Multiphase flowmeter optimizes heavy oil production off Congo

A multiphase meter used for testing wells producing heavy oil led to increased production and improved the understanding of reservoirs in the Yombo field, off Congo (Brazzaville).A unit of Perenco SA operates the field that produces an average 17° gravity oil with a 2,200 cp viscosity at 80° F.Well testing of heavy oil production is complex because most conventional surface testing equipment provides unreliable measurements. This unreliability derives from test-vessel instability (low GOR), foaming, or fluid separation problems.Well tests in the off-Congo field before use of multiphase meters overestimated oil production by more than 25% even when total liquid flow rate was more o...

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