Zhuanghai 25d flow tested approximately 1,299 bo/d and 1.1 MMcfg/d (0% water and less than 0.01% sand) through a 10mm choke from the Oligocene Dongying Formation on 26 June 2020. The test flow rate is the highest that Sinopec has achieved from the deeper Paleogene interval in the Zhuanghai fault zone, Bohai Gulf Basin. Zhuanghai 25d was spudded on or around 5 April 2020 using the âShengli 7â jack-up. The oil and gas exploration well was targeting the Guantao and Dongying formations. Zhuanghai 25d is in the Sinopec operated Binhai Block in the offshore Bohai Gulf Basin. 
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