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- W2015586369 abstract "Abstract A Southern California oil producer needed to expand its light oil waterflood. An existing oil treating plant was expanded to include a new state-of-the-art water plant to recycle all produced water associated with light oil production for use in the existing waterflood. The new 350,000-barrel-per-day water plant was designed to treat the produced water to remove suspended solids and oil to a specification that equaled or exceeded the existing waterflood aquifer source. In addition, the plant had to minimize waste while maximizing treated water output and be built for a 40-year life. The plant addition was designed and constructed using a unique combination of water de-oiling, desanding, and filtration equipment together with centrifuges and gas flotation equipment similar to equipment used in municipal wastewater treatment plants. All wastes such as filter backwash are processed and reused. The water plant is now operational, performing at or above expectations. It treats and recycles more than 340,000 barrels of water per day for use in the field's waterflood project. This recycling has largely displaced the existing waterflood source supply system (saving power and well maintenance and replacement costs) and reduced produced water disposal well injection costs resulting from much improved water quality. The new plant has met its goal of providing a high-quality water source for waterflood with typically less than 2 milligrams per liter of solids, oil, and grease. Background In 1997, Shell and Mobil (now ExxonMobil) combined their California upstream operations in a company called Aera Energy LLC (Aera). With this enterprise, Aera became the largest oil and gas producer in the Belridge Field. This large field is located in west Kern County in Southern California. Aera produces heavy oil (12° API) from the Tulare formation and light oil (28 to 30° API) from the Diatomite formation. The majority of the Diatomite production is enhanced by a field wide waterflood program. In 1998, Aera converted one of its heavy oil treating plants, Dehy 20 (D20), to process the field's entire light oil production stream. The remodeled plant was commissioned in early 1999, processing about 120,000 barrels of fluid. The project was a complete success meeting all expectations: it was easy to operate, cost effective to run, and met both oil and water treating specifications. Belridge Field Waterflood Development and the D20 Facility Aera continued to expand Diatomite production and waterflood after 1998. By the middle of 2004, gross production into the plant was averaging about 375,000 barrels per day (B/D). Note the gross production trend shown in Fig. 1. The increasing production meant more water disposal. The surface water disposal system was approaching capacity. Subsurface disposal was available for a portion of the water but would not be enough for the entire volume. Aera decided to investigate what it would take to recycle the produced water from the D20 facility for use in the field's Diatomite waterflood. Aera formed an engineering task force to determine if the D20 facility could produce water with a quality that would be suitable for the Diatomite waterflood. Similar waterflood facilities in the area were examined, and the task force determined that the D20 facility could indeed provide a suitable water quality. However, the plant would have to be substantially modified and a number of important issues would have to be addressed in an upgrade project." @default.
- W2015586369 created "2016-06-24" @default.
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- W2015586369 date "2008-09-21" @default.
- W2015586369 modified "2023-09-25" @default.
- W2015586369 title "Dehy 20 Water Filtration Plant: A Closed-Loop Water-Treating Facility" @default.
- W2015586369 doi "https://doi.org/10.2118/116157-ms" @default.
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