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Prediction of multiscale laminae structure and reservoir quality in fine-grained sedimentary rocks:The Permian Lucaogou Formation in Jimusar Sag,Junggar Basin

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Petroleum Science 2022年第6期19卷 2549-2571页

作者： Xiao-Jiao Pang Gui-Wen Wang Li-Chun Kuang Jin Lai Yang Gao Yi-Di Zhao Hong-Bin Li Song Wang Meng Bao Shi-Chen Liu Bing-Chang Liu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Technology Administration Department Petro China Company LimitedBeijing100007China Research Institute of Exploration and Development Xinjiang Oilfield CompanyPetro ChinaKaramayXinjiang834000China

Fine-grained sedimentary rocks have become a research focus as important reservoirs and source rocks for tight and shale oil and *** development determines the accumulation and production of tight and shale oil and gas in fine-grained ***,due to the resolution limit of conventional logs,it is challenging to recognize the features of centimeter-scale *** close this gap,complementary studies,including core observation,thin section,X-ray diffraction(XRD),conventional log analysis,and slabs of image logs,were conducted to unravel the centimeter-scale *** laminae recognition models were built using well *** fine-grained rocks can be divided into laminated rocks(lamina thickness of<0.01 m),layered rocks(0.01-0.1 m),and massive rocks(no layer or layer spacing of>0.1 m)according to the laminae scale from core *** to the mineral superposition assemblages from thin-section observations,the laminated rocks can be further divided into binary,ternary,and multiple *** typical mineral components,slabs,and T2spectrum distributions of various lamina types are *** core can identify the centimeter-millimeter-scale laminae,and the thin section can identify the millimeter-micrometer-scale ***,they can detect mineral types and their superposition *** logs can identify the meter-scale layers,whereas image logs and related slabs can identify the laminae variations at millimeter-centimeter ***,the slab of image logs combined with thin sections can identify laminae assemblage characteristics,including the thickness and vertical *** identification and classification of lamina structure of various scales on a single well can be predicted using conventional logs,image logs,and slabs combined with thin *** layered rocks have better reservoir quality and oil-bearing potential than the massive and laminated *** laminated rocks’binary lamina is bette

关键词： Fine-grained sedimentary rocks Mineral composition Multiscale laminae structure Reservoir quality Image logs Lucaogou formation

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Saturation Estimation with Complex Electrical Conductivity for Hydrate-Bearing Clayey Sediments:An Experimental Study

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Journal of Ocean University of China 2024年第1期23卷 173-189页

作者： XING Lanchang ZHANG Shuli ZHANG Huanhuan WU Chenyutong WANG Bin LAO Liyun WEI Wei HAN Weifeng WEI Zhoutuo GE Xinmin DENG Shaogui College of Control Science and Engineering China University of Petroleum(East China)Qingdao 266580China School of Water Energy and EnvironmentCranfield UniversityCranfield MK430ALUnited Kingdom Department of Alternative Energy PetroChina Research Institute of Petroleum Exploration&DevelopmentLangfang 065007China School of Geosciences China University of Petroleum(East China)Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Clays have considerable influence on the electrical properties of hydrate-bearing *** is desirable to understand the electrical properties of hydrate-bearing clayey sediments and to build hydrate saturation(S_(h))models for reservoir evaluation and *** electrical properties of tetrahydrofuran-hydrate-bearing sediments with montmorillonite are characterized by complex conductivity at frequencies from 0.01 Hz to 1 *** effects of clay and Sh on the complex conductivity were analyzed.A decrease and increase in electrical conductance result from the clay-swelling-induced blockage and ion migration in the electrical double layer(EDL),*** quadrature conductivity increases with the clay content up to 10%because of the increased surface site density of counterions in *** the in-phase conductivity and quadrature conductivity decrease consistently with increasing Sh from 0.50 to *** sets of models for Sh evaluation were *** model based on the Simandoux equation outperforms Archie’s formula,with a root-mean-square error(E_(RMS))of 1.8%and 3.9%,respectively,highlighting the clay effects on the in-phase *** fre-quency effect correlations based on in-phase and quadrature conductivities exhibit inferior performance(E_(RMS)=11.6%and 13.2%,re-spectively)due to the challenge of choosing an appropriate pair of frequencies and intrinsic uncertainties from two *** second-order Cole-Cole formula can be used to fit the complex-conductivity *** pair of inverted Cole-Cole parameters,i.e.,characteristic time and chargeability,is employed to predict S_(h) with an E_(RMS) of 5.05%and 9.05%,respectively.

关键词： gas hydrate complex electrical conductivity hydrate-bearing clayey sediment hydrate saturation Simandoux equation frequency dispersion Cole-Cole formula

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Remanufacturing and Suitability Study of 3D-Printed Shafts for Maritime Application Based on Finite Element Analysis

Remanufacturing and Suitability Study of 3D-Printed Shafts f...

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International Conference on Humanoid, Nanotechnology, Information technology, Communication and Control, Environment and Management (HNICEM)

作者： Leif Oliver B. Coronado Earl John T. Geraldo Ronald Joaquin B. Javate Ulysses B. Ante Department of Science and Technology Metals Industry Research and Development Center (DOST-MIRDC) General Santos Avenue Bicutan Taguig Philippines

ISBN: (数字)9798350381177

ISBN: (纸本)9798350381184

The fabrication of shafts often involves multiple machining runs/processes and advanced machining skills. The recent developments in Additive Manufacturing (AM) technologies and materials offer a great alternative to conventionally manufactured parts, especially in maritime applications with limited resources. Although the laminar nature of additively manufactured, particularly material extrusion, parts limit its mechanical properties, AM's ability to quickly make customized and complex structural geometries offers more functional opportunities. Thus, its application in allowing an easy and cost-effective way to fabricate shafts (concentric and eccentric) is favorable, especially with the incorporation of Finite Element Analysis (FEA), which will provide first-hand simulation results for design optimization. In this study, the torsional stress and deformation for different types of shafts were evaluated using FEA. Also, the part was subjected to Design for Additive Manufacturing (DfAM) using material ONYX™ (proprietary micro carbon fiber-filled nylon). The result shows the maximum stress and maximum deformation to be favorable at 0.05031 MPa and 0.00687 mm. Hence, a reference improvement method for the design of the concentric and eccentric shaft is proposed based on these analyses. An actual functional test is also conducted on the final prototype to see the effect on the actual running conditions.

关键词： Shafts Three-dimensional displays Deformation Surveillance Simulation Machining Three-dimensional printing

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An Efficient Wrist Photoplethysmogram Quality Assessment Method Based on Wristwatches

An Efficient Wrist Photoplethysmogram Quality Assessment Met...

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IEEE SENSORS

作者： Yumin Li Li Ling Chao Chen Zhijun Xiao Chenxi Yang Junjie Pan Chaohong Liu Huan Li Yanan Zhou Chenghao Sui Jianqing Li Chengyu Liu School of Instrument Science and Engineering Southeast University Nanjing China The Department of Digital Health Research and Development Center Goertek Technology Co. Qingdao China

ISBN: (数字)9798350363517

ISBN: (纸本)9798350363524

Photoplethysmogram (PPG) is widely used to provide information about the cardiovascular system. However, PPG is very susceptible to various noises, especially wrist PPG. Highly noisy PPG could not provide sufficient information to reflect cardiovascular conditions. This study proposed an efficient signal quality assessment solution for wearable wrist PPG using only 10 time-domain features. Data from 170 participants were involved to evaluate the proposed solution. Proposed features were validated with the LightGBM model. The results show that the proposed solution achieves 0.93 in F1 score, which is higher than traditional methods. For each PPG segment, computing proposed features on the C++ platform consumes only 73.17±12.26 microseconds. Finally, the proposed method is deployed to an edge computing platform and realizes real-time PPG quality assessment.

关键词： Wrist Location awareness Computational modeling Noise Real-time systems Quality assessment Sensors Noise measurement Time-domain analysis Edge computing

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Cancer-macrophage hybrid membrane-camouflaged photochlor for enhanced sonodynamic therapy against triple-negative breast cancer

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Nano research 2022年第5期15卷 4224-4232页

作者： Lishan Zhang Ting Yin Baozhen Zhang Chong Yan Chengyu Lu Lanlan Liu Ze Chen Hui Ran Qingxia Shi Hong Pan Aiqing Ma Lintao Cai Guangdong Key Laboratory for Research and Development of Natural Drugs Key Laboratory for NanomedicineGuangdong Medical UniversityDongguan 523808China Guangdong Key Laboratory of Nanomedicine CAS-HK Joint Lab of BiomaterialsShenzhen Engineering Laboratory of Nanomedicine and NanoformulationsInstitute of Biomedicine and BiotechnologyShenzhen Institute of Advanced Technology(SIAT)Chinese Academy of SciencesShenzhen 518055China

Sonodynamic therapy(SDT)has aroused considerable momentum in cancer therapy due to its abilities of deep penetration,low toxicity,and noninvasion,while insufficient tumor accumulation of sonosensitizers is a major obstacle for SDT ***,we developed a 4T1 cancer cell-macrophage hybrid membrane(HM)-camouflaged sonosensitizer nanoplatform by encapsulating photochlor(HPPH)-loaded albumin nanoparticles(PHNPs).The experimental results proved that the HM-coated biomimetic NPs(PHNPs@HM)could express the characteristic membrane proteins of both cancer cells and macrophages,remarkedly enhancing the effective targeting and endocytosis to 4T1 cells through homologous adhesion recognition and immune ***,as a novel sonosensitizer,HPPH could generate amount of reactive oxygen species(ROS)under ultrasound(US)irradiation and exhibit obvious SDT efficiency to inhibit 4T1 tumor growth through ROS-induced cell *** study provides a novel and multifunctional biomimetic sonosensitizer system to enhance SDT efficiency.

关键词： biomimetic materials sonodynamic therapy hybrid cell membrane photochlor sonosensitizer noninvasive treatment

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research on Rotor/Fuselage Aerodynamic Interaction Based on Viscous Vortex Particles Method

Research on Rotor/Fuselage Aerodynamic Interaction Based on ...

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Chinese Control Conference (CCC)

作者： Zhangwen Liu Chuan Xu Zhengzhong Wang Yujie Ma Senkui Lu Ke Lu Science & Technology on Rotorcraft Aeromechanics Laboratory China Helicopter Research and Development Institute Jingdezhen P. R. China

A numerical method for helicopter rotor/fuselage aerodynamic interaction has been established. Where the viscous vortex particle method is applied to model rotor wake and the vortex panel method is employed to model the aerodynamic charac-teristics of helicopter components such as blade, fuselage, horizontal stabilizer, et al. Then the vortex flow-field of rotor/fuselage interaction is simulated and analyzed based on the developed method. Meanwhile, through the comparison of rotor/fuselage aerodynamic interaction between the test data and calculation value, the effectiveness and accuracy of the developed method has been validated. Based on this, some meaningful conclusions are drawn.

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Effect of the Ge Doping on Spin Glass Behaviors of Tb2nisi3 Compound

SSRN

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SSRN 2024年

作者： Bai, Xiaojun Wang, Luyao Pan, Zhiyan Cao, Chongde School of Physical Science and Technology Northwestern Polytechnical University Xi’an710072 China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen518057 China

Structure and magnetic properties of intermetallic compound Tb2Ni(Si1-xGex)3 were investigated with Ge-doping contents x=0, 0.1 0.2 and 0.5. With the increase of x, the chemical ordered components in Ni-Si-Ge layers increase. In the temperature dependence of dc susceptibility measurement, anomalies are observed at about 12 K and 4 K for all the samples. Frequency dependence of the ac susceptibility shows "two-peak structure" at about 12 K and 4 K. At about 12 K, long-range magnetic ordered phase transitions occur, the transition temperatures tend to increase when x increase. At about 4 K, the samples show cluster like spin glass behaviors. The spin glass intensities enhance and magnetic clusters decrease with the increasing in Ge-doping, which can be mainly attributed to the increase of chemical ordered components in Ni-Si-Ge layers. © 2024, The Authors. All rights reserved.

关键词： Spin glass

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YOLOv7-based Object detection method for coal gangue

YOLOv7-based Object detection method for coal gangue

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IEEE International Conference on Real-time Computing and Robotics (RCAR)

作者： Yuanhao Zhang Liang Ji Shuwen Ren Jian Ma Chenwei Xu Research and Development Center CCTEG Changzhou Research Institute Changzhou China School of Information and Control Engineering China University of Mining and Technology Xuzhou China

This paper presents a model and instructions for a coal gangue detection method. The separation of coal and gangue is of great significance for environmental protection and efficient resource utilization. As science and technology continue to develop, coal sorting requires intelligent, information-based, and specialized approaches to accelerate the construction of a modern economic system characterized by green and low-carbon, promoting the high-quality development of the coal industry. Coal and gangue have similar colors and irregular shapes, which results in low detection accuracy, misdetection, omission, and challenges in coal and gangue identification and sorting. To tackle these issues, this study proposes a series of enhancements to the YOLOv7 algorithm, including the replacement of the ELANNet backbone network with the CSPDarkNet structure, addition of the SE attention mechanism, and substitution of the loss function with SIoU, to improve coal gangue detection performance. Experimental results demonstrate that the improved YOLOv7 algorithm achieves a detection accuracy of 95.2% for coal gangue, which is 2.4% higher than the YOLOv7 model. Additionally, the improved YOLOv7 model is more robust, avoiding missed detection and false detection effectively and completing the coal gangue object detection task more efficiently.

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Restoration of reservoir diagenesis and hydrocarbon accumulation process by calcite in-situ U-Pb dating and fluid inclusion analysis: A case study on Cretaceous Qingshuihe Formation in Gaoquan Structure, southern Junggar Basin, NW China

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Petroleum Exploration and development 2023年第6期50卷 1386-1397页

作者： GUI Lili ZHUO Qingong LU Xuesong YANG Wenxia CHEN Weiyan WU Hai FAN Junjia HE Yinjun CAO Rizhou YU Xiaoqing Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China CNPC Key Laboratory of Basin Structure and Hydrocarbon Accumulation Beijing 100083China CNOOC Experimental Center Engineering Technology BranchCNOOC Energy Development Co.Ltd.Tianjin 300452China Wuxi Institute of Petroleum Geology SINOPEC Petroleum Exploration and Production Research InstituteWuxi 214126China

The complexity of diagenesis and hydrocarbon accumulation in the deep reservoirs in southern Junggar Basin restricts hydrocarbon exploration in the lower reservoir assemblage. The lithofacies and diagenesis of reservoirs in the Cretaceous Qingshuihe Formation in the Gaoquan structure of the Sikeshu Sag, southern Junggar Basin were analyzed. On this basis, the thermal history was calibrated using calcite in-situ U-Pb dating and fluid inclusion analysis to depict the hydrocarbon accumulation process in the Gaoquan structure. The results show that the Qingshuihe reservoir experienced two phases of calcite cementation and three phases of hydrocarbon charging. The calcite cements are dated to be (122.1±6.4) Ma, (14.4±1.0) Ma - (14.2±0.3) Ma. The hydrocarbon charging events occurred at around 14.2-30.0 Ma (low-mature oil), 14.2 Ma (mature oil), and 2 Ma (high-mature gas). The latter two phases of hydrocarbon charging contributed dominantly to the formation of reservoir. Due to the S-N compressive thrust activity during the late Himalayan period since 2 Ma, the traps in the Gaoquan structure were reshaped, especially the effective traps which developed in the main reservoir-forming period were decreased significantly in scale, resulting in weak hydrocarbon shows in the middle-lower part of the structure. This indicates that the effective traps in key reservoir-forming period controlled hydrocarbon enrichment and distribution in the lower reservoir assemblage. Calcite U-Pb dating combined with fluid inclusion analysis can help effectively describe the complex diagenesis and hydrocarbon accumulation process in the central-west part of the basin.

关键词： fluid inclusion calcite in-situ U-Pb dating diagenetic sequence hydrocarbon accumulation timing Sikeshu Sag southern Junggar Basin Cretaceous Qingshuihe Formation

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research on Control Strategy of Two Arm Collaborative Robot Based on Vision

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Journal of Computers (Taiwan) 2023年第6期34卷 173-183页

作者： Wei, Bing-Yan Zhang, Qian-Han Wu, Xiao-Ying Hebei Institute of Mechanical and Electrical Technology Hebei Province Xingtai054000 China Intelligent Electronic Products Research and Development Center Hebei Institute of Mechanical and Electrical Technology Hebei Province Xingtai054000 China

Double arm robots are increasingly being used in automated production due to their higher work efficiency and better flexibility. This article focuses on the research of visual recognition based robots applied in automated production lines. Firstly, the visual system has been improved and image labeled to make it more accurate in identifying targets. Then, path planning has been carried out for the coordinated movement of both arms. Through the unconstrained collaborative planning method of both arms, the efficiency and robustness of path planning have been improved. Finally, experimental simulation has been conducted to verify the effectiveness of visual assistance conditions. The effectiveness of the dual arm planning method. © 2023 Computer Society of the Republic of China. All rights reserved.

关键词： Motion planning

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