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Offshore technology Conference 2020, OTC 2020

作者： Cai, Xiao Guo, Qingfeng Fu, Chunkai Jiang, Hongwei Liang, Lei Cnpc Engineering Technology R and D Company Limited China University OfLouisiana at Lafayette United States

ISBN: (纸本)9781613997079

due to the special working environment, offshore drilling operation faces multiple challenges such asnarrow pressure margin, difficulty in detecting down hole conditions and high operational risk. A newmanaged pressure drilling equipment is developed and named as pressure control drilling system-I (PCdS-I), which integrates the techniques of constant bottomhole pressure and microflux control and it is capableof performing the underbalanced, near-balanced and overbalanced MPd drilling as required. This new-typemanaged pressure drilling equipment is applied in several offshore wells to perform near-balanced managedpressure drilling operations with great success. Before utilizations, real-time hydraulic calculations are conducted based on the field data and backpressures are designed for reducing the density of drilling fluid. In the field applications, the PCdS-Iprecisely keeps the bottomhole pressure constant and minimizes the pressure fluctuations, creating a near-balanced drilling condition. In addition to the real-time bottomhole pressure measured by pressure whiledrilling (PWd) equipment, the pumping rate and returning rate of drilling fluid are monitored by the PCdS-I. The cumulative pumping and returning volumes of drilling fluid and their difference are calculated bya program and compared with the volumes of drilling tools, providing a new way to detect the overflowand lost circulation in the tripping operations. data of other operators are monitored and analyzed, such aslogging data, providing reference for detecting the downhole condition and determining the back pressure. Multiple drilling processes are successfully completed without any issue occurs with the assistance ofthis new managed pressure drilling equipment, including drilling, ma king connections, tripping, snubbingand circulating, etc. Cooperated with the PCdS-I, the density of drilling fluid dramatically reduces, whichminimizes the possibility of formation damage and benefits the identification

关键词： drilling fluids

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Numerical Simulation of Slotted Screen Plugging Mechanism Based on Cfd-dem Coupling

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SSrN 2022年

作者： deng, Fucheng Gao, Zhiwei Cao, Yanfeng deng, Junyu Shen, Xuefeng School of Mechanics Engineering Yangtze University Hubei Jingzhou434000 China CNOOC Research Institute Beijing100028 China CNPC Engineering Technology R&D Company Limited Tianjin300457 China China Petroleum Technology and Development Corporation Beijing100028 China

As the simplest and commonly used mechanical sand control method in well completion, slotted screen sand control is used for filling sand control, independent sand control in thermal production wells or geothermal wells. In order to explore the plugging mechanism of slotted screen and the factors affecting sand production during sand control, the CFd-dEM coupling method is used in this paper. The discrete element method is used to establish the model considering the physical properties of sand particles in the formation, and the fluid flow model is established combined with the finite volume method, and the full coupling solution of the two is realized and the model verification is completed. The effects of particle size distribution, sand concentration, slotted size and fluid velocity on slotted screen plugging are studied, and the plugging mechanism of slotted screen is revealed. The following research results are obtained. First, the retention form of sand particles at the screen gap is the fundamental factor affecting screen plugging. Sand bridging will have a certain probability of collapse, resulting in "false stability". Second, the proportion of larger diameter sand determines the formation time and stability of "sand bridge", and the proportion of smaller diameter sand determines the compactness of solid retention. Third, sand concentration is very important to control the plugging removal frequency of screen. Fourth, the gap size and fluid velocity affect the pressure difference on the screen surface and the stability of the "sand bridge". This study provides a reference for optimizing the selection and production control of slotted screen during the downhole sand control design. © 2022, The Authors. All rights reserved.

关键词： Sand

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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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HIGH-PErFOrMANCE SULPHATE_FrEE CLEANSErS: SUrFACE ACTIVITY, FOAMING ANd rHEOLOGY

HIGH-PERFORMANCE SULPHATE_FREE CLEANSERS: SURFACE ACTIVITY, ...

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2021 AIChE Annual Meeting

作者： Yorke, Kelly Potanin, Andrei Jogun, Suzanne Morgan, Andre Shen, Hongwei Amin, Samiul Department of Chemical Engineering Manhattan College RiverdaleNY United States R&D - Global Technology & Design Colgate-Palmolive Company PiscatawayNJ United States

ISBN: (纸本)9781713852834

recently, consumers have made a large push to have the personal care product and cosmetic industries formulate products that are more natural and sustainable. One way the personal care products industry responded to this newly found importance of sustainability was by introducing sulphate-free cleansing products [1,2]. Sulphate-based anionic surfactants are commonly used in products such as shampoos and body washes as the major surface-active agent [3]. Amin et al illustrate how anionic surfactants, such as sodium lauryl ether sulfate (SLES) and sodium lauryl sulfate (SLS), are used as benchmark surfactants because their physical and chemical properties produce minimal surface tension values, providing excellent cleansing and foaming properties, and are able to build up a gel-like viscosity, due to the presence of elongated wormlike micelles [4]. Additionally, Amin et al show how these properties can be further enhanced when combined with a zwitterionic surfactant, such as cocamidopropyl betaine (CapB) [4]. While these properties are ideal, consumers called for a more gentle, greener alternative because sulphates have a public perception that are viewed as harsh, leading to drying out of the hair and skin, along with other unfavourable views [3]. It is a major advantage for surfactants to be sulphate-free and more natural, but a challenge arises in their ability to produce decent results in a variety of parameter studies, such as surface tension, foaming and rheology [5]. © 2021 American Institute of Chemical Engineers. All rights reserved.

关键词： Sulfur compounds

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depersing Tib2 Nanoparticles in Al Composites Via Ultrasonic Assisted Fast Cooling Schemes

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SSrN 2024年

作者： Chen, Jian Geng, Jiwei Li, Yugang Li, Keneng Xia, Peikang Li, Xianfeng Wang, Fangming Chen, dong Wang, Mingliang Wang, Haowei State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University No. 800 Dongchuan Road Shanghai200240 China Anhui Provincial Industrial Generic Technology Research Center for Alumics Materials Huaibei Normal University Huaibei235000 China Anhui Provincial Engineering Research Center of Aluminium Matrix Composites Huaibei235000 China CNPC Engineering Technology R&D Company Limited Beijing102206 China

Particle agglomeration poses the principal challenge in solidification of particulate reinforced metal matrix nanocomposites (MMNCs). Here we present an approach aimed at achieving a uniform distribution of nanoparticles (NPs) in aluminum matrix via a combination of ultrasonic dispersion and fast cooling processing. Microstructure analysis reveals that the distribution of NPs in the matrix transforms from intergranular distribution to intergranular distribution at the microscale and the interface between NP and the matrix changes from incoherent to coherent at the nanoscale under the action of ultrasonic melt treatment. Theoretical analysis underscores the significance of NP size and cooling rate as the two prominent factors influencing NP distribution during the solidification of nanocomposites. Through the ultrasonic dispersion of NPs and particle engulfment during the fast cooling process, the ductility of highly dispersed nanocomposites exhibits significant enhancement, with an increase of 82.7% and 18.4% compared to that of pure aluminum and non-ultrasonic-treated samples, respectively. © 2024, The Authors. All rights reserved.

关键词： Nanoparticles

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Experimental Study on Evaluation of Propped Fracture Conductivity of Conglomerate reservoir in Baikouquan Formation of Ma-A Well Area of Xinjiang Oilfield

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SSrN 2022年

作者： Wang, Zhenyu Lin, Botao Chen, Gang dai, Yifan Chen, Ang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing102249 China College of Artificial Intelligence China University of Petroleum Beijing102249 China CNPC Engineering Technology R&D Company Limited Beijing102249 China CNPC Engineering Technology Research Institute of Xinjiang Oilfield Xinjiang834000 China

In recent years, Mahu tight conglomerate reservoir has been a critical area of Xinjiang oilfield development. Extensive displacement fracturing with ceramsite as a single proppant can not form propped fractures with high conductivity. Therefore, to determine how to create propped fractures with high conductivity. In this paper, a series of studies have been carried out in the Mahu glutenite reservoir by combining laboratory experiments with a field analysis. Indoor large-scale actual triaxial test analyzed the influence of stress difference, construction displacement, and natural weak plane on fracture initiation and propagation. The proppant conductivity evaluation experiment takes quartz sand and ceramsite as the research objects and evaluates the influence on fracture conductivity, including sand laying concentration, single or mixed proppant, proppant embedding, and crushing degree. The selection standard of proppant in the Mahu glutenite reservoir is clarified, which provides a theoretical basis for selecting proppant in subsequent field production. On the one hand, according to the theoretical understanding obtained from laboratory experiments, guidance and improvement are provided for the late construction scheme and some production processes. On the other hand, the variable displacement fracturing method can use small displacement communication with a weak side. © 2022, The Authors. All rights reserved.

关键词： Proppants

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dynamic Bubble Tracking in Fluidized Beds Via Electrical Capacitance Volume Tomography

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SSrN 2023年

作者： Watson, Brigham Lindmüller, Lennard Heinrich, Stefan Theuerkauf, Jörg Yao, Yuan Fan, Yi Hamburg University of Technology Institute of Solids Process Engineering and Particle Technology Denickestraße 15 Hamburg21073 Germany Engineering and Process Science Core R&D The Dow Chemical Company Lake JacksonTX United States

This work sets forth the development of a novel, dynamic bubble detection algorithm for use with electrical capacitance volume tomography (ECVT) sensors for bubbling fluidized beds. Starting with an in-depth review of existing bubble detection methods, the novel phase detection method was developed to address the shortcomings of the other published methods by more fully utilizing the three-dimensional capability of the sensors. After the sensor parameters were optimized to verify capability of bubble detection, measurements were made with glass beads and quartz sand. A range of air velocities in a 10 cm diameter bubbling fluidized bed were used. The results largely agree with the fundamentals of bubbling fluidization and results from publications with similar experimental setups. Within each measurement the bubble dimensions, velocities and frequencies over the axial and radial position could be evaluated. due to the three-dimensional nature of the novel bubble detection technique, insight into the directional tendencies of detected bubbles was gained. For example, bubble migration toward the radial center of the bed, radial and axial bubble coalescence, and splitting are more evident from the trends that are producible with this method. © 2023, The Authors. All rights reserved.

关键词： Fluidized beds

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New technology for Improving Water Flooding Efficiency by Adjusting Advantage Channels 8th

New Technology for Improving Water Flooding Efficiency by Ad...

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8th International Field Exploration and development Conference, IFEdC 2019

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

ISBN: (纸本)9789811524844

Underground cross-linking profile control and water shutoff and deep fluid flow to chemical agent system are usually composed of main agent, cross-linking agent and additives. The cost of cross-linking agent and additives generally accounts for 30–50% of the total cost of the system. Many inorganic salt ions are widely used as cross-linking agent or additives. In this paper, using Ca2+ and Mg2+ scale forming ion source in CaCl2 water type oilfield high salinity formation water (as water injection) as crosslinking agent, cross-linking of original inorganic microgel is carried out to reduce the cost of steering agent. The formation of nano microscale inorganic microgel with density similar to that of environmental water source can be formed by cross-linking of the steering agent with scale forming ions in formation water. The microgel can be dispersed or suspended in water, and gradually adsorbed on the rock skeleton of the dominant channel such as hole or crack to form a micro gel coating in order to narrow the flow dominant channel and form resistance to flow. The passage of plugging does not die, achieving the purpose of adjusting the dominant channel, expanding the volume and improving the efficiency of water flooding. At the same time, the particle size of the micro gel can prevent it from entering the low permeability matrix to contaminate the oil layer. The diversion agent has the characteristics of rapid dissolution, temperature resistance, salt resistance, environmental protection, long-term effectiveness and no construction risk. Field tests of deep profile control and flooding have been carried out in reservoirs with different temperature and salinity at home and abroad. After profile control diversion in test blocks or well groups, the effect of improving water flooding is good. The average increase of water injection pressure is 2–3 MPa, and the effective rate of increasing oil production and precipitation in oil wells is more than 80%, and the validity p

关键词： Chlorine compounds

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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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deformation visualization in oil sand under water injection by using continuous photographic and dic technique 14th

Deformation visualization in oil sand under water injection ...

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14th International Congress on rock Mechanics and rock engineering, ISrM 2019

作者： Pang, Huiwen Jin, Yan dong, Jingnan Gao, Yanfang Wang, Shiyong Guo, Jiancheng State Laboratory of Petroleum Resources and Prospecting Key China University of Petroleum Beijing China CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9780367422844

This paper describes the physical laboratory experiment of oil sand under water injection, including experimental device, sample preparation, experimental design, operating procedure and the results of investigation of displacement sand grains of oil sand sample surface using a non-destructive method called digital Image Correlation (dIC) technique. A specially designed PMMA apparatus is developed to allow control confining pressure and pore pressure application on oil sand put inside it. The experimental procedure consists of an image collection process of images obtained with camera lens placed upon the PMMA slabs. The direction of water injection was always perpendicular to the lenses, and the injected water pressure and volume were recorded by computer. Then, dIC determined image motion was used to achieve displacement field and strain field of tested oil sand sample surface. Thus, the obtained displacement and strain fields could be used for numerical modeling experiments to guide mini-frac implement of oil sand deposit under water injection. © 2020 ISrM.

关键词： rock mechanics

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