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investigation of the influences of asphaltene deposition on oilfield development using reservoir simulation

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Petroleum Exploration and Development 2022年第5期49卷 1138-1149页

作者： TANANYKHiN D S STRUCHKOV I A KHORMALi A ROSCHiN P V Saint-Petersburg Mining University Saint-Petersburg 199106Russia LLC Tyumen Petroleum Research Center Tyumen 625000Russia Department of Chemistry Faculty of Basic Sciences and EngineeringGonbad Kavous UniversityGonbad Kavous 49717-99151Iran LLC SamaraNiPineft Samara 443010Russia

This paper investigates the deposition of asphaltenes in the porous medium of the studied field in Russia and predicts production profiles based on uncertainty evaluation. This problem can be solved by dynamic modeling, during which production profiles are estimated in two scenarios: with and without the activation of the asphaltene option. Calculations are carried out for two development scenarios: field operation under natural depletion and water injection into the aquifer as a reservoir pressure maintenance system. A full-scale compositional reservoir simulation model of the Russian oilfield was created. Within a dynamic simulation, the asphaltene option was activated and the asphaltene behavior in oil and porous medium was tuned according to our own special laboratory experiments. The model was also matched to production historical data, and a pattern model was prepared using the full-scale simulation model. Technological and the asphaltene option parameters were used in sensitivity and an uncertainty evaluation. Furthermore, probable production profiles within a forecast period were estimated. The sensitivity analysis of the pattern model to input parameters of the asphaltene option allowed determining the following heavy-hitters on the objective function: the molar weight of dissolved asphaltenes as a function of pressure, the asphaltene dissociation rate, the asphaltene adsorption coefficient and the critical velocity of oil movement in the reservoir. Under the natural depletion scenario, our simulations show a significant decrease in reservoir pressure and the formation of drawdown cones leading to asphaltene deposition in the bottom-hole area of production wells, decreasing their productivity. Water injection generally allows us to significantly reduce the volume of asphaltene phase transitions and has a positive effect on cumulative oil production. injecting water into aquifer can keep the formation pressure long above the pressure for asphaltene precipitation, preventing the asphaltene deposition resul

关键词： oilfield development asphaltene deposition uncertainty evaluation sensitivity analysis compositional reservoir simulation

液态二氧化碳对俄罗斯某油藏稠油的膨胀与萃取作用实验

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石油勘探与开发 2018年第5期45卷 861-868页

作者： LOBANOV A A SHHEKOLDiN K A STRUCHKOV I A ZVONKOV M A HLAN M V PUSTOVA E J KOVALENKO V A ZOLOTUKHiN A B Northern(Arctic)Federal University ArkhangelskRussian Federation JSC RiTEK SamaraRussian Federation Saint-Petersburg Mining University Saint PetersburgRussian Federation

利用俄罗斯某油藏稠油样品,通过实验分析稠油与液态CO_2混合后两者之间的质量传递作用以及混合物中重相(稠油和CO_2的混合物)和轻相(纯CO_2)的特性变化。研究表明,当混合物中CO_2浓度为10%时,稠油基本上不发生膨胀;当混合物中CO_2浓度高... 详细信息

利用俄罗斯某油藏稠油样品,通过实验分析稠油与液态CO_2混合后两者之间的质量传递作用以及混合物中重相(稠油和CO_2的混合物)和轻相(纯CO_2)的特性变化。研究表明,当混合物中CO_2浓度为10%时,稠油基本上不发生膨胀;当混合物中CO_2浓度高于26%时,由于稠油轻质组分的萃取量超过了CO_2在稠油中的饱和量导致重相体积减少,重相黏度呈指数增长,混合物中CO_2的浓度为26%时,有效降低重相黏度的作用最强;重相和轻相密度、体积系数、气体溶解度和闪蒸重相黏度均随着混合物中CO_2浓度的增加而变大;混合物中最佳的CO_2浓度是26%,此时稠油膨胀最大、重相的黏度值最小;混合物中CO_2的浓度为10%~26%时,轻相的体积最小,驱油效果最好。

关键词：提高采收率 CO2 稠油膨胀实验萃取实验相态特征

Swelling/extraction test of Russian reservoir heavy oil by liquid carbon dioxide

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Petroleum Exploration and Development 2018年第5期45卷 918-926页

作者： LOBANOV A A SHHEKOLDiN K A STRUCHKOV I A ZVONKOV M A HLAN M V PUSTOVA E J KOVALENKO V A ZOLOTUKHiN A B Northern Arctic Federal University JSC RiTEK Saint-Petersburg Mining University

The mass transfer between heavy oil and liquid carbon dioxide and the changes of the heavy phase(mixture of heavy oil and CO_2) and light phase(pure CO_2) in the mixture were tested in lab with heavy oil samples from Russia. The experimental results showed that the heavy oil hardly expanded when the concentration of carbon dioxide in the mixture was 10%. When the concentration of carbon dioxide was higher than 26%, the volume of the heavy phase decreased, and the viscosity of the heavy phase increased exponentially as the light components extracted from the heavy oil exceeded the carbon dioxide saturated in the heavy oil. When the concentration of carbon dioxide in the mixture was 26%, the effect of viscosity reducing to the heavy phase was the strongest. The density of the light and heavy phases, volume factor, and solubility of gas and flash viscosity of heavy phase all increased with the rise of carbon dioxide concentration in the mixture. The best concentration of carbon dioxide in the mixture was 26%, when the heavy oil expanded the most and the viscosity of the heavy phase was the lowest. When the concentration of carbon dioxide in the mixture was between 10% and 26%, the volume of the light phase was the smallest and the oil displacement effect was the best.

关键词： enhanced oil recovery liquid CO2 heavy oil swelling test extract test phase behavior

Ozone Therapy in Patients with Burn Disease

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Journal of Biomedical Science and Engineering 2018年第2期11卷 27-35页

作者： Andrew K. Martusevich Sergey P. Peretyagin Mikhail V. Ruchin Andrew A. struchkov Privolzhsky Federal Medical Research Centre Nizhny Novgorod Russia Association of Russian Ozone Therapeutists Nizhny Novgorod Russia Nizhny Novgorod State University Named after N.i. Lobachevsky Nizhny Novgorod Russia

Objectives. Using of systemic ozone therapy connecting with antioxidants in early period of burn disease for detoxication and metabolic disorders correction is investigated. Materials and Methods. We used active preventive metabolic detoxication in early period of burn disease (5th - 15th days after shock stage). it includes, besides complex infusion and transfusion therapy and classic pharmacological treatment, employment of antioxidants with succinic acid (reamberin, mexidol), systemic ozone therapy (intravenous injections of ozonated sodium chloride solution with ozone concentration 120 - 240 μg/mL;saturating ozone concentration in gas flow—5000 μg/L, sparging speed—2 l/min), major autohemotherapy (twice a week;ozone dose—250 - 300 μg/mL) and monitor cleansing of bowels with rectal ozone insufflations (ozone dose—1000 μg/mL). Estimation of personal oxidant dose and treatment effectiveness is carried out by biochemiluminescence control of pro- and antioxidant system state. Complex patient study also includes endotoxicosis markers (blood level of glucose, creatinine, bilirubin, urea and intermediate molecular weight peptides), proteolytic enzymes activity (tripsin, antitripsin, elastase), cardiovascular and microcirculation function examination (tetrapolar rheography, spirography, laser Doppler flowmetry) at burn disease dynamics. We formed two patients groups: first control group (20 burned patients) received a traditional therapy;second group (20 burned patients) got a described detoxication complex additional to treatment of first group. All patients had large burns (more than 20% body square). indications for parenteral ozone therapy are signs of hypoxia (hypoxemia, elevated lactate level, depressed lactate dehydrogenase activity) and toxemia (increased blood level of glucose, creatinine, urea, intermediate molecular weight peptides, fibrine degradation products, lypoperoxidation intensification);cardiovascular dysfunction;respiratory function disorders. Results. Method of ozone dose individualization in int

关键词： Burn Therapy Endotoxicosis Detoxication Ozone Therapy Antioxidants

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中国与俄罗斯生态旅游比较研究

中国与俄罗斯生态旅游比较研究

作者：皮特·斯特鲁奇科夫（Petr. struchkov）渤海大学

学位级别：硕士

从可持续发展的角度来看,在旅游业中发展生态旅游可以减少传统旅游对环境的负面影响,增加当地居民收入,带动当地经济发展,并能够落实环境教育,提高民众的生态环保意识,可以实现生态旅游的环境效益、社会效益和经济效益综合利益最大化。... 详细信息

从可持续发展的角度来看,在旅游业中发展生态旅游可以减少传统旅游对环境的负面影响,增加当地居民收入,带动当地经济发展,并能够落实环境教育,提高民众的生态环保意识,可以实现生态旅游的环境效益、社会效益和经济效益综合利益最大化。在这种情况下,生态旅游是真正为自然保护区的发展筹集资金的可能性,在某些情况下,为国家获得额外的外汇。它为当地创造就业机会、提高生活水平和发展经济创造了有利条件。因此,本文从俄罗斯和中国生态旅游的现状分析入手。以比较分析两国在发展可持续生态旅游方面的经验,并得出明确的研究结论,针对存在的问题提出改进建议。为达到预期的研究目标,首先分析了相关产业的概括和生态旅游在国家经济中的作用等基础性理论问题,并对生态旅游的分类与特征以及生态旅游国家规制的法律框架等进行了研究。为了了解俄罗斯和中国生态旅游发展的现状、潜力和前景,本文分析了两国的自然和经济资源、生态旅游的收入和支出以及旅游发展国家规划方案。在研究过程中分别采用了理论方法、实证方法、系统分析法和比较分析法等研究方法。这项研究的资料库是俄罗斯联邦国家统计委员会、统计和海关当局的数据。本文的内容主要包括五部分。第一部分论文基本情况介绍,包括研究背景、研究方法、文献综述等;第二部分为研究的理论基础分析,包括生态旅游的相关概念,生态旅游的基本特征,生态旅游的分类,生态旅游的管理体系,当前生态旅游发展中面临的主要问题等;第三部分为本文的重点内容主要对中国和俄罗斯的生态旅游发展进行对比研究,具体包括全球生态旅游的发展趋势与展望,生态旅游在中国和俄罗斯的发展情况,中国和俄罗斯生态旅游发展现状对比,中国和俄罗斯生态旅游市场的比较研究,中国和俄罗斯生态旅游发展潜力与前景的对比分析,中国和俄罗斯生态旅游发展成功经验的总结。第四部分为促进中国和俄罗斯生态旅游发展的对策建议,包括中国和俄罗斯生态旅游游客相互交流情况,对比分析中国和俄罗斯生态旅游相关的政策和效率,提高生态旅游发展的对策建议。第五部分为本论文的结论。在深入的研究之后,本文得出了明确的结论:（1）生态旅游的健康发展必须保证生物多样性保护工作与生态旅游的有机融合;（2）制约生态旅游与生物多样性保护有效合作的关键在于生态旅游活动收入的最优分配机制的建立:必须将生态旅游部分收入用于改善自然保护区的保护、研究和管理之中。（3）通过成本和费用的最佳组合,可以在政府支持和旅游收入之间实现平衡。（4）在政府积极保护自然环境的国家,生态旅游得到了各级政府的大力支持,生态旅游的政策体系逐步建立,环境工作成为政府各项工作的重要组成部分。

关键词：生态旅游中国俄罗斯比较分析发展前景

The genetics of race differentiation——should it be studied?

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National Science Review 2023年第4期10卷 6-7页

作者： Chung-i Wu NSR School of Life Sciences Sun Yat-sen University

in this issue, NSR publishes an article entitled ‘Expression profiles of east-west highly differentiated genes in Uyghur genomes’ by Ning et al.(2023) [1]. Briefly, it is about the regulation of gene expression in Uyghur genomes, which are admixed between Asian and European genomes. in evolutionary terms, this is a case of post-isolation secondary contact over a time span of thousands of years. in most other cases, such as African Americans, the admixture has a time span of <300 years. Furthermore,

关键词： DROSOPHiLA-MELANOGASTER iNCiPiENT SPECiATiON SEXUAL iSOLATiON

Applications and theoretical perspectives of artificial intelligence in the rate of penetration

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Petroleum 2022年第2期8卷 237-251页

作者： Chinedu i.Ossai Ugochukwu i.Duru Faculty of Health Arts and DesignSwinburne UniversityJohn Street HawthornVictoria3122Australia Federal University of Technology Owerri Nigeria

Artificial intelligence(Ai)is becoming popular for the Rate of Penetration(ROP)estimation,hence,the need to study the best techniques and their advantages over empirical models.Various literatures were analysed to determine the prevalence of Ai in ROP computation and compare the computation accuracies with empirical models.Artificial Neural Network(ANN)accounted for over 92%of the Ai techniques used for ROP computation and Weight on Bit(WOB)mostly influenced the computation accuracy.The accuracy of Ai algorithms is better than the empirical models thus,will improve the drilling efficiency,reduce cost and enhance the development of pad wells.

关键词： Artificial intelligence Drilling operations Rate of penetration optimization Artificial neural network Weight on bit

Corporate governance in generating companies of the Russian electric power industry in the context of ESG agenda

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Global Energy interconnection 2022年第5期5卷 512-523页

作者： Galina i.Sheveleva Melentiev Energy Systems institute of Siberian Branch of the Russian Academy of Sciences 130 Lermontov St.Irkutsk 664033Russia

To address the issues of investment appeal in the Russian electric power industry,this study analyzes the dynamics of corporate governance,including permanent redistribution of property and compliance with the Russian Corporate Governance Code,in wholesale and territorial-generating companies.The increasing concentration of property in the hands of the state and its implications for investors are also noted.This study reveals the violations of essential principles,and the substantial differences in corporate governance practices,in the best-and worst-performing companies.Additional standards for better corporate governance practices to benefit the investors in the context of the current Environmental,Social,and corporate Governance(ESG)agenda are proposed.This study provides a new insight at the development of corporate governance in Russian power generating companies through property redistribution and compliance with corporate governance principles.

关键词： Corporate governance Russian power generating companies ESG agenda

Vertical seismic absorber utilizing inertance and negative stiffness implemented with gas springs

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Earthquake Engineering and Engineering Vibration 2023年第1期22卷 225-241页

作者： Kalogerakou M Paradeisiotis A Antoniadis i Dynamics and Structures Laboratory School of Mechanical EngineeringNational Technical University of Athens15780 AthensGreece

A novel implementation of negative stiffness elements(NSEs)is proposed,utilizing industrial grade nitrogen gas springs as pre-stressed stiffness elements in a configuration with lever arms.This NSE is combined with an inerter to form a stiff dynamic absorber(SDA)for vertical seismic protection of structures with base isolation.The SDA is optimized to minimize vertical accelerations while ensuring static structural integrity,excellent damping performance and containment of relative displacements.The introduction of gas springs in place of conventional linear springs addresses important practical limitations through features of non-linearity and industrial grade manufacturing.The proposed implementation is dimensioned for a 50-ton structure and evaluated numerically for 25 actual earthquake records,in comparison with a linear SDA model and an equivalent conventional damper(CD).individual and averaged results of acceleration and displacement time histories demonstrate vastly superior response compared to CD regarding induced accelerations for similar displacements.Performance equivalency with the linear SDA model indicates the stability of the gas spring implementation while guaranteeing predictability,tested endurance,proper tolerances,and off-axis motion resistance without requiring additional guiding components,as opposed to conventional springs.These features render the proposed implementation a promising solution for the realization of NSEs in seismic protection.

关键词： negative stiffness gas springs vertical seismic protection KDamper inerter