ST 36-2-1d was completed in mid-August 2018 without result reported.   CNOOC â Zhanjiang spudded a NFW in the Qiongdongnan Basin 26 May 2018. ST 36-2-1d, located in the Songtao Sag in a 220 of water, has a target in Miocene-Oligocene clastic play. âHYSY 981â S/S is used for the drilling operation.   Several wells have drilled in this area but without commercial discovery yet.  In 2001, CNOOC drilled ST 36-1-1and completed with minor shoe in the Tertiary.   In 2016 Kufpec drilled ST 34-3-1 in block 52/22, the well completed with thin gas pay but no details available.   In 2018 Kufpec completed ST 27-5-1d in block 52/22 without result reported.   Background Information    The Qiongdongnan Basin, covering over 68,000 sq km, is generally less explored. As early as in 1979, Ying 9 tested sub-commercial oil from the Oligocene Lingshui Formation in the central north of the basin.   In the early 1980s, Ya 13 gas field was discovered in the west part of the basin with the main in reservoir in the Oligocene Lingshui Formation too. Â   In the 1990s, CNOOC made sub-commercial gas discovery in Baodao 19 area in the northeast of the basin, with main reservoir in the Miocene clastic rocks.   In 2014 CNOOC made Lingshui 17-2 deep water gas discovery in the southern part of the basin, reservoir in the Miocene channel sands. Â   The exploration in the Qiongdongnan Basin is at a relatively young stage. Numerous exploration possibilities still remain. The exploration possibilities are believed to exist in several structural belts including Yanan, Lingshui, Songdong, and Songnan half-grabens. Deep water gas has been becoming a new exploration target in the southern part of the basin. Gas resources are widely distributed in the Yanan, Lingshui, Ledong, Songnan, Baodao and Changchang sags, whilst oil resources are generated from the Songdong, Songxi and Beijiao sags. Before 2013, six deep water wells in the basin were completed with one small gas discovery Lingshui 22-1 and other five dry wells. In 2014, CNOOC made a large gas discovery (Lingshui 17-2) in deep waters, and, in 2015, another deep water gas discovery (Lingshui 25-1) was made in the basin. However, potential in deep water gas exploration still exists in the Qiongdongnan Basin comparing to the neighboring Pearl River Mouth Basin in which Husky has made several large gas discoveries in deep water area such as Liwan 3-1, Liuhua 34-2 and Liuhua 29-1.
ST 36-2-1d was completed in mid-August 2018 without result reported. CNOOC â Zhanjiang spudded a NFW in the Qiongdongnan Basin 26 May 2018. ST 36-2-1d, located in the Songtao Sag in a 220 of water, has a target in Miocene-Oligocene clastic play. 