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8th International Field Exploration and development Conference, IFEdC 2019

作者： Fang, Ping-liang Shao, Li-ming Xu, Xian-guang Cheng, rong-chao Kang, Xiao-na CNPC Engineering Technology R&D Company Limited PetroChina Beijing100083 China Research Institute of Petroleum Exploration and Development PetroChina Beijing China

ISBN: (纸本)9789811524844

In order to identify the function of coupling of flow and deformation during fracturing and development in tight oil reservoir and study the effect on reservoir performances due to the multi-media dynamic changes. Based on the mechanics mechanism of multi-media deformation on tight sandstone reservoir, the coupling of multiphase flow and reservoir deformation during fracturing and production was stated. The dynamic model of reservoir parameters for different development stages and the multiphase seepage mathematical model were established. On this basis, an integration of fracturing and production software module was developed. According to the numerical simulation on staged fracturing of horizontal wells and production in a Xinjiang tight oil field, the changing rules of physical parameters in porous and fracture media were obtained. By using this technology, the deformation law of multi-media in different development stages, such as expansion and contraction, opening and closing, rupture and propagation could be revealed;meanwhile, the effect of coupling of flow and deformation interaction on reservoir performances was analyzed quantitatively. Therefore, numerical simulation for dynamic changes of the multi-media in the fracturing and production can be used to exploit tight oil reservoir highly efficiently. © 2020, Springer Nature Singapore Pte Ltd.

关键词： deformation

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Challenge of temperature control for downhole instruments in HTHP reservoir

Challenge of temperature control for downhole instruments in...

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SPE Offshore Europe Conference and Exhibition 2019, OE 2019

作者： Gao, Wenkai Liu, Ke Jia, Hengtian Hong, difeng Teng, Xinmiao CNPC Engineering Technology R and D Company Limited

ISBN: (纸本)9781613996645

With the further exploration of oil and gas, we have to search for new resources which buried in deep strata, and most of the deep and ultra-deep wells are categorized in high-pressure/high-temperature (HPHT) wells. The problem of high temperature and the challenge to the existing downhole equipments are becoming increasingly prominent, where the drilling depth is severely restricted. The conventional measurement while drilling tools with common electronics will experience very high failure rates at these conditions. One of the solutions is called the active cooling technology, which can transfer the heat from electronics system to downhole environment. By this way, the temperature control of downhole instrument circuit system is realized. The active cooling technology is expounded in this paper, expecially about the principles and development status of each system. After evaluating and analyzing the characteristics of this technology, the function of heat transfer and constituent elements for the cooling system are summarized. The study from this work demonstrates the future work for downhole cooling technology: large refrigeration capacity, small size, strong adaptability and modularization. Copyright 2019, Society of Petroleum Engineers

关键词： Instrument circuits

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HAZ Characterization and Mechanical Properties of QP980-dP980 Laser Welded Joints

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Chinese Journal of Mechanical engineering 2021年第4期34卷 262-275页

作者： Junliang Xue Peng Peng Wei Guo Mingsheng Xia Caiwang Tan Zhandong Wan Hongqiang Zhang Yongqiang Li School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China R&D Center TANGSTEEL CompanyHBIS GroupTangshan 063016China Shandong Provincial Key Laboratory of Special Welding Technology Harbin Institute of Technology at WeihaiWeihai 264209China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Electrical Engineering Department Changchun Automobile Industry InstituteChangchun 130013China

The QP980-dP980 dissimilar steel joints were fabricated by fiber laser *** weld zone(WZ)was fully martensitic structure,and heat-affected zone(HAZ)contained newly-formed martensite and partially tempered martensite(TM)in both *** supercritical HAZ of the QP980 side had higher microhardness(~549.5 Hv)than that of the WZ due to the finer martensite.A softened zone was present in HAZ of QP980 and dP980,the dropped microhardness of softened zone of the QP980 and dP980 wasΔ21.8 Hv andΔ40.9 Hv,*** walls and slip bands were likely formed at the grain boundaries with the increase of strain,leading to the formation of low angle grain boundaries(LAGBs).dislocation accumulation more easily occurred in the LAGBs than that of the HAGBs,which led to significant dislocation interaction and formation of *** electron back-scattered diffraction(EBSd)results showed the fraction of LAGBs in sub-critical HAZ of dP980 side was the highest under different deformation conditions during tensile testing,resulting in the failure of joints located at the sub-critical HAZ of dP980 *** QP980-dP980 dissimilar steel joints presented higher elongation(~11.21%)and ultimate tensile strength(~1011.53 MPa)than that of dP980-dP980 similar steel joints,because during the tensile process of the QP980-dP980 dissimilar steel joint(~8.2%and 991.38 MPa),the strain concentration firstly occurred on the excellent QP980 ***,Erichsen cupping tests showed that the dissimilar welded joints had the lowest Erichsen value(~5.92 mm)and the peak punch force(~28.4 kN)due to the presence of large amount of brittle martensite in WZ and inhomogeneous deformation.

关键词： QP980 steel dP980 steel Fiber laser welding Microstructure evolution Tensile properties Formability

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development and Performance Evaluation of New High Temperature resistant Bulk Expanded Polymer Material 8th

Development and Performance Evaluation of New High Temperatu...

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8th International Field Exploration and development Conference, IFEdC 2019

作者： Shao, Li-ming Fang, Ping-liang Wei, Fa-lin Li, Wei-tao dai, Ming-li Research Institute of Petroleum Exploration and Development PetroChina Beijing China CNPC Engineering Technology R&D Company Limited PetroChina Beijing100083 China

ISBN: (纸本)9789811524844

High temperature-resistant polymer (HTP) was synthesized by in-situ cross-linking of interpenetrating reaction using H-2 monomer containing amide bond and H-1 molecule containing hydroxyl as raw materials. Ir spectra result showed that there were characteristic functional groups of H-1 and H-2 cross bond at the same time, that was to say that H-1 cross-linking reaction and H-2 polymerization could simultaneously take place. The interpenetrating cross-linking structure, extension properties at room temperature and long-term heat resistance properties of the material were tested. The experiment results showed that in the whole range of observations, HTP material cross-links and interpenetrates uniformly. The SEM pictures confirmed the interpenetration structure of HTP material. After cross-linking and interpenetration, the scale of HTP structure became smaller than before. This material had tensile resistance, dispersion stability in water, volume expansion, and could reach the maximum swelling ratio of 1.69 within 1.5 h at room temperature. At 90 °C, 120 °C and 140 °C, after soaking 130 days in formation water, HTP volume reduction rate was 1.57%, 3.24% and 6.82%, respectively. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Heat resistance

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A physics-informed deep learning framework for solving forward and inverse problems based on Kolmogorov–Arnold Networks

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Computer Methods in Applied Mechanics and engineering 2025年 433卷

作者： Wang, Yizheng Sun, Jia Bai, Jinshuai Anitescu, Cosmin Eshaghi, Mohammad Sadegh Zhuang, Xiaoying rabczuk, Timon Liu, Yinghua Department of Engineering Mechanics Tsinghua University Beijing100084 China Institute of Structural Mechanics Bauhaus-Universität Weimar Marienstr. 15 WeimarD-99423 Germany Institute of Photonics Department of Mathematics and Physics Leibniz University Hannover Germany Drilling Mechanical Department CNPC Engineering Technology RD Company Limited Beijing102206 China School of Mechanical Medical and Process Engineering Queensland University of Technology BrisbaneQLD4000 Australia ARC Industrial Transformation Training Centre—Joint Biomechanics Queensland University of Technology BrisbaneQLD4000 Australia

AI for partial differential equations (PdEs) has garnered significant attention, particularly with the emergence of Physics-informed neural networks (PINNs). The recent advent of Kolmogorov–Arnold Network (KAN) indicates that there is potential to revisit and enhance the previously MLP-based PINNs. Compared to MLPs, KANs offer interpretability and require fewer parameters. PdEs can be described in various forms, such as strong form, energy form, and inverse form. While mathematically equivalent, these forms are not computationally equivalent, making the exploration of different PdE formulations significant in computational physics. Thus, we propose different PdE forms based on KAN instead of MLP, termed Kolmogorov–Arnold-Informed Neural Network (KINN) for solving forward and inverse problems. We systematically compare MLP and KAN in various numerical examples of PdEs, including multi-scale, singularity, stress concentration, nonlinear hyperelasticity, heterogeneous, and complex geometry problems. Our results demonstrate that KINN significantly outperforms MLP regarding accuracy and convergence speed for numerous PdEs in computational solid mechanics, except for the complex geometry problem. This highlights KINN's potential for more efficient and accurate PdE solutions in AI for PdEs. © 2024

关键词： Stress concentration

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Optimization calculation method of ultra-deep production logging velocity profile correction coefficient

Optimization calculation method of ultra-deep production log...

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Internet of Things, Automation and Artificial Intelligence (IoTAAI), International Conference on

作者： Huawei Wang Lei Zhu Xianyuan Liu Zhizhen Liu Wenyuan Zhou Longmei Tian Wenguang Song Tarim Oilfield Company PetroChina Korla China R&D Center for Ultra-Deep Complex Reservoir Exploration and Development CNPC Korla China Engineering Research Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Uygur Autonomous Region Korla China School of Computer Science and Engineering Guangdong Ocean University Yangjiang China

ISBN: (数字)9798350386974

ISBN: (纸本)9798350386981

In recent years, with the continuous development of China's industry, the country's demand for petroleum energy has also increased. Therefore, maintaining stable production in oil fields is crucial for ensuring the stable development of the Chinese economy. dynamic monitoring of production logging is an important means of stabilizing and increasing oil and gas production. Generally, the flow rate values of fluids in each production layer in the production wellbore are measured using a turbine flowmeter. When measuring flow in the production wellbore using a turbine flowmeter, it is placed at the center of the wellbore fluid due to supporting equipment. The flow value measured by the turbine flowmeter is the flow value at the center of the wellbore. during the measurement process, when the turbine flowmeter is centered, it reflects the velocity Va of the fluid in the middle of the casing wellbore. In order to accurately obtain the cross-sectional flow rate value of the wellbore, it is necessary to measure the velocity value Vm of the fluid in the cross-section of the casing wellbore. At this point, dividing Vm by Va is denoted as Cv. The traditional method takes Cv as a constant value of 0.83. By studying the fluid velocity value in ultra deep production logging, it was found that the value Cv is not a constant value of 0.83. This value is closely related to the wellbore inner diameter, the ratio of turbine blade diameter to wellbore inner diameter, fluid density value, fluid viscosity value, and average fluid velocity value. This article designs an iterative optimization calculation method to calculate the Cv value. Comparing and analyzing the results of iterative optimization calculation with experimental values, it was found that the calculation accuracy of this method reached 97%. It can fully meet the requirements of calculating the fluid velocity value in the wellbore for production logging.

关键词： Fluids Accuracy Oils Optimization methods Production Flowmeters Iterative methods Velocity measurement Turbines Monitoring

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Field stabilization of pulse duration in a hundredfemtosecond level

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Chinese Optics Letters 2024年第8期22卷 93-99页

作者： runmin Liu Yong Wu Guoqing Pu Jiayang Cheng Huan Mu Bowen Liu Lilin Yi Minglie Hu Ultrafast Laser Laboratory Key Laboratory of Opto-electronic Information Science and Technology of Ministry of EducationSchool of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Advanced Communication Systems and Networks School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China R&D Center AIOPTICS Company LimitedShanghai 200240China

Pulse duration is considered as one of the most important characteristics of high-power femtosecond ***,pulses output from the laser system are susceptible to ambient changes and manifest the instability of pulse durations in an open *** this paper,incorporating the algorithmic framework of the improved stochastic hill-climbing search and incremental proportional-integral controller,temperature-induced fluctuations of pulse duration can be effectively compensated by an automatic feedback control in an all-fiber chirped-pulse amplification *** the experiment,sub-hundred femtosecond fluctuation of pulse duration is introduced to verify the performance robustness of the proposed pulse-duration feedback control(PdFC).The stability of pulse duration is obviously higher than the case without the feedback control,and the peak-to-peak fluctuation of pulse duration is reduced to 6.5%.Furthermore,the robust switching between different pulse durations proves the versatility of the *** expect that the proposed feedback control method could provide a novel insight into high-power femtosecond lasers widely applied in fundamental researches and industrial fields.

关键词： fiber amplifier femtosecond laser pulse-duration feedback control

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Simplified Calculation Method of Middle Tower Effect of Multi-tower Suspension Bridge

Simplified Calculation Method of Middle Tower Effect of Mult...

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2023 International Conference on Applied Mechanics, Materials Physics, and engineering Structures, MMPES 2023

作者： Xu, Xin Zhang, Yuan Peng, Chengming Li, Yonghui CCCC Second Harbor Engineering Company LTD Hubei Wuhan430040 China Key Laboratory of Large-span Bridge Construction Technology Hubei Wuhan430040 China R. and D. Ctr. of Transp. Indust. of Intelligent Mfg. Technologies of Transport Infrastructure Hubei Wuhan430040 China

In accordance with the "middle tower effect"design problem of multi-tower suspension bridges, the finite element method is currently used to find the reasonable range of the longitudinal stiffness of the middle tower through trial calculations. This method has disadvantages such as complex modeling and large calculation workload. Based on the principle of stiffness distribution, a simplified analysis method of the mid-tower effect of the multi-tower suspension bridge is proposed with the coordination of unbalanced force at the tower top and tower offset as the convergence target. By this method, the mid-span deflection-span ratio parameter and the anti-slip safety factor of the main cable at the saddle under the most unfavorable vehicle live load can be quickly obtained. relying on the Oujiang river North Estuary Bridge project, the applicability of the method is verified, and the result has a slight deviation from the finite element solution, and the calculation accuracy meets the requirements. The influence of the longitudinal stiffness of the center tower and the friction coefficient between the main cable saddle slots on the middle tower effect of multi-tower suspension bridge is studied. (1) For an 800 m main span multi-tower suspension bridge, when the longitudinal stiffness of the middle tower is greater than 4 MN.m-1, the structure can basically satisfy the requirements of the vertical rigidity of the specification, and the deflection-span ratio is greater than 1/300;when the longitudinal rigidity of the middle tower is greater than 20 MN.m-1, the structure can meet the design requirements of the deflection-span ratio of 1/400. (2) When the longitudinal tower stiffness of the middle tower is 4 MN.m-1, the maximum tower deflection reaches 0.95 m;when the stiffness of the middle tower is greater than 80 MN.m-1, the maximum tower deflection of the middle tower is less than 0.3 m, but the unbalanced force at the top of the tower is greater than 27000 kN, which i

关键词： Suspension bridges

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research and application of drilling rig optimization model

Research and application of drilling rig optimization model

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2024 8th International Conference on Electrical, Mechanical and Computer engineering (ICEMCE)

作者： Yue Xiao Tuo Zhou Guojun Liu Xuanren Chen Xiangji Kong Yu Zhang Longlong Liu Shunong diao CNPC Engineering Technology R&D Co. LTD PetroChina International Exploration and Development Co. LTD Overseas Drilling and Completion Technology Center Beijing China PetroChina International Exploration and Development Co. LTD Beijing China Changchun University of Technology Changchun China China University of Petroleum (Beijing) Beijing China

ISBN: (数字)9798331506230

ISBN: (纸本)9798331506247

The optimal selection of drilling rigs is crucial for the rational arrangement of drilling rigs in multi operation teams, the improvement of moving operation management level, and the enhancement of drilling operation quality and efficiency. At present, the optimal selection of drilling rigs only considers whether the drilling meets the needs of the drilling project and the moving distance, and cannot comprehensively and scientifically select drilling rigs, which is not conducive to the rational configuration evaluation of oilfield drilling rig operation. This article comprehensively considers key indicators such as drilling efficiency, time efficiency, moving cycle, moving cost, and moving distance, innovatively forms a pentagonal drilling rig optimization coordinate system, establishes drilling rig optimization rate, comprehensive standard deviation, drilling rig optimization comprehensive standard deviation and other indicators, and forms a drilling rig optimization model for drilling. Taking Block B as an example, the priority of Block B with three drilling rigs to be optimized calculated using the model is ${\mathrm {r}}1\gt {\mathrm {r}}2\gt {\mathrm {r}}3$.The optimal selection rate of drilling r1 is the highest, the comprehensive standard deviation is smaller, and the comprehensive index of the best and more stable drilling performance is the highest, which is 0.0058. Therefore, r1 should be selected for drilling. The drilling rig optimization model proposed in this paper provides a process reference for drilling rig optimization, quantifies various indicators, and provides a theoretical basis for new well drilling rig optimization, project company drilling rig operation plan formulation, and improving project company drilling rig management level.

关键词： drilling Costs Uncertainty Optimization models Computational modeling Stability criteria Companies Complexity theory Standards Optimization

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Prediction of rOP Method Based on Online Machine Learning and Multi-source data Preprocessing technology

Prediction of ROP Method Based on Online Machine Learning an...

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IEEE International Conference on Automation, Electronics and Electrical engineering (AUTEEE)

作者： Yang Yu Meng Cui Kai Huang Lei Luo Xiuling Zhang Hui Li CNPC Engineering Technology R&D Company Limited Beijing China Baoji Oilfield Machinery Co.Ltd Baoji China

ISBN: (纸本)9781665428408

The drilling operation is a large scale, technically complex and systematic project, which has always taken the top position of investment in oil exploration and development. Speed and efficiency are the primary goals of drilling engineering. Using information technology to optimize drilling parameters can reduce the complexity of accidents, improve the time efficiency of drilling, and significantly shorten the drilling construction cycle and save exploration and development costs. Forecasting drilling rate of penetration (rOP) is an essential component of drilling optimization. This paper introduces a machine learning-based permeability prediction method and its application effects. In response to the drilling rate of penetration (rOP) problem, a drilling rate of penetration (rOP) model based on an integrated learning algorithm is designed and implemented by mining the historical data collected from a specific block. Meanwhile, this approach is compared with traditional machine learning algorithms such as SVM, Lr and KNN. The experimental results indicate that the algorithm has better accuracy and applicability than other methods, which can provide a scientific and reliable reference for improving drilling rate of penetration (rOP) and technical support for realizing intelligent drilling.

关键词： drilling Measurement Machine learning algorithms Torque Machine learning Predictive models Prediction algorithms

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