Research Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701Entropy Analysis within Rotating Cylinders of Annulus for Giesekus Viscoelastic Fluid111107910.22078/jpst.2020.4066.1652ENMehdiMoayed MohseniDepartment of Chemical Engineering, Amirkabir University of Technology, Tehran, IranJournal Article20200130Entropy analysis, along with convective heat transfer within rotating cylinders of the annulus, is presented using a purely analytical approach for Giesekus rheological model. Two different types of boundary conditions are considered: (a) the constant and different temperature at walls, (b) constant heat flux at the outer wall, and constant temperature at the inner wall. Also, the derived velocity and temperature profiles are coupled in the entropy equation for obtaining the volumetric entropy-generation and the Bejan number expressions. Moreover, the effects of Deborah number (De), mobility factor (α), group parameter (Br/Ω), Brinkman number (Br), and velocity ratio (β) on the above parameters are investigated. Ultimately, results indicate that increment of Brinkman number and group parameters increases irreversibility except when both cylinders rotate with identical angular velocity in the same direction.<br /> https://jpst.ripi.ir/article_1079_43baa6762fa81bb43b39c62553b2970d.pdfResearch Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701Adsorption of CH4 and CO2 on Cu-BDC Metal-Organic Frameworks Synthesized Using Different Solvent Separation Routes1219108010.22078/jpst.2020.4023.1638ENMaryamKhaliliDepartment of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, IranEnsiyehGanjiGas Refining Technologies Division, Research Institute of Petroleum Industry (RIPI), Tehran, IranArminTaheriYoung Researcher and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, IranMahnazPourkhalilNanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, IranJournal Article20200203Energy storage is one of the major challenges during the last decades. Natural gas adsorption on porous materials has notable advantages in comparison with the other approaches. Due to the lack of adsorption information about Cu-BDC (copper terephthalate), it was synthesized by two different solvent separation procedures and identified using X-ray diffraction (XRD), Brunauer-Emmet-Telller (BET) and thermogravimetric analysis (TGA) techniques. Moreover, equilibrium adsorption measurements were performed for CH4 and CO2 gases in the pressure range 0-50 bar at two various temperatures (293 and 323 K), and experimental adsorption data were modeled with adsorption isotherms. Also, the sample synthesized by the new solvent separation procedure had 918 m2/gr surface area and 0.42 cm3/gr pore volume which were respectively 45% and 50% higher than the traditional method. In addition, this sample has shown CO2 and CH4 adsorption capacity (16.72 and 13.23 mmol gr-1) were desirable in comparison with other conventional Metal-Organic Frameworks (MOFs) and its methane adsorption value was close to DOE (Department of Energy) targets. To investigate the application of the synthesized materials, the selectivity of CO2/CH4 was determined by IAST (ideal adsorbed solution theory) according to the sorption test information of the single components. Finally, adsorption enthalpy of the adsorbates on the two samples was computed using the Clausius-Clapeyron equation and the results were in accordance with the isotherms at two various temperatures (293 and 323 K).https://jpst.ripi.ir/article_1080_731c83db8d2ff01bdc000083fd3c3740.pdfResearch Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701Experimental Data of Interfacial Tension and Contact Angle at Reservoir Condition: Influence of Tuned Water2029108110.22078/jpst.2020.4042.1645ENNiloKimCenter for Petroleum Studies (CEPETRO), Universidade Estadual de Campinas (UNICAMP), São Paulo, Brazil0000-0002-1948-6659AlessandraWinterCenter for Petroleum Studies (CEPETRO), Universidade Estadual de Campinas (UNICAMP), São Paulo, BrazilEuclidesBonetCenter for Petroleum Studies (CEPETRO), Universidade Estadual de Campinas (UNICAMP), São Paulo, BrazilGabrielBassaniRepsol Sinopec BrasilRafaelAlmeidaRepsol Sinopec BrasilJournal Article20200114Tuned water (brine with designed compositions) has proved to influence the oil recovery factor. One of the hypotheses supported to understand this technique involves decreasing the oil-water interfacial tension (IFT) and the rock’s wettability alteration, indicated by contact angle (CA) measurements. The literature lacks experimental data regarding the interfacial tension in oil-brine and contact angle in oil-brine-carbonate systems at reservoir conditions considering pressure and temperature, and reservoir rocks. The objective of this study is to obtain new data, at 5,000 psi and 63 °C, on brines with different concentrations. The experiments were carried out in three steps. First, the concentration of sodium chloride was varied 0, 0.25, 0.5, 0.75, and 1 times which is the quantity in a seawater sample. After identifying the best concentration of NaCl (75% of NaCl in original seawater), steps were taken to modify the amount of magnesium 0, 0.5, 1, 2, and 4 times, in the brine. Finally, the same proportions of sulfate were tested. The behavior of IFT and CA towards the function of these various concentrations was also investigated and discussed. Furthermore, the results reveal that the behavior of IFT was not predictable, as the salinity increases at times and decreases at others. This property probably depends more on the compounds in the brine than on the total salinity. Also, the images used to gauge the CA show a greater tendency toward water-wet conditions when the sulfate concentration decreases,and when the magnesium concentration decreases, the images present the opposite effect .https://jpst.ripi.ir/article_1081_36a16a2505369e0c922b6ea7a23a56d2.pdfResearch Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701Influence of Folding on Hydrocarbon Generation: an Example from the Dezful Embayment3038108210.22078/jpst.2020.4256.1692ENArsalanZeinalzadehDepartment of Geochemistry, Faculty of Geology, Research Institute of Petroleum Industry (RIPI), IranJournal Article20200809One dimensional basin modelling was used to evaluate the maturity of source rocks, the history of oil generation, and expulsion in north Pazanan syncline and Pazanan, Agha-Jari, and Bangestan anticlines in south Dezful Embayment in the Zagros Basin. The oil generation history of source rocks was obtained by using the basin modelling method. Burial history analysis shows an increase in the rate of burial after the Zagros folding, which it was contemporaneous with huge sedimentation. The high rate of burial is more noticeable in the Pazanan syncline, which it plays an important role in the generation of oil from source rocks. The Sargelu, Garau and Kazhdumi source rocks in the Pazanan syncline have reached the gas-maturity stage. Trapped gas in the Pazanan field could be sourced from the syncline.
https://jpst.ripi.ir/article_1082_818f4654ed39a1c147d1e51a00ffb4cb.pdfResearch Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701Petroleum geochemistry of the Albian-Turonian Sarvak reservoir in one of the oil fields of southwest Iran3952108410.22078/jpst.2020.4094.1662ENMiladZohrevandSchool of Geology, College of Science, University of Tehran, Tehran, IranAliShekarifardOil and Gas Engineering Group, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran\Institute of Petroleum Engineering (IPE), College of Engineering, University of Tehran, Tehran, IranVahidTavakoliSchool of Geology, College of Science, University of Tehran, Tehran, IranJournal Article20200302Organic geochemical investigations using thin layer chromatography-flame ionization detection (TLC-FID), Gas Chromatography (GC), Gas Chromatography-Mass Spectrometry (GC-MS), API gravimetry, elemental analysis, and isotope-ratio mass spectrometry (IR-MS) were carried out on eleven oil samples from the Sarvak reservoir in the Abadan Plain (SW Iran). Oil chemical composition, source, thermal maturity, age, lithology, and depositional environment of these oils’ source rock were determined in this study. Moreover, Sarvak oils are mainly naphthenic and paraffinic type. Their API degree between 16.2 and 20.14 and about 4.6% sulfur content indicate heavy and sulfur-rich oils. The results of the study of biomarkers, stable carbon isotope composition, trace elements, aromatic and sulfur content indicated that all oil samples are related to a marine-carbonate source rock with strongly anoxic conditions. The absence of oleanane in all oil samples, the variation of Pr/Ph versus δ13C of the whole oil, and C28/C29 steranes versus geological age proved that these oils had been produced earlier than the Late Cretaceous. Furthermore, the distribution of n-paraffins, calculation of Rc (%) from aromatic compounds, CPI (Carbon Preference Index) from gas chromatograms, and biomarker maturity indices indicated that the Sarvak oils are mature. Although the Sarvak oils are heavy, they show approximately maturity of peak oil-generative window, which represents a challenge in this study. It is guessed that the high sulfur content and low API gravity in the Sarvak reservoir oils are due to the presence of sulfur-rich organic matter (type IIS kerogen) in the source rock.https://jpst.ripi.ir/article_1084_9f36407ead0629fc166f14dde7970f68.pdfResearch Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701Using Hybrid Artificial Neural Network-Particle Swarm Optimization for Prediction of HIPS Mechanical Properties5366108310.22078/jpst.2020.4030.1641ENMediPakdelChemical Engineering Department, Islamic Azad University, Ilkhchi Branch, Ilkhchi, IranAlirezaBehroozsarandFaculty of Chemical Engineering, Urmia University of Technology, Urmia, IranJournal Article20191227Artificial neural networks (ANN) have emerged as a useful artificial intelligence concept in various engineering applications. Also, ANN only recently has been used in modeling the mechanical behavior of polymers. This study aims to show the applicability of ANNs, to predict and determine the mechanical properties of High Impact Polystyrene (HIPS). Moreover, Izod, Vicat, and MFI of pure HIPS were considered, and the effect of 25 different parameters on them investigated. By using ANN, a black-box model is considered as a calculator of mechanical properties. It is not easy to predict the accurate value of these properties without experimental works for two reasons: (1) the nonlinear behavior of the polymerization process and (2) the inaccuracy of experimental results of measurement of each of the properties. To overcome these problems, an alternative prediction model was proposed for calculating properties using a hybrid ANN-PSO model. All parameters in various cases have been gathered from the industrial DCS system and laboratory for the training of the ANN. First, by using the ANN model, the sensitivity analysis of parameters has been performed. It is then filtered using the effective ANN-PSO hybrid parameters. Out of 25 proposed parameters, 14, 10, 11 of them were selected in MFI, Izod, Vicat, respectively, and used to predict new parameters in the modified ANN. Ultimately, according to the obtained results, it was found that the hybrid ANN-PSO model was powerful in predicting properties with an average relative error of 6, 5, and 1% for predicting considered properties between industrial and computed ANN-PSO hybrid model data.https://jpst.ripi.ir/article_1083_e5e63da79fcd2bebbd7cb8bf1c1d0274.pdfResearch Institute of Petroleum Industry (RIPI)Journal of Petroleum Science and Technology2251-659X10320200701The Performance of Polymethyl Methacrylate/Clay Nanocomposite as Novel Pour Point Depressant on Rheological Properties of Model Waxy Crude Oil6774109510.22078/jpst.2020.4177.1675ENMohammad AliKazemiDepartment of Chemical Engineering, University of Isfahan, Isfahan, IranAli RezaSolaimany NazarDepartment of Chemical Engineering, University of Isfahan, Isfahan, IranYavarKarimiDepartment of Chemical Engineering, University of Isfahan, Isfahan, IranJournal Article20200520A novel polymeric nanocomposite pour point depressant (PPD), based on polymethyl methacrylate (PMMA) and montmorillonite (MMT) clay, was synthesized and characterized. For a comprehensive comparison, the influence of neat polymethyl methacrylate (PMMA) and PMMA/clay nanocomposite on reducing pour point, gelation point, apparent viscosity, and yield stress of a model waxy crude oil was investigated, followed by evaluation of their performances precisely. The rheometry test results showed that the addition of 400 ppm of PPMA and 800 ppm of PMMA/clay nanocomposite to waxy crude oil reduced the pour point from 13˚C (for untreated sample) to 0 and -3 ˚C, respectively. Thus, the addition of PMMA/clay nanocomposite to waxy crude oil resulted in a 120% reduction in the pour point.
https://jpst.ripi.ir/article_1095_d6723e7cd6735df68d1ce4c704c29a04.pdf