شهریار عصفوری

Esfand oil field is one of the Persian Gulf oil fields which is composed of two reservoirs A and B. Production from reservoir A initiated with 15 producing wells. Also To maintain reservoir pressure 13 water injection wells has been drilled. Due to increasing water cut, oil production in some wells in the reservoir has fallen sharply. Continued increase in water cut, make it essential to use artificial lift system in the future. In this thesis various methods of artificial lift are investigated and compared and techniques which are used in Iran have been evaluated. These artificial lift methods include continuous and intermittent gas lift, electrical submersible pumps, progressive cavity pumps, hydraulic pump, roto-dynamic pumps, positive displacement pumps, sucker rod pump, coiled tubing, pig lift, Plunger lift and diluent injection. Also comprehensive information about studied field is provided. According to these information and given reasons electrical submersible pump is chosen as the best artificial lift method for increasing the production of the field. After expressing the relationships and methods used in the simulation of a producing well and ESP pumps, one of the wells is simulated and ESP installation has been evaluated in that well. According to the survey conducted the most suitable place to install pump and electrical motor is the end of tubing and to reach to the rate of 5000 STB/day which is equivalent to the initial rate of the well, WOODGROUP-TJ12000 pump, ODI 70KM300-E electrical motor and copper cable with AWG number of 1 have the most efficiency and are selected as the suitable industrial equipments in this well. For increasing cable lifetime, using EPDM as the primary insulation jacket and nitrile rubber as the secondary insulation jacket are recommended. Finally, the stability of the selected equipment to changes in well’s conditions have been investigated and approved.