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Effect of alumina and silica nanocomposite based on polyacrylamide on light and heavy oil recovery in presence of formation water using micromodel

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Petroleum 2024年第2期10卷 338-353页

作者： Ashkan Maleki Behnam Sedaee Alireza Bahramian Sajjad Gharechelou nahid Sarlak Arash Mehdizad Mohammad reza Rasaei Aliakbar dehghan Science and Research Branch Islamic Azad University Institute of Petroleum Engineering School of Chemical Engineering University of Tehran School of Geology College of Science University of Tehran Department of Chemistry Lorestan University Iranian Offshore Oil Company

Increasing world request for energy has made oil extraction from reservoirs more desirable. Many novel EOR methods have been proposed and utilized for this purpose. Using nanocomposites in chemical flooding is one of these novel methods. In this study, we investigated the impact of six injection solutions on the recovery of light and heavy oil with the presence of two different brines as formation water using a homogenous glass micromodel. All of the injection solutions were based on a 40,000 ppm Na Cl synthetic seawater(SSW), one of which was additive free and the others were prepared by dispersing nanocomposite silica-based polyacrylamide(NCSP), nanocomposite alumina-based polyacrylamide(NCAP), the combination of both nanocomposites silica and alumina based on polyacrylamide(NCSAP),surfactant(CTAB) and polyacrylamide(PAM) with a concentration of 1000 ppm as additives. The Stability of nanocomposites was tested against the salinity of the brine and temperature using salinity and DSC tests which were successful. Alongside stability tests, IFT, contact angle and oil recovery measurements were made. Visual results revealed that in addition to the effect of silica and alumina nanocomposite in reducing interfacial tension and wettability alteration, control of mobility ratio caused a major improvement in sweeping efficiency and oil recovery. According to the sweeping behavior of injected fluids, it was found that the main effect of surfactant was wettability alteration, for polyacrylamide was mobility control and for nanocomposites was the reduction of interfacial tension between oil and injected fluid, which was completely analyzed and checked out. Also, NCSAP with 95.83% and 70.33% and CTAB with 84.35% and 91% have the highest light oil recoveries at 250,000 ppm and 180,000 ppm salinity, respectively which is related to the superposition effect of interactions between nanocomposites, solution and oil. Based on our results it can be concluded that the most effective me

关键词： Enhanced oil recovery Micromodel Polyacrylamide Nanocomposite Salinity Alumina and silica nanoparticles

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Investigating the Relationship Between Emotional Intelligence and Personality Types Among Nursing Candidates in Ardebil University, in Iran

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Journal of Sociology Study 2014年第6期4卷 531-537页

作者： Sohrab Yaghoubi Namin nahid dehghan nayeri Farhad Jomehri lslamic Azad University Kish International Branch Iran Tehran University of Medical Sciences lran

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Structural parameters improvement of an integrated HBT in a cascode configuration opto-electronic mixer

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Journal of Semiconductors 2013年第9期34卷 35-40页

作者： Hassan Kaatuzian Hadi dehghan nayeri Masoud Ataei Ashkan Zandi Photonics Research Laboratory(PRL) Electrical Engineering Department AmirKabir University of Technology

We analyze an integrated electrically pumped opto-electronic mixer, which consists of two InP/GalnAs hetero junction bipolar transistors （HBT）, in a cascode configuration. A new HBT with modified physical structure is proposed and simulated to improve the frequency characteristics of a cascode mixer. For the verification and calibrating software simulator, we compare the simulation results of a typical HBT, before modifying it and com paring it with empirical reported experiments. Then we examine the simulator on our modified proposed HBT to prove its wider frequency characteristics with better flatness and acceptable down conversion gain. Although the idea is examined in several GHz modulation, it may easily be extended to state of the art HBT cascode mixers in much higher frequency range.

关键词： cascode down conversion gain mixer opto-electronic photo HBT simulation

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The Crystallization and Physical Properties of Al-doped ZnO Films

The Crystallization and Physical Properties of Al-doped ZnO ...

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2011 2nd International Conference on Nanotechnology and Biosensors（ICNB 2011）

作者： Seyed manouchehr Hosseini Pilangorgi Fatemeh dehghan nayeri Ebrahim Asl-Soleimani Department of electrical engineering Toyserkan BranchIslamic Azad UniversityToyserkanIran Thin Film laboratory ECE departmentUniversity of TehranTehranIran

In this paper, Al-doped ZnO (AZO) films have been deposited by RF sputtering at room temperature with thickness 300 nm from an Aluminium Zinc Oxide target in Argon 99.99% ambient and without substrate heating with RF power of 300 watt. After deposition, the samples have been annealed at temperatures ranging from 300 to 500 o C in vacuum for 1h. The effect of flow rate of the Argon gas and annealing, on the Structural properties and grain size have been investigated by XRD using Cu(Ka1) radiation (λ= 0.154056 nm) in θ-2θ scan mode. It is shown that the structural properties and grain size of the AZO thin films are dependent on the flow rate of the Argon gas. The experimental results show that good qualities of crystalline structure appeared when AZO film prepared by flow rate of Argon gas 10 SCCM. But the effect of annealing on the structural properties of the AZO thin films is low. A high degree of preferred orientation which depends on the various flow rate of argon gas is exhibited. The θ-2θ scan data of AZO films exhibit a strong 2θ peaks at nearby 34.53°, corresponding to the (002) peaks of AZO. It is indicated that the film is a crystalline with a preferential orientation along c-axis. There is a 2% variation in 2θ peaks of AZO films. (i.e. 34.53°± 2%) have been prepared at various flow rate and annealing temperature.

关键词： AZO sputtering annealing thin film ZnO

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