Search for: drilling-fluid
0.009 seconds

    Simulation of Non-newtonian Flow of Drilling Fluid Around the Drill String with the Olga Software

    , M.Sc. Thesis Sharif University of Technology Sadri, Avazdordi (Author) ; Jamshidi, Saeed (Supervisor)
    Because of the importance of simulations in the oil industry, there are different software applications designed for this purpose. The purpose of the simulation in the oil industry is to reduce operational errors during the operation and to achieve the most ideal mode of operation. However, in the simulation of multiphase fluid flow because of the special circumstance, simulation plays an important role in the oil industry. OLGA multiphase flow simulation software is a strong simulation software for water, oil, Gas wells, wellhead facilities, refineries and pipelines and it is capable of simulating pipelines under various dynamic conditions. Simulation of drilling hydraulic parameters is... 

    Laboratory-Scale Design and Evaluation of Polymer-Fiber Composite in Order to Control Lost Circulation In Drilling Fluid

    , M.Sc. Thesis Sharif University of Technology Abdollahi, Maryam (Author) ; Ghotbi, Cyrus (Supervisor) ; Jafari, Taraneh (Supervisor) ; Nasiri, Alireza ($item.subfieldsMap.e)
    During the over balanced drilling operation in high permeability or fractured formations, drilling fluid loss and in more severe occasions fluid lost occurs which causes many problems and dangers and delayed the drilling operation until it was repaired. On the one hand, because of the high value of this material, and on the other hand, due to the increase in rig/day costs resulting from lost circulation control, leads to a significant increase in drilling costs. In this research, polymer-fiber composites have been designed and manufactured using extrusion method and have been investigated as fluid lost control agent in the laboratory scale for the first time in Iran. The effective parameters... 

    Water-Based Drilling Fluid Design Considering Thermal Stability by Nano Material and Evaluation Filtration Loss, and Shale Swelling Criteria for Usage in very Deep Drilling

    , M.Sc. Thesis Sharif University of Technology Parhizgar, Mahmood (Author) ; Goodarznia, Iraj (Supervisor) ; Ramazani, Ahmad (Co-Advisor)
    The aim of this project is designing Suitable drilling fluid applicable in deep drilling. This aim will be reached by adding a temperature-resistant polymers or nanomaterials in water-based drilling fluid, Rheological properties of drilling fluid checked. Stability of rheological properties of drilling fluids not constant in HT state. Chain of cause and effect will happen, While the temperature increases, the viscosity and yield point of the fluids decreases. cuttings transportation and removal efficiency will be decreased due to reduction in yield point and viscosity. Evaluation of The effect of these cases conclude that these effects will also impact on filtration loss. The reason is that... 

    Dynamic Modeling of Foam in under Balance Drilling Operation

    , M.Sc. Thesis Sharif University of Technology Izadi, Saeed (Author) ; Jamshidi, Saeed (Supervisor)
    Underbalanced drilling is a type of drilling operation in which the pressure of the drilling fluid is less than the pressure of the formation. This pressure difference has created advantages for this method. Less formation damage, reduction of pipe stuck, increasing rate of penetration and production during drilling are the advantages of this method compared to traditional methods. To reduce the pressure of the drilling fluid, very low density fluids should be used. One way to reduce density is to mix a compressible fluid such as gas into water. Due to the difference in density and surface tensile strength of water and gas, these two phases do not combine, so a stable combination of these... 

    Characterization of Formation Damage Induced by Oil-Based Drilling Fluid and Proposing its Optimized Remedy

    , M.Sc. Thesis Sharif University of Technology Ahmadi, Amir (Author) ; Masihi, Mohsen (Supervisor) ; Tahmasbi, Koroush (Supervisor) ; Kalhor, Mojtaba (Co-Supervisor)
    During all operations in hydrocarbon reservoirs, there is a possibility of formation damage. These damages can reduce the production of fluids from reservoir. One of the major damages that can seriously affect the performance of a reservoir is the damage caused by drilling fluid. The main purpose of this research is to study the main mechanisms of formation damages when using oil-based drilling fluids and fixing or preventing these damages. Once the mechanisms are identified, it is tried to cure the damages but without acid-washing. The alternative method is surfactant-washing which is a surfactant-brine injection. This injection has been done for the first time. This study helps to industry... 

    The preparation and rheological investigation of polymer and hydrogel modified drilling mud

    , Article Petroleum Science and Technology ; Volume 30, Issue 10 , 2012 , Pages 1059-1068 ; 10916466 (ISSN) Tamsilian, Y ; Ramazani, S. A. A ; Khosravi, N ; Sharif University of Technology
    The authors carried out the study to prepare chitosan N-isopropylacrylamide hydrogel via heating and radiation processes. Properties investigation of prepared samples revealed that radiation prepared samples show higher yield and swelling ratios in comparison with the heating prepared ones. Effects of hydrogel addition to drilling mud on its important rheological properties such as apparent viscosity, plastic viscosity, and stress-strain behavior are measured. The rheological properties of hydrogel were compared with cellulosemethylcarboxyl and resins that are widely used in drilling fluid. The results demonstrate that whereas linear polymer effects on mud properties are more significant in... 

    Experimental investigation of self-repeating effect of different nanoparticles on internal mud cake formation by water-based drilling fluid in directional wells

    , Article Drilling Technology Conference 2016, 22 August 2016 through 24 August 2016 ; 2016 ; 9781613994504 (ISBN) Sedaghatzadeh, M ; Shahbazi, K ; Ghazanfari, M. H ; Zargar, G ; Sharif University of Technology
    Society of Petroleum Engineers 
    In this paper, the impact of three parameters including nanoparticles geometry, particles aggregation and borehole inclination on induced formation damage from water based drilling fluids were investigated by means of experimental studies. Accordingly, we designed a dynamic filtration setup capable to rotate and change well inclination. Nano-based drilling fluids consisting of spherical, cubical and tubular shapes nanoparticles as fluid loss additives were used. Mud cake quality, core permeability impairment and degree of formation damage at various well inclinations were examined. The cluster structure of aggregated particles were determined using fractal theory and applying dynamic light... 

    Application of Hydrated Basil Seeds (HBS) as the herbal fiber on hole cleaning and filtration control

    , Article Journal of Petroleum Science and Engineering ; Volume 152 , 2017 , Pages 212-228 ; 09204105 (ISSN) Movahedi, H ; Vasheghani Farahani, M ; Jamshidi, S ; Sharif University of Technology
    Elsevier B.V  2017
    Application of the fiber contained fluids has been extensively increased in many industries. In the petroleum industry, fibrous fluids are utilized for different applications. For instance, they have been applied in drilling operations for hole cleaning and cutting removal. In this article, the results of the studies performed on the application of Hydrated Basil Seeds (HBS) as the herbal eco-friendly fiber on hole cleaning and filtration control were presented. In order to investigate the application of HBS on hole cleaning, Polyacrylamide (PA) was added to the pure water to provide the base fluid and HBS at different concentrations were suspended in the base fluid and the effect of HBS on... 

    Improvement of non-aqueous colloidal gas aphron-based drilling fluids properties: role of hydrophobic nanoparticles

    , Article Journal of Natural Gas Science and Engineering ; Volume 42 , 2017 , Pages 1-12 ; 18755100 (ISSN) Hassani, A. H ; Ghazanfari, M. H ; Sharif University of Technology
    Application of the colloidal gas aphrons (CGAs) in minimizing formation damage by plugging pore mechanism is now wildly accepted due to numerous successful field experience. One of the pivotal factors which affects the pore blockage ability of micro-bubbles is their stability. This experimental study tries to investigate the possible synergistic effect of nanoparticles on improving the stability and other properties of non-aqueous CGA drilling fluids, in both bulk and porous media. In particular, two types of hydrophobic nanoparticles including silicon dioxide nanopowder coated with 2 wt% Silane and nanoclay, in presence of a treated version of bentonite (Bentone 34) as a stabilizer and... 

    Wettability alteration of carbonate rock by nonionic surfactants in water-based drilling fluid

    , Article International Journal of Environmental Science and Technology ; 2018 ; 17351472 (ISSN) Kiani, M ; Ramazani SaadatAbadi, A ; Jafari Behbahani, T ; Sharif University of Technology
    Center for Environmental and Energy Research and Studies  2018
    The influx of solid or liquid particles of drilling mud into the pores of rock or mud loss phenomenon and clay swelling can sometimes lead to severe productive formation damage and cause to wettability alterations of reservoir rock from hydrophilic to oleophilic. Therefore, designing an appropriate fluid that is compatible with formation fluids and could reduce reservoir damage and increase the productivity of wells is very important. The two main mechanisms of surfactants are reduction of the surface tension and wettability alteration of rock reservoir that are effective in taking the oil. Regarding the importance of the wettability in reservoir productivity, this article is aimed to study... 

    A novel field applicable mud formula with enhanced fluid loss properties in High Pressure-High temperature well condition containing pistachio shell powder

    , Article Journal of Petroleum Science and Engineering ; Volume 162 , March , 2018 , Pages 378-385 ; 09204105 (ISSN) Davoodi, S ; Ramazani Ahmad, S. A ; Jamshidi, S ; Fellah Jahromi, A ; Sharif University of Technology
    Elsevier B.V  2018
    Sustainable technologies are the main concerns of the 21st century modified oilfield industries. The insufficiency of conventional drilling fluid formulations with a combination of hardly degradable hazardous chemicals as additives raise the demands of field-applicable innovative and environmentally friendly methods. Pistachio Shell discards as degradable wastes, which can intellectually apply in drilling fluid formulation. The experimental oilfield investigations of utilizing pistachio shell powder prove the significant enhancement of rheological properties, reduction of fluid loss and mud cake thickness in both API (Low Pressure —Low Temperature) and High Pressure—High Temperature (HPHT)... 

    Mesoscopic rheological modeling of drilling fluids: Effects of the electrolyte

    , Article Journal of Petroleum Science and Engineering ; Volume 195 , 2020 Kariman Moghaddam, A ; Ramazani Saadatabadi, A ; Sharif University of Technology
    Elsevier B.V  2020
    Drilling fluid is a complex fluid, including base fluid and other materials, carrying out the vital functions during drilling operation such as cutting transport and controlling formation pressure. In order to optimize performance of a drilling process, a reliable rheological model is required in the computation of fluid flow dynamics. Time-independent Generalized Newtonian formulation are the most common models for describing the rheological behavior of drilling fluids due to its simplicity and ease of use, in spite the fact that they are not able to predict the normal stresses and could not consider effects of active components on the rheological behavior of the drilling fluid and also... 

    Insights into the pore-scale mechanisms of formation damage induced by drilling fluid and its control by silica nanoparticles

    , Article Energy and Fuels ; Volume 34, Issue 6 , 20 May , 2020 , Pages 6904-6919 Mohammadi, M ; Mahani, H ; Sharif University of Technology
    American Chemical Society  2020
    The formation damage (FD) caused by the invasion of drilling fluid severely affects reservoir performance during production. Most of the published research studies which address this type of FD have been carried out at the core or field scale. Thus, the main aim of the paper is to investigate the pore-scale mechanisms of FD induced by drilling fluids and their control with silica nanoparticles (NPs) using a microfluidic approach. The proper identification of the mechanisms of FD can lead to the proper selection of NP type and concentration as well as a suitable method to remediate FD. The micromodel was designed in a way to closely simulate the cross-flow at the wellbore surface. A... 

    Insights into application of acorn shell powder in drilling fluid as environmentally friendly additive: filtration and rheology

    , Article International Journal of Environmental Science and Technology ; Volume 18, Issue 4 , 2021 , Pages 835-848 ; 17351472 (ISSN) Davoodi, S ; Ramezani Saadat Abadi, A ; Rukavishnikov, V ; Minaev, K ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2021
    Conventional additives used in drilling fluid may have detrimental short- and long-term impacts on the surrounding environment. The employment of biodegradable green material in drilling fluid as alternative additives will eliminate these harmful impacts. In this study, acorn shell powder is proposed as a novel biodegradable additive for application in drilling fluid. First, the acorn shell powder was prepared and then characterized in terms of chemical structure, particle size, and morphology. The acorn shell powder, with four different concentrations, was then introduced into a water-based fluid; its functionality in the fluid system was evaluated with respect to rheological and filtration... 

    New insight into the filtration control of drilling fluids using a graphene-based nanocomposite under static and dynamic conditions

    , Article ACS Sustainable Chemistry and Engineering ; Volume 9, Issue 38 , 2021 , Pages 12844-12857 ; 21680485 (ISSN) Movahedi, H ; Jamshidi, S ; Hajipour, M ; Sharif University of Technology
    American Chemical Society  2021
    During oil and gas well drilling, the filtration control of bentonite water-based drilling fluids (BT-WBDFs), as an environmentally friendly fluid, is crucial to avoid formation damage and swelling shale problems. One of the most critical problems is undesirable changes in the rheology and filtration properties of the BT-WBDFs because of salt contamination. Herein, the potential of using both graphene oxide (GO) nanosheets and a graphene oxide-polyacrylamide (GO-PAM) nanocomposite is evaluated for controlling the filtration properties, especially in a salty medium. First, GO nanosheets were functionalized, and then the GO-PAM nanocomposite was synthesized using the solution polymerization... 

    Experimental Investigation of Water and Oil Based Colloidal Gas Aphron Drilling Fluid Performance Containing Nanoparticles in Formation Damage Reduction

    , M.Sc. Thesis Sharif University of Technology Hassani, Amir Hossein (Author) ; Ghazanfari, Mohammad Hossein (Supervisor) ; Rashtchian, Davood (Supervisor)
    In recent years, utilizing the colloidal gas aphron (CGA) drilling fluids is getting more and more commonplace due to their little formation damage and filtration loss. This study tries to investigate the effect of presence of nanoparticles and their type (hydrophobicity) on stability and performance of water and oil based CGA drilling fluids. This is done through analyzing stability, filtration, rheology, and pore blockage tests. Water and oil based CGA drilling fluids consisted of stabilizer, surfactant, and nanoparticles are generated and through examining of the effects of polymer, surfactant, and nanoparticle concentrations, the optimum formulation is obtained. High pressure-high... 

    Experimental Study on Hydrodynamic Behavior of Drilling Fluid by Fluidizing Granular Materials in an Annulus

    , M.Sc. Thesis Sharif University of Technology Esmailpour, Reza (Author) ; Jamshidi, Saeed (Supervisor) ; Molaei Dehkordi, Asghar (Supervisor)
    During the drilling process, cutting concentration in vertical and inclined wells is a common problem and major issue in designing hydraulic parameters. This is becoming more important in near bit area. Cutting transport usually is affected by several parameters such as mud rheology, flow rate, nozzle size, rotation speed, and mud weight.
    In this work it was aimed to design a new set-up to test all the factors on hole cleaning phenomenon especially in near bit area. The set-up consists of a 16 feet long flow loop, 3.28 feet height of the test section, and 3.33 inches inner diameter of the test section. Each parameter which has an impact on hole cleaning could be varied. The cutting... 

    Designing and Engineering of Lost Circulation Materials for Different Lost Circulation Scenarios

    , M.Sc. Thesis Sharif University of Technology Karimi Rad, Mohammad Saeed (Author) ; Goodarznia, Iraj (Supervisor) ; Tahmasebi, Korosh (Co-Advisor) ; kalhor, Mojtaba (Co-Advisor)
    Nowadays, one of the most major problems in drilling industry is Lost Circulation in different formations. Lost Circulation increases non-productive time, expenditures and environmental damages. Lost Circulation can happen in natural or induced fractures, cavernous formations and high permeable rocks and it can be subcategorized in seepage, medium, severe or complete type based on the severity of the problem. For addressing this issue, different methods are suggested. One of the most considered of these methods is using Lost Circulation Materials (LCM). In this thesis, it was tried to manage the situation with Designing and engineering of lost circulation materials for different lost... 

    Preparation of Heat Resistance Fluid Loss Controlling Drilling Fluids Using Pistachios Shell and Nano Graphene Oxide as Additives

    , M.Sc. Thesis Sharif University of Technology Davoodi, Shadfar (Author) ; Ramazani, Ahmad (Supervisor) ; Jamshidi, Saeed (Supervisor)
    Given that the mean of the cost of drilling operation related to the required martials and preparation of the drilling fluids, therefore, the design and construction drilling fluid which omit has to be a proper rheology is essential in drilling operations and oil industry. A desirable property of the drilling fluid is the minimum fluid loss volume which can be achieved by formation of a low permeability filter cake on the wellbore. Drilling fluid filtrating invasion into the formation can cause formation damage and reduction in the productivity of the well. In drilling fluids, a series of natural synthetic and polymers may be used as fluid (filtration) loss control additives. However, high... 

    Experimental Investigation of Formation Damage Caused by Wellbore Fluids Using Glass Micromodel

    , M.Sc. Thesis Sharif University of Technology Mohammadi, Mostafa (Author) ; Mahani, Hassan (Supervisor)
    During all operations in oil and gas reservoirs, it is possible to cause formation damage. These damages can greatly reduce the rate of production. One of the major damages that can seriously affect the performance of a reservoir is the damage caused by drilling fluid. The main purpose of this thesis is to study the main mechanisms of formation damage caused by water-based drilling fluid using a glass micromodel for the first time. An accurate understanding of the mechanisms of formation damage can provide a good understanding of the selection of the type and concentration of materials used, as well as appropriate methods to control and eliminate damages. for controlling the drilling fluid...