Sinopec â Shengli tested oil in an appraisal well in the Bohai Gulf Basin in February 2018. Chengbei-Xie 822, drilled in Chengdao field, shallow water zone in the Jiyang Depression. The well tested 416 b/d of oil in the Dongying Formation. This is the second well which achieved commercial oil flow in this areaÂ  after Chengbei 826 in earlier this year.  The success will add additional 36 MMbbl of oil in place reserve to the field.  The Chengdao field, located in shallow water zone of the Jiyang depression, was discovered in 1988 when Chengbei 12 tested oil and gas. The field has reservoir in the Tertiary, Mesozoic, Paleozoic and pre-Cambrian. Shallow water transition zone in the Bohai Gulf basin is an important exploration area for Sinopec â Shengli Company. In 1992, Chengdao field was on stream, the first offshore field operated by the company in shallow water area in the basin. By 2016 the field holds 440 million of oil in place and produced cumulative 52 million tons of oil.  The Chengdao field has its main reservoir in the Guantao and Dongying and Shahejie formations of the Tertiary, secondary reservoir in the Ordovician buried hill. In 2016 the field is produced at a rate of 70,000 b/d. 
Chengbei-Xie 822,op. by Sinopec â Shengli  in Chengbei block, The well tested 416 b/d of oil in the Dongying Formation. This is the second well which achieved commercial oil flow in this area  after Chengbei 826 in earlier this year.