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3rd International Conference on Advanced Algorithms and Signal Image Processing, AASIP 2023

作者： Cai, Jiati Yu, Tong University of Electronic Science and Technology of China China CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781510668522

With the enhancement and enrichment of social media, cross network node alignment algorithms are playing an increasingly important role in interest recommendation and security protection. However, the performance of the same user in different online social networks platforms may differ due to the heterogeneous characteristics of the platform or unclear personal characteristics, which correspondingly poses many challenges. Existing cross network node association methods are restricted by the forgery of attributes and the time complexity of processing user generated content, and the overall effect is not ideal. This article mainly proposes a cross network node alignment algorithm based on friend following relationships and username similarity in different networks in online social networks. Using social network relationships to generate model vectors for two networks, and generating transformation matrices based on training sets, calculate confidence based on friend relationships for test samples, and organically combine the similarity of user names between the two networks to make associated user predictions, thereby linking the accounts of entities in the two networks and achieving node alignment. Experimental results indicate the node alignment method can achieve satisfactory performance. © COPYrIGHT SPIE. downloading of the abstract is permitted for personal use only.

关键词： Social networking (online)

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development and performance evaluation of a high temperature resistant, internal rigid, and external flexible plugging agent for water-based drilling fluids

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Petroleum 2023年第1期9卷 33-40页

作者： Zhe Xu Jinsheng Sun Li Li Kaihe Lv Jingping Liu Zhiwen dai Xianfa Zhang Zonglun Wang School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China CNPC Engineering Technology R&D Company Limited Changping10206China Oil&Gas Technology Research Institute of Changqing Oilfield Company Xi'an710000China

during the drilling process for oil and gas production,a larger number of drilling fluids invade the formation,causing severe formation damage and wellbore collapsing,which seriously hinders the efficient production of deep oil and *** several plugging agents have been developed for efficient fracture sealing in recent years,the development of high-performance plugging agents with self-adaptive ability and high-temperature resistance remain a ***,we report the synthesis of an internal rigid and external flexible plugging agent PANS by reversed-phase emulsion polymerization with nano-silica as the rigid core and poly(acrylamide-co-N-vinylpyrrolidone)as a flexible *** plugging agent has a median particle size of 10.5μm and can self-adapt to seal the microfractures and fractures in the formation,leading to an effective reduction in the filtration loss of bentonite water-based drilling fluid under both low temperature and low pressure(LTLP)and high temperature and high pressure(HTHP)*** addition,compared with the neat nano-silica(500 nm),the sealing efficiency of PANS toward 100–120 mesh sand bed was increased by 71.4%after hot rolling at 180°C.

关键词： Internal rigidity External flexibility Plugging agent Filter loss reduction Plugging performance

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Comprehensive Evaluation of a Novel recrosslinkable Preformed Particle Gel for CO2 Sweep Efficiency and Storage Improvement 84

Comprehensive Evaluation of a Novel Recrosslinkable Preforme...

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84th EAGE Annual Conference and Exhibition

作者： Bai, B. Long, Y. Al Brahim, A. Missouri University of Science and Technology United States CNPC Engineering Technology R&D Company Limited China

ISBN: (纸本)9781713884156

To overcome the inherent inferiors of pristine particle gel and in-situ polymer gels, such as the extrusion, dehydration, mechanical vulnerability and thereof defects, a new class of particle gels that can recrosslink at subterranean conditions, wherein maintaining stable in supercritical CO2, is described in this work. The newly developed particle gel is called CO2 resistant re-crosslinked preformed particle gel (CO2-rPPG). After being placed into target zone, the particles accumulate in the fractures or conduits and then self-recrosslink into a rubber-like bulk gel, which can block the target zone or bypassing zone, and thereby divert the chased fluid (e.g., CO2 or water) to the unswept zone. Therefore, the CO2-rPPG can be used to plug the preferential fluid flow channels in CO2 injection reservoirs and thus improve CO2 sweep efficiency and storage efficiency. In this paper, we will provide a comprehensive evaluation for the novel particle gel to tell where if it can used for CO2 flooding and storage projects for better plugging efficiency. results show the novel polymer particle gel provides a novel and cost-effective tool to control CO2 injection performance, improve sweep efficiency and storage efficiency for CO2 storage and EOr projects. © 2023 84th EAGE Annual Conference and Exhibition. All rights reserved.

关键词： Carbon dioxide

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Application status and prospect of ionic liquids in oilfield chemistry

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Petroleum 2024年第1期10卷 11-18页

作者： Jinsheng Sun Zhuoyang Xiu Li Li Kaihe Lv Xianfa Zhang Zonglun Wang Zhiwen dai Zhe Xu Ning Huang Jingping Liu School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China CNPC Engineering Technology R&D Company Limited Changping10206China Oil&Gas Technology Research Institute of Changqing Oilfield Company Xi'an710000China

The ionic liquid,as a new treatment agent,has been increasingly applied in oil fields due to its strong temperature resistance,good solubility and high surface *** this paper,we systematically discuss the action mechanism and application effect of ionic liquids in oilfield *** liquids can inhibit shale hydration expansion and reduce fluid loss through adsorption and intercalation,inhibit the formation of natural gas hydrate through imidazole five-membered ring structure as a space barrier,reduce viscosity of heavy oil by breaking chemical bonds of heavy oil macromolecules and charge transfer,improve oil displacement efficiency by forming ions pairs with carboxyl groups in crude oil,demulsify by forming channels between dispersed water droplets,acidify the formation by reacting with water to produce acid,interacts with organic material through weak hydrogen bonds and extracts it from oilfield wastewater,desulphurize by inserting sulfide molecules into the“stack”structure and form liquid inclusion complex,inhibit corrosion by forming a protective film on the metal *** on the above aspects,the development direction of ionic liquids is *** application of ionic liquids in oilfield chemistry is still in its *** is urgent to fully explore the application performance of ionic liquids in oilfield chemistry,which also provides theoretical and technical supports for efficient reservoir development.

关键词： Ionic liquids Oilfield chemistry Shale inhibitor drilling fluid

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Experimental research of polymer fracture under hydro-mechanical behavior

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Geomechanics and engineering 2025年第3期41卷 337-349页

作者： reffas, S.A. Elmeguenni, M. Zagane, M.S. Moulgada, A. Yaylacı, M. Yekhlef, r. Öztürk, Ş. Özdemir, M.E. Yaylaci, E. Uzun Department of Engineering Mechanics University Djilali Liabes of sidi bel abbés 22000 Algeria Department of Mechanical Engineering University of Ibn Khaldoun Tiaret 14000 Algeria Department of Civil Engineering Recep Tayyip Erdogan University Rize53100 Turkey Turgut Kıran Maritime Faculty Recep Tayyip Erdogan University Rize53900 Turkey Murat Yaylacı-Luzeri R&D Engineering Company Rize53100 Turkey Research center in Industrial Technology CRTI P.O.Box 64 Cheraga Algiers16014 Algeria Department of Civil Engineering Cankiri Karatekin University Çankırı18100 Turkey Faculty of Fisheries Recep Tayyip Erdogan University Rize53100 Turkey

POM pipes are used to transport fluids. For this application, in-depth knowledge of the material’s mechanical behavior and long-term performance is essential when subjected to mechanical stress. This article used an experimental approach based on macroscopic tests (thermal analysis technique for POM, tensile testing on notched axisymmetric specimens with measurement of the volume change), and complementary microscopic observations (MEB) to identify the cause of the damage. The results of the tests carried out at ambient temperature will be presented to show the influence of the type of control and the measurement principle (an assumption of homogeneous or isochoric deformation versus an assumption of transverse isotropic deformation) on the material’s response. © 2025 Techno-Press, Ltd.

关键词： Tensile testing

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Analysis and countermeasures of drilling challenges in complex ultra-deep exploration wells in thrust structural belt with multiple salt layers 6

Analysis and countermeasures of drilling challenges in compl...

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2023 6th International Workshop on Environment and Geoscience, IWEG 2023

作者： Zhang, Wei Zhou, Tuo Jin, Yulai Xiao, Yue Li, Hangyuan Baletabieke, Bahedaer Gu, Yixin CNPC Engineering Technology R&D Company Limited Beijing China College of Petroleum Engineering Beijing China

The deep and ultra-deep zones of Bokhtar oilfield in Tajikistan are the critical blocks for future exploration and development, which are imbedded between two salt layers, accompany with four reservoir and cap assemblages of middle and upper Jurassic, Lower Cretaceous, Upper Cretaceous and Paleogene. The reservoir and cap assemblages of pre-salt carbonate and salt-gypsum cap have great potential. The complicated geological structure, uncertain formation and non-developed pre-salt formations made the critical challenges for drilling operation, including: (1) The difficult casing program design caused by peripheral compression and thrust of the basin, the complicated geological structure, the large geological difference above and below the salt layer, the unfaithful prediction of multiple sets of salt layer, great formation pressure uncertainty, and many sealing points;(2) The upper salt formations are featured by developed thrust belt and large dip angle, the contradiction between deviation prevention and drilling acceleration in high steep structure is prominent, and the wellbore quality is difficult to control;(3) due to the mud loss in upper salt layer, loss coexisted with blow out in the salt layer and inaccurate prediction of salt bottom, the drilling complexes such as mud loss, overflow and well collapse are occurred frequently;(4) Ultra-deep well depth (over 7000m), HTHP (180°C,140MPa), multiple salt layers and long open hole section made high requirements on high temperature resistance of drilling fluid, cementing slurry and downhole tools, as well as high drilling risk and cost. It is necessary to carry out the drilling difficulties investigation of ultra-deep exploration well under the consideration of pertinence, safety, applicability and economy, then formed the suitable drilling engineering plan for Bokhtar Block through the optimization of domestic and foreign advanced and mature deep and ultra-deep well technologies, which is used to provide the techni

关键词： Quality control

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Plugging performance and mechanism of an oil-absorbing gel for lost circulation control while drilling in fractured formations

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Petroleum Science 2022年第6期19卷 2941-2958页

作者： Ying-rui Bai Li-Yao dai Jin-Sheng Sun Guan-Cheng Jiang Kai-He Lv rong-Chao Cheng Xiao-Sen Shang School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina CNPC Engineering Technology R&D Company Limited Beijing102206China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China

Lost circulation of drilling fluid is one of the most common engineering problems in the drilling process of fractured *** this study,an oil-absorbing polymer gel synthesized using compound monomers with rigid and flexible chains was applied to control the oil-based drilling fluid loss while *** microstructure,oil-absorbing performance,and plugging performance the gel was investigated.A large number of dense pores on the surface of the gel were observed,which allowed the oil molecules to enter the internal space of the *** initial oil absorption capacity of the gel was fast,and it increased with the increase in the temperature and decrease in the particle size,reaching 20.93 g/g at140℃.At a high temperature of 140℃,the bearing pressure capacity of the gel formula containing particles of different particle sizes reached 7.6 MPa for a fracture of a width of 3 mm,showing that the oil-absorbing gel have excellent plugging performance at high *** mechanism of the gel was investigated through visualized fracture plugging *** show that the dynamic migratio n,particle-swelling,particle-bridging,particle-aggregation,deformation-filling,and compaction-plugging contribute to the whole lost circulation control process,reflecting that the plugging performance can be effectively enhanced by improving the aggregation and filling degrees of the gel with different particle sizes.

关键词： Lost circulation Oil-absorbing gel Oil absorption capacity Plugging mechanism Fractured formation

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research on the Correlation Analysis Between Logging Parameters and rock drillability Based on random Forest 6

Research on the Correlation Analysis Between Logging Paramet...

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6th International Conference on Frontier Technologies of Information and Computer, ICFTIC 2024

作者： Lv, Congyue Zhao, Fei ding, Yan Cui, Yi Gao, reyu Wang, Ge Tian, Yumeng Jia, Wenting Lin, Boyang Li, Linfeng Cnpc Engineering Technology R&d Company Limited Beijing China College of Petroleum Engineering Beijing China

ISBN: (纸本)9798331541750

The rock drillability grade value is a comprehensive parameter that measures the ease or difficulty of rock fragmentation during drilling. determining this parameter is crucial for guiding bit selection and predicting drilling speed. There exists a strong correlation between certain logging parameters and the rock drillability grade value. To explore this correlation, a common practice is to use the Pearson correlation coefficient method, which mainly investigates the linear relationship between variables. However, relationships among complex formation characterization parameters are often nonlinear. To evaluate the pros and cons of the two analytical methods when dealing with nonlinear and complex data, a comparison was made, and the random forest algorithm was preferentially selected as the analytical tool to enhance the precision of the prediction model. Thus, this paper analyzes the correlation between logging parameters and the rock drillability grade value based on Pearson correlation analysis and the random forest algorithm. Using the Matlab programming language, logging parameter correlation analysis software named Correlation 1.0 was developed. The random forest algorithm was preferred to screen out logging parameters with high correlation to the drillability grade value (drilling depth and formation density), providing a new approach for establishing a high-precision formation rock drillability model. © 2024 IEEE.

关键词： rock drills

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double network self-healing hydrogel based on hydrophobic association and ionic bond for formation plugging

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Petroleum Science 2022年第5期19卷 2150-2164页

作者： Ying-rui Bai Qi-Tao Zhang Jin-Sheng Sun Guan-Cheng Jiang Kai-He Lv School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina CNPC Engineering Technology R&D Company Limited Beijing102206China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China

Self-healing hydrogels have attracted tremendous attention in the field of oil and gas drilling and production engineering because of their excellent self-healing performance after physical *** this study,a series of double network self-healing(dN_(SA))hydrogels based on hydrophobic association and ionic bond were prepared for plugging pores and fractures in formations in oil and gas drilling and production *** mechanical,rheological,and self-healing properties of the dN_(SA)hydrogels were *** revealed that the dN_(SA)hydrogels exhibited excellent mechanical properties with a tensile stress of 0.67 MPa and toughness of 7069 kJ/cm^(3) owing to the synergistic effect of the double *** addition,the dN_(SA)hydrogels exhibited excellent compression resistance,notch insensitivity,and self-healing *** dN_(SA)-2 hydrogel was granulated and made into gel particles with different particle sizes and used as a plugging *** self-healing mechanism of dN_(SA)-2 hydrogel particles in fractures was explored,and it’s plugging effect on fractures of different widths and porous media of different permeabilities were *** results revealed that the plugging capacity of the dN_(SA)-2 hydrogel particles for a fracture with width of 5 mm and a porous medium with a permeability of 30μm^(2) was 3.45 and 4.21 MPa,respectively,which is significantly higher than those of commonly used plugging agents in the *** dN_(SA)hydrogels with excellent mechanical and self-healing properties prepared in this study will provide a new approach for applying hydrogels in oil and gas drilling and production engineering.

关键词： Self-healing hydrogel Hydrophobic association Ionic bond Mechanical property rheological property Formation plugging

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Experimental Study on Hydraulic Fracture Propagation Mechanism of Water Injection Propagation in Super deep Fracture-Cavity Carbonate reservoir 13th

Experimental Study on Hydraulic Fracture Propagation Mechani...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Sun, Xun Liu, Jiangyu Jin, Yi ren, dengfeng Zhang, Yang Shang, Litao Bai, Haoli Wu, Xi CNPC Engineering Technology R&D Company Limited Beijing China PetroChina Tarim Oilfield Company Korla China

ISBN: (纸本)9789819702596

The super deep fracture-cavity carbonate reservoir in Tarim Basin has copious amounts of oil and gas, in which karst cave is the main reservoir space. It is necessary to communicate with karst cave through hydraulic fractures to realize efficient development due to the deep burial, poor physical properties, random distribution of natural fractures and caves, complex location relationship between wells and caves. Therefore, it is of great significance to study the hydraulic fracture propagation mechanism in fracture-cavity carbonate reservoir. In this research, a novel laboratory simulation method for water injection propagation was established based on true tri-axial hydraulic fracturing equipment. Using this method, the law of fracture connecting cave under different experimental conditions were analyzed, and the relationships between water injection volume and cave volume were clarified. The results show that: low stress difference, small included angle (between cave and horizontal maximum stress) and the use of temporary plugging agent have huge contribution to improve the number of caves that connected with hydraulic fractures;the critical turning condition of hydraulic fracture is sensitive to factors such as the position relationship of well and cave, horizontal stress difference and included angle. This study has certain theoretical guiding significance for fracturing design and water injection parameter optimization in fracture-cavity carbonate reservoir. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Fracture

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