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gas-condensates
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Investigation on Aplicability of Decline Curve Analysis for Gas Condensate Reservoirs
, M.Sc. Thesis Sharif University of Technology ; Masihi, Mohsen (Supervisor) ; Gerami, Shahab (Supervisor)
Abstract
Part 1: Techniques of production data analysis for single-phase oil and gas reservoirs have advanced significantly over the past few years. These techniques range from traditional (Arps and Fetkovich) to modern (they account for the variation of operating conditions at the wellbore). Although the production data analysis methods are used generally for single phase reservoirs, the application of these techniques for analysis of production data of a gas condensate reservoir may not yield the reliable answer due to the fact that the flow of fluid in gas condensate reservoirs is not single-phase. This study presents the treatment of the modern methods of production data analysis (single phase...
Simultaneous Carbon Dioxide Storage and Enhanced Gas Recovery in Gas Condensate Reservoirs
, M.Sc. Thesis Sharif University of Technology ; Jamshidi, Saeid (Supervisor) ; Soltanieh, Mohammad (Supervisor)
Abstract
The consumption of fossil fuels (oil, gas and coal) increased the concentration of greenhouse gases in the atmosphere that cause increase of earth atmosphere temperature and lots of environmental problems. Using appropriate alternative energy sources is one way to control this emission, while considering energy infrastructures shows this is a far solution. An early way for decreasing the emission of greenhouse gases in the atmosphere is injection of CO2 in geological formations. Since approximately 50 years ago some researches in this area have been developing. The most important limit of these projects is its costs so it is wise to combine them with gas injection projects in gas and oil...
A novel method for prediction of parameters of naturally fractured condensate reservoirs using pressure response analysis
, Article Journal of Natural Gas Science and Engineering ; Vol. 19, issue , July , 2014 , p. 13-22 ; ISSN: 18755100 ; Jamshidi, S ; Masihi, M ; Sharif University of Technology
Abstract
Producing from gas condensate reservoirs under dew-point pressure and at constant temperature shows a complex behavior because of existing liquid condensate around the well. Zones with different mobilities generate three zones as a zone away from the well containing only gas, a zone having liquid around the well and finally a zone containing movable oil and gas. Existence of condensate around wellbore reduces gas relative permeability and as a result productivity index of the well will decrease. In fact, this condensate acts like an additional skin and investigating of this behavior can be difficult because of the complex fluid flow processes. Well test analysis in naturally fractured...
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) ; 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...
Modeling relative permeability of gas condensate reservoirs: Advanced computational frameworks
, Article Journal of Petroleum Science and Engineering ; Volume 189 , June , 2020 ; Menad, N. A ; Ghazanfari, M. H ; Hemmati Sarapardeh, A ; Sharif University of Technology
Elsevier B. V
2020
Abstract
In the last years, an appreciable effort has been directed toward developing empirical models to link the relative permeability of gas condensate reservoirs to the interfacial tension and velocity as well as saturation. However, these models suffer from non-universality and uncertainties in setting the tuning parameters. In order to alleviate the aforesaid infirmities in this study, comprehensive modeling was carried out by employing numerous smart computer-aided algorithms including Support Vector Regression (SVR), Least Square Support Vector Machine (LSSVM), Extreme Learning Machine (ELM), Multilayer Perceptron (MLP), Group Method of Data Handling (GMDH), and Gene Expression Programming...
Optimal distribution function determination for plus fraction splitting
, Article Canadian Journal of Chemical Engineering ; Volume 97, Issue 10 , 2019 , Pages 2752-2764 ; 00084034 (ISSN) ; Khoozan, D ; Jamshidi, S ; Sharif University of Technology
Wiley-Liss Inc
2019
Abstract
Reservoir fluid modelling is one of the most important steps in reservoir simulation and modelling of flow lines as well as surface facilities. One of the most uncertain parameters of the reservoir fluids is the plus fraction. An accurate and consistent splitting scheme can reduce this uncertainty and as a result, enhance the modelling of reservoir fluids. The existing schemes for splitting plus fractions are all based on assuming a specific mole fraction-molecular weight distribution with predefined constant values that may yield inaccurate and inconsistent results. In this study, an optimization-based algorithm was developed to determine the aforementioned controlling parameters of the...
Super gas wet and gas wet rock surface: state-of- the art evaluation through contact angle analysis
, Article Petroleum ; 2021 ; 24056561 (ISSN) ; Dehghan Monfared, A ; Shayegh, F ; Barzegar, F ; Ghazanfari, M. H ; Sharif University of Technology
KeAi Communications Co
2021
Abstract
Recently, super gas wet and gas wet surfaces have been extensively attended in petroleum industry, as supported by the increasing number of publications in the last decade related to wettability alteration in gas condensate reservoirs. In many cases, contact angle measurement has been employed to assess the wettability alteration. Even though contact angle measurement seems to be a straightforward approach, there exist many misuses of this technique and consequently misinterpretation of the corresponding results. In this regard, a critical inspection of the most recent updated concepts and the intervening parameters in the contact angle based wettability evaluation of liquid-solid-gas...
Production of silver nanoparticles by electromagnetic levitation gas condensation
, Article Chemical Engineering Journal ; Volume 168, Issue 1 , March , 2011 , Pages 441-445 ; 13858947 (ISSN) ; Halali, M ; Sharif University of Technology
2011
Abstract
Electromagnetic levitation gas condensation (ELGC) method was used to synthesize silver nanoparticles (NPs). Silver droplets were melted and levitated stably at about 1130°C with appropriate flat coils in a 10mm OD silica tube. High purity argon, nitrogen and helium were employed as carrier gases and cooling media. Morphology and particle size of the products were investigated by scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX) and dynamic light scattering (DLS). The DLS, SEM and TEM studies demonstrated narrow size distribution of spherical shape silver NPs with mean particle size of about 60, 50 and 30nm...