Sinopec â Henan made successful appraisal drilling in the Nanxiang Basin. Two deep pool exploration wells, with objective to test a deep reservoir in a litho-stratigraphic play, are drilled in Gucheng field in the Biyang Depression, Bi 123-7 tested 82 b/d of oil and Bi 123-6 penetrated new reservoir unit. It is estimated the success can add 3 MMbbl of oil in place to the field.Â  Â   Gucheng field is an aging field with 190 MMbbl of oil in place in the Oligocene Hetaoyuan 3 Formation.Â  The field produced at a rate of 1,400 b/d of oil in 2017 and has produced cumulative of 23 MMbbl of oil.  Exploration in the Nanxiang Basin was started in 1971 and a total of 23 fields/discoveries have been found with 300 MMt of oil and 10 Bcm of gas in-place proven reserves by the end of 2017.   A total of 14 fields had been put on stream and annual production was 1 MMt of oil and 25 MMcm of gas in 2017. Â   Although exploration reached mature in the Biyang and Nanyang depressions, exploration potential still exists, especially in the deep plays and unconventional tight oil.
Sinopec â Henan made successful appraisal drilling in the Nanxiang Basin. Two deep pool exploration wells, with objective to test a deep reservoir in a litho-stratigraphic play, are drilled in Gucheng field in the Biyang Depression, Bi 123-7 tested 82 b/d of oil and Bi 123-6 penetrated new reservoir unit. It is estimated the success can add 3 MMbbl of oil in place to the field.    