توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱NEW PREDICTION MODEL FOR NATURAL GAS VISCOSITY AT HIGH PRESSURES AND TEMPERATURES
نویسنده(ها): ، ،
اطلاعات انتشار: دوازدهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۱۲
Viscosities estimation of naturally occurring petroleum gases provides the information needed to accurately work out with petroleum engineering problems . Existing models for viscosity prediction are limited by data , especially at the extremely high pressures encountered in high temperature . This study shows that current methods which predict viscosities of natural gases by using the correlations are about 15% overestimated than the corresponding measuring at high pressures and temperatures , so need for accurate gas viscosity prediction will be arose . Also available commercial gas viscosity measuring devices do not give reliable and repeatable results . The National Institute of Science and Technology (NIST) is a useful source of properties of pure gases at high pressures and high temperatures ; these can be used in statistical analysis procedures to extend the current correlations . Experimental validation for naturally occurring petroleum mixtures is required too .<\div>

۲Immiscible Recycle Gas Injection Scenario: Simulating Optimum Conditions in One of the Iranian Oil Reservoirs
نویسنده(ها): ، ،
اطلاعات انتشار: دومین همایش مهندسی مخازن هیدروکربوری، علوم و صنایع مرتبط، سال
تعداد صفحات: ۱۱
Immiscible gas injection is one of the most common EOR methods used for various reservoir conditions. In this work, immiscible recycle gas injection, as an enhanced oil recovery scenario for improving recovery efficiency in one of the south–west Iranian oil reservoirs, is simulated by commercial simulator, Eclipse. The reservoir fluid is light oil with gravity of 43 oAPI. The oil bearing formations are carbonate and so dual porosity\dual permeability behavior was chosen for better representation of the fracture system. Different sensitivity analysis with respect to several parameters like number and location of injection\production wells, production\injection rate, completion interval and etc is performed. It has been observed that in sensitivity with number of wells, 1 injection\3 production wells was the most efficient case. Also well oil production rate of 200 SM3\Day and well bottom–hole pressure of 75 bar provided higher oil recovery. Completing injection wells in fracture and production wells in matrix has a better field oil efficiency in comparison to other cases. Finally we proposed optimum conditions for immiscible recycle gas injection in this reservoir which maximizes oil recovery efficiency.<\div>

۳Development of Hydrate Formation Phase Envelope: An Experimental Approach in One of the Iranian Gas Reservoirs
اطلاعات انتشار: Journal of Chemical and Petroleum Engineering، چهل و هفتم،شماره۲، ، سال
تعداد صفحات: ۱۳
Iran''s proved natural gas reserves are the world''s second largest reserves. Mainly, because of different climate changes and different reservoirs characterizations, studying the behavior of producing outcome fluids and their transportation, is of major interest. One of the main problems occur in the gas reservoirs is related to the hydrate formation while producing from a well, either in production strings or lines (before and after choke). Effective parameters which lead to hydrate formations are: high pressure in strings, low wellhead temperature together with water presence; and hence, the high possibility of having this phenomenon in the reservoirs is quite obvious for the gas wells. Hydrate formation in production lines and facilities will also lead to different impediments such as: complete or partial closure in production lines and heat exchangers, erosion of the equipment, pressure reduction, and etc. In this research, the conditions of hydrate formation, using the experimental data from one the Iranian sour gas field that is helpful to determine the safe\unsafe zones by P–T curves, are thoroughly investigated. In addition, the results will be compared to the other presented correlations available in the literature.

۴Experimental Observation and Mathematical Modeling of Immiscible Displacement in oil Wet Reservoirs
نویسنده(ها):
اطلاعات انتشار: Scientia Iranica، بيست و دوم،شماره۶، ۲۰۱۵، سال
تعداد صفحات: ۶
Here, a series of immiscible displacement processes have been performed on fractured porous medium developed on glass micro–models in order to investigate the role of fracture characteristics on oil displacement efficiency during immiscible displacement process. Oil recoveries were determined from image analysis of continuously recorded pictures during different flooding schemes. A clear bypassing of displacing fluid which results in premature breakthrough of injected fluid due to the fracture has been observed. Moreover, the results showed a decrease of oil recovery when fracture''s length increased. In contrast, an increase of fracture orientation from flow direction increased oil recovery. Results of this work may be useful for through understanding of immiscible displacement process as well optimal field development plans.
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