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Pore-scale study of the effects of DTPA chelating agent flooding on oil recovery utilizing a clay-coated micromodel

Petroleum Research 2024年第2期9卷 228-237页

作者： Hojjat Mohammadzadeh jamshid moghadasi.khalil shahbazi Shahin Kord Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwazIran

The use of diethylenetriaminepentaacetic acid(DTPA)chelating agent has shown promising results for enhanced oil recovery(EOR)in prior *** mechanisms,mainly resulting from rock-fluid interaction,have been proposed for chelating agent flooding;however,little attention has been paid to fluid-fluid interaction thus *** assessment of these mechanisms has primarily relied on macroscopic techniques such as core *** paper aims to investigate the injection of DTPA brine and its dominant mechanisms at the pore scale using a clay-coated *** micromodel tests were performed under oil-wet and water-wet *** a more precise examination of fluid/fluid interactions,the dynamic interfacial tension(IFT)and Zeta potential were *** was observed that the injection of DTPA brine in water-wet state changed the saturation distribution and increased oil *** on visual inspections,this change in saturation distribution could potentially be linked to the formation of micro-dispersions and viscoelastic interfacial ***-dispersions facilitate flow to unswept areas,and viscoelastic interface formation reshapes the interface between oil and brine,causing disconnected oil droplets to coalesce and thus increase *** the oil-wet state,the micro-dispersion formation and wettability alteration can be the dominant mechanisms,and the amount of recovered oil was higher than that observed in the water-wet ***,Zeta potential measurements at the interface between brine and oil showed a more negative value for DTPA brine,which is effective in wettability alteration and micro-dispersions *** results indicate that IFT reduction was not significant enough to be considered the dominant mechanism,although it assists in DTPA brine penetration into the crude oil and subsequent micro-dispersion formation.

关键词： Enhanced oil recovery technique Chelating agent Micromodel Fluid/fluid interaction Micro-dispersions Viscoelastic interface

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A novel correlation approach for prediction of natural gas compressibility factor

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Journal of Natural Gas Chemistry 2010年第2期19卷 189-192页

作者： Ehsan Heidaryan Amir Salarabadi jamshid moghadasi Faculty of Energy Kermanshah University of TechnologyKermanshah ***Iran Ilam Gas Treating Company IlamIran Petroleum Engineering Department Petroleum University of TechnologyAhwazIran

Gas compressibility factor （z-Factor） is one of the most important parameters in upstream and downstream calculations of petroleum *** importance of z-Factor cannot be overemphasized in oil and gas engineering *** experimental measurements,Equations of State （EoS） and empirical correlations are the most common sources of z-Factor *** are more than twenty correlations available with two variables for calculating the z-Factor from fitting in an EoS or just through fitting ***,these correlations are too complex,which require initial value and more complicated and longer computations or have magnitude *** purpose of this study is to develop a new accurate correlation to rapidly estimate *** of this correlation is compared with large scale of database and experimental data *** correlation has 1.660 of Absolute Percent Relative Error （EABS） versus Standing and Katz chart and has also 3.221 of EABS versus experimental *** output of this correlation can be directly assumed or be used as an initial value of other implicit *** correlation is valid for gas coefficient of isothermal compressibility （cg） calculations also.

关键词： natural gas compressibility factor Standing and Katz chart correlation

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A new and reliable model for predicting methane viscosity at high pressures and high temperatures

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Journal of Natural Gas Chemistry 2010年第5期19卷 552-556页

作者： Ehsan Heidaryan jamshid moghadasi Amir Salarabadi Faculty of Energy Kermanshah University of Technology Petroleum Engineering Department Petroleum University of TechnologyAhwaz 63431Iran Ilam Gas Treating Company

In recent years, there has been an increase of interest in the flow of gases at relatively high pressures and high temperatures. Hydrodynamic calculation of the energy losses in the flow of gases in conduits, as well as through the porous media constituting natural petroleum reservoirs, requires knowledge of the viscosity of the fluid at the pressure and temperature involved. Although there are numerous publications concerning the viscosity of methane at atmospheric pressure, there appears to be little information available relating to the effect of pressure and temperature upon the viscosity. A survey of the literature reveals that the disagreements between published data on the viscosity of methane are common and that most investigations have been conducted over restricted temperature and pressure ranges. Experimental viscosity data for methane are presented for temperatures from 320 to 400 K and pressures from 3000 to 140000 kPa by using falling body viscometer. A summary is given to evaluate the available data for methane, and a comparison is presented for that data common to the experimental range reported in this paper. A new and reliable correlation for methane gas viscosity is presented. Predicted values are given for temperatures up to 400 K and pressures up to 140000 kPa with Average Absolute Percent Relative Error （EABS） of 0.794.

关键词： methane viscosity falling body viscometer high pressures high temperatures correlation

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A simulation approach: Miscible carbon dioxide injection in a carbonate reservoir

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Petroleum Science 2010年第2期7卷 257-262页

作者： Ehsan Heidaryan jamshid moghadasi Marylena Garcia Quijada Faculty of Energy Kermanshah University of Technology Petroleum Engineering Department Petroleum University of Technology Texas A&M University College Station Texas USA

The purpose of this study is to optimize the existing carbon dioxide （CO2） flood in deep dolomite formations by improving oil sweep efficiency of miscible CO2 floods and enhancing the conformance control. A full compositional simulation model using a detailed geologic characterization was built to optimize the injection pattern. The model is a quarter of an inverted nine-spot and covers 20 acres of field formation. Geologic description was used to construct the simulation grids. The simulation layers represent actual flow units and resemble the large variation of reservoir properties. History match was performed to validate the model. Several sensitivity runs were made to improve the CO2 sweep efficiency and increase the oil recovery. Finally, the optimum CO2 injection rate for dolomite formations was determined approximately. Simulation results also indicate that a water-alternating-gas （WAG） ratio of 1：1 along with an ultimate CO2 slug of 100% hydrocarbon pore volume （HCPV） will allow an incremental oil recovery of 18%. The additional recovery increases to 34% if a polymer is injected as a conformance control agent during the course of the WAG process at a ratio of 1：1. According to the results, a pattern reconfiguration change from the nine spot to staggered line drive would represent an incremental oil recovery of 26%.

关键词： Miscible injection carbon dioxide dolomite formation water-alternating-gas

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A new high performance gas hydrate inhibitor

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Journal of Natural Gas Chemistry 2010年第3期19卷 323-326页

作者： Ehsan Heidaryan Amir Salarabadi jamshid moghadasi Alireza Dourbash Faculty of Energy Kermanshah University of Technology Ilam Gas Treating Company Petroleum Engineering Department Petroleum University of Technology School of Chemical Engineering University of Tehran Research Institute of Petroleum Industry-Kermanshah campus

In petroleum exploration and production operations,gas hydrates pose serious flow assurance,economic and safety *** inhibitors are widely used to reduce the risks associated with gas hydrate *** the present study,systematic laboratory work was undertaken to determine synergistic effects between methanol and a Poly Vinyl Methyl Ether as Low Dosage Hydrate Inhibitors（LDHIs）.A valuable effect was discovered at a certain ratio of methanol to the low dosage hydrate inhibitor.

关键词： gas hydrate methanol poly vinyl methyl ether low dosage hydrate inhibitors

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Investigation of production depletion rate effect on the ne ar-wellbore stresses in the two Iranian southwest oilfields|

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Petroleum Research 2020年第4期5卷 347-361页

作者： khalil shahbazi Amir Hossein Zarei Alireza shahbazi Abbas Ayatizadeh Tanha Faculy Member of Petroleur University of Technologx Iran Ahwaz Faculy of Engineering Petroleurm University of Techunology Iran National lrunion Driling Compury Well Logging DepartmentAhwazlran

Effect of depletion rate on wellbore stability due to production of oil from hydrocarbon-bearing reser-voirs is important and can result in a reduction of the reservoir pore pressure.A reduction in the reservoir pressure,in tum,results in a change in the stresses acting within the *** these changes are not well analyzed and applied in future calculations,we may be unsuccessful in some cases such as drilling infill wells or extended wells,forecast of sand production and optimum flow rate,preventing of casing collapse,***,knowing the stresses around the well at every stage of production is fundamental to the next *** this paper,we recognized these changes in near-wellbore stresses using data from logging(image log,dipole sonic,full set log,mud log),production data,infor-mation from kick,blow out,loss *** determined it using Techlog software and theoretical *** wells of two huge oilfields of sw Iran were investigated after depletion or production for long *** each well,state of stresses were calculated in cases of safe drilling mud weight using log data and theoretical *** the end effect of depletion rate on wellbore stability was investigated in these three wells.

关键词： Depletion rate Wellbore stability Pore pressure Sand production Near-wellbore stress

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Experimental investigation of the application of Eucalyptus bark to prevent lost circulation in pay zones with acid dissolution capability

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Petroleum 2021年第2期7卷 152-159页

作者： Mostafa Sedaghatzadeh khalil shahbazi Peyman Pourafshary Seyed Ali Razavi National Iranian Drilling Company Ahvaz90161635Iran Petroleum University of Technology Abadan***Iran School of Mining and Geoscience Nazarbayev UniversityNur-Sultan010000Kazakhstan

Loss of drilling fluid is a common problem during the drilling of wells and it restricts the appropriate functionality of *** fluid loss significantly increases drilling costs and non-productive time as well as the drilling operation *** investigations have been carried out in order to find appropriate mud additives that either block fractures and pores or reduce fluid loss by improving the fluid ***,environmentally friendly and effective additives are still required by the drilling ***,the application of available materials in each region,to produce appropriate additives,is a challenge for the oil *** this study,Eucalyptus Camaldulensis(EUC)bark powder has been chosen as a new,fibrous,cheap,environmentally friendly and available material to control fluid loss,particularly in southern *** characterization tests,such as acid dissolution and fluid loss control,were carried out to study the performance of the new proposed *** by hydrochloric acid and sulfuric acid were studied at various acid concentrations and *** fluid loss was also measured at different EUC *** study showed that EUC powder can reduce the final fluid loss by 88-97%,the initial fluid loss by 45-66%,and the total loss by 87e94%,which is a satisfactory level.

关键词： Eucalyptus bark Lost circulation Acid solubility Drilling mud Fluid loss

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Investigation of trend between porosity and drilling parameters in one of the Iranian undeveloped major gas fields

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Petroleum Research 2023年第1期8卷 63-70页

作者： Abbas Ayatizadeh Tanha Amirhossein Parizad khalil shahbazi Hassan Bagheri Department of Chemical Engineering Tarbiat Modares UniversityTehranIran National Iranian Drilling Company Well Logging DepartmentAhwazIran Petroleum Engineering Department Petroleum University of TechnologyAhwazIran Petroleum Exploration College of Mining EngineeringUniversity of TehranIran

Porosity is one of the main parameters that should be considered when a gas or an oil field is ***,the availability of porosity is crucial in any rock and formation ***,this parameter is not always available and direct measurement is scarce and usually is confined to appraisal phase of a ***,in this study it is aimed to find a relationship in order to estimate porosity in afterward *** data of 5 appraisal wells of an undeveloped gas field has been gathered to perform this *** full set wireline logging data and drilling data were *** data inherit high level of fluctuation which is normal with respect to real direct measured *** smoothed curving was utilized and as a result,the fluctuation was diminished considerably and the feasibility of carrying out the investigation was being established,*** normalize and gather drilling data in a parameter in order to have a better view and investigation,sigmalog method was *** was observed that there is a clear exponential relationship between porosity and drilling data and curve fitting was utilized to conduct a numerical *** curve fitting was established with R^(2)=0.83 and a trustworthy fitting *** results demonstrate the possibility of porosity estimation by using drilling ***,a numerical relationship is given for a specific *** porosity estimation can lead to better analysis of newly drilled rocks and formations leading to more efficient field development strategies.

关键词： Porosity Drilling data Sigmalog D exponent Wireline logging

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Comparison of accuracy and computational performance between the machine learning algorithms for rate of penetration in directional drilling well

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Petroleum Research 2021年第3期6卷 271-282页

作者： Omid Hazbeh Saeed Khezerloo-ye Aghdam Hamzeh Ghorbani Nima Mohamadian Mehdi Ahmadi Alvar jamshid moghadasi Faculty of Earth Sciences Shahid Chamran UniversityAhwazIran Department of Petroleum Engineering Amirkabir University of TechnologyTehranIran Young Researchers and Elite Club Ahvaz BranchIslamic Azad UniversityAhvazIran Young Researchers and Elite Club Omidiyeh BranchIslamic Azad UniversityOmidiyehIran Faculty of Engineering Department of Computer EngineeringShahid Chamran UniversityAhwazIran Petroleum Engineering Department Petroleum Industry UniversityAhvazIran

Oil and gas reservoirs are of the main assets of countries possessing *** from these reservoirs is one of the main concerns of engineers,which can be achieved by drilling oil and gas *** of hydrocarbon wells is one of the most expensive operations in the oil *** of the most important parameters affecting drilling cost is the rate of penetration(ROP).This paper predicts the rate of penetration using artificial intelligence and hybrid models on Kaboud oil field well#7 in the directional *** this study,different models were constructed through various approaches based on 1878 dataset obtained from drilling operation in the well#***,the accuracy of the constructed models was compared with each *** was found that the MLP-ABC algorithm predicts the rate of penetration more accurately,by far,as compared with other *** MLP-ABC algorithm achieves impressive ROP prediction accuracy(RMSE=0.007211 m/h;AAPD=0.1871%;R^(2)=1.000 for the testing subset).Consequently,it can be concluded that this method is applicable to predict the drilling rate in that oilfield.

关键词： Rate of penetration Artificial intelligence Directional drilling MLP Prediction

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Shale hydration inhibition characteristics and mechanism of a new amine-based additive in water-based drilling fluids

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Petroleum 2017年第4期3卷 476-482页

作者： Pezhman Barati khalil shahbazi Mosayyeb Kamari Amir Aghajafari Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwaz63431Iran Reservoir Evaluation Department National Iranian South Oil CompanyAhwazIran

In this work,shale hydration Inhibition performance of tallow amine ethoxylate as a shale stabilizer in water based drilling fluid,was investigated through these tests:bentonite hydration inhibition test,bentonite sedimentation test,drill cutting recovery test,dynamic linear swelling test,wettability test,isothermal water adsorption test,and zeta potential *** results showed that bentonite particles are not capable of being hydrated or dispersed in the mediums containing tallow amine ethoxylate;tallow amine ethoxylate had shown a comparable and competitive inhibition performance with potassium chloride as a common shale stabilizer in drilling *** amine functional groups exist in tallow amine ethoxylate structure which are capable of forming hydrogen bonding with surfaces of bentonite *** phenomenon decreased the water adsorption on bentonite particles'surfaces which results in reduction of *** amine ethoxylate is also compatible with other common drilling fluid additives.

关键词： Drilling fluids Dynamic linear swelling Hydrogen bond Mechanism Shale stabilizer Tallow amine ethoxylate Wettability Zeta potential Amine-based additive

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