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Transform of Downhole's Information to Acoustic Signals in Smart Drilling
, M.Sc. Thesis Sharif University of Technology ; Ahmadian, Mohammad Taghi (Supervisor) ; Manzuri, Mohammad Taghi (Supervisor)
Abstract
Drilling in oil industry, is an expensive process in produce and extract oil from well. Any mistake in drilling may cause many drawbacks for industry owners. Phisic’s quantities information at downhole like tempreture, pressure and force on bit synchronously can inform user from torrid conditions and prevent undesired events by actions like evoke bit from downhole or change at rotation velocity in drilling and finally stop operations. With attention to a lot of problems in data transport from long distance more than one kilometer from downhole, scientists believe that one of the methods to do this process is converting data gathered at the bottom hole to acoustic waves and transmit them to...
Petroleum Production Design for Intelligent Wells to Produce From Several Oil Layers Using Single Tubing
, M.Sc. Thesis Sharif University of Technology ; Pishvaie, Mahmoud Reza (Supervisor) ; Aminshahidy, Babak (Supervisor)
Abstract
The development of an oil field plays an important role in the optimum production. In the past, several wells have been used in a multi layer reservoir to produce oil from each layer. It costs oil industry billions of dollars and the problem would be more severe in the offshore. Nowadays, one well can produce oil from different pay zones in a reservoir. In this type of well called smart or intelligent well, production tubing is in common between pay zones and some chokes are installed on the tubing to produce oil from different layers. The size of choke usually varies and can be controlled by an electrical system installed in the well. As each pay interval has different capacity in terms of...
Optimization of Valve Setting in Smart Wells Using Multi-Segment Well Model
,
M.Sc. Thesis
Sharif University of Technology
;
Massihi, Mohsen
(Supervisor)
;
Pishvaie, Mahmoud Reza
(Supervisor)
Abstract
Smart wellsareunconventional wells with down-hole devices installed on their production tubing. Such wells allow us to continuouslymonitor flow rates, pressures, temperature and periodically adjust down-holevalves setting without any production intervention. This makes smart well technology to be considered as one of the most significantbreakthroughs in reservoir management technologies. So, modeling and simulating smart wellsautomated action represents a challenge in forecastingtheir performances.One of the easiest ways to model such wells is to transform theminto a multi-segment well with the ability tocontrol each segment independently. By using the commercial reservoir simulator,...
Real time optimization of a natural gas lift system with a differential evaluation method
, Article Energy Sources, Part A: Recovery, Utilization and Environmental Effects ; Vol. 36, issue. 3 , 2014 , pp. 309-322 ; ISSN: 15567036 ; Pishvaie, M. R ; Aminshahidy, B ; Sharif University of Technology
Abstract
This article presents a method for optimizing and controlling an oil production system using a natural gas lift concept. Ever increasing development of Smart Well technology and various applications of down-hole monitoring and controlling instruments along with new methods of data acquisition/transmission make it possible for the natural gas lift system to be controlled and optimized more effectively and faster than before. With this technology it is possible to monitor the down-hole conditions of gas and oil zones and to control the inflow valves in gas and oil zones. In this work, a proportional integral differential feedback controller has been used to smartly control the entrance of gas...
Mechanical strength improvement of mud motor’s elastomer by nano clay and prediction the working life via strain energy
, Article International Journal of Engineering, Transactions B: Applications ; Volume 32, Issue 2 , 2019 , Pages 184-191 ; 1728144X (ISSN) ; Tabatabaee Ghomi, M ; Pircheraghi, G ; Sharif University of Technology
Materials and Energy Research Center
2019
Abstract
In directional drilling, the most important thing that leads to pulling out the drill string is end of mud motor working life. Considering the working conditions of down hole mud motors; increasing the mechanical properties of their stator’s elastomer is crucial. Some attempts were done to increase the motor performance through geometrical changes but lack of material improvement is significant in previous studies. In this study, NBR/nanoclay composite samples were prepared through melt intercalation in an internal mixer and tested with regard to the temperature and drilling mud of down hole. Hardness, tear, fatigue and tensile test results of neat NBR elastomer and nanocomposite of NBR and...
Application of temperature transient analysis for welltest interpretation and well productivity evaluation
, Article Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition, Jakarta, Indonesia,October 30–November 1, 2007 ; 2007 ; 9781613990407 (ISBN) ; Siavoshi, J ; Sharif University of Technology
2007
Abstract
During transient tests, both pressure and temperature are changed depending on downhole flow rate. In gas producing wells, Joule-Thomson cooling and frictional heating effects are the main dynamic factors causing flowing bottomhole temperature to differ from the static formation temperature at that depth. When a gas well is shut in, JT cooling effect is vanished and this causes a sharp increase in sandface temperature. As effect of wellbore storage ends, wellbore temperature gradually cools down due to heat conduction with near wellbore region. This paper demonstrates a new technique for using temperature transient data in gas wells in order to determine end of wellbore storage. Also, effect...