Results have confirmed a mid-sized oil field.
Caofeidian 6-4 is in the western part of the Shijutuo Uplift in an average water depth of around 20 m (65.6 ft). The Caofeidian 6-4-1 discovery well, drilled and completed at a depth of 3,100 m (10,170 ft), encountered oil pay zones with a total thickness of roughly 180 m (590 ft).
The well produces light crude oil. On test it flowed around 5,750 b/d.
CNOOC added that the program established three records in the west of Bohai exploration area, achieving maximum cumulative thickness and maximum single pay thickness of oil pay zones, and the highest test production to date in Paleogene clastic rocks.
Results should also provide guidance for oil and gas exploration in similar areas, the company suggested.
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