Mohsen Mehraki - Islamic Azad University of Firooz Abad
Mohammad Afkhami Garaei - Islamic Azad University of Firooz Abad
Babak Moradi - Iranian Central Oil Fields Co
Abdolnabi Hashemi - Petroleum University of Technology, Ahvaz, Iran

The excessive and unwanted production water is one problem of oil reservoir with water drive. having a channel between water zone and reservoir and water penetration in higher permeability zone, leads to a massive amount of water under reservoir pressure enters the well with coning shape and it is produced with oil. Pressure drawdown is one of the main reason of water and gas coning. This pressure drawdown brings about water cresting in water oil contact in adjacent to horizontal wells. Water coning volume in horizontal wells is greater than vertical wells and water cut after breakthrough will increase extremely. At the heel of the horizontal wells, the pressure drawdown is more than the toe, so at the heel water cone quickly enters the well. In this paper recommendation method for water cresting control is dual completion to symmetric pressure distribution in welbore. TWS and BWS are two latest technique of horizontal wells completion in order to produce gas and water spreading. The result of simulation reveal that using these two technique decrease the water cut to 11% and increase 120mbbl of ultimate oil production and 3% recovery factor.

water cresting, pressure drawdown, breakthrough, dual completion