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Effects of Trace Cl^(-),Cu^(2+)and Fe^(3+) Ions on the Corrosion Behaviour of AA6063 in Ethylene Glycol and Water Solutions

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 285-303页

作者： Lei Fan Juantao Zhang Hao Wang Yang Liu Yu Cui Cheng Wang Rui Liu Dongxiao Xu State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials CNPC Tubular Goods Research InstituteXi’an 710077China NO.1 Gas production plant of changqing oilfield Company Jingbian 718500China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenyang National Laboratory for Materials Science School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China

The effects of Cl^(-),Cu^(2+)and Fe^(3+)ions and their combinations on the corrosion behaviour of aluminium alloy 6063(AA6063)in ethylene glycol and water solutions at 50°C were investigated by electrochemical and immersion methods.Cl^(-)resulted in pitting corrosion of the alloy.In the Cl^(-)-free solutions,Fe^(3+)was prone to accelerate uniform corrosion,while Cu^(2+)tended to accelerate pitting corrosion.Severe pitting corrosion of AA6063 was observed in the cases of Cl^(-)combined with Cu^(2+)or Fe^(3+),especially in the case of Cl^(-)combined with Cu^(2+)and Fe^(3+)ions.

关键词： Aluminium Polarization Weight loss Pitting corrosion

Modeling of kinetic characteristics of alkaline-surfactant-polymer-strengthened foams decay under ultrasonic standing wave

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Petroleum Science 2022年第4期19卷 1825-1839页

作者： Zhi-Hua Wang Xiao-Yu Liu Hong-Qi Zhang Yong Wang Yun-Fei Xu Bao-Liang Peng Yang Liu Key Laboratory for Enhanced oil&Gas Recovery of the Ministry of Education Northeast Petroleum UniversityDaqingHeilongjiang163318China oil Recovery plant No.3 PetroChina Daqing Oilfield Company LimitedDaqingHeilongjiang163113China Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China

Foaming issues are encountered at the stages in crude oil production, transportation, processing, especially in chemical flooding enhanced oil recovery(EOR) oilfields. These accumulated foams would cause a lot of trouble for downstream operation. The destruction of foams under ultrasonic has been increasingly paying attention in the background of green oilfield development. This study focuses on the decay kinetic characteristics of alkaline-surfactant-polymer-strengthened foams under the ultrasonic standing wave.The performance of the diverse foams was characterized. A decay kinetic model incorporating the energy correlation was developed and validated. The factors that affect the decay kinetic characteristics were discussed. The results indicated that the collapse rate and the collapse volume fraction decreased when the foam size decreased, the gas-liquid ratio decreased and the surface tension increased. Ultrasonic standing wave parameters have a significant impact on the decay behavior of the foam. Both the ultrasonic frequency and ultrasonic amplitude were increased by 50%, the collapse volume fraction of foams increased by about 1.25 times in the identical irradiation time. The relative deviation between the measured results and the model prediction was less than 10%. The potential collapse mechanism was also explained using the principle of energy correlation of foam surface. This study is not only beneficial to provide a robust and rigorous way to defoam of produced liquid in the alkaline/surfactant/polymer(ASP)flooding EOR process but also meaningful to well understand the decay process of oil-based foams.

关键词： Foaming performance Energy correlation model Decay kinetic Collapse mechanism ASP flooding Ultrasonic standing wave

A Dynamic Plunger Lift Model for Shale Gas Wells

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1735-1751页

作者： Shiyu Miao Xiao Liu Xiaoya Feng Haowen Shi Wei Luo Peng Liu Petroleum Engineering Institute of Yangtze University Wuhan430100China Laboratory of Multiphase Pipe Flow Gas Lift Innovation CenterChina National Petroleum Corp.Yangtze UniversityWuhan430100China Key Laboratory of Drilling and production Engineering for oil and Gas Wuhan430100China Sichuan Shale Gas Exploration and Development Limited Liability Company Chengdu640000China Sichuan Changning Gas Development Company PetroChina Southwest Oil&Gas Field CompanyChengdu610051China oil and Gas Technology Research Institute of changqing oilfield Company PetroChinaXi’an710018China

At present,the optimization of the plunger mechanism is shale gas wells is mostly based on empirical methods,which lack a relevant rationale and often are not able to deal with the quick variations experienced by the production parameters of shale gas wells in comparison to conventional gas wells.In order to mitigate this issue,in the present work,a model is proposed to loosely couple the dynamics of gas inflow into shale gas wells with the dynamics of the liquid inflow.Starting from the flow law that accounts for the four stages of movement of the plunger,a dynamic model of the plunger lift based on the real wellbore trajectory is introduced.The model is then tested against 5 example wells,and it is shown that the accuracy level is higher than 90%.The well‘switch’,optimized on the basis of simulations based on such a model,is tested through on-site experiments.It is shown that,compared with the original switch configuration,the average production of the sample well can be increased by about 15%.

关键词： Shale gas well complex and more complex well bore structure plunger lift loose coupling simulation model

Diageneses and Their Influences on Reservoir Properties of Chang 2 oil Member in Renshan Region, Zhidan oilfield, Ordos Basin

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 142-143页

作者： YANG Kang ZHOU Xue LI Hong XIE Wei DONG Yangkun LIU Yongjie SONG Shijun ZHAO Leizhao Department of Geology Northwest University Yongning oil production plant Yanchang Oilfield Co.Ltd

1 Introduction Yanchang Formation in Upper Triassic,Ordos basin contains the most abundant hydrocarbon resources in North China(Wang et al.,2014).The sandstones are the most important oil-bearing reservoirs in Yanchang

关键词： Zhidan oilfield SEM Ordos Basin Diageneses and Their Influences on Reservoir Properties of Chang 2 oil Member in Renshan Region

Application of binding theory for seepage of viscoelastic fluid in a variable diameter capillary

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Journal of Hydrodynamics 2017年第4期29卷 621-631页

作者：杨二龙谷婷婷王梅李欢 Key Laboratory on Enhanced oil and Gas Recovery of the Ministry of Education Northeast Petroleum University Daqing oilfield of China National Petroleum Corporation School of Computer and Information Technology Northeast Petroleum University Second oil production plant of Daqing oilfield of CNPC

The polymer solution for polymer flooding is a viscoelastic fluid. There exist both shear flow and elongational flow when the polymer solution flows in a porous medium, where an additional dissipation is involved. The additional dissipation caused by elongational deformation is often ignored while studying the flow of the fluid in a porous medium. For a complex polymer solution, the generated elongational pressure drop cannot be ignored. In a capillary of fixed diameter, the polymer solution is only impacted by the shear force, and its rheological property is pseudoplastic. Therefore the variable diameter capillary and the converging-diverging flow model with different cross sections are required to describe the flow characteristics of the polymer solution in porous media more accurately. When the polymer solution flows through the port, we have the elongational flow and the polymer molecules undergo elongational deformation elastically. By using the mechanical energy balance principle and the minimum energy principle, a mathematical model of non-Newtonian fluid inlet flow was established by Binding. On the basis of the Binding theory, with the application of the theory of viscoelastic fluid flow in the circular capillary and the contraction-expansion tube, the relations between the viscoelastic fluid flow rate and the pressure drop are obtained.

关键词： Binding theory viscoelastic fluid abrupt contraction capillary permeability rule

Multifunctional single-fiber optical tweezers for particle trapping and transport

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Chinese Optics Letters 2022年第12期20卷 19-24页

作者：吴昊姜春雷田绍鹏邵上钊岳航宇崔翔宇高丙坤王秀芳陈朋 College of Electrical and Information Engineering Northeast Petroleum UniversityDaqing 163318China The Third oil production plant of Daqing oilfield Co. Daqing 163113China

We present and demonstrate a multifunctional single-fiber optical tweezer for particle trapping and transport.The fiber probe of fiber optical tweezers is constructed as a planar structure.Laser sources with wavelengths of 650 nm and 980 nm in a single-mode fiber excite the linearly polarized LP11mode and LP01mode beams,respectively.These two laser beams can achieve non-contact trapping and long-distance transport of particles after passing through a flat-facet fiber probe,respectively.This structure makes it possible to perform non-contact trapping and transport of particles by combining multiple wavelengths and multiple modes.

关键词： fiber optical tweezers particles optical trapping optical transportation

Fracture Mechanism of the Formation with a Natural Flaw Under a Single-Tooth Cutting

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Acta Mechanica Solida Sinica 2020年第5期33卷 719-730页

作者： Siqi Li Wei Li Tie Yan Fuqing Bi Huan Zhao Xin Ling Institute of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina The Fifth oil production plant of Daqing oilfield Daqing163513HeilongjiangChina

The process of a single-tooth cutting formation is taken as the representative to analyze the fracture mechanism of the formation with natural flaws under the PDC drill bit.The modeling of the stress field distribution of the formation under a single tooth is proposed first.Subsequently,the modeling of the stress intensity factor K,T-stress and the initiation angleθof the flaw under two far-field compressive loads in two cases are presented based on the mode-II fracture.Finally,the results of theoretical calculations and simulations are given and discussed.Based on the analysis undertaken,it can be concluded that the confinement ratioλapplying on the flaw changes nonlinearly with the variation inα+φ.The relationship between the dimensionless ratioβx/βy of T-stress and the rotational polar angleφis a parabola with an upward opening.When the direction of the cutting force is consistent with the flaw,the stress intensity factor K and the initiation angleθat the tip of the flaw reach the maximum.In addition,the angle between the cutting force and the flaw weakens the T-stress and inhibits the crack initiation and propagation of the flaw.The results of numerical simulations show good agreement with theoretical calculations.

关键词： Single-tooth cutting Stress field Stress intensity factor Initiation angle Extended finite element

Optimal Concentration of the Bubble Drainage Agent in Foam Drainage Gas Recovery Applications

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Fluid Dynamics & Materials Processing 2023年第12期19卷 3045-3058页

作者： Shaopeng Liu Guowei Wang Pengfei Liu Dong Ye Jian Song Xing Liu Yang Cheng Second Gas production plant of Qinghai oilfield Branch Jiuquan736202China School of Petroleum Engineering Yangtze UniversityWuhan430100China Petrochina Multiphase Flow Laboratory of Gas Lift Innovation Cente Wuhan430100China

Foam drainage is theflow of liquid through the interstitial spaces between bubbles driven by capillarity and grav-ity and resisted by viscous damping.The so-called foam drainage gas recovery technology is a technique tradi-tionally used to mitigate the serious bottom-hole liquid loading in the middle and late stages of gas well production.In this context,determining the optimal concentration of the bubble drainage agent is generally cru-cial for the proper application of this method.In this study,a combination of indoor experiments and theoretical analysis have been used to determine the pressure drop related to the foam-carrying capacity in a representative gasfield.Dynamic and static experiments were designed with a bubble drainage agent concentration varying in the range 0.3%–0.6%.Using thefield formation water data,the optimal soaking agent concentration was obtained and pressure drop test experiments on the foam carrying capacity were conducted accordingly.These tests have revealed that the optimal foam displacement agent concentration is 0.5%,and the foam quality at the optimum concentration is between 0.78–0.98.A theoretical method for calculating the pressure drop at the optimum soak-away concentration based on experimental data has also been introduced.The error of the proposed method is within 15%compared to the experimental measured value,demonstrating that it is highly accurate and simple.

关键词： Bubble row pressure drop foam quality liquid carrying capacity flow pattern

A novel method for predicting breakthrough time of horizontal wells in bottom water reservoirs

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Journal of Central South University 2013年第12期20卷 3612-3619页

作者：李立峰岳湘安赵海龙杨志国张立娟 MOE Key Laboratory of Petroleum Engineering in China (University of Petroleum) 1st oil production plant of Jiangsu oilfield Company SINOPEC

Dimensional analysis and numerical simulations were carried out to research prediction method of breakthrough time of horizontal wells in bottom water reservoir. Four dimensionless independent variables and dimensionless time were derived from 10 influencing factors of the problem by using dimensional analysis. Simulations of horizontal well in reservoir with bottom water were run to find the prediction correlation. A general and concise functional relationship for predicting breakthrough time was established based on simulation results and theoretical analysis. The breakthrough time of one conceptual model predicted by the correlation is very close to the result by Eclipse with less than 2% error. The practical breakthrough time of one well in Helder oilfield is 10 d, and the predicted results by the method is 11.2 d, which is more accurate than the analytical result. Case study indicates that the method could predict breakthrough time of horizontal well under different reservoir conditions accurately. For its university and ease of use, the method is suitable for quick prediction of breakthrough time.

关键词：突破时间时间预测底水油藏水平井 Eclipse 量纲分析数值模拟影响因素