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    Experimental measurement and modeling of saturated reservoir oil viscosity

    , Article Korean Journal of Chemical Engineering ; Vol. 31, Issue. 7 , 2014 , pp. 1253-1264 ; ISSN: 02561115 Hemmati-Sarapardeh, A ; Majidi, S. M. J ; Mahmoudi, B ; Ramazani, S. A A ; Mohammadi, A. H ; Sharif University of Technology
    Abstract
    A novel mathematical-based approach is proposed to develop reliable models for prediction of saturated crude oil viscosity in a wide range of PVT properties. A new soft computing approach, namely least square support vector machine modeling optimized with coupled simulated annealing optimization technique, is proposed. Six models have been developed to predict saturated oil viscosity, which are designed in such a way that could predict saturated oil viscosity with every available PVT parameter. The constructed models are evaluated by carrying out extensive experimental saturated crude oil viscosity data from Iranian oil reservoirs, which were measured using a "Rolling Ball viscometer." To... 

    An economic analysis of Iranian petroleum contract

    , Article Petroleum Science ; Volume 17, Issue 5 , 2020 , Pages 1451-1461 Farimani, F. M ; Mu, X ; Sahebhonar, H ; Taherifard, A ; Sharif University of Technology
    China University of Petroleum Beijing  2020
    Abstract
    Following three generations of buyback contracts, the new model of Iranian petroleum contracts (IPC) was introduced by the Iranian cabinet to incentivize investments in the country. This paper analyzes the fiscal terms of the contract with technical information from one of the candidate fields for licensing. The financial simulation shows that, in general, the IPC resembles more a service contract than a production sharing contract as the contractor’s take is relatively low—below 5% across different scenarios of crude oil price. Second, the IPC is progressive in that as the overall profitability of the project improves the government takes an increasing share of the economic rent. The... 

    Application of temperature transient analysis in well test interpretation for gas wells

    , Article Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2007 "Resources, Professionalism, Technology: Time to Deliver"30 October 2007 through 1 November 2007Code 73703 ; Volume 2 , 2007 , Pages 643 - 655 ; 9781604238594 (ISBN) Bahrami, H ; Siavoshi, J ; Sharif University of Technology
    Abstract
    During transient tests, both pressure and temperature are changed depending on downhole flow rate. In gas producing wells, Joule-Thomson cooling and frictional heating effects are the main dynamic factors causing flowing bottomhole temperature to differ from the static formation temperature at that depth. When a gas well is shut in, JT cooling effect is vanished and this causes a sharp increase in sandface temperature. As effect of wellbore storage ends, wellbore temperature gradually cools down due to heat conduction with near wellbore region. This paper demonstrates a new technique for using temperature transient data in gas wells in order to determine end of wellbore storage. Also, effect... 

    A Review on chemical sand production control techniques in oil reservoirs

    , Article Energy and Fuels ; 2022 ; 08870624 (ISSN) Saghandali, F ; Baghban Salehi, M ; Hosseinzadehsemnani, R ; Moghanloo, R. G ; Taghikhani, V ; Sharif University of Technology
    American Chemical Society  2022
    Abstract
    This review aims to bring together the studies on petroleum reservoirs' sand production control in a comprehensive guide for the researcher to compare various methods for the chemical consolidation of sand. Sand production can be considered one of the major challenges in the petroleum production industry, causing severe operational issues. This study introduces various methods to control and prevent sand production in petroleum wells and evaluates their advantages and performance in tabular form. The use of chemical procedures is considered to be more efficient in counteracting the production and migration of sand. Various chemicals and polymers have been proposed for this purpose. These... 

    Distribution and mobility of petroleum hydrocarbons in soil: Case study of the south pars gas complex, Southern Iran

    , Article Iranian Journal of Science and Technology - Transactions of Civil Engineering ; Volume 36, Issue C2 , 2012 , Pages 265-275 ; 22286160 (ISSN) Akbari, A ; Ardestani, M ; Shayegan, J ; Sharif University of Technology
    2012
    Abstract
    This article discusses the distribution of total petroleum hydrocarbons (TPH) contamination in soil within areas of the South Pars Gas Complex (S.P.G.C.), located on the northern shore of the Persian Gulf. To assess the potential risk to groundwater, in situ contaminant mobility was also examined in vertical soil profiles. Sampling was conducted in two rounds, and TPH was determined in accordance with standard methods of TPH analysis. The maximum detected concentration was 10268±785 mg/kg in the area of the waste disposal site. Significant heterogeneity in natural attenuation of different hydrocarbon compounds during transport in the soil was observed. Although the groundwater samples did... 

    An improved component retrieval method for cubic equations of state with non-zero binary interaction coefficients for natural oil and gas

    , Article Journal of Petroleum Exploration and Production Technology ; Volume 6, Issue 2 , 2016 , Pages 243-251 ; 21900558 (ISSN) Assareh, M ; Ghotbi, C ; Bashiri, G ; Roayaie, E ; Sharif University of Technology
    Springer Verlag 
    Abstract
    Volumetric and equilibrium calculations for the natural gas and oil defined by a large number of components are not feasible in applications like compositional reservoir simulation. Therefore, the fluid mixture is grouped to reduce computational load and to make faster calculations. However, for several reasons, it is required to have the detailed fluid composition rather than the lumped one. In this work, an improved delumping method is presented to retrieve the phase composition of the detailed mixture based on the grouped mixture thermodynamic calculations. The method is based on previously proposed delumping techniques for non-cubic equation of state (Assareh et al. in Fluid Phase... 

    Biological treatment of petroleum contaminated soils by soil slurry-sequencing batch reactors (SS-SBRs)

    , Article 4th International Conference on Waste Management and the Environment, Waste Management 2008, Granada, 2 June 2008 through 4 June 2008 ; Volume 109 , 2008 , Pages 751-758 ; 17433541 (ISSN); 9781845641139 (ISBN) Torabifar, B ; Torabian, A ; Azimi, A. A ; Vossoughi, M ; Sharif University of Technology
    WITPress  2008
    Abstract
    The soil slurry-sequencing bath reactor (SS-SBR) was studied to treat poorly graded sand with clay (SP-SC) contaminated by aged petroleum hydrocarbons and polycyclic aromatic hydrocarbons (PAHs) with concentrations of 23000 mg/kg and 750 mg/kg respectively. An 8 L bioreactor was operated with a 10% solid concentration (0.1 kg dry soil/L slurry). The fill period was relatively instantaneous, and the draw period lasted approximately 1 minute so the react period comprised essentially the entire cycle time. In the draw period a fraction of slurry (10%) was removed from the SS-SBR weekly and it was replaced with untreated slurry. This volumetric replacement strategy provided 70 days hydraulic... 

    Liquid petroleum gas flame in a double-swirl gas turbine model combustor lean blow-out, pollutant, preheating

    , Article Thermal Science ; Volume 25, Issue 1 , 2021 , Pages 377-393 ; 03549836 (ISSN) Mardani, A ; Rastaaghi, H. R ; Ghomshi, A. F ; Sharif University of Technology
    Serbian Society of Heat Transfer Engineers  2021
    Abstract
    In this paper, lean blow-out limits in a double swirl GT model combustor were investigated experimentally for liquid petroleum gas fuel. The lean blow-out curve was extracted for different combustor configurations. While burner could operate reasonably under ultra-lean conditions, two different sets of operating conditions, one with a low flow rate and another one with high flow rate, are identified and studied in terms of lean blow-out and pollutant. Results showed that while the flame structure was similar in both cases, the chamber responses to geometrical changes and also preheating are minimal at the low flow rate. That means confinement and injector type have desirable effects on... 

    Biological upgrading of heavy oil cuts using native microbial consortia as an environmental-friendly technology in petroleum refineries

    , Article Advances in Environmental Technology ; Volume 8, Issue 3 , 2022 , Pages 215-228 ; 24766674 (ISSN) Ghavipanjeh, F ; Ziaei Rad, Z ; Shayegan, J ; Pazouki, M ; Hossinia, A ; Sharif University of Technology
    Iranian Research Organization for Science and Technology  2022
    Abstract
    Refineries are amongst the most energy-intensive and polluting industries in the world. Biotechnology may serve as an alternative low-cost and environmental-friendly tool to the current costly, toxic and hazardous refining processes. In this study, the compositional redistribution of a heavy hydrocarbon cut is investigated under biological conversion using native microbial consortia. The native consortia were obtained by batch enrichment method applied on oil-polluted soil samples from oil refineries of Iran. The bioconversion experiments were conducted with 20% and 40% (v/v) of the heavy cut as the sole carbon source and 10% (v/v) of the consortia broth in 250 ml flasks containing a mineral... 

    Investigating the mechanism of water inflow in gas wells in fractured gas reservoirs and designing a controlling method

    , Article SPE Production and Operations Symposium, Proceedings ; Vol. 1, issue , May , 2012 , p. 323-340 ; ISBN: 9781613992012 Jafari, I ; Jamshidi, S ; Masihi, M ; Sharif University of Technology
    Abstract
    The coning phenomenon usually occurs in water and gas cap drive reservoirs. Water coning in Iranian hydrocarbon reservoirs is one of the most important problems that affects the cumulative production, operation costs and causes environmental problems. Before producing from a reservoir, its fluids are in equilibrium and their contact surfaces remain unchanged, but after starting production from the reservoir, when the viscous force overcome gravitational force in vertical direction, contact surfaces will displace and coning will occur. So, the production rates will be controlled in a range that prevents entering water and gas to the production well. For this reason, investigation and modeling... 

    Investigating the mechanism of water inflow in gas wells in fractured gas reservoirs and designing a controlling method

    , Article SPE Production and Operations Symposium, Proceedings ; Volume 1 , 2012 , Pages 323-340 ; 9781622761272 (ISBN) Jafari, I ; Jamshidi, S ; Masihi, M ; Sharif University of Technology
    SPE  2012
    Abstract
    The coning phenomenon usually occurs in water and gas cap drive reservoirs. Water coning in Iranian hydrocarbon reservoirs is one of the most important problems that affects the cumulative production, operation costs and causes environmental problems. Before producing from a reservoir, its fluids are in equilibrium and their contact surfaces remain unchanged, but after starting production from the reservoir, when the viscous force overcome gravitational force in vertical direction, contact surfaces will displace and coning will occur. So, the production rates will be controlled in a range that prevents entering water and gas to the production well. For this reason, investigation and modeling... 

    Heavy oil thermal conversion and refinement to the green petroleum: A petrochemical refinement plant using the sustainable formic acid for the process

    , Article Biointerface Research in Applied Chemistry ; Volume 10, Issue 5 , 2020 , Pages 6088-6100 Norouzi, N ; Talebi, S ; Fabi, M ; Khajehpour, H ; Sharif University of Technology
    AMG Transcend Association  2020
    Abstract
    In this study, heat oil conversion experiments using steam and formic acid as a hydrogen carrier be carried out in a batch reactor at T = 380 degrees of Celsius and P = 165 bar. Material balance and product distribution were calculated after the process. Properties of crude oil before and after thermal conversion, including viscosity, API gravity, SARA measurement, and elemental analysis, were analyzed. It has been presented that the use of formic acid as a hydrogen carrier solvent reduces the formation of coke and gaseous products and enhances the performance of liquid products. Also, the viscosity of the refined oil decreased by 23.2% due to the addition of formic acid compared to the... 

    Application of temperature transient analysis for welltest interpretation and well productivity evaluation

    , Article Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition, Jakarta, Indonesia,October 30–November 1, 2007 ; 2007 ; 9781613990407 (ISBN) Bahrami, N ; Siavoshi, J ; Sharif University of Technology
    2007
    Abstract
    During transient tests, both pressure and temperature are changed depending on downhole flow rate. In gas producing wells, Joule-Thomson cooling and frictional heating effects are the main dynamic factors causing flowing bottomhole temperature to differ from the static formation temperature at that depth. When a gas well is shut in, JT cooling effect is vanished and this causes a sharp increase in sandface temperature. As effect of wellbore storage ends, wellbore temperature gradually cools down due to heat conduction with near wellbore region. This paper demonstrates a new technique for using temperature transient data in gas wells in order to determine end of wellbore storage. Also, effect... 

    Comparing different scenarios for thermal enhanced oil recovery in fractured reservoirs using hybrid solar-gas steam generators, a simulation study

    , Article Society of Petroleum Engineers - SPE Europec Featured at 78th EAGE Conference and Exhibition, 30 May 2016 through 2 June 2016 ; 2016 ; 9781613994573 (ISBN) Mirzaie Yegane, M ; Bashtani, F ; Tahmasebi, A ; Ayatollahi, S ; Al Wahaibi, Y. M ; Sharif University of Technology
    Society of Petroleum Engineers  2016
    Abstract
    The application of the renewable energy sources, especially solar energy, for thermal enhanced oil recovery methods as an economical and environmental valuable technique has received many attractions recently. Concentrated Solar Power systems are capable of producing substantial quantities of steam by means of focused sunlight as the heat source for steam generation. This paper aims to investigate viability of using this innovative technology in fractured reservoirs to generate steam instead of using conventional steam generators. A synthetic fractured reservoir with properties similar to those of giant carbonate oil reserves in the Middle East was designed by using commercial thermal... 

    PC-SAFT modeling of petroleum reservoir fluid phase behavior using new correlations for petroleum cuts and plus fractions

    , Article Fluid Phase Equilibria ; Volume 408 , 2016 , Pages 273-283 ; 03783812 (ISSN) Assareh, M ; Ghotbi, C ; Tavakkoli, M ; Bashiri, G ; Sharif University of Technology
    Elsevier 
    Abstract
    Parameters of the PC-SAFT Equation of State (EoS) for pure components are generally determined by matching the saturation pressure and liquid density experimental data. These experimental data are unavailable for petroleum cuts and plus fractions of the petroleum reservoir fluids. In this work, new correlations as functions of specific gravity and molecular weight were developed to estimate the PC-SAFT parameters of petroleum cuts with unknown composition. It was shown that the proposed correlations accurately estimate the PC-SAFT parameters of the pure components published in the literature. Then, the obtained correlations were used and the PVT experimental data for various real reservoir... 

    Estimation of the Effective Permeability of Heterogeneous Porous Media by Using Percolation Concepts

    , Article Transport in Porous Media ; Volume 114, Issue 1 , 2016 , Pages 169-199 ; 01693913 (ISSN) Masihi, M ; Gago, P. A ; King, P. R ; Sharif University of Technology
    Springer Netherlands  2016
    Abstract
    In this paper we present new methods to estimate the effective permeability (keff) of heterogeneous porous media with a wide distribution of permeabilities and various underlying structures, using percolation concepts. We first set a threshold permeability (kth) on the permeability density function and use standard algorithms from percolation theory to check whether the high permeable grid blocks (i.e., those with permeability higher than kth) with occupied fraction of “p” first forms a cluster connecting two opposite sides of the system in the direction of the flow (high permeability flow pathway). Then we estimate the effective permeability of the heterogeneous porous media in different... 

    Technology planning system for the Iranian petroleum industry: lessons learned from sanctions

    , Article Technological Forecasting and Social Change ; Volume 122 , 2017 , Pages 170-178 ; 00401625 (ISSN) Hoshdar, F ; Ghazinoory, S ; Arasti, M ; Fassihi, S. F ; Sharif University of Technology
    Abstract
    Iran's petroleum industry is facing challenges including maturity of hydrocarbon fields, growing population of the nation that demands additional revenues from petroleum exports, and international economic sanctions that have limited access to technology sources. Restrictions from international technology providers have led managers of the industry enterprises to try to develop their needed technologies inside the country. The Ministry of Petroleum has supervised this and as a result, a technology planning systems has been developed and implemented since 2009. In this paper, an overview of the Iranian petroleum industry is provided from a technology planning perspective. The focus has been... 

    The semi-analytical modeling and simulation of the VAPEX process of ""Kuh-e-Mond"" heavy oil reservoir

    , Article Petroleum Science and Technology ; Vol. 29, issue. 5 , Oct , 2009 , p. 535-548 ; ISSN: 10916466 Rasti, F ; Masihi, M ; Kharrat, R ; Sharif University of Technology
    Abstract
    The vapor extraction process (or VAPEX) uses vaporized solvents injected into a horizontal well to form a vapor chamber within the reservoir. Vapor dissolves in the oil and enhances the oil production by decreasing the oil viscosity in heavy oil reservoirs. To evaluate the process we conduct a simulation study on an Iranian heavy oil reservoir called Kuh-e-Mond. In addition, a semi-analytical investigation of the VAPEX process has been performed. The idea is to perform VAPEX simulation for a laboratory model and find a methodology to compare the results of the simulator with the semi-analytical Butler's model. In particular, a semi-analytical dimensionless correlation for production rate... 

    The semi-analytical modeling and simulation of the VAPEX process of "Kuh-e-Mond" heavy oil reservoir

    , Article Petroleum Science and Technology ; Volume 29, Issue 5 , 2011 , Pages 535-548 ; 10916466 (ISSN) Rasti, F ; Masihi, M ; Kharrat, R ; Sharif University of Technology
    Abstract
    The vapor extraction process (or VAPEX) uses vaporized solvents injected into a horizontal well to form a vapor chamber within the reservoir. Vapor dissolves in the oil and enhances the oil production by decreasing the oil viscosity in heavy oil reservoirs. To evaluate the process we conduct a simulation study on an Iranian heavy oil reservoir called Kuh-e-Mond. In addition, a semi-analytical investigation of the VAPEX process has been performed. The idea is to perform VAPEX simulation for a laboratory model and find a methodology to compare the results of the simulator with the semi-analytical Butler's model. In particular, a semi-analytical dimensionless correlation for production rate... 

    Investigating the effect of several auxiliary carbon sources in treatment of petroleum deposits by the bacterial strain BBRC9012

    , Article CHISA 2006 - 17th International Congress of Chemical and Process Engineering, Prague, 27 August 2006 through 31 August 2006 ; 2006 ; 8086059456 (ISBN); 9788086059457 (ISBN) Baghban, E ; Roostaazad, R ; Yaghmaei, S ; Sharif University of Technology
    2006
    Abstract
    Effect of several auxiliary carbon sources such as crude oil, different precultures, and quality of adding crude oil in treatment of petroleum wax deposits by an isolated bacterial strain, BBRC9012, was investigated. First and second experiments which compered effect of molasses, glucose and crude oil, indicated that glucose and molasses causes more microbial growth, biosurfactant production and bioemolsification than crude oil. Both optometry and Surface tension measurements showed that using molasses-BHB preculture for wax treatment is not suitable and when crude oil is used as auxiliary carbon source a one day lag phase is unavoidable. It was also shown that when crude oil is added to...