Pul-A field is an oil producing field located about 260 km offshore Terengganu, eastern Peninsular Malaysia in a water depth of about 77 meter in the South China Sea (Refer to Figure 1). The field is equipped with oil and gas processing plant, gas injection facilities and gas compression system. Pul-A was brought to production in March 1978 with an average oil production of 1,400 barrels oil per day (BOPD). The oil production peaked at around 35,000 BOPD in 1979. Previously produced water was treated using a corrugated plate interceptor (CPI) unit prior to discharge. The water treatment is required to ensure the effluent water quality is in compliance with regulatory effluent discharged water requirement of maximum oil content of 40 parts per million (ppm). The CPI unit was down several times in 2005 and 2006 causing twenty daysproduction deferment with an estimated opportunity loss of USD 6.8 Million. In line with the effort to maintain the oil production by flowing high water cut wells, a new produced water treatment technology was chosen to replace the existing CPI unit. The new equipment is a vertical separator that is equipped with acombination of induced gas and cyclonic fluid motion to improve solids, water and oil separation. Pul-A team successfully installed the new equipment with challenging modifications and tie-in work in aging facilities. The unit that was commissioned in October 2010is capable of treating produced water up to 15,000 barrel water per day (BWPD).

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