Rosneft plugged and abandoned new field wildcat Phong Lan Dai Clastic Center 1X (06-1-PLDCC 1X) in Block 06-1, located in the Nam Con Son Basin, on or around 20 October 2019. Results has not been released. The well, spudded on or around 12 May 2019 using the Japan Drilling âHakuryu 5â S/S and tested the Middle to Upper Miocene Thong clastic.  The last activity in the block was the drilling campaign at Phong Lan Dai Deep (PLDD) and Lan Do between April and July 2018 utilizing the Japan Drilling âHakuryu 5â S/S. The campaign consisted of 06-LD 3P (Lan Do 3P) and 06-1-PLD 1P (Phong Lan Dai Deep 1P).  The block contains three producing fields, Lan Tay (LT), Lan Do (LD) and Phong Lan Dai Deep (PLDD). Lan Do and Lan Tay were discovered by BP Exploration Vietnam Co in 1993 while Phong Lan Dai Deep (PLDD) was discovered by Rosneft in 2016. Gas production from Lan Tay and Lan Do commenced on 21 November and 2002 and 7 October 2012 respectively. Phong Lan Dai Deep (PLDD) was brought onstream on 28 October 2018 and producing approximately 100 MMcfg/d and 90 b/d in August 2019.  The Lan Tay field produced approximately 60 MMcfg/d of gas and 400 b/d of condensate while Lan Do field produced approximately 260 MMscfg/d of gas and 180 b/d of condensate in August 2019.  Block 06-1 is operated by Rosneft Vietnam (35%) and partners ONGC-Videsh (45%) and PVEP (20%).   Background Information  The Phong Lan Dai Deep (PLDD) commenced production on 28 October 2018. Gas and condensate produced from the three fields, Lan Tay, Lan Do and PLDD will supply to the Dinh Co Gas Processing Plant (Nam Con Son Terminal) via the Nam Con Son gas pipeline 1.     A development drilling campaign in the PLDD and Lan Do commenced on 30 April 2018 utilizing the Japan Drilling âHakuryu 5â S/S. Drilling commenced with infill well, 06-LD 3P (Lan Do 3P) between 30 April and 25 June 2018 followed by 06-1-PLD 1P (Phong Lan Dai Deep 1P) between 28 June and 30 July 2018. The wells were completed as subsea completion and tie back to existing Lan Tay-A platform.  The Phong Lan Dai Deep (PLDD) field reserves and outline development plan (ODP) for the field was approved by the Ministry of Industry and Trade (MOIT) in September 2016 and 3 January 2017 respectively. The field development plan (FDP) submitted to PVN and Ministry of Industry and Trade (MoIT) around May 2017 and was approved in Q4 2017. An amendment to the gas sales and transportation agreement for the Phong Lan Dai Deep (PLDD) field was signed 16 October 2017. The PLDD field was developed via a one well subsea completion and tie-back to existing Lan Tay-A platform.  The Phong Lan Dai Deep (PLDD) field was discovered by Rosneft with 06-1-PLDD 1X (Phong Lan Dai Deep 1X), which was spudded on or around 7 March 2016 and was drilled using the âHakuryu-5â S/S to a TD of 1,340 m. The well successfully encountered gas and condensate from the Middle to Upper Miocene carbonate play.   A 1,000 sq. km 3D seismic survey acquisition was completed around mid-June 2016. The survey was commenced by CGG âAmadeusâ seismic vessel around mid-April 2016. Data processing is currently on-going by CGG.  Rosneft Vietnam became the block operator after acquiring TNK-BP in a deal which completed in November 2015. By acquiring TNK-BP, it gives Rosneft access to Block 06-1, with producing fields Lan Tay and Lan Do, and Block 05-3/11, which contain a small gas discovery, Nam Con Son pipeline and Nam Con Son terminal-Phu My pipeline.  TNK-BP announced it had signed agreements on 6 April 2011 for Block 06-1 confirming partners PetroVietnam (PVEP) and ONGC Videsh Ltd (OVL) and previous operator approved of the transfer of operatorship from BP to TNK-BP. The agreements have been submitted to the Ministry of Industry and Trade of Vietnam for final governmental approval. Block 06-1 containing the Lan Tay and Lan Do fields and is the largest gas producer in Vietnam, with 105.8 MMscfg/d net entitlements to TNK-BP in 2011. All acquisitions of TNK-BP from BP in both Vietnam and Venezuela are expected to be completed by mid-2011. Other interest holders in the Nam Con Son pipeline are PVEP (51%) and ConocoPhillips (16.33%) while other interest holders in the Phu My 3 power plant are SembCorp (33.33%) and Kyushu Electric Power-Nissho Iwai (33.33%).  The Lan Do field, discovered by 06-LD 1XST3 (Lan Do 1XST3) on 31 May 1993 was suspended as a gas well. The well was drilled with âDeepsea Duchessâ D/S and drilled to a TD of 3,412 m MD. The well reported to have flowed 8 MMcfg/d of gas in the Miocene carbonate. The Lan Do development project is part of Phase III development of Block 06-1. On January 2011, FEED for the field was completed and moved to the execution stage. By June 2011, contracts for the engineering, project management and fabrication of the umbilical for the field were awarded to Duco, Technipâs subsidiary. TNK-BP completed the two-well drilling campaign (06-LD 1P and 06-LD 2P) in the field on 19 April 2012 with the âOcean Monarchâ S/S. The wells were connected to the existing platform at the Lan Tay field through a 28 km, 12 inch subsea pipeline. First gas production from the field was achieved on 7 October 2012.  The operator completed the acquisition of a 1,850 sq km 3D seismic survey over the adjacent Block 05-2 and Block 06-1 in October 2008. About 376 sq km of 3D seismic data was acquired over the Phong Lan Dai area in the block. The survey which was contracted to the Furgo "Geo Atlantic" S/V, was reported to commenced in mid-August 2008.   First gas flowed from Lan Tay field, on 21 November 2002 and by February 2004 the Nam Con Son pipeline had transmitted a total of 35 Bcf gas onshore, also reaching the planned capacity. Combined recoverable reserves of the Lan Do and Lan Tay are estimated at 2 Tcf gas. Primary reservoirs are Upper Miocene (Terembu) carbonates deposited in a shallow open marine to possibly restricted marine back-reef environment. The Lan Tay discovery was brought on stream in late 2002/early 2003 at an initial rate of approximately 90 MMscfg/d as part of the Phase I development programme. Phase II of the development programme saw production being ramped up to about 350 MMcfg/d with the installation of compression facilities on the Lan Tay platform in 2007/2008. Phase III was planned to increase daily production to about 400 MMcfg/d with details of how production is to be increased undisclosed.   The Lan Tay field was discovered by 06-LT 1R (Lay Tay 1R) on 25 July 1994. The well was suspended as a gas well. The well was drilled using the âActiniaâ S/S and drilled to a TD of 3,397 m MD. On 11 December 2001, BP commenced a batch development wells, 06-1-LT 1P, 2P, 3P, 5P and 6P. The wells were drilled using Diamond Offshore âOcean Epochâ S/S. All five wells flowed gas at predicted rates upon testing. By mid-June 2001, the Lan Tay jacket has been installed with topside on location. The offshore pipeline with an approximate length of 360 km. The pipeline will be connected to a 30km on land pipeline to a terminal site located at Phu May.   BP relinquished the area that is now covered by Block 06/94 in November 1994, after spending over $300 million on its exploration drilling programme and retaining production areas around the Lan Tay and Lan Do gas fields.
Vietnam (Nam Con Son B.) Phong Lan Dai Deep