Alireza Rostami

Petroleum University of Technology | PUT · Department of Petroleum Engineering

The need to determine permeability at different stages of evaluation, completion, optimization of Enhanced Oil Recovery (EOR) operations, and reservoir modeling and management is reflected. Therefore, various methods with distinct efficiency for the evaluation of permeability have been proposed by engineers and petroleum geologists. The oil industr...

This paper focuses on developing a new method that represents user-accessible correlation for the estimation of water-based nanofluids viscosity. For this, an evolutionary algorithm, namely Gene Expression Programming (GEP), was adapted based on a wide selection of literature published databanks including 819 water-based nanofluids viscosity points...

This piece of study attempts to accurately anticipate the apparent viscosity of the viscoelastic surfactant (VES) based self-diverting acids as a function of VES concentration, temperature, shear rate, and pH value. The focus not only is on generating computer-aided models but also on developing a straightforward and reliable explicit mathematical...

Aquifer encroachments toward the producing gas zones can substantially decrease the volumetric gas flow rate due to the bypassing of large gas volumes in the porous media. It is well-known that the main parameter monitoring the cumulative gas production is the residual gas saturation; therefore, a complete information about strong aquifer drive gas...

Wettability alteration is an important mechanism when applying surfactants during enhanced oil recovery (EOR). Moreover, in carbonate reservoirs, the rock has more tendencies to be oil-wet than those of sandstone reservoirs. This is mainly arisen from the interaction amongst the carbonate surface chemistry exposed to the asphaltenic/aromatic compon...

The knowledge of reservoir permeability determination is increasingly important in petroleum engineering. Understanding the alteration of the abovementioned parameter as a dynamic characteristic of formations helps the characterization of reservoir rock. The existing models available for permeability determination are mainly developed for sandstone...

The Viscoelastic Surfactant (VES) based self-diverting acids, a recent generation of the acid diverters, has been widely applied to alleviate the non-uniform distribution of the treatment fluids into the heterogeneous porous medium. Measuring the rheological characteristics of the aforesaid acids is an unavoidable step in designing an acid stimulat...

The current study is aimed at developing straightforward and robust models for permeability prediction in heterogeneous carbonate oil reservoirs. Two heuristic methods including Group Method of Data Handling (GMDH) and Gene Expression Programming (GEP) were utilized to model the formation permeability with respect to the static parameters including...

Bubble point pressure is of great significance in reservoir engineering calculations affecting the success of reservoir simulation. For determining this valuable parameter, experimental tests are the most reliable techniques; however, these measurements are costly and timeconsuming. So, it is crucial to propose an empirical model for estimating bub...

Hydraulic fracturing has emerged as one of the best and most economic methods for enhancing oil recovery from low permeability reservoirs such as shale gas reservoirs. However, its performance will be negatively affected by fines migration due to hydraulic fracturing process. In the present study, it has been tried to experimentally investigate the...

The precise estimation of oilfield PVT properties is of primary importance for improving field evaluation and development strategies. In the present work, adaptive network-based fuzzy inference system (ANFIS) and genetic programming (GP) models were established for the accurate assessment of reservoir oil formation volume factor (OFVF). A large dat...

In this study, the methods of group method of data handling (GMDH) and gene expression programming (GEP) were used to develop symbolic correlations for truthful viscosity estimation of n-tetradecane/bitumen mixture. A number of graphical and statistical tools were utilized to make evident the omnipotence of the proposed models as compared to the pu...

Superior physicochemical properties of ionic liquids (ILs) including dissolution potential for a large number of compounds, recyclability, suitable thermal stability, tuneability characteristics and trivial volatility make them attention-grabbing in electrochemistry and chemical industries. Owing to this fact, the accurate knowledge of ILs properti...

The deposition of inorganic scales, especially calcium sulfate (CaSO 4 ), in oil reservoirs causes damages not only in the reservoir, but also in production equipment, injection facilities, and production and injection tubing. In the present study, it was aimed to evaluate the formation damage potential of high and low salinity water injection and...

Low salinity (LS) water injection has emerged as one the most promising methods of improved oil recovery (IOR). However, its performance is often adversely affected by permeability damage due to induced fines migration phenomenon. Although a number of studies considered this phenomenon, no appropriate and global remedy has been proposed to tackle t...

Permeability estimation has a major role in mapping quality of the reservoir, reservoir engineering calculation, reserve estimation, numerical reservoir simulation and planning for the drilling operations. In carbonate formations, it is of great challenge to predict permeability by reason of natural heterogeneity, nonuniformity of rock, complexity...

Mineral scaling has been considered a great concern for developing the oil production from the underground petroleum reservoirs. One of the main causes of this phenomenon is known as the chemical incompatibility of injected brine, frequently sea water, with the reservoir brine leading to the deposition of various supersaturated salts such as calciu...

One of the main issues of wastewater treatment is the silica deposition in steam turbines. Evaporation of silica with the steam in adequate concentration is one of the main sources of scale formation in steam turbines. In this study, the authors introduce the utilization of a genetic‐based approach—gene expression programming (GEP)—for solubility p...

Among different types of enhanced oil recovery (EOR) methods, gas injection or more specifically and commonly, CO2 injection has been much in practice with the average recovery factor of 7 to 23% over the globe. The large availability, low cost and easily achieved miscibility condition are the main advantages of CO2 injection over the other sources...

Ionic liquids (ILs) are a significant class of chemicals with applications in solar cells, sensors, capacitors, batteries, plasticizers and thermal fluids. These compounds have attracted wide attention due to their low vapor pressure, tunable viscosity, non-flammability, wide liquid region phase diagrams and substantial chemical and thermal stabili...

Capability of solution viscosity increment of hydrolyzed polyacrylamide (HPAM) is the key parameter in its successful applications as one of the widely used polymers especially in chemistry, and chemical and petroleum engineering. However, experimental measurement of HPAM solution viscosity is time-consuming and can be expensive for elevated condit...

In this study, two powerful intelligent algorithms called Group Method of Data Handling (GMDH) and Gene Expression Programming (GEP), are employed to calculate the MMP parameter during N2-flooding. To this end, two mathematical equations with respect to reservoir temperature (TR), molecular weight of heptane plus fraction (MWC7+), average critical...

Minimum miscibility pressure (MMP) is the most significant parameter monitoring the effciency of CO2 ⁠ flooding by establishing the miscibility condition in the oil reservoirs resulting in a higher ultimate oil recovery factor. To date, considerable investigations on CO2 ⁠ -MMP determination have been implemented; however, developing more universal...

A large portion of the total oil-in-place around the globe is composed of heavy/ultra-heavy oils and bitumen. The main challenge for producing bitumen is its large viscosity inhibiting the easy fluid flow through the pipeline transportation and wellbore productions. In this study, genetic programming (GP) as a powerful strategy was utilized to deve...

In present study, the asphaltene precipitation was examined through pendant drop method regarding the impacts of oil composition, solvent type and concentration in both atmospheric and elevated pressures. Consequently, it is observed that there is a specific region for solvent concentration, in which the surface activity of nC5 is more than nC7 lea...

CO 2 solubility is one of the most important parameters that affects CO 2 flooding, because gas dissolution into crude oil results in oil swelling, viscosity reduction, IFT reduction, oil mobilization, and oil recovery improvement. Therefore, a better understanding of CO 2 solubility mechanisms and its influence on physical properties of crude oil...

Extremely high viscosity of bitumen is of great challenge in bitumen production, transportation, and processing. Therefore, different techniques such as dilution of bitumen by liquid solvents have been proposed for bitumen viscosity reduction. Accurate prediction of diluted bitumen mixture viscosity is a key parameter in solvent injection during hy...

The current study plays a major role in modeling natural gas viscosity in terms of several operating parameters including pseudo-reduced properties and molecular weight through radial basis function neural network (RBFNN), least-squares support vector machine (LSSVM), and multilayer perceptron neural network (MLPFNN). As it known, an important feat...

Surfactant 2-amino-5-dodecyl benzene sulfonic acid (ADBSA) was prepared and tested as crude oil emulsions demulsifier. Electrical conductivity method was used to obtain the critical micelle concentration of surfactant. A critical micelle concentration value of 0.225 wt.% was observed. Bottle testing measurements were performed to investigate the ef...

Nowadays, incredible growth of the energy consumption has changed the global attention to the production and utilization of the heavy crude oils such as bitumen resources around the globe. Amongst the bitumen properties, density is an important parameter which improves bitumen recovery efficiency and transportation quality. For easy production of b...

CO2 flooding into the petroleum reservoirs has gained much universal attentions owing to the benefits originated from the reduction of greenhouse gas emission and enhanced oil recovery (EOR). Among the all parameters applied for determining the feasibility of a particular CO2 EOR project especially in the miscible mode, solubility of CO2 has a vita...

Interfacial phenomenon between CO2 and aqueous phases affects the distribution and behavior of fluids in porous media, and also plays a major role in determining the usefulness of enhanced oil recovery methods particularly CO2 flooding. Therefore, in this study, the interfacial tension (IFT) between CO2 and brine is predicted as a function of the t...

Triethylene Glycol (TEG) is one of the most frequently applied liquid desiccants in natural gas dehydration. For this purpose, minimum concentration of TEG is necessary to achieve the outlet gas water dewpoint specification. Several empirical models have been developed to predict the equilibrium established between water vapor and TEG; however, the...

Selection of CO2 as an injection gas for enhanced oil recovery (EOR), is more desired as it could be employed for the aims of CO2 sequestration resulting in the greenhouse gas reduction as well. Thermal conductivity of supercritical CO2 is one of the most important thermophysical properties in designing CO2 injection into the reservoir. In detail,...

Enhanced oil recovery (EOR) from carbonate reservoirs is of great challenge due to the complex geology that originated from high rock heterogeneity and viscous fingering phenomenon during a displacement process. One of the highly applicable EOR approaches is the utilization of surfactant especially for the aims of foam generation, wettability alter...

Gas thermal conductivity is one of the thermophysical properties that inevitably enters into mathematical models of real systems used in the design of chemical engineering processes or in the gas industry. In this study, via implementing a powerful and newly applied equation generator algorithm known as, genetic programing (GP) mathematical strateg...

Global warming due to greenhouse effect has been considered as a serious problem for many years around the world. Among the different gases which cause greenhouse gas effect, carbon dioxide is of great difficulty by entering into the surrounding atmosphere. So CO2 capturing and separation especially by adsorption is one of the most interesting appr...

One of the efficient and reasonable choices for solid waste disposal is waste combustion leading to the generation of a renewable source of energy. In present work, a statistical machine learning technique, namely, least-square support vector machine was created to compute the higher heating value in relation to elemental compositions. The used dat...

The interfacial tension (IFT) of water-hydrocarbon system is one of the most important parameters in various fields of chemical, petroleum and process industries. Laboratory measurement of interfacial tension is laborious, time demanding and involves costly experimental setup. Current study presents genetic programming (GP) as a powerful tool in or...

Taking preventive measures of asphaltene precipitation is of great significance in petroleum production and development. Therefore, a new chemical remediation was developed in the current study. The major objective of this experimental study is investigation of the effects of chemically extracted henna on the behaviour of asphaltene in the Bangesta...

Surfactants can play major role in increasing oil recovery factor through interfacial tension reduction. In the present study, a new synthetic method was used to prepare (S)-2-amino-6-dodecanamidohexanoic acid, an amino acid–based surfactant then it was applied as an oil recovery agent for the first time. The structure of this surfactant was studie...

Among the most significant physical characteristics of porous media, the effective thermal conductivity (ETC) is used for estimating the thermal enhanced oil recovery process efficiency, hydrocarbon reservoir thermal design, and numerical simulation. This paper reports the implementation of an innovative least square support vector machine (LS-SVM)...

It has been proven that the common Arps empirical decline curve analysis (DCA) to be an extensively used tool for many years, however, it has much error in production forecasting. In the past, engineers forecasted the oil production rates without understanding of the reservoir engineering principals behind and without having the reservoir propertie...