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  • پریا صمدی پرویزنژاد، علی محقر*
    هدف

    هدف اصلی پژوهش، تحلیل پویایی میزان صادرات و درآمد فروش نفت و گاز در افق زمانی 2050 می باشد. افزایش صادرات نفت به عنوان مهم ترین منبع تامین ارز، پتانسیل ایجاد منبع درآمدی کلیدی برای کشور دارد؛ بنابراین، سیستمی پویا برای پیش بینی صادرات و درآمد فروش نفت در آینده نیاز می باشد که مستلزم در نظر گرفتن روابط علی و معلولی بین متغیرهای تاثیرگذار بر مساله اصلی پژوهش است.

    روش شناسی پژوهش:

     این پژوهش از لحاظ هدف کاربردی و از لحاظ ماهیت موضوع توصیفی-تحلیل است که از مدل سازی سیستم پویا برای ساخت مدل استفاده شده است. نمودار جریان مدل پژوهش با استفاده از متغیرهای مورد تایید خبرگان و روابط علی معلولی در نرم افزار ونسیم طراحی شده است.

    یافته ها

    دو حلقه مثبت رشد فروش نفت و گاز و رشد بهره برداری از ظرفیت میادین نفت و گاز و سه حلقه منفی محدودیت ظرفیت در میادین نفت و گاز، محدودیت در بهره برداری ظرفیت میادین نفت و گاز و حلقه سوم با محدودیت دسترسی پذیری به منابع نفتی ایجاد شد. همچنین در مدل سیستم پویا سه سناریو خوش بینانه، میانه رو و بدبینانه شبیه سازی شدند. در سناریو اول شبیه سازی بر اساس تغییرات پارامتر قیمت نفت در سال های آینده انجام گرفت. میزان رشد صادارات نفت و گاز در این  سناریو %38 به دست آمد. در سناریوی دوم درآمد حاصل از صادرات به صورت خوش بینانه رشد هشت برابری نشان داد و در نهایت در بدبینانه ترین سناریو نمودارهای طراحی شده نشان داد که مقادیر متغیرهای حالت ثابت می ماند. در نهایت اعتبارسنجی با استفاده از تحلیل سناریوهای مختلف برای مدل سیستم پویا انجام گرفت.

    اصالت/ارزش افزوده علمی:

     در این مقاله علاوه بر تحلیل پویایی عوامل موثر در متغیرهای صنعت نفت و گاز، تاثیرات زمانی این تغییرات نیز مورد توجه قرارگرفته است. در مطالعات قبلی سناریوهای آینده صنعت نفت و گاز، صرفا با متغیرهای توسعه اقتصادی انجام شده است، در حالی که در این پژوهش مقادیر سایر متغیرها نظیر ظرفیت تولید، مخازن موجود و ریسک بازارها در افق زمانی 2050 در مدل پویا برای سناریوها به عنوان متغیر اصلی در نظر گرفته شده است.

    کلید واژگان: مدل پویای صنعت نفت و گاز، پیش بینی صادرات نفت و گاز، سناریوهای فروش نفت و گاز
    Paria Samadi Parviznejad, Ali Mohaghar *
    Purpose

    The main purpose of this paper is a dynamic analysis of oil and gas exports and sales income in 2050. A dynamic system is needed to forecast the export and sales of oil in the future, which requires considering the cause-and-effect relationships between the variables affecting the main research problem.

    Methodology

    This paper is applied in terms of purpose, which uses dynamic system modeling to create the model.

    Findings

    Two positive causal loops of oil and gas sales growth and oil and gas field capacity utilization growth, and three negative causal loops of capacity limitations in oil and gas fields, limitations in oil and gas field capacity utilization, and the third was created with the limitation of access to oil resources. Also, three optimistic, moderate, and pessimistic scenarios were simulated in the dynamic system model. In the first scenario, the simulation was performed based on the changes in the oil price parameter in the future. In this scenario, oil and gas exports grew by 38%. In the second scenario, the income from exports showed an eight-fold growth optimistically. Finally, in the pessimistic scenario, the graphs showed that the values of the state variables remained constant. Finally, the validation was done using the analysis of different scenarios for the dynamic system model.

    Originality/Value:

     In this paper, in addition to the dynamic analysis of the factors influencing oil and gas industry variables, the time effects of these changes have also been considered. Previous studies have only used economic development variables to predict the future of the oil and gas industry. In this paper, the values of other variables, such as production capacity, existing reservoirs, and market risk, are considered as the main variables in the dynamic model for scenarios in the time horizon of 2050.

    Keywords: Dynamic Model Of Oil, Gas Industry, Oil, Gas Export Forecast, Gas Sales Scenarios
  • Mohd Amran Mohd Daril, Abd. Rahim Sidek *, Mohamad Ikbar Abdul Wahab, Khairanum Subari, Sobia Irum, Nohman Khan
    This research sought to identify the best welding processes with the lowest de-fective rate. It is important to select the most appropriate welding process for a certain condition, such as welding, taking into consideration technical and eco-nomic viability. This study will help the key person in the organisation make the right decision on the selection welding process. The existence of many welding processes on the market, each with their own sets of advantages and disad-vantages, makes determining the optimal welding process for a given situation challenging. As a result, selecting which welding process would provide the best welding quality at the lowest cost is critical to the success of any company's mar-ket strategy. There are three (3) variables that will be further investigated, which are: weld-ing process (WP), defective rate (DR), and types of welding defect (WD). This study will analyse welder data from the welding department in MMHE, Pasir Gudang, Johor. The software that is going to be used is Minitab and SPSS. The re-search methodology starts with data collection, data screening, description analy-sis, inferential statistical analysis, independent sample t-test, correlation analysis, and regression analysis. The result of the analysis shows that there is a correlation between WP versus DR and WP versus WD, but it is a weak correlation. The re-sults also show that SAW is the best welding process and contributes almost no defects. The SAW process is the right choice for fabricators to use in the structural fabrication industry. However, due to time constraints, probably the cost factor of SAW process is slightly higher than other welding processes not discussed in this study
    Keywords: Defective Rate, Welding Defect, oil, gas, SAW Process
  • Victoria O. Emelu, Charles Emelu, Bolaji B Babatunde, Elekwachi Wali, Omobolaji Oluwamuyiwa Afolabi *
    Corrosion in pipelines is one of the significant challenges faced by oil and gas industries which has led to the need for corrosion preventive measures or management when dealing with pipelines as a transportation system in any industry. Through a quantitative approach, the associated disaster risk of inadequate corrosion control (cathodic protection) on pipelines in Port Harcourt, Nigeria, was investigated. One hundred (100) respondents (MNOCs staff) were involved, and a questionnaire was adopted for data collection. The finding revealed that pipeline leakages are attributed to cathodic rupture, corrosion, vandalization, rust, age,wear, and combined action of corrosion and vandalism. Among other risks, disaster risk associated with production and environmental impact was rated highly. As a preventive measure, the respondents indicated that Cathodic Protection System (CPS) prevents disasters associated with pipeline leakage due to the corrosion effect. Maintenance practices are carried out on the CPS annually. In conclusion, CPS endure risks are minimized and serve as a proven proactive measure to prevent pipeline corrosion.
    Keywords: corrosion, Cathodic system, Pipelines, Disaster Risk Management, oil, gas
  • Investigating the Effects of Government Oil Policies on the Iranian Economy
    Kim Lo Han, Pedram Shirzadi *, Peyman Vaziri, Andi Johnson
    With the knowledge of oil and its various applications in the social, industrial, and economic fields, the land of Iran found a special situation and experienced significant changes. Oil has been influential in how the people and the government communicate in Iran over the last hundred years. For a variety of reasons, mainly related to policy-making, Iran's economy produces small products in the industrial and agricultural sectors and exports them to the outside world, and relies heavily on crude oil exports to meet its import needs. More than 80% of the country's foreign exchange resources and more than 70% of the general budget resources are provided by the oil sector. Thus, oil as a supplier of material resources and political structures and stimulating socio-political incentives in creating socio-cultural changes and the composition of wealth and income, despite its ups and downs, has played an effective and key role, and without a doubt, oil in the future will be able to create structural changes in various economic, social and cultural dimensions in Iranian society.
    Keywords: Iran, Oil, Economy, cultural, social developments
  • Farideh Mohammadkhani Orouji *, Zahra Saeid
    Oil and natural gas are the most important sources of human energy supply. Crude oil provides 45% and natural gas 25% of the world's energy. Therefore, oil and gas are of strategic importance in the economic and political equations of the world and can play an important role in the process of international relations. Among the basic policies of consuming countries is the secure supply of energy and security of supply. Security of supply requires a stable and secure market that provides energy at a reasonable price to consumers. It is a decrease. The present article discusses the role of the oil and gas industry in international security from different angles.
    Keywords: Oil, Energy, Security, Iran, international relations
  • Hessam Nedaei, Seyed Gholamreza Jalali Naini*, Ahmad Makui

    Data envelopment analysis (DEA) measures the relative efficiency of decision-making units (DMU) with multiple inputs and multiple outputs. In the case of considering a working team as a DMU, it often comprises multiple positions with several employees. However, there is no method to measure the efficiency of employees individually taking account the effect of teammates. This paper presents a model to measure the efficiency of employees in a way that they are fairly evaluated regarding their teammates’ relative performances. Moreover, the learning expectations and the effect of learning lost due to operation breaks are incorporated into the DEA model. This model is thus able to rank the employees working in each position that can then be utilized within award systems. The capabilities of the proposed model are then explored by a case study of 20 wells with 160 distinct operations in the South Pars gas field, which is the first application of DEA in the oil and gas wells drilling performance analysis.

    Keywords: Data envelopment analysis, teammate efficiency, learning, Oil, gas, Drilling
  • طیبه پورمندبخشایش*، بهزاد سلمانی، محمد مهدی برقی اسکویی

    اقتصاد از چند بخش تشکیل شده است و عملکرد هر بخش نقش به خصوصی در پیشرفت اقتصاد دارد. بخش نفت و گاز اقتصاد بعنوان یکی از مهم ترین بخش های اقتصادی در ایران به علت منبع درآمد اصلی دولت نقش مهم و غیرقابل انکار در برنامه ریزی کشور دارد. بنابراین بررسی عملکرد این بخش می تواند برای رشد و پیشرت اقتصادی کشور مهم باشد. بررسی بهره وری کل عوامل یکی از راه های بررسی عملکرد بخش ها هست که نشان دهنده رشد بهینه اقتصاد آن بخش است. از این رو در این مقاله تاثیر عوامل مهم موثر بر رشد بهره وری کل عوامل بخش نفت و گاز شامل سرمایه گاری مستقیم خارجی، واردات کالاهای سرمایه ای و واسطه ای، انباشت تحقیق و توسعه و سرمایه انسانی مورد بررسی قرار گرفته است. دوره زمانی مورد بررسی تحقیق، 1379-1394 است. نتایج یافته ها این مطالعه حاکی از آن است که سرمایه گذاری مستقیم خارجی و واردات کالاهای سرمایه ای و واسطه ای به عنوان کانال های مهم سرریز فناوری بر رشد بهره وری کل عوامل بخش نفت و گاز تاثیر مثبت دارد. ولی انباشت تحقیق و توسعه بخش نفت و گاز نتوانسته تاثیر مثبت بر رشد بهره وری کل عوامل بخش نفت و گاز داشته باشد. سرمایه انسانی نیز به عنوان فعالیت ظرفیت ساز داخلی تاثیر مثبت بر رشد بهره وری کل عوامل بخش نفت و گاز دارد باتوجه به نتایج حاصله افزایش هزینه های اختصاصی به تحقیق و توسعه و ایجاد ارتباط تجاری و جذب سرمایه خارجی جهت سرمایه گذاری در این بخش و بهبود بهره وری عوامل تولید توصیه می شود.

    کلید واژگان: بخش نفت و گاز، رشد بهره وری کل عوامل، تحقیق و توسعه داخلی، سرمایه گذاری مستقیم خارجی
    tayyebeh pourmandbakhshayesh*, Behzad Salmani, mohammadmehdi bargioskooi

    The economy consists of several sections, and the performance of each sector plays a private part in the progress of the economy. The oil and gas sector, as one of the economic sectors in Iran, plays an important and undeniable role due to the main source of government revenue. Therefore, checking the performance of this sector can be important for the economic development of the country. The study of total factor productivity is one of the ways to examine the performance of sectors, which indicates the optimal growth of the economy of that sector. Therefore, this study investigates the effect of Technology Spillover and Research and Development (R&D) on growth of Total Factor Productivity (TFP) of the oil and gas sector in Iran for the period (1394-1394). Important factors of Technology Spillover include Foreign Direct Investment (FDI) and imports of capital goods and intermediates. Accumulation internal Research and Development (R&D) and human capital also are considered as internal impact factors. The results proved that foreign direct investment, and the imports of capital goods, and intermediates as important channels of technology spillover have a positive influence on growth of total factor productivity (TFP) of the oil and gas sector in Iran. The results also highlight a positive impact of human capital. By contrast, results of our estimation show a negative impact of R&D on growth of total factor productivity (TFP) of the oil and gas sector in Iran.

    Keywords: Oil, Gas Sector, The Growth of TFP, Spillover Technology, Internal R&D, Foreign Direct Investment
  • Mojtaba Salehi, Mohammad Mahdi Goorkani
    This research presents a model for optimal allocation of Iranian oil and gas resources in sanction condition based on stochastic linear multi-objective programming. The general policies of the resistive economy include expanding exports of gas, electricity, petrochemical and petroleum products, expanding the strategic oil and gas reserves, increasing added value through completing the petroleum value chain and decreasing crude oil and gas sale. The proposed mathematical model includes three objective functions: minimizing imports of petrochemical products and crude oil sale, maximizing economic benefits, and minimizing the environmental pollutions. The model includes constraints of gas, oil, and electricity flow balance and also supply and demand capacity constraints. A Pareto-archive-based particle swarm algorithm was used to solve the model. The results of proposed algorithm were compared with NSGA-IIresults. The comparison showed the proposed algorithm is more accurate in solving of the energy resource allocation model in 2016-2031 timespan. The results of this study can present helpful solutions to oil and gas resource allocation planning in Iran. The main contribution of this paper is proposing a new stochastic linear multi-objective programming with considering the general policies of resistive economy and solving the model with a new Pareto-archive-based particle swarm algorithm.
    Keywords: Oil, Gas Resource Allocation, Stochastic Linear Multi-Objective Programming, Economic Sanction, Resistive Economy, Particle swarm optimization
  • Md. Shazib Uddin, Mohammad Uzzal Hossain Joardder, Mohammad Nurul Islam
    This work investigated the production of bio oil from plum seed (Zyziphus jujuba) by fixed bed pyrolysis technology. A fixed bed pyrolysis system has been designed and fabricated for production of bio oil. The major components of the system are: fixed bed reactor, liquid condenser and liquid collector. Nitrogen gas was used to maintain the inert atmosphere in the reactor where the pyrolysis reaction takes place. The feedstock considered in this study is plum seed as it is available waste material in Bangladesh. The reactor is heated by means of a cylindrical biomass external heater. Rice husk was used as the energy source. The products are oil, char and gas. The parameters varied are reactor bed temperature, running time and feed particle size. The parameters are found to influence the product yields significantly. The maximum liquid yield of 39 wt% at 5200C for a feed particle size of 2.36-4.75 mm and a gas flow rate of 8 liter/min with a running time of 120 minute. The pyrolysis oil obtained at these optimum process conditions are analyzed for some of their properties as an alternative fuel. The density of the liquid was closer with diesel. The viscosity of the plum seed liquid was lower than that of the conventional fuels. The calorific value of the pyrolysis oil is one half of the diesel fuel.
    Keywords: Index Terms, Energy crisis, Renewable energy, Biomass resources, Pyrolysis technology, bio, oil
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