Ghasem Zargar

Petroleum University of Technology | PUT · Ahvaz Center for Petroleum Research

A new nanocomposite (NC) comprising of ZnO nanoparticles and polyacrylamide (PAM) polymer hybrid agent is investigated for enhanced oil recovery in sandstone and carbonate rocks. A range of measurements are conducted to examine the behavior of NCs including NC synthesis and characterization, NC physical properties, stability analysis, IFT, and wett...

Synthetic water-soluble polymers, such as acrylamide-based compounds, i.e., partially hydrolyzed polyacrylamide (HPAM), are well known for polymer flooding in enhanced oil recovery (EOR) and drilling fluid supplement for well-drilling operations. However, these types of polymers have low thermal stability and mechanical resistance. Therefore, it wa...

Numerous studies have been presented in the literature on the effect of the combination of nanoparticles and surfactants on enhanced oil recovery (EOR). In this study, we investigated the synergistic effect of synthesized Nanocomposite ([email protected]) and surfactant on enhanced oil recovery by performing zeta potential (evaluation of chemicals...

More than half of the oil and gas resources of the world are hosted in carbonate reservoirs. Also, a total of 60% of their residual oil is left unswept during conventional primary and secondary oil recovery operations. The complexity of carbonate reservoirs due to relative weak water imbibition, undesired capillary forces, low permeability (less th...

well test analysis is a method for evaluating the average properties of the reservoir ‎by characterizing the ability of the fluid to flow through the reservoir and to the ‎well. Well test output parameters that descript reservoir are permeability, reservoir ‎heterogeneities, boundaries and pressure; also, parameters that descript well are skin ‎fac...

Formation damage is a general term, which refers to any process that reduces the production or injectivity of an oil well. Clay swelling formation damage, due to incompatible fluid invasion, is a common problem in the petroleum industry. In this research, the effect of Acanthophyllum root extract (ACRE) , a bio-based surfactant, on the reduction in...

Silicon dioxide nanoparticles (NPs) are known as one of the most widely utilized materials in the area of the nanotechnology of enhanced oil recovery (Nano-EOR) processes. However, its dynamic characteristics and performance require a deep understanding at the atomistic scale. Accordingly, in this research, molecular dynamics (MD) was used to inves...

Surfactant flooding is a proven chemical Enhanced Oil Recovery (cEOR) method. Commonly/commercially available surfactants impose adverse impacts on the environment and even human health. Thus, finding green surfactants is of interest to petroleum engineers to implement cleaner EOR processes. In the current study, a novel surfactant, namely (S)-2-...

Production from mature oil reservoirs can be optimized by using the surfactant flooding technique. This can be achieved by reducing oil and water interfacial tension (IFT) and modifying wettability to hydrophilic conditions. In this study, a novel green non-ionic surfactant (dodecanoyl-glucosamine surfactant) was synthesized and used to modify the...

In this study, a new strategy based on integrating geostatistical seismic inversion and optimized support vector regression (OSVR) will be utilized to transform multi seismic attributes to sand fraction log. In first step, owing to compatibility relation between acoustic impedance (AI) and sand fraction, a high resolution value of this important at...

Nanoparticles (NPs) have shown showed a promising role in improving oil recovery as potential enhanced oil recovery (EOR) agents. In this study, one-pot green technique was used to synthesize titanium oxide NPs from the euphoria condylocarpa extract, and graft it on the surface of quartz to develop a green nanocomposite (NC) for enhanced oil recove...

Nanoparticles (NPs) have shown showed a promising role in improving oil recovery as potential enhanced oil recovery (EOR) agents. In this study, one-pot green technique was used to synthesize titanium oxide NPs from the euphoria condylocarpa extract, and graft it on the surface of quartz to develop a green nanocomposite (NC) for enhanced oil recove...

Surfactant flooding as conventional chemical enhanced oil recovery (cEOR) was widely used to improve oil from the matured-producible reservoirs. Currently, nanoparticles (NPs) earned the vast attraction in EOR applications due to their sizes and physiochemical properties that possibly influence the viscosity, attraction, and IFT specifications of t...

Formation damage during underbalanced drilling is created due to the spontaneous counter-current imbibition when drilling mud is in contact with saturated formations. Therefore, it should be appropriately recognized and investigated. The objective of this study is to develop a numerical model to simulate the penetration rate of drilling mud in the...

This work highlights the application of Artificial Neural Networks optimized by Cuckoo optimization algorithm for predictions of NMR log parameters including porosity and permeability by using field log data. The NMR logging data have some highly vital privileges over conventional ones. The measured porosity is independent from bearer pore fluid an...

Surfactant flooding is an important technique used to improve oil recovery from mature oil reservoirs due to minimizing the interfacial tension (IFT) between oil and water and/or altering the rock wettability toward water-wet using various surfactant agents including cationic, anionic, non-ionic, and amphoteric varieties. In this study, two amino-a...

Screening analysis is a useful guideline which helps us with proper field selection for different enhanced oil recovery processes. In this work, reservoir simulation is combined with experimental design to estimate main effects and possible interactions of reservoir rock and fluid properties on performance of different gas injection processes in na...

Surfactant injection is an important chemical enhanced oil recovery (EOR) technique with beneficial impacts for oil recovery from subsurface reservoirs due to interfacial tension (IFT) reduction and wettability alteration. However, most of the available or proposed synthetic surfactants have negative environmental impacts. Here, a novel synthesis p...

Polymer flooding at high temperature and high salinity is a new challenge in the petroleum industry. C ommonly used polymers are not effective at high temperatures and high salinity, and under harsh conditions, they are degraded and reduced viscosity. In this study, a combination of two synthetic polymers namely SAV37 and AN125VHM was used for poly...

Heat EXchangers (HEX) that are used in City Gate Station (CGS) systems are modeled numerically to recover the exhaust waste heat. It was tried to find the best viscous model to obtain results in accordance with experimental results and to change the heat exchanger design. This HEX is used for recovering heat from exhaust flue gas with a mixture of...

Estimation of rock mechanic parameters is an important issue in reservoir management. Uniaxial compressive strength (UCS) and elastic modulus are the most important factors in determining the rock mechanic parameters in petroleum engineering studies. Accessibility to the parameters in fields such as designing fracture, analyzing of wellbore stabili...

Development of reliable and accurate models to estimate carbon dioxide–brine interfacial tension (IFT) is necessary, since its experimental measurement is time-consuming and requires expensive experimental apparatus as well as complicated interpretation procedure. In the current study, feed forward artificial neural network is used for estimation o...

Most of the synthetic surfactants investigated with the aim of enhanced chemically oil recovery in the literature have environmental drawbacks. In this work, application of an environmentally-friendly synthetic surfactant as an enhanced oil recovery agent is introduced by measuring interfacial tension of water–kerosene systems and wettability alter...

Recent investigations have proved more worldwide availability of heavy crude oil resources such as bitumen than those with conventional crude oil. Diluting the bitumen through injection of solvents including tetradecane into such reservoirs to decrease the density and viscosity of bitumen has been found to be an efficient Enhanced Oil Recovery appr...

The low salinity waterflooding (LSW) technique has become one of the mostimportant research topics in the oil industry because of its possible advantagesfor improving oil recovery compared to conventional seawater injection.Researchers have proposed several mechanisms for the LSW process in theliterature; however, there is no consensus on a single...

Low salinity waterflooding (LSW) is an applicable, simple and cheap enhancedoil recovery (EOR) technique for improving oil recovery from sandstone andcarbonate reservoirs. The main mechanism of improving oil recovery by lowsalinity water flooding is wettability alteration and residual oil saturationdecrease. In this study, a sector of a fractured c...

In this paper, a new robust approach based on Least Square Support Vector Machine (LSSVM) as a proxy model is used for an automatic fractured reservoir history matching. The proxy model is made to model the history match objective function (mismatch values) based on the history data of the field. This model is then used to minimize the objective fu...

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. nanobased d...

ver half of the original oil in place is retained in a reservoir after the accomplishment of primary and secondary production schemes. The implementation of chemical stimulation such as surfactant flooding as tertiary-stage recovery methods as part of an enhanced oil recovery (EOR) technique is inevitable. -By far, most of the surfactants utilized...

In most of the surfactant-based petroleum applications, critical micelle concentration (CMC) value of the surfactant is generally utilized as the optimized concentration. On the other hand, most of the synhtetic surfactants utilized in oil industry are not environmentally-friendly and can therefore contaminate the environment. In this paper, using...

Due to the severe and costly problems caused by asphaltene precipitation in petroleum industry, developing a quick and accurate model, to predict the asphaltene precipitation under different conditions, seems crucial. In this study, a new model, namely genetic algorithm – support vector regression (GA-SVR) is proposed, which is applied to predict t...

A novel synthetic method was developed to prepare a difunctional surfactant using sulfanilic acid and dodecyl bromide. In the first step, sulfanilic acid was protected by acetic anhydride. Then, Friedel–Crafts alkylation of the synthesized acetanilide with dodecyl bromide was performed in the presence of aluminum chloride. The protecting group (ami...

Cementation exponent (m) is one of the most important parameters in calculation of water saturation from Archie's equation especially in heterogeneous carbonate reservoirs. The complexity and wide variations in the nature of pore systems in these reservoirs causes the cementation exponent to be variable with depth and ignoring this variation will l...

Water-alternating-gas (WAG) injection process is one of innovative and new enhanced oil recovery (EOR) methods. This method by improving gas injection microscopic and water injection macroscopic displacement processes, due to water-alternating-gas injection and influenced reservoir intact regions in comparison to conventional water-gas injection ap...

Classical seismic methods for characterization of hydrocarbon reservoirs have been used for decades. Stratigraphic events affect seismic sections in addition to structural events. Today the necessity of usage of seismic sections to determine reservoir extension and stratigraphic characteristics is increasing. Conventional seismic sections cannot di...

Conventional seismic sections cannot display most of the important events in reservoir studies. The study of frequency content of seismic sections can provide better understanding to geoscientists, as well as interpreters in the field of petroleum engineering studies. An isofrequency process is a powerful tool in terms of reservoir imaging. One of...