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Journal of Advanced Manufacturing and Processing 2022年第2期4卷

作者： Zhu, Wenbo Castillo, Ivan Wang, Zhenyu rendall, ricardo Chiang, Leo H. Hayot, Philippe romagnoli, Jose A. Department of Chemical Engineering Louisiana State University Baton RougeLA United States Chemometrics AI and Statistics The Dow Chemical Company Lake JacksonTX United States Chemometrics AI and Statistics The Dow Chemical Company Terneuzen Netherlands Core R&D The Dow Chemical Company Lake JacksonTX United States Alkoxylation Technology Center The Dow Chemical Company Terneuzen Netherlands

In this article, multiple reinforcement learning (rL) methods such as value-based, policy-based, and actor-critic algorithms are investigated for typical control tasks found in the chemical industries. Through a critical assessment of these novel techniques, their main advantages are highlighted, but also the challenges that still need to be resolved are discussed. Two batch control tasks are used as benchmarks, namely, production maximization, and setpoint control. Using these testing environments, a direct comparison of different rL approaches is presented, which could guide the algorithm selection in future rL applications for batch process control. Furthermore, the results obtained with a traditional control method, model predictive control (MPC), are shown to provide a baseline for comparison with rL algorithms. The results show that rL has significant applicability in various control tasks and has comparable control performance to traditional methods but with a lower online computational cost. A batch bioreactor simulation and a simulation of an industrial polyol process are used for illustration purposes. © 2022 American Institute of Chemical Engineers.

关键词： reinforcement learning

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research Progress and Prospect of Well Integrity technology

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Journal of Power and Energy engineering 2020年第7期8卷 45-54页

作者： Lei Ma Kui Zhang Junfeng Xie Liang Yuan Hailong Geng Kun Ning Oil and Gas Engineering Institute Petro China Tarim Oilfield Company Korla China CNPC Engineering Technology R & D Company Limited Beijing China

Well integrity technology can effectively ensure the safety of the entire life cycle of oil and gas wells. With the exploration and development of more and more high-temperature, high-pressure, high-yield and deep wells, and the constantly increasing requirements for safety and environmental protection in various countries, well integrity technology has become a research hot spot in the oil industry. Based on the analysis of the four basic concepts of well integrity: full life cycle, well integrity management system, well barrier, and risk assessment, this article conducts a comparative analysis of the development history of well integrity technologies at home and abroad, and systematically summarizes foreign wells. The current status of integrity technology, based on the above investigation and analysis, puts forward suggestions for the next development direction of well integrity technology, which has certain guiding significance for the development of the integrity of the next step.

关键词： Well Integrity Basic Concept development Course technology Status Prospect

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New PdC bit with hollowed cutters: With increased rOP and longer service life

New PDC bit with hollowed cutters: With increased ROP and lo...

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Abu dhabi International Petroleum Exhibition and Conference 2019, AdIP 2019

作者： Zhang, Hongying Chen, Huihui Liu, Feng Wang, Na Huang, Yanfu Fang, Zhimeng Pan, Xingming Beijing Petroleum Machinery Co. Ltd CNPC Engineering and Technology R&D Company China Beijing Petroleum Machinery Co. Ltd CNPC China

ISBN: (纸本)9781613996720

A novel design of PdC bit with hollowed cutters is presented that uses the principle of hydraulic lubricating and water jetting mechanism to improve rOP. engineering results show its advantage compared to solid fixed cutters which are commonly used in today's drilling industry. The structure of the new PdC bit is as follows: each cutter contains a specific fluid channel, which is tailor made;the bit body contains many fluid channels;Compared with the existing conventional PdC bit, the main distinctive features are: the cutters are hollowed, each cutter contains a fluid channel in the centre of itself;and the bit body has fluid passages which are communicating with each hollowed cutter, allowing the drilling fluid flows from the inside of the bit to the outside of each cutter. The failures of a PdC bit are mostly due to premature wear or cracks of compound cutters;the wear or cracks are due to mechanical and thermal effects. To improve the service life of cutters can effectively increase the life of the drill bit. According to thermal stress analysis, the position where the frictional heat concentrated is in the centre of the cutter, which will result in the generation and expansion of thermal cracks, which in turn leads to failure of the cutter and loss of rOP. Therefore, the cutter with fluid passage will improve the way of thermal concentration and expansion, thereby prolonging the life of the drill bit, reducing the number of trips, improving single run drilling footage, therefore the drilling efficiency is increased. during the drilling operation, the rock cuttings cannot flow out timely, and may accumulate on the drill bit, which is commonly referred to as mud balling. The presence of mud balling will reduce the cutting capability of the drill bit and decrease the rOP. The new PdC bit with hollowed cutters has self-cooling and self-cleaning functions to mitigate the thermal effect, while the pressurized flow from the micro-hole of the cutter has the effect of w

关键词： Cracks

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Treatment technology of brine contamination and barite settlement for the high temperature and high density OBM for ultra-deep well drilling in western China

Treatment technology of brine contamination and barite settl...

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International Petroleum technology Conference 2019, IPTC 2019

作者： Wang, Jianhua Yan, Lili Liu, Fengbao Yang, Haijun Yin, da Xu, Xianguang CNPC Engineering Technology R and D Company limited China Petrochina Tarim Oilfield Company China

ISBN: (纸本)9781613996195

due to the existence of extremely high temperature, high pressure thick evaporite bed and brine layer, Kuqa piedmont structure has been identified as one of the most complicated drilling regions in the world which locates in Tarim Basin of China. In Keshen Block the occurrence rate of high pressure brine invasion during the drilling progress is high up to 56%, and barite in OBM mud is easy to settle under high temperature and longtime static conditions. Therefore, brine invasion and barite settlement are serious challenges for ultra-deep wells drilling in Western China. Increasing the density of mud is one method to deal with brine invasion during drilling, but lost circulation is easy to be caused. Another method is discharge the brine in batches to reduce the high pressure of brine layer, which requests the higher brine capacity of OBM. In this instance, a new emulsifier used in OBM was compounded to enhance the emulsifying efficiency through the increase the number of hydrophilic group on single emulsifier molecular structure. The experiment results indicated that the ability of OBM tolerance to brine contamination is higher than 60%. The instrument for evaluating the sedimentation rate of OBM at high temperature (200°C) and high pressure (20MPa) has been developed. The experiment results indicated that increasing rM6 value could improve the stability of settlement. Well KS1101 encountered lost circulation and high pressure brine layer in the same horizon, the safety density window of the drilling fluid is almost zero. Thus, the method of brine discharge in batches was used to reduce the brine layer pressure to ensure the drilling safety. A total of 1129.98m3 brine was discharged by 64 times of drainage and avoided the lost circulation. The rheology of OBM is stable, and the brine water capacity of the drilling fluid system is more than 45%. Throughout the drilling process, there was no downhole complex occurred. This OBM system has been wildly used in Keshen Blo

关键词： Infill drilling

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A new tEdFM-based analysis of interference characterization in tight gas reservoir

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Energy 2025年 330卷

作者： Zekai Tang Zhiming Chen Jiapeng Han Xin Zhao Zhaowei Chen Peng Tan State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum at Beijing Beijing 102249 China Hildebrand Department of Petroleum and Geosystems Engineering The University of Texas at Austin Austin TX 78712 USA CNPC Engineering Technology R&D Company Limited Beijing 102249 China

Tight gas reservoirs are a key component of the global unconventional energy supply, yet their development is significantly challenged by inter-well interference. Quantitative methods for analyzing interference are scarce, and existing models often rely on idealized fracture assumptions. This study presents an inter-well interference model for tight gas reservoirs with complex fracture networks using the transient embedded discrete fracture model (tEdEM). The model incorporates heterogeneous hydraulic fractures, stochastic natural fractures, and coupled interflow between matrix and fracture systems, while considering reservoir stress sensitivity and gas-water two-phase flow. Four conceptual interference models are established based on fracture connectivity: matrix (Type I), natural fracture (Type II), hydraulic fracture (Type III), and hydraulic fracture-wellbore interference (Type IV). The degree of production interference (dPI) is defined as a quantitative measure. Sensitivity analysis shows that stress sensitivity and hydraulic fracture half-length significantly impact interference. An actual case study in the ZT tight gas block demonstrates intermediate interference (dPI = 0.11) due to natural fracture interactions. This study enhances the understanding of inter-well interference mechanisms, provides strategies to mitigate interference, and supports sustainable unconventional gas production.

关键词： Petroleum reservoir evaluation

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PH-rESPONSIVE NANO-GEL PLUGGING MATErIAL, ANd PrEPArATION METHOd THErEFOr ANd USE THErEOF

PH-RESPONSIVE NANO-GEL PLUGGING MATERIAL, AND PREPARATION ME...

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作者： ZHANG, Jie 张洁 CHENG, rongchao 程荣超 FENG, Jie 冯杰 ZHAO, Zhiliang 赵志良 WANG, Shuangwei 王双威 LI, Long 李龙 ZHANG, Tianyi 张天怡

标准号: WO2023/279712(A1)

Provided in the present invention are a pH-responsive nano-gel plugging material, and a preparation method therefor and the use thereof. The pH-responsive nano-gel plugging material comprises the following raw materials in parts by mass: 50-70 parts of water, 2-3 parts of an emulsifier, 25-35 parts of an acrylic terpolymer, 10-15 parts of a polyalcohol compound, and 10-20 parts of a vinyl pyridine compound. The pH-responsive nano-gel plugging material can be applied to the plugging of Ordovician carbonate rock fractures and micro-karst cave strata, and can automatically identify Ordovician carbonate rock fractures and micro-karst cave leaking layers and realize effective blocking thereof.

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Triple-Cladding Ytterbium doped Fiber for 12 kW Single Module

Triple-Cladding Ytterbium Doped Fiber for 12 kW Single Modul...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Yue Meng Zuying Xu Xudong Shi Yu Li Tianying Liu Can Li Xiao Yan Wei Zheng Heng Wang Jiangang Yu Zhiyong Zhao Ming Tang Optical fiber R&D center Everfoton Technologies Corp oration Limited State Key Laboratory of Optic al Fiber and Cable Manufactu re Technology Yangtze Optical Fibre and Cable Joint Stock Limited Company Wuhan 4 China Optical fiber R&D center Everfoton Technologies Corp oration Limited Wuhan China Wuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan China

High power continuous-wave ytterbium-doped fiber lasers have unique advantages such as high electro-optical efficiency, excellent beam quality and good thermal management, and are widely used in industrial materials processing and scientific research. However, multi-kW $(\geqslant$ 10kW) high-power fiber lasers has encountered numerous technology challenges in double-cladding fibers. In this work, we designed and fabricated a triple-cladding ytterbium doped fiber with large core diameter by using Modified Chemical Vapor deposition (MCVd) combined with all-gas-phase doping method. An excellent laser performance could be demonstrated for such a fiber with an output power of more than 10 kW and a slope efficiency of 82%, no Transverse Mode instability (TMI) is observed. Long-term laser stability at 12 kW-level was carried out in a master oscillator power amplifier (MOPA) laser system for 500 hours with power degradation less than 1%, meanwhile a stimulated raman scattering (SrS) suppression ratio that is larger than 45dB was obtained.

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research and practice of full life cycle well integrity in HTHP well, tarim oilfield

Research and practice of full life cycle well integrity in H...

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International Petroleum technology Conference 2019, IPTC 2019

作者： Liu, Hongtao Cao, Lihu Xie, Junfeng Yang, Xiangtong Zeng, Nu Zhang, Xuesong Chen, Fei PetroChina Tarim Oilfield Company China CNPC Engineering Technology R and D Company Limited China

ISBN: (纸本)9781613996195

There is abundant natural gas in Kuqa foreland area of Tarim basin, the reservoir has characteristics of ultra depth(6500m-8000m), high pressure(115MPa-140MPa), high temperature(170°C-190°C) and complex corrosive medium, which bring well integrity high challenge. There are 52 production wells in the Kuqa foreland basin in 2012. The 16 wells of these production wells exist sustained casing pressure(SCP). The SCP wells caused by the tubing string failure is 61%. Since 2012, in order to build safe well barrier and achieve scientific production management, consider all important periods of drilling, well testing, well completion and production in well full life cycle. the design methods of the four main well barrier components(casing string, cement, tubing string, well head) are optimized. A set of technology for well barrier quality control, well maintenance and well production management is formed. Finally, the key technology of full life cycle well integrity for ultra depth, HPHT gas well is formed. In view of the large angle of bedding, well deviation controlled difficultly, and coexistence of high pressure saline aquifer and week bed in one open hole section which lead to serious casing wear and poor cement stone, the vertical well drilling technology, the collapse resistance casing design methods, the casing wear preventing measures, negative pressure test method and high temperature, high density cementing technology are completed. These technologies improve the safety of casing string and the quality of cement. Considering the extreme working conditions(the partial pressure of CO2 is beyond 2MPa, The content of chlorine is about 80000mg/L, acid job, 136MPa pump pressure in well head)of tubing string, material selection method, triaxial stress analysis method, quality control technology for tubing string is optimized. The failure ratio of tubing string reduced from 50% in 2013 to zero in 2017. referencing API rP 90-2 and IOS16530-2, a special calculation method f

关键词： Life cycle

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Optimization of drilling performance based on an intelligent drilling advisory system

Optimization of drilling performance based on an intelligent...

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International Petroleum technology Conference 2019, IPTC 2019

作者： Abughaban, Mahmoud Alshaarawi, Amjad Meng, Cui Ji, Guodong Guo, Weihong Saudi Aramco Saudi Arabia CNPC Engineering Technology R and D Company China

ISBN: (纸本)9781613996195

Optimization of drilling parameters during drilling operations is a key component to obtain maximum rate of penetration (rOP) as well as minimizing the drilling cost. Advancement in computer technologies and communication are among the most important factors that can contribute to drilling optimization. In the current work, a novel rig advisory system is developed to continually improve rOP and the drilling performance. Conventionally, drillers apply drilling parameters (weight-on-bit, rotary speed and pump rate) according to past experience or to parameters specified in the drilling program. These parameters are usually kept constant over a long interval regardless of the formations being drilled. However, it is well-known that keeping constant drilling parameters to drive the bit will lead to redundant depth of cut (dOC), inducing stick-slip vibration that leads to low rOP, higher drilling specific energy (dSE), and potential damage to the bottom-hole assembly (BHA). An intelligent drilling advisory system (IdAS), based on a soft-closed-loop solution with multiple regression analysis called optimum parameters global retrieval, has been established. Integrated with machine-learning methodology (Principal component analysis), the response of the drilling parameters with lithology changes was analyzed in real time. Additionally, the optimum control parameters direction were obtained from the gradient search and decision tree algorithms. This system monitored the relationship between the rOP and input energy delivered to the bit in real time, and calculated the optimized drilling parameters. The work presented how the IdAS procedures were applied in China, how the data was interpreted, and how optimum working parameters were obtained to guide drillers to improve drilling performance and reduce non-productive time (NPT). IdAS has been introduced to hard formation drilling, which proved to be a success in real-time advisory aiding drillers applying proper working parame

关键词： Principal component analysis

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IoT-driven defect detection System for Plastic recycling Plants Based on Convolutional Neural Networks

IoT-Driven Defect Detection System for Plastic Recycling Pla...

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Self Sustainable Artificial Intelligence Systems (ICSSAS), International Conference on

作者： Priyanka Madhiraju rajeshkumar Sampathrajan Manjula Pattnaik P. rajalakshmi K. dhivya S. Murugan Department of Computer Science and Engineering Matrusri Engineering College Hyderabad Telangana India McKinsey & Company Fort Worth Texas USA Accounting Department College of Business and administration Princess Nourah Bint Abdulrahman University Saudi Arabia Department of Computer Science and Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Chennai Tami Nadu India Department of Electronics and Communication Engineering SRM Institute of Science and Technology Kattankulathur Chennai Tamil Nadu India Department of Biomedical Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai Tamil Nadu India

ISBN: (数字)9798350368413

ISBN: (纸本)9798350368420

To improve the accuracy of plastic recycling facilities this paper introduces an Internet of Things (IoT)driven defect detection system that uses Convolutional Neural Networks (CNNs). Traditional techniques of fault identification are time-consuming and prone to human error, which makes plastic recycling less than ideal from an environmental sustainability perspective. To track the movement of plastics in real time, the system makes use of IoT sensors placed all throughout the recycling facility. To correctly detect plastic material flaws like contamination, discoloration, or physical damage, this data is then input into a CNNs model that has been tuned for image analysis. The proposed system outperforms conventional approaches in terms of efficiency and accuracy of flaw identification, as shown by rigorous testing. This method improves the quality and longevity of plastic recycling operations while simultaneously streamlining defect identification procedures via the use of IoT technology and CNNs. The IoT presents exciting new methods to lessen the negative effects of plastic recycling facilities on the environment while simultaneously increasing their efficiency and effectiveness, meeting the growing demand for environmentally friendly waste management solutions throughout the world.

关键词： Fault diagnosis Quality control Sensor systems real-time systems recycling Sensors Plastics Convolutional neural networks Contamination defect detection

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