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Petroleum Science 2016年第1期13卷 155-166页

作者： taraneh jafari behbahani Research Institute of Petroleum Industry (RIPI) P.O.Box 14665-1998 Tehran Iran

A powerful method is necessary for thermodynamic modeling of wax phase behavior in crude oils,such as the perturbed-chain statistical associating fluid theory（PC-SAFT）.In this work,a new approach based on the wax appearance temperature of crude oil was proposed to estimate PC-SAFT parameters in thermodynamic modeling of wax precipitation from crude *** proposed approach was verified using experimental data obtained in this work and also with those reported in the *** order to compare the performance of the PC-SAFT model with previous models,the wax precipitation experimental data were correlated using previous models such as the solid solution model and multi-solid phase *** results showed that the PC-SAFT model can correlate more accurately the wax precipitation experimental data of crude oil than the previous models,with an absolute average deviation less than 0.4 %.Also,a series of dynamic experiments were carried out to determine the rheological behavior of waxy crude oil in the absence and presence of a flow improver such as ethylene–vinyl acetate *** was found that the apparent viscosity of waxy crude oil decreased with increasing shear ***,the results showed that the performance of flow improver was dependent on its molecular weight.

关键词： crude deviation thermodynamic viscosity copolymer appearance rheological hydrocarbons verified powerful

Development of minimum tie line length method for determination of minimum miscible pressure in gas injection process

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Petroleum Research 2019年第2期4卷 173-180页

作者： Ehsan Zareie shirazani taraneh jafari behbahani Research Institute of Petroleum Industry(RIPI) TehranIran Islamic Azad University Central Tehran BranchTehranIran

Gas injection process is a very important technology in enhanced oil *** miscible pressure is one of the key parameters in gas injection *** experimental methods such as slim tube are used to measure *** methods are costly and time *** computational methods are used in order to achieve a cost-effective and reliable technique to evaluate *** this work,a new methodology has been proposed for determination of MMP using the minimum tie line length method.A real mixing cell model was developed to estimate the MMP,MME and key tie *** method is simple,robust,and faster than conventional one-dimensional simulation of slim *** new mixing cells method can accurately determine the whole key tie lines to a shift,regardless of the number of injection gas and reservoir fluid *** other methods of mixing cells,this method automatically corrects dispersion by additional contacts to achieve the low variation domain of tie line ***,the determination and implementation of the minimum miscibility enrichment are investigated.

关键词： Minimum miscible pressure Minimum miscibility enrichment Multiple mixing cells method Enhanced oil recovery Minimum tie line length method

Experimental and modeling study on the effect of molecular diffusion during CO_(2) injection

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Petroleum Research 2021年第2期6卷 178-186页

作者： Vahid Moayedi Esfahani taraneh jafari behbahani Seyyed Jamalodin Sheikh Zakariayi Mahnaz Hekmat Zadeh Islamic Azad University Science and Research BranchIran Research Institute of Petroleum Industry(RIPI) P.O.Box 14665-1998TehranIran

In this work,a new approach based on the effect of molecular diffusion on oil recovery during CO_(2)injection in naturally fractured reservoirs has been proposed to examine the best condition for oil recovery in the matrix block.A homogeneous matrix block from one of Iran’s naturally fractured reservoirs has been *** matrix block is filled with oil and connate water surrounded by fractures filled with injection gas from the top,bottom and right *** which matrix block oil saturation and behavior of matrix block from inside for specific time are examined *** analyses on the matrix block at different saturation pressures showed first the positive effect of increasing saturation pressure could be seen when diffusion was ***,as the pressure increased,the side of recovery changed from the top to the bottom just absolutely more effective when we had diffusion in the ***,gravity drainage at lower saturation pressures was dominant for 2 cases with and without diffusion and at higher saturation pressures capillary force becomes more involved.

关键词： CO_(2)injection Molecular diffusion EOS Matrix block Sensitivity analysis

Investigation of wax precipitation in crude oil:Experimental and modeling

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Petroleum 2015年第3期1卷 223-230页

作者： taraneh jafari behbahani Ali Akbar Miran Beigi Zahra Taheri Bahram Ghanbari Research Institute of Petroleum Industry(RIPI) P.O.Box 14665-1998TehranIran

In this work,a series of experiments were carried to investigation of rheological behavior of crude oil using waxy crude oil sample in the absence/presence of flow improver such as ethylene-vinyl acetate *** rheological data covered the temperature range of 5e30*** results indicated that the performance of flow improver was dependent on its molecular *** of small quantities of flow improver,can improve viscosity and pour point of crude ***,an Artificial Neural Network(ANN)model using Multi-Layer Perceptron(MLP)topology has been developed to account wax appearance temperature and the amount of precipitated wax and the model was verified using experimental data given in this work and reported in the *** order to compare the performance of the proposed model based on Artificial Neural Network,the wax precipitation experimental data at different temperatures were predicted using solid solution model and multi-solid phase *** results showed that the developed model based on Artificial Neural Network can predict more accurately the wax precipitation experimental data in comparison to the previous models such as solid solution and multi-solid phase model with AADs less than 0.5%.Furthermore,the number of parameters required for the Artificial Neural Network(ANN)model is less than the studied thermodynamic models.

关键词： Wax precipitation Artificial neural network Solid solution model Multi-solid phase model

The Study of Area-Concentration Fractal Method in Litho-Geochemical Data in Tanurjeh Area, Khorasan Province

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Open Journal of Geology 2015年第6期5卷 451-457页

作者： Kimya Ajayebi Hamidreza jafari Behzad behbahani Department of Geology Islamic Azad University Karaj Branch Karaj Iran Islamic Azad University Sirjan Branch Kerman Iran Islamic Azad University North Tehran Branch Tehran Iran

Given the scientific progresses as well as the invention of new methods in exploration, it is necessary to conduct some re-investigations in several exploration zones. So, in the present research, geochemical data on Tanurjeh exploration zone, (located in Northern Neishaboor, Khorasane Razavi province) is studied by using some modern statistical methods. Fractal methods are appropriated to study and separate the grades societies in deposits. In this article, litho-geochemical analysis results (ICP) are processed by concentration area fractal method (CA). The distribution diagrams related to the statistical populations are drawn, and anomaly populations of Copper, Gold and Molybdenum are determined besides previous studies (petrography and alteration), the results of statistic methods (CA) and aid presence of the porphyry system in depth.

关键词： Concentration Fractal Method Litho-Geochemical Data Tanurjeh Area

Analysis of positive feedback in the control of movement

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Journal of Biomedical Science and Engineering 2009年第7期2卷 480-483页

作者： Soroor behbahani Amir Homayoun jafari 不详

Over the past three decades, neurophysiologists studying the neural circuitry responsible for control of skeletal muscles have developed several different general theories of sensorimotor control. These have usually invoked one or more of the sources of proprioceptive signals (e.g. muscle spindle and Golgi tendon organ afferents) in positive or negative feed-back loops to the homonymous alpha motoneurones. In this paper we consider to analyze the role of posi-tive feedback in combination of negative feedback due to important role of them in stabilizing the neu-romuscular system.

关键词： Positive Feedback Negative Feedback Hill Model Reflex Model