PRODUCTIVITY INDEX IN HORIZONTAL WELL

The work in this project studied the productivity index of horizontal wells in the Mabruk (west Mabruk) oil field. Different aspects of horizontal wells were reviewed; including drilling and completion technologies, limitations and applications. Different method were used to calculate productivity index under steady state (e.g ,Borisov's ,Joshi's ,Giger and Renard and Dupuy ,methods) and pseudo steady state conditions (e.g. the Mutalik et al , Babu and Odeh , Kuchuk et al methods) of the horizontal well were also reviewed. The factors effect pressure drops between the reservoir and the wellbore such as well length, permeability, reservoir thickness, drainage area, fluid viscosity, and perforation percentage. Horizontal drilling has been used successfully to Increase the productivity of reservoirs; many formulas can be used to compute the productivity of horizontal compared to vertical ones. The objectives of this work are to identify the different flow regimes in Horizontal Wells and reservoir parameters that are required to calculate the Productivity Index and to compare the Productivity between the different methods in Horizontal Wells.