Sergey K Sokhoshko is a PhD holder he defended his PhD thesis at the Tyumen State Oil and Gas University (Russian Federation). Currently he is a Professor of thernDepartment of Oil and Gas Fields Development and Production in the above mentioned university. He specializes in modeling of shallow horizontal wells and complexrnprofiles, as well as hydraulic fracturing issues
Statement of the Problem:Nowadays horizontal wells become more widespread day by day. At the same time a wellbore trajectoryrnin a productive formation can be quite complex (Fig. 1). In order to calculate total production rate of such a well or of its separaternintervals it is very important to know the fluid to the wellbore movement profile, flow rate increment along the wellbore as well asrnpressure drop along the wellbore with time in order to make a pressure build up curve. The objective of this study is to obtain arnsolution and to develop a technique which would allow calculation of the above operation parameters for unsteady state of complexrntrajectory oil wells.rn
Methodology & Theoretical Orientation:The point source method was used to simulate perforations in the wellbore of oil well inrnorder to calculate the complex trajectory well production rate. A solution for a fixed point source flow in an infinite formation withrnimpermeable top and bottom was obtained using a function of a non-fixed point source flow in an infinite formation and a methodrnof infinite imaging relative to the formation’s top and bottom. Local pressure losses and hydraulic resistances in the wellbore were alsorntaken into account as well as the changes in the modes of fluid movement in the wellbore.rn
Findings:Fluid movement to the wellbore profile, flow rate increment and wellbore pressure drop depend on the wellbore trajectory,rnproductive formation parameters, well operation time, which have to be taken into account both in well planning as well as in fieldrndevelopment design stages.rn
Conclusion & Significance:The designed technique allows to calculate in time the complex trajectory well productivity and itsrnseparate intervals, pressure drop in the wellbore, increment of the oil flow rate, as well as to calculate a theoretical pressure build uprncurve.
Ahmad Nikseresht is affiliated with Payame Noor University as a PhD student until May 2013. His thesis was conducted under the supervision of Prof M Bakavoli in the\r\nFerdowsi University. He commenced research in the field of Organic Chemistry involving carbohydrates, as a Gust PhD-student at the laboratory of Organic Chemistry of\r\nWageningen University. He was worked as a Gust PhD-student under the supervision of Prof. H Zuilh of and Tom Wennekes for a period of nine month. He is the Director\r\nof Department of Research and Entrepreneurship of Payame Noor University of Ilam, Iran. He has published more than 37 papers in reputed journals and international\r\nconferences in the field of organic chemistry.
The world is in great demand for energy, which is mainly fed by fossil fuels; there is a change in demand pattern that was similar in the past 50 years. In addition, for the past 3 years, the demand for energy from fossil fuels has been reduced as we are currently in the stage of the new energy world, called “The Grand Transition”. At this stage, demand for energy by consumers will not be reduced,but energy generation from sectors will be unprecedented as the energy produced from fossil fuels is reduced and the energy from renewable energy increases significantly. Biodiesel fuel has shown great promise as an alternative to petro-diesel fuel. Biodiesel is being vigorously pursued as a secure and clean energy source in the transition from the fossil fuel-based energy system to renewable energy for our global future. Traditionally, biodiesel production was carried out under homogeneous conditions in the presence of bases or an acid catalyst such as sulfuric acid and sodium hydroxide. These homogeneous systems have numerous drawbacks such as corrosion of reactors, difficult recovery of catalyst and environmental pollution. In recent years, metal organic frameworks (MOFs) have become of growing interest due to their unique chemical and physical properties such as controllable composition, large surface area, thermal stability, flexibility and easy preparation. MOFs are a new class of nanoporous inorganic–organic hybrid materials that as well as extending potential applications such as catalysis, separation, gas storage, carbon dioxide capture. According to the inimitable advantages, MOFs can be used as a powerful heterogeneous catalyst or an appropriate catalyst carrier. In this work, esterification of oleic acid by methanol is achieved with high yields under ultrasonic irradiation. Factorial design evidenced a positive effect of reaction time amount of catalyst and molar ratio of oleic acid to methanol. This reaction performed with a novel heterogeneous\r\ncatalyst that fabricated by 12-molybdophosphoric acid (PMA) and Fe (III) -based MOF, namely MIL-53 (Fe). Syntheses of MIL-53 and encapsulation process carry out by ultrasound irradiation at ambient temperature and atmospheric pressure. The prepared composite was characterized by various techniques such as XRD, FT-IR, SEM, BET and ICP that demonstrate excellent catalytic activities, while being highly convenient to synthesize. The obtained results were revealed that ultrasound irradiation could be used for the appropriate and rapid biodiesel production.