatic Feeding Device for 15,000 Meter Class Li...

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13th International Field Exploration and development conference, IFEdC 2023

作者： Xiao, Jian-Qiu Yang, Hui Shao, Qiang Hu, Zhi-Jian Han, Fei Li, Xing-Yue CNPC Engineering Technology R&D Company Limited Beijing China CNPC Oilfield Technology Service Co. Ltd. Beijing China

ISBN: (纸本)9789819702558

In order to improve automation, efficiency, and HSE level during drilling fluid preparation and maintenance of ultra-deep and extra-deep wells, an automatic feeding device for 15000 m class liquid drilling fluid additives was developed. The automatic feeding device of liquid drilling fluid additives is composed of liquid storage tanks, liquid conveying pumps, pipeline control valves and auxiliary devices. The liquid drilling fluid additives can be quickly transported to the liquid storage tanks by the suction pumps for temporary storage. When the drilling fluid is prepared or maintained, the drilling fluid additives can be quickly transported to the mud mixing system by the liquid metering pumps. It enables accurate, automatic, high-speed dosing of liquid additives into the mud mixing system for increased job flexibility and ease of use. The operator controls and monitors operations using human-computer interaction interface mounted on the control cabinet’s touchscreen. Operation parameters are set using the human-computer interaction interface. An information area on the touchscreen displays real-time system status whenever the system is running. The development of the device will create basic conditions for the automatic and intelligent of drilling fluid preparation and maintenance, and improve and the level of on-site HSE. © The Author(s), under exclusive license to Springer Nature Singapore Pte ltd. 2024.

关键词： Tanks (containers)

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Active control of the fluid pulse based on the FxLMS

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Petroleum 2024年第4期10卷 745-758页

作者： Hai Yang Jie Liu Zexing Yang Haibo Liang Lizao Zhang Jialing Zou School of Mechanical and Electrical Engineering Southwest Petroleum UniversityChengdu610500China Chengdu Drainage Co. LtdChengdu610023China CNPC Engineering Technology R&D Company Limited Beijing102200China

In petroleum engineering,the performance of drilling fluid is the key factor affecting the drilling *** fluid rheology can be measured by tube *** pulsation will cause measurement deviation of differential pressure and flow velocity data during measurement,and it accumulates when the flow curve is ***,the accuracy of drilling fluid rheological pipe measurement is seriously *** view of the problem of fluid pulsation can seriously affect the accuracy of tube *** paper proposed an algorithm based on Filtered-x least mean square(FxLMS).First,the active control strategy is studied,the mathematical model of electric regulating valve control is established,the FxLMS algorithm of variable step length is studied,the simulation model of the control system is established,and the control effect of different algorithms is *** dynamic experimental platform of fluid pulse active control for drilling fluid rheological pipe measurement is designed and *** experimental data show that:after active control,the average relative error of drilling fluid shear force decreased by 179.6%,the average relative error of plastic viscosity decreased by 78.1%,and the average relative error of the apparent viscosity decreased by 25.5%.It proves that the active control algorithm can improve the accuracy of tube measurement more effectively.

关键词： drilling fluid Active control Fluid pulsation FXLMS rheology

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research on drilling Technologies of Ultra-Thick Salt domes in Middle Asia and Pre-Salt Strata in Middle East: Lessons Learnt from a Pilot Well in Kenkyak Oilfield and an HPHT Well in Halfaya Oilfield

Research on Drilling Technologies of Ultra-Thick Salt Domes ...

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2023 Offshore technology conference Brasil, OTCB 2023

作者： Jin, Fu Wanting, Jia Longlian, Cui Guobin, Yang Chen, Chen CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781959025023

Pre-salt strata are more and more common in recent years, challenging the petroleum industry. The reservoir in Kenkyak Oilfield (Kazakhstan) is found in deep formation beneath the ultra-thick salt dome, which brings lots of challenges such as mud loss, well kick, pipe-sticking, borehole caving, low rOP and so on. As for Halfaya Oilfield in Iraq, HF-10 is expected to be drilled as the first vertical exploration well in the region, targeting Baluti/Kurra Chine, but the complicated multiple pressure regime, cross-bedded high-pressure and low-pressure formations has been challenging the operator for decades, especially the two high-pressure formations above Yamama, one is the Lower Fars layer featured by salt-gypsum and a high pore pressure coefficient. How to safety and efficiently penetrate pre-salt strata and ultra-thick salt domes are rather important issues. Logging data of all wells that had been drilled previously in the region were studied to analyze causes of low rOPs and downhole complexities of all kinds. A pilot well was drilled in Kenkyak Oilfield and optimized drilling technologies were applied on it, so as to make a comparison between it and adjacent wells. rock cores in the salt-gypsum formation were collected to analyze its creep deformation law on a basis of rock mechanics and establish the creep deformation formula. Important findings have been analyzed, in order to deal with the similar scenarios in Iraq. The upper Mesozoic formation contains sandstones and intercalated mudstones with ooze, which increases permeability and hydration grade. However, problems such as mud loss, borehole collapsing and bit ball-up always happen. Shallow secondary gas with a limited volume and high pressure was drilled in the pilot well in Kenkyak Oilfield. The polymeric mud system and integrated solid control devices were used for the large diameter borehole to deal with mudstone hydration. In the Permian ultra-thick salt dome salt and gypsum dissolve to cause borehole c

关键词： Boreholes

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