IHS Markit understands that Pertaminaâs deeper pool wildcat Belimbing Deep 1 (BED 1), in the Sumbagsel 2 PPC, located in the South Sumatra Basin, has been plugged and abandoned around February 2019, with results unreported.  The well, located in the Belimbing Jaya Village, in the Muara Enim Regency, was probably spudded in early November 2018, drilling using PDSIâs Rig no.42 N-1500-E, and may have a PTD of around 3,500 m. Typical exploration targets in the area are the Lower Miocene Batu Raja Formation and Talang Akar Formation.    The last exploration well in the block was Sekarwangi 1, completed in late October 2018. The well may have encountered gas, however the three DST tests performed at depths of 3,218 m to 3,228m, 3,074 m to 3,080 m and 2,071 m to 2,074 m have likely shown intermittent flow. The well was since plugged and abandoned.    Sekarwangi 1 was possibly spudded in May 2018, using PDSI-operated Rig no.42 N-1500-E. The well is located within the vicinity of Darmo village, in the Muara Enim Regency. Drilling operations was reportedly to be ongoing as of July 2018.Â  Earlier in April 2018, Pertamina conducted socialization activities with the local community in preparation for the drilling activity.    The previous drilling activity in the block was drilling of wildcat Sakura 1, spudded in September 2017. The well, with a PTD of 3,800 m, was targeting the deeper sandstones of the Upper Eocene-Lower Oligocene Lahat Formation, and secondarily the Upper Oligocene Talang Akar Formation. It is understood that the well encountered only minor gas indications.    In November 2017, the company likely completed a 2D seismic survey over the Selingsing area. As of June 2017, approximately 85% of the planned 608 km had been acquired. The survey was conducted by PT Elnusa. Acquisition commenced in January 2017. Over 50% of the acquisition had been completed as of February 2017. The seismic campaign was initially expected to last for approximately four months.    A socialization event to inform the local community about the planned survey was held on 6 October 2016. Data acquisition will cover areas in the vicinity of the Talang Akar-Pendopo field, within the Talang Ubi sub-district of South Sumatra Province. Preparations for the survey were ongoing in 2H 2015. In late 2014, Elnusa issued a pre-qualification tender for a subcontract related to the acquisition. Initial socialization activities with the locals were likewise conducted in late November 2014.    Pertamina holds 100% operatorship of the block.    Background Information    Upstream holding company PT Pertamina EP was established on 13 September 2005. PPC terms cover a 30 year lifespan with a 10% relinquishment after 10 years and also include a 25% DMO on both oil and gas and a 67.2269%/32.7731% profit split for oil and gas between PT Pertamina EP and the government. The conversion to PSC status under BPMigas supervision was part of the ongoing process of privatization of PT Pertamina required under Oil and Gas Law No 22/2001.    PT Pertamina's upstream operating areas, converted to "Production Sharing Cooperation Contracts" (subsequently termed "Pertamina Petroleum Contracts" or PPCs), were signed with BPMigas on 17 September 2005. The signature was delayed from its original scheduled date of 25 June 2004 due to undisclosed "internal problems" within PT Pertamina. This was then rescheduled to take place on 12 December 2004 at a PSC signing ceremony but it was again delayed as the PPC model was still being examined by the government. PT Pertamina then stated that it would be ready to establish operating subsidiaries on 17 September 2005.    Numerous exploration wells have been drilled by Pertamina in the block, to find additional reserves and support domestic production.    Exploration drilling in 2011    Semparuti 1 wildcat was suspended as a gas with condensate discovery in March 2011. It was reported to have flowed 5MMcfg/d plus condensate during testing. Further details were not provided. Testing operation commenced in late January 2011. The well, located within the vicinity of the Kuang field, was spudded in late December 2010 using the âNational 80â rig and was drilled to a TD of 1,650m as planned. It targeted sandstones of the Upper Oligocene to Lower Miocene Talang Akar Formation, carbonate build-up of the Lower Miocene Batu Raja Formation and the Pre-Tertiary Basement.    Prabumenang 7X (oil shows), Prabumenang 8X (oil and gas), Tasim 4X (oil and gas), Kuang EX (oil and gas) and Semparuti 1 (gas and condensate discovery) were the other exploration wells drilled in 2011.    Exploration drilling in 2012    Hibiscus Selatan 1 was suspended as an oil and gas discovery on or around 5 January 2012. IHS understands that at least five DSTs were conducted, with the well testing a cumulative rate of more than 300bo/d plus 2MMcfg/d. The well, located about 2.3km west of the Tanjung Tiga Barat oil field, was spudded on 3 October 2012 and was drilled to a TD of 2,250m using the âN55XCâ rig. It had a PTD of 2,250m and primarily targeted Upper Oligocene to Lower Miocene Talang Akar sandstones trapped in an anticline. Secondary target is the fractured Pre-Tertiary Basement.     Lavatera 1 wildcat was reported on 20 February 2012 to have successfully encountered gas in the Middle to Upper Miocene Air Benakat sandstones, which is one of the wellâs objectives. The test interval at 820-825m from the said formation flowed 5.7 MMscfg/d through a 36/64â choke. A local press report has also mentioned test flow rates of 4 MMscfg/d through a 48/64â choke from the well but further details were not reported. A Put on Production (POP) plan was intended to be submitted, targeting production in early 2013 at a rate of 3 MMscfg/d. Gas will be sent to PGN. Lavatera 1, located 3.4km northwest of the Pager Dewa gas and condensate field, was spudded on 25 November 2011 using the âXJ-750â rig and it was drilled to a TD of 1,958m. It had a PTD of 1,987m and it targeted multiple reservoirs. Aside from the Air Benakat sands, other reservoir targets are carbonates of the Lower Miocene Batu Raja Formation and sandstones of the Upper Oligocene to Lower Miocene Talang Akar Formation. Testing commenced in January 2012. Rig was released on 14 February 2012.    According to a local press report on 16 April 2012, Pertamina discovered gas and condensate in the Piretrium 1 wildcat. The well was reported to have tested a cumulative rate of 15.35MMcfg/d plus 557bc/d in sandstones of the Middle to Upper Miocene Air Benakat Formation and the deeper Eocene to Oligocene Lahat Formation. The well, located 4.4km southeast of the Tasim gas and condensate field, was spudded on 29 January 2012 using the âNYT-19â rig and was drilled to a TD of 1,845m. It had a PTD of 1,845m. It targeted multiple reservoirs â carbonates of the Lower Miocene Batu Raja Formation, sandstones of the Air Benakat Formation and the Pre-Tertiary Basement.    Pertamina also drilled several appraisal wells in 2012, namely Pemaat 3X (gas with condensate), Pemaat 4X (dry), Pemaat 6X (dry), Tasim 5X (gas with oil), and Kuang DX (oil and gas).    Exploration drilling in 2013    The Puring 1 wildcat was suspended as an oil discovery on 13 February 2013. The well, located about 1.5km north of the Kuang field, was spudded on or around 13 December 2012 and was drilled to a TD of 1,839m. It had a PTD of 1,840m and primarily targeted the Lower Miocene Baturaja carbonates. Puring 1 is the eighth exploratory well was spudded in the block in 2012 following the Hibiscus Selatan 1 wildcat.    Gandaria 1 wildcat was suspended as a gas and oil discovery in late August 2013, with at least six DSTs was completed by 19 August 2013. According to local press report, the fifth DST yielded 2 MMscfg/d and 215 bop/d. It was drilled down to a TD of 2,025 m on or around early July 2013. The well was spudded on 21 May 2013 and it could have PTD of around 2,200 m. It will primarily target Lower Miocene Baturaja carbonates with Upper Oligocene to Lower Miocene Talang Akar sandstones as secondary targets. The well located around 8km southwest of Puring 1 oil discovery well in Muara Enim regency. Gandaria 1 is the first exploration well spudded in the block in 2013.     Mandevilla 1 was plugged and abandoned in early December 2013. According to a local report, the well flowed non-commercial gas amounts during testing. The operator commenced well-testing operations in late October 2013 and prior to the test, it was drilled past 1,125 m on 4 October 2013. The well was spudded on 9 September 2013, located within the Rejang Lebong Regency of Bengkulu province, around 28km southwest of Musi field. It could have PTD around 1,100m to 1,200m. It will primarily target Lower Miocene Batu Raja Formation and Upper Oligocene to Lower Miocene Talang Akar Formation as secondary targets    Akaliva 1 ST1 wildcat was abandoned as a gas shows well on 27 December 2013. The operator conducted at least three DSTs in the well, with two DSTs was completed on 21 December 2013. Well testing operation commenced in late November 2013. Last reported drilled depth was at around 1,550 m within the first sidetrack hole on 20 November 2013. From previous report, the well was drilled down to 870 within the original hole on 12 October 2013. The well was spudded using âN-80â land rig on 27 September 2013, located south of Selo field of Betun-Selo KSO. It had a PTD around 1,540 m, primarily targeting Upper Oligocene to Lower Miocene Talang Akar Formation and sandstone reservoirs of Eocene to Oligocene Lahat Formation. The Pre-Tertiary Basement provided secondary target for the well.
IHS Markit understands that Pertaminaâs deeper pool wildcat Belimbing Deep 1 (BED 1), in the Sumbagsel 2 PPC, located in the South Sumatra Basin, has been plugged and abandoned around February 2019, with results unreported. 