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Establishment of Unstable Flow Model and Well Testing Analysis for Viscoelastic Polymer Flooding

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World Journal of Engineering and Technology 2023年第2期11卷 273-280页

作者： Zheng Lv meinan wang Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch Tianjin China

At present, the polymer solution is usually assumed to be Newtonian fluid or pseudoplastic fluid, and its elasticity is not considered on the study of polymer flooding well testing model. A large number of experiments have shown that polymer solutions have viscoelasticity, and disregarding the elasticity will cause certain errors in the analysis of polymer solution seepage law. Based on the percolation theory, this paper describes the polymer flooding mechanism from the two aspects of viscous effect and elastic effect, the mathematical model of oil water two-phase three components unsteady flow in viscoelastic polymer flooding was established, and solved by finite difference method, and the well-test curve was drawn to analyze the rule of well test curve in polymer flooding. The results show that, the degree of upward warping in the radial flow section of the pressure recovery curve when considering polymer elasticity is greater than the curve which not considering polymer elasticity. The relaxation time, power-law index, polymer injection concentration mainly affect the radial flow stage of the well testing curve. The relaxation time, power-law index, polymer injection concentration and other polymer flooding parameters mainly affect the radial flow stage of the well testing curve. The larger the polymer flooding parameters, the greater the degree of upwarping of the radial flow derivative curve. This model has important reference significance for well-testing research in polymer flooding oilfields.

关键词： Polymer Flooding Viscoelasticity Well Testing Mathematical Model Seepage Law

The relationship between indoor air quality(IAQ)and perceived air quality(PAQ)-a review and case analysis of Chinese residential environment

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Energy and Built Environment 2024年第2期5卷 230-243页

作者： Jingjing Pei meinan Qu Luyao Sun Xueyong wang Yihui Yin Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300072China

Due to the majority of time people spent indoors,indoor air quality is not only critical to people’s health,comfort,but can also significantly influence occupants perception on indoor *** quality is closely related to many factors including thermal parameters,pollutant concentrations,and ventilation ***,the current building indoor air quality evaluation method is based the objective measurement of indoor parameters,without considering occupants’subjective *** paper is aimed at summarizing a profound review on the PAQ evaluation *** among various PAQ evaluating methods with advantages,similarities and differences were *** of literatures about indoor air quality in Chinese residential buildings field is also summarized,and discussion on the subjective influence of temperature and relative humidity,venti-lation performance,volatile organic compounds(VOCs)concentration,and particulate matters on perceived air quality is carried out.

关键词： Perceived air quality Temperature and relative humidity Volatile organic compound Ventilation Particulate matter

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Journal of Integrative Agriculture 2018年第11期17卷 2478-2491页

作者： Sumaira Farrakh meinan wang Xianming Chen Department of Plant Pathology Washington State University Department of Biosciences COMSATS Institute of Information Technology USDA-ARS Wheat Health Genetics and Quality Research Unit

Interactions of the stripe rust pathogen （Puccinia striiformis f. sp responses. Among various genes involved in the plant-pathogen related （PR） protein genes determine different defense responses tritici） with wheat plants activate a w^ae range OT nost nteractions, the expressions of particular pathogenesis-Different types of resistance have been recognized and utilized for developing wheat cultivars for resistance to stripe rust. All-stage resistance can be detected in seedling stage and remains at high levels throughout the plant growth stages. This type of resistance is race-specific and not durable. In contrast, plants with only high-temperature adult-plant （HTAP） resistance are susceptible in seedling stage, but become resistant when plants grow older and the weather becomes warmer. HTAP resistance controlled by a single gene is partial, but usually non-race specific and durable. The objective of this study was to analyze the expression of PR protein genes involved in different types of wheat resistance to stripe rust. The expression levels of 8 PR protein genes （PR1, PRI.2, PR2, PR3, PR4, PR5, PR9 and PRIO） were quantitatively evaluated at 0, 1, 2, 7 and 14 days after inoculation in single resistance gene lines of wheat with all-stage resistance genes YrTrl, Yr76, YrSP and YrExp2 and lines carrying HTAP resistance genes Yr52, Yr59, Yr62 and Yr7B. Races PSTv-4 and PSTv-37 for compatible and incompatible interactions were used in evaluation of PR protein gene expression in wheat lines carrying all-stage resistance genes in the seedling- stage experiment while PSTv-37 was used in the HTAP experiment. Analysis of quantitative real-time polymerase chain reaction （qRT-PCR） revealed that all of the PR protein genes were involved in the different types of resistance controlled by different Yr genes. However, these genes were upregulated at different time points and at different levels during the infection process among the wheat lines with different Yr genes for eith

关键词： wheat stripe rust plant resistance pathogen-related protein qRT-PCR

Research on Optimization Design of Deep Profile Control Injection Scheme in Block S

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Open Journal of Applied Sciences 2023年第11期13卷 2047-2054页

作者： meinan wang Shaopeng wang Wei Zhang Xiaoqi Chen Junting Zhang Bohai Oilfield Research Institute of CNOOC Ltd.-Tianjin Branch Tianjin China

In view of the rapid decline rate of oil production and gradual increase of water cut in oil wells in Block S, based on the determination of the formula of foam profile control agent, the optimization study of foam profile control injection scheme was carried out. Petrel software is used to establish a facies controlled geological model based on stochastic modeling method in Block S, and CMG software is used for numerical simulation to design 7 sets of foam profile control prediction schemes. Dynamic data and numerical simulation methods are used to optimize foam injection mode and injection cycle. By simulating and calculating, the optimal injection method of alternating gas and liquid injection and the optimal plan with an injection period of 2 months were selected. Through the calculation results of various research plans, it can be seen that the water content of the optimal plan has decreased significantly, and the oil production rate has increased significantly, in order to slow down production decline, control water content rise, extend the economic recovery period of the oilfield, and achieve the goal of improving oil recovery.

关键词： Foam Profile Control Numerical Simulation Injection Method Injection Cycle

Study on Optimization of Polymer Enhanced Foam Formulation System

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Engineering（科研） 2023年第11期15卷 742-748页

作者： meinan wang Yuejie wang Hongyou Zhang Xiaoyan Yang Xiaoming Chen Bohai Oilfield Research Institute of CNOOC Ltd.—Tianjin Branch Tang Gu Tianjin China

Taking the pilot test area of polymer enhanced foam flooding in Y oilfield as the prototype, a numerical core model was established, and the polymer enhanced foam formulation system was optimized by analyzing the resistance factor and the change rule of oil recovery of different formulation systems. Research shows that the higher the polymer concentration, the greater the resistance factor, and the more obvious the sealing effect formed in the formation. The concentration of surfactant has a greater impact on the resistance factor. With the increase of surfactant concentration, the resistance factor increases significantly, and the plugging effect of foam agent on core is significantly enhanced. With the increase of gas-liquid ratio, the resistance factor first increases and then decreases. When the gas-liquid ratio is 1:1, the resistance is the largest, and the foam agent has the strongest plugging effect on the core. The optimal formula system of polymer enhanced foam flooding in Y oilfield is: polymer concentration is 1200 mg/L, surfactant concentration is 0.25 wt%, gas-liquid ratio is 1:1.

关键词： Enhanced Foam Polymer Concentration Surfactant Concentration Gas-Liquid Ratio

Effect of Alkaline Electrolyzed Water on Performance Improvement of Green Concrete with High Volume of Mineral Admixtures

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Journal of Renewable Materials 2021年第11期9卷 2051-2065页

作者： Guibin Liu meinan wang Qi Yu Qiuyi Li Liang wang Center for Technological Development Qingdao Qingjian New Material Group Co.Ltd.Qingdao266108China College of Civil Engineering&Architecture Qingdao Agricultural UniversityQingdao266109China

The strength and durability of concrete will be significantly reduced at high volume of mineral admixture,and the poor early strength of concrete also still needs to be *** this investigation,a highly active alkaline electrolyzed waters was used as mixing water to improve the early strength and enhance the durability of green concrete with high volume mineral admixture,the influences of alkaline electrolyzed water(AEW)on hydration activity of mineral admixture and durability of concrete were *** results showed that compared with natural tap water,AEW can accelerate early hydration process of cement in concrete and produce comparatively more hydrated products,leading to a 13.6%higher compressive strength than that of ordinary concrete at early age,but the improvement effect of AEW concrete was relatively reduced at long-term ***,the activity of mineral admixtures could be stimulated by AEW to some extent,the strength and durability performance of AEW concrete after double doping 25%slag and 25%fly ash can still reach the level of ordinary cement concrete without mineral *** SEM micromorphology of 7 d hydrated natural tap water cement paste was observed to be flaky and tabular,but the AEW cement pastes present obvious cluster and granulation *** SEM microstructure of AEW concrete with mineral admixtures is more developed and denser than ordinary tap water concrete with mineral ***,the AEW probably could realize the effective utilization of about 50%mineral admixture amount of concrete without strength loss,the cement production cost and associated CO_(2) emission reduced,which has a good economic and environmental benefit.

关键词： Alkaline electrolyzed water durability improvement green concrete mineral admixture micromorphology

Diagnostic Method and Adaptability Analysis of Multiple Water Breakthroughs in Horizontal Well in Combined Well Pattern

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Journal of Geoscience and Environment Protection 2023年第5期11卷 150-158页

作者： Zheng Lv meinan wang Guohao Zhang Rui Zhang Jianguo Liu Bohai Oilfield Research Institute of CNOOC Ltd.-Tianjin Branch Tianjin China

The combined well pattern has been widely used in reservoir development, with a common pattern being a horizontal well in the center for oil production and multiple vertical wells around for water injection. For this type of well pattern, determining the horizontal well is affected by which injection wells, especially when the injecting water breaks through, accurately determining the direction of water inflow will provide an important basis for targeted water well measures. Based on the production performance data of horizontal wells, the semi logarithmic relationship curves of water-oil ratio, derivative water-oil ratio, and cumulative production were used for the first time to determine the breakthrough problem of water injection in the surrounding water injection wells of horizontal wells based on their response characteristics. The adaptability of this method under different influencing factors was analyzed. Introducing the parameter of cumulative production not only preserves the variation trend of the derivative of water-oil ratio with time, but also facilitates the processing of actual production data.

关键词： Combined Well Pattern Multiple Water Breakthroughs in Horizontal Derivative of Water-Oil Ratio

Optimization of Injection Parameters for Profile Control and Flooding in an Oilfield during High Water Cut Period

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Journal of Geoscience and Environment Protection 2023年第11期11卷 73-81页

作者： meinan wang Hui Cai Xiaoqi Chen Junting Zhang Yue Xie Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch Tianjin China

In order to improve the effect of water control and oil stabilization during high water cut period, a mathematical model of five point method well group was established with the high water cut well group of an Oilfield as the target area, the variation law of water cut and recovery factor of different injection parameters was analyzed, and the optimization research of injection parameters of polymer enhanced foam flooding was carried out. The results show that the higher the injection rate, the lower the water content curve, and the higher the oil recovery rate. As the foam defoamed when encountering oil, when the injection time was earlier than 80% of water cut, the later the injection time was, the better the oil displacement effect would be. When the injection time was later than 80% of water cut, the later the injection time was, the worse the oil displacement effect would be. The larger the injection volume, the lower the water content curve and the higher the recovery rate. After the injection volume exceeded 0.2 PV, the amplitude of changes in water content and recovery rate slowed down. The optimal injection parameters of profile control agent for high water content well group in Oilfield A were: injection rate of 15 m3/d, injection timing of 80% water content, and injection volume of 0.2 PV.

关键词： High Water Cut Period Profile Control Injection Rate Injection Timing Injection Volume

Gene expression profiling of Puccinia striiformis *** during development reveals a highly dynamic transcriptome

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Journal of Genetics and Genomics 2011年第8期38卷 357-371页

作者： Xueling Huang Xianming Chen Tristan Coram meinan wang Zhensheng Kang State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection Northwest A&F University Yangling Shaanxi 712100 PR China Department of Plant Pathology Washington State University Pullman WA 99164-6430 USA United States Department of Agriculture Agricultural Research Service Wheat Genetics Quality Physiology and Disease Research Unit Pullman WA 99164-6430 USA

Puccinia striiformis f. sp. tritici （PsO causes stripe rust, one of the most important diseases of wheat worldwide, cDNA libraries had been constructed from urediniospores, germinated urediniospores and haustoria. However, little is known about the expression patterns of the genes related to the infection process and sporulation of the pathogen. In this study, a custom oligonucleotide microarray was constructed using sequences of 442 gene transcripts selected from Pst cDNA libraries. The expression patterns of the genes were determined by hybridizing the microarray with cDNA from Pst in vitro and Pst-infected wheat leaves. The time course study identified 55 transcripts that were differentially expressed during the infection process in a compatible interaction. They were identified to have functions related to the following biological processes, including carbohydrate and lipid metabolism, energy, cell signaling, protein synthesis, cell structure and division. In an incompatible interaction, 17 transcripts of the pathogen were differentially expressed in resistant wheat leaves inoculated with an avirulent Pst race, ten of which had similar expression patterns to those in the compatible interaction. Several candidates for pathogenicity and virulence/avirulence related genes were also identified. The results of quantitative real-time PCR validated the expression patterns of some selected genes. The study demonstrates that the custom oligonucleotide microarray technology is useful to determine the expression patterns of the pathogen genes involved in different types of the host--pathogen interactions and stages of development.

关键词： Puccinia striifonnis Stripe rust Yellow rust Expression profiling Microarray Wheat