Star Energy has plugged and abandoned wildcat Stella 1X in the onshore area of the Sebatik PSC, located in the Tarakan Basin, North East Kalimantan, as dry. The well was drilled to its final TD of 953 m MD in mid-August 2019.  Stella 1X was targeting Lower Miocene sandstones of the Naintupo Formation or equivalent. The well was spudded in late July 2019 and was drilled using PT Bolindo Nusantaraâs "BN-03" type 750 HP land rig. Planned total depth for the well was approximately 3,000 feet subsea (914 m TVD SS). Drilling operations were expected to be completed in approximately 15 days.  The Stella prospect is located in the western portion of Nunukan Island. Estimated gas in place was around 93 Bcf with potential production capacity of approximately 5 MMcfg/d from the well, in case of success.  SKK Migas visited the well site in mid-July 2019, shortly before the expected spud date. Reportedly, well site preparation was completed in late March 2019, but the well was delayed while waiting for the rig and necessary equipment to arrive at the site.  Stella 1X fulfilled the firm commitment for the block. The operator has likely received a one-year exploration period extension until 6 October 2019, after the previous exploration period expired in October 2018. The drilling programme has been delayed several times from the previous planned date of late 2016/early 2017.  The last exploration activity in the block prior to Stella 1X was the completion of a 510 km 2D seismic survey in the offshore portion in late March 2012. The seismic acquisition commenced in late February 2012 and was conducted by BGP Indonesia.   Previous drilling in the Nunukan island took place in 1939-40, with Nunukan 1 and Nunukan 2 drilled by BPM, encountering oil and gas shows.  Star Energy holds 100% operating interest in the Sebatik PSC, which was officially awarded on 7 October 2005. Firm commitments include USD 950,000 in G&G studies, acquiring 500 km of 2D seismic data and drilling one exploration well. In February 2019, the Sebatik contract type was converted from cost recovery PSC to gross split.  Background Information  The Sebatik PSC covers an area of about 1,395 sq km following an area relinquishment in 2009. It lies both onshore, covering portions of the Sebatik and Nunukan islands, and offshore. On the southeast coast of Sebatik island, Star Energy reported oil and gas seeps coincident with the plunging axial trace of the Sebatik anticline. This could suggest fault-controlled migration from source kitchen in the offshore. Main trapping mechanisms expected are rollover anticlines associated with major growth faults, while stratigraphic pinch-outs on the flanks of the rollover anticlines. The main reservoir targets are Middle Miocene to Pliocene deltaic sandstones of the Tabul and Santul formations or their equivalents while Miocene and Plio-Pleistocene carbonates offer secondary objectives. Migration/distance to kitchens could be one of the risks in the area.  The area covered by the Sebatik PSC has been leased under several PSCs since 1967. 2D seismic was acquired under all PSCs and five wells were drilled within the block limits. Four of these were drilled by BPM under pre-WWII concessions, including oil shows encountered in Nunukan 1, and oil and gas shows in Nunukan 2.   Between 1967 and 1981, Japex, Amoseas and Total held the inshore area of the Tarakan Basin under the Bunyu PSC. Amoseas assumed operatorship in 1975, and in 1977 drilled Mayne 1 (oil and gas shows). Sceptre/Hadson held the Bunyu PSC between 1985-1993 but did not drill within the new Sebatik PSC.  Bounded to the north by Sabah (East Malaysia), to the east by PT Petroner's Bengara I PSC, to the south by PT Pertamina/Medco's Simenggaris JOA and PT Medco's Nunukan PSC and to the east by open Indonesian acreage but also block ND 6 of Malaysia, the Sebatik PSC covers onshore areas and water depths to over 200m. There appear to be some slight onshore and offshore overlaps between the Sebatik coordinates provided by Migas and the Malaysian boundary claim.  Prior to the 2012 survey, no activities have been conducted since 2006 wherein a 523km 2D seismic survey was shot. The 523km 2D seismic survey was conducted from September to late November/early December 2006. Two wells, Nunukan 1 and Sebatik 1, were planned to be drilled in the block since 2007. Both wells are targeting Middle Miocene deltaic sandstones and have a PTD of 3,500 to 3,800 m.
Indonesia (Tarakan Sub-basin (Greater Tarakan B.)) Bunyu