CNOOC â Zhanjiang made a gas discovery at YL 8-3-1, the well is reported to test over 35 MMcf/d of gas from basement in October 2019.     CNOOC â Zhanjiang spudded YL 8-3-1, a deep water NFW, in the Qiongdongnan Basin on 17 July 2019. The well is located in the east of Lingshui Sag in 1,830 m of water and has a PTD of 3,015 m with target in Miocene-Oligocene clastic play. âBlue Whale 1â S/S is used for the drilling operation.     In 2018 CNOOC completed YL 8-1-1, north of YL 8-3-1, and the well penetrated gas pay in the Oligocene Yacheng and granite basement formations. But the discovery is small in size without commercial value. Following YL 8-1-1, CNOOC drilled two NFW wells, YL 3-1 and YL 13-1-1, in this area without success.    In 2015 CNOOC drilled LS 18-2-1 (alternatively YL 7-1-1), west to YL 8-3-1, and the well is reported with gas discovery.     In 2011, BG drilled YL 2-1-1, further north to this well in this area, without success.     Background Information    CNOOC has achieved several gas discoveries in deep water Qiongdongnan Basin.   In early 2014, CNOOC made first deep water gas discovery of Lingshui 17-2 in the Qiongdongnan Basin. Lingshui 17-2-1 tested 56 MMscfg/d and 490 b/d of condensate at an interval 3,321 - 3,351 m from the Huangliu Formation of the Upper Miocene. The following five appraisal wells were all successful and the discovery booked 3.6 Tcf of proven gas in place.   In end 2014, CNOOC made a gas discovery in Lingshui 25-1-1 in this deep water area, the well penetrated 73 m gas pay and tested 36 MMcf/d of gas and 395 b/d of condensate from the Huangliu Formation of the Miocene.   In 2015 CNOOC made two additional gas discoveries, Lingshui 18-1-1 and Lingshui 18-2-1, in this area. Lingshui 18-1-1 tested 37.6 MMcf/d of gas and 165 b/d of oil (more likely condensate) from the Pliocene Yinggehai Formation indicating 1.9 Tcf of possible gas in place reserves.
China (Central Qiongdongnan Depression (Qiongdongnan Bsn)) Lingshui 18-2 (Qg) 1