document: CFD 7-5-1 completed on 21 July 2020 without result reported.  CNOOC â Tianjin spudded a new-field wildcat CFD 7-5-1 in Bohai offshore, Bohai Gulf Basin on 5 July 2020. The well is located in Boxi Block in the western part of the Bohai Gulf, in a water depth of approximately 20 m. The well is targeting the Mio-Oligocene clastic play. âBohai 5â J/U is used for the drilling operation.   There have been several wells drilled in this area before 2010, such as CFD 7-1/2/3 and CFD 8-1/2, all wells are dry. However no well drilled in this area for the last ten years.   There is a small field found in this area. CFD 1-6, with reservoir in pre-Tertiary fractured granite basement. But the field was shut down after less than one year production in 1995, because it failed to yield sustainable production due to the limitations of the fracture reservoir system.   In greater CFD area, there is CFD oil fields complex, which is comprised of CFD11-1, 11-2, 11-3/5, 11-6/12-1 and 12-1S fields. The main oil accumulation of the CFD fields cluster is in the Neogene Lower Minghuazhen and Guantao formations from top to bottom. The oil is moderately heavy to medium oil type. The traps are draping anticlines developed on basement highs.  Bohai offshore is the important production base for CNOOC. After nearly 40 years exploration and production the company has found more than 70 fields with approved about 4 bn tons of oil in place by 2019.
summary: (Bohai Gulf b.), Caofeidian 7-5-1 new-field wildcat was completed without result reported. The well is located in Boxi Block operated by CNOOC LTD (100%) in the western part of the Bohai Gulf, in a water depth of approximately 20 m. The well is targeting the Mio-Oligocene clastic play.