Abstract: Utilizing Produced Water for pressure support is one common practice in the Oil industry. However, handling the increasing rates is becoming a major concern. Produced Water re-injection systems consume a huge percentage of overall upstream production facilities power requirements. Typically such systems are designed with some reservoir performance uncertainties and production demand. This fact encourages designers and operators to oversize the system to be in the safe side and guarantee that the system is adequate. However, this approach comes on the expense of system efficiency of only 20-30%. A new approach to effectively analyse produced water Re-injection systems and evaluate alternatives to significantly improve their efficiencies and guarantees adequacy is badly needed more than ever. The approach must evaluate the whole system from the suction of the re-injection pumps to the bottom of the disposal wells of multiple facilities simultaneously. The methodology should address reservoir pressure, headers and laterals, pumps configuration and drive mechanism in details. In addition, this approach should address both short and long term optimization needs. A new set of tools and mindset was successfully implemented and resulted in 100s of giga watts of saved power and the overall system efficiency was improved to 70-80%. This experience can be adopted by many other operators and we could avoid the need of many large power generation projects. Biography: Al-Khalifa graduated from the King Fahd University of Petroleum and Minerals in 1996 with a BS in mechanical engineering. He joined Saudi Aramco in December 1997. Al- Khalifa joined the South Ghawar Engineering Unit in 1998 as a process engineer. Currently, Al-Khalifa is Senior Process Engineer and a group leader at North Ghawar Producing Department. Al-Khalifa issued several technical papers and presentations on Produced Water Re-injection System optimization. Al-Khalifa, has been active member of the Society of Petroleum Engineers (SPE) and co-chaired several Applied Technologies Workshops. He contributed to establishing the 1st Young Professionals section at the Middle East. Al-Khalifa served as a member with the Projects, Facilities and Construction Subcommittee of Annual Technical Conference and Exhibition in 2007, 2008 and 2009 Registration Register online or bookings for presentation and social are pre-pay only and must be made to following account: Account Name: Society of Petroleum Engineers Bank Name: St. George Bank Ltd BSB Number: 112-879 Account Number: 039670546 Reference: “Your Full Name- Member #” RSVP: Izaz-ul Haque by 30th May 2014. (Please add DL Khalifa in the email subject title) izaz-ul.haque@oilsearch.com