Methane Conversion to Higher and Valuable Hydrocarbons by Non-thermal Plasma

, M.Sc. Thesis Sharif University of Technology Habibpour, Mahdi (Author) ; Saddighi Bonabi, Rasoul (Supervisor)

Abstract

Methane conversion into higher hydrocarbons has been investigated by non-thermal plasma. The most important advantages of utilizing this type of plasma are atmospheric pressure and ambient temperature of the operating system. Without any catalysts and with pure methane used as the feed gas, a stable 20 kilohertz spark discharge leads to an acetylene selectivity of 90.4 % with 54.5 % of methane conversion at a methane fow rate of 33 ml/min and a specific input energy of 54 kJ/L. Other components such as hydrogen, ethylene and ethane are also formed in the process as by-products. These remarkable results expose superiority of spark plasma in comparison with other types of non-thermal...

Feasibility of using laser bit beside of common bits to drilling slim holes

, Article Society of Petroleum Engineers - International Petroleum Technology Conference 2013, IPTC 2013: Challenging Technology and Economic Limits to Meet the Global Energy Demand ; Volume 1 , 2013 , Pages 422-433 ; 9781627481762 (ISBN) Bazargan, M ; Jalalyfar, H ; Koohian, A ; Habibpour, M ; Sharif University of Technology

2013

Abstract

The capability level of rotary as well as first generation drilling operation could not be matched for deeply drilling programs. To reach that deep, the increasing in drill string length could also cause an additional constraint on hydraulic performance. The operation of slim hole drilling has significant potential to reduce well costs. This cost might be savings are especially important with increased demand for reduced capital finance under current economic conditions in the Iranian oil and gas industry. This savings achievement could be caused by use of smaller drilling rigs, work over rigs, reduced casing size, reducing requirement for drilling consumables and other costs associated with...

An optimization methodology for cancer growth control base on breeder genetic algorithm-finite volume coupling

, Article Proceedings of the ASME Summer Bioengineering Conference 2009, SBC2009, 17 June 2009 through 21 June 2009, Lake Tahoe, CA ; Issue PART A , 2009 , Pages 567-568 ; 9780791848913 (ISBN) Taheri, A ; Mohammadi Amin, M ; Habibpour Ledari, A ; Sharif University of Technology

2009

Cyclic Behavior of Interior Reinforced Concrete Beam-column Connection with Self-consolidating

, Ph.D. Dissertation Sharif University of Technology Salehi Mobin, Jalal (Author) ; Kazemi, Mohammad Taghi (Supervisor)

Abstract

A significant amount of research in self-consolidating concrete technology is being placed in evaluating the suitability of the material for use in structural applications. However, research is needed to confirm the ability of self-consolidating concrete structural elements to adequately resist vertical and lateral loads. In a reinforced concrete building subjected to earthquake type loading, the beam to column connections constitute one of the critical regions and they must be designed and detailed to dissipate large amounts of energy without a significant loss of stiffness or strength. In the experimental part of this study, four full size interior beam-column subassemblages with 3.0 m...

Experimental Investigation of Asphaltene Precipitation and Deposition in Enhanced Oil Recovery by Low Salinity Waterflooding

, M.Sc. Thesis Sharif University of Technology Hosseini, Ali (Author) ; Ayatollahi, Shahabadin (Supervisor) ; Fatemi, Mobin (Supervisor)

Abstract

Asphaltenes are a polydisperse mixture of the heaviest and most polarizable fractions of the crude oil. They are defined according to their solubility properties as being soluble in aromatic solvents but insoluble in light paraffin solvents. Asphaltenes are usually responsible for many problems like wettability changes of the reservoir rock, pore clogging in the reservoir porous matrix and fouling in wellbore tubing and production surface facilities. Most of the studies in the literature, addressing the asphaltene precipitation and deposition (APD), are investigating natural depletion or gas injection process such as CO2 flooding. These studies show that asphaltene deposition and...

Political Conflicts, Uncertainty and Investment in Iran

, M.Sc. Thesis Sharif University of Technology Habibpour Moghaddam, Ehsan (Author) ; Barakchian, Mahdi (Supervisor) ; Nili, Masoud (Co-Supervisor)

Abstract

Investment is a variable that would determine the future status of the economy. Given the fact that the investment behavior consequences in the economy would appear in the long-term horizons, unlike most other state variables, such as inflation and exchange rates, it may not be a tangible variable. As a result, there may be fewer sensitivities toward it. However, looking at the evidence, it is observable that the level of investment in Iran has experienced a severe reduction since the early 2010s, and this decline in investment has remained stable in its trend. The real aggregate investment level in Iran at the end of the year 2018 was approximately equal to its level in the year 2002. There...

Cyclic behaviour of interior reinforced concrete beam-column connection with self-consolidating concrete

, Article Structural Concrete ; Volume 17, Issue 4 , 2016 , Pages 618-629 ; 14644177 (ISSN) Salehi Mobin, J ; Kazemi, M. T ; Attari, N. K. A ; Sharif University of Technology

Wiley-Blackwell 2016

Abstract

A significant amount of research on self-consolidating concrete (SCC) technology has been devoted to evaluating the suitability of the material for its use in structural applications. However, more research is required to confirm the adequacy of SCC structural members for resisting gravity and seismic loads. This study focuses on the experimental investigation of the seismic performance of interior reinforced concrete beam-column connections with SCC. Four beam-column connection specimens, three with SCC and one with normally vibrated concrete (NC), were designed for this experimental study. Factors such as concrete type (SCC or NC) and axial load ratio (0, 7.5 and 15 % of column section...

2D Compositional Simulation of Reservoirs using Finite Volume Method

, M.Sc. Thesis Sharif University of Technology Abdollahzadeh, Soleiman (Author) ; Pishvaie, Mahmoud Reza (Supervisor) ; Fatemi, Mobin (Supervisor)

Abstract

One of the main purposes of this project is to propose an efficient and stable algorithm of a semi-discretized formulation for compositional simulation of oil reservoirs. In this algorithm, all the equations including both mass balances and equilibrium equations are solved simultaneously. The gradient terms are discretized by the Finite Volume Method (FVM). The resulting Differential Algebraic Equation, the so-called DAE, are solved by MATLAB functions. Another novel technique developed, handles each block equations set, separately. In this block-by-block scheme, there are two set of equations; the primary (mass balance) and secondary (equilibrium) equations. In the primary ones, the...

Experimental Investigation of Fractures’ Water Shut-off in Low Salinity Water Injection Using Preformed Particle Gels

, M.Sc. Thesis Sharif University of Technology Sanandaji, Farshid (Author) ; Fatemi, Mobin (Supervisor) ; Ghazanfari, Mohammad Hossein (Supervisor)

Abstract

As the reservoir matures, especially in fractured reservoirs, oil production is usually accompanied by the production of some unwanted water. Water production causes environmental problems and imposes high costs on the production system, including the cost of separating water and oil, corrosion of facility, and sometimes, leading to abandoning well. One way to solve this problem is to use gels as a blocking agent. Today, preformed particle gels are used as an alternative to in situ gels, which can solve some issues of in-situ gels, such as uncertainty in gelling time and penetration depth.This research comprises three main parts. In the first part, four samples of preformed particle gels...

Experimental Investigation and Modeling of Flow ّunction Variation in Enhanced oil Recovery Using Low Salinity/Smart Water Injection in a Carbonate Reservoir

, Ph.D. Dissertation Sharif University of Technology Farhadi, Hamed (Author) ; Ayatollahi, Shahaboddin (Supervisor) ; Fatemi, Mobin (Supervisor)

Abstract

Low salinity water flooding (LSWF) as an efficient enhanced oil recovery (EOR) technique is proved to affect both, fluid-fluid and rock-fluid interactions to potentially release the trapped oil from the porous rock. Despite more than one decade of extensive research works on the low salinity water effect (LSWE), there are still many parameters to be studied for very complex cases. Therefore, in the first part of the experimental study of the dissertation, a systematic investigation on the effect of the initial wetting state (water-wet or oil-wet) of pure calcite is conducted to study the importance of fluid/fluid and fluid/rock interactions for LSWE investigation. In the case of initially...

Compositional Simulation of Reservoirs Using Finite Element Method

, M.Sc. Thesis Sharif University of Technology Mehrnia, Mohammad (Author) ; Pishvaie, Mahmoud Reza (Supervisor) ; Mobin, Fatemi (Supervisor)

Abstract

One of the main purposes of this study is to present a robust and yet efficient semi-discretized algorithm for compositional simulation. All the equations including both the mass balance and the phase equilibrium equations are solved simultaneously which forms a Differential-Algebraic set of Equations and is solved by utilizing an efficient MATLAB solver. Furthermore, another formulation and algorithm is proposed which is consisted of two sets of equations, the primary equations (differential mass balance equations) and the secondary equations (the algebraic phase equilibrium equations). The gradient terms in the primary equations are discretized by using finite element method (Galerkin...

Investigating the Role of Molecular Diffusion on the Performance of Non-Equilibrium Gas Injection in One of the Fractured Reservoirs in Iran

, M.Sc. Thesis Sharif University of Technology Rigi, Ahmad (Author) ; Ghazanfari, Mohammad Hossein (Supervisor) ; Fatemi, Mobin (Supervisor)

Abstract

Major parts of Iran's oil reservoirs are fractured carbonates, which need time to produce oil due to their much lower permeability than sandstone reservoirs. Molecular diffusion mechanism is an efficient mechanism in oil recovery from fractured reservoirs under gas injection conditions. The main subject of this work is to investigate the role of molecular diffusion mechanism in the non-equilibrium gas injection project and its role in increasing the oil recovery rate in two southern fractured reservoirs located in the west of Iran, taking into account the capillary pressure, as well as the change of interfacial tension closely miscible conditions is also investigated through simulation. The...

Comparison of wellbore stability of UBD in the case of laser drilling and conventional operation

, Article 76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014 ; 2014 , Pages 1736-1740 ; ISBN: 9781632666949 Bazargan, M ; Nakhaee, A ; Koohian, A ; Irawan, S ; Habibpour, M ; Shahvar, M ; Sharif University of Technology

2014

Abstract

In recent years, growing interest in underbalanced drilling has resulted in the rapid development of its associated equipment technology, practices, and procedures. Underbalanced drilling is used to avoid lost circulation, formation damage, and decreasing weight on bit. However, the risk of wellbore collapse due to lake of hydrostatic mud pressure is high; therefore, using good geo-mechanical model may avoid wellbore instability problems. In order to evaluate the potential for wellbore instability, it is necessary to use an elastoplastic model to compute the stresses and strains around the bore hole. Furthermore, it should be mentioned that the laser drilling process depends extremely on the...

Interactions between high power fiber laser and rock in shaley formation during drilling and production operation

, Article 6th EAGE Saint Petersburg International Conference and Exhibition ; 7-10 April , 2014 , Pages 594-598 ; ISBN: 9781632665393 Bazargan, M ; Koohian, A ; Jalalyfar, H ; Habibpour, M ; Shahvar, M. P ; Madani, A ; Sharif University of Technology

2014

Abstract

This paper is presenting the data on interactions between Fiber laser and shale. With this obvious goal that is dependent on improving the efficiency of laser power. The idea of selecting shale sample was because of variety of this rock type in Iranian oil and gas formations. In the experiment, a long pulsed laser beam was arranged to drill and propagate surfaces, in the opposite direction to the earth gravity, and it was used to drill hole from the top to the bottom of cylindrical Shale rock. The heat that been induced from the Fiber laser is absorbed in the direct surfaces in front and cause heat flux generation inside of rock texture. The specific heat transfer inside of shale sample can...

Experimental Investigation on the Performance of Preformed Particle Gel (PPG) in the Combined Injection of Low-Salinity Water and CO2: Conformance Control and for in the Naturally Fractured Systems

, M.Sc. Thesis Sharif University of Technology Abbasi Khoshkar, Peyman (Author) ; Fatemi, Mobin (Supervisor) ; Ghazanfari, Mohammad Hossein (Co-Supervisor)

Abstract

Excessive water production in highly heterogeneous mature reservoirs (water flooded or affected by water zones) leads to increased production costs. Water production causes sediment formation, creation of corrosion, water treatment and disposal, and finally due to the inefficiency of production, it leads to closure of the well.Among the methods introduced to reduce water production, the use of polymers and gels as an affordable and effective method has been widely used in enhanced oil recovery processes. The main mechanism in this method is blocking or limiting the major paths of water flow (fractures or high permeability zones) and thereby increasing sweep efficiency in water injection....

Pore Scale Simulation of the Fluid/Fluid and Fluid/Rock Interactions on the Performance of Water Injection

, M.Sc. Thesis Sharif University of Technology Mousavi, Mohammad Javad (Author) ; Fatemi, Mobin (Supervisor) ; Pishvaie, Mahmood Reza (Co-Supervisor)

Abstract

Two-phase fluid flow physics in porous media is applied in various fields. Studies have shown that wettability and surface tension, which represent fluid-rock and fluid-fluid interactions, have a significant effect on the dynamics of the immiscible displacement. Although the effects of wettability and surface tension on the macroscopic behavior of fluid flow are known, there is less understanding of it at the micro scale. Considering the essential role of wettability and surface tension in various fields, this project seeks to investigate the effects of wettability and surface tension on the movement and distribution of fluids and the dominant displacement mechanisms within the porous media...

Semantic Visual SLAM in Dynamic Environments

, M.Sc. Thesis Sharif University of Technology Habibpour, Mobin (Author) ; Meghdari, Ali (Supervisor) ; Nemati Estahbanati, Alireza (Supervisor) ; Taheri, Alireza (Co-Supervisor)

Abstract

Most of the existing visual SLAM methods heavily rely on a static world assumption and easily fail in dynamic environments. One solution is to eliminate the influence of dynamic objects by introducing deep learning-based semantic information to SLAM systems. In this project, we propose a real-time semantic RGB-D SLAM (built upon RTAB-Map) system for dynamic environments that is capable of detecting moving objects and maintaining a static map for robust camera tracking. Furthermore, we augment the semantic segmentation process using an Extended Kalman filter module to detect temporarily static moving objects by adding centroids to each found dynamic object and calculating their velocity. We...

Experimental Investigation on the Performance of Preformed Particle Gel in Improving Oil Recovery by Low Salinity Water Injection in Heterogeneous Porous Media

, M.Sc. Thesis Sharif University of Technology Moshirpanahi Aliabad, Mohammad (Author) ; Ghazanfare, Mohammad Hossein (Supervisor) ; Fatemi, Mobin (Supervisor)

Abstract

Water production from high permeability regions such as fractures and channels in the reservoir can be considered as one of the problematic issues in oil production. In order to control water production, chemical methods such as polymer injection, surfactant injection, and foam injection are widely used, among all of them, Preformed Particle Gel (PPG) is the most efficient method.By injecting the preformed particle gel into the reservoir and blockage of fractures and high permeable regions, Injected water bypasses to the target zone. In this study, preformed gel with a unique formulation was synthesized by free radical polymerization method in the laboratory.Nano-Clay and Nano-Silica were...