Gas Lift Design Using PROSPER Software

One of the most important production issues in the oil field is high water production, which may lead to wells a reduction in an economic period. The increment of water production or decrease of reservoir pressure causes a decline in the oil production rate or kills the well. An artificial lift technique should be implemented to return the wells back to production. A continuous gas lift system is the best method . In this study, the offshore well C-1 located in a Field in Libya revived production by utilizing the gas lift technique to achieve incremental reserve recovery after the well was shut in due to a significant increase in water production, which reached 50% and the well died. In this paper, Nodal Analysis has been carried out utilizing the PROSPER Software for well performance evaluation, Gas lift design and optimisation. The effect of valve spacing on the gas lift optimization and gas injection rate depth of gas injection was studied by performing a sensitivity analysis. The results show that a constant gas injection of 3.9199 MMscf/day with an injection pressure of 1700 psi can deliver 3866.41 bbl/day of oil and valve spacing information at various depths, the maximum depth is at 10,000 feet.; This was achieved by changing the depth of injection for three different cases to ascertain the effect on the liquid production rate.