Block 31 Oil Field
Jupiter’s Block 31 shown on Figure 1 is amongst the producingfields of the basin. The 1st well on the Contract Area (NWZ2) was drilled by the Soviets in 1969. Jupiter has since drillednine new wells since purchasing the licence in 2008. The firsteight wells - J-50 (2009), J-52 (2010), J-51 (2011), J-53(2012), J-55 (2012), J-58 (2012), J-59 (2013) and Well 19 (2014)all discovered oil. The most recent well (J-57) was not successfulin identifying hydrocarbons.
Block and Oil Field is an oilfield in Plaquemines Parish. Block and Oil Field from Mapcarta, the free map. Oil, Oil/Gas Field - DEVELOPED/Undeveloped Gas, Gas/Condensate Field - DEVELOPED/Undeveloped Indigenous Marginal Field OML 89 OPL Z211 OPL 273 OML 111 OML 127 OML 42 Projection: World Equidistant Cylindrical OPL 215 OPL 903 Date: June 2005 OML 51 OPL 325 PL 24 Oil Pipeline OPL 338 OML 24 Gas Pipeline Oil Pipeline (Planned) Gas Pipeline (Planned. The field will be developed in such a way that it produces between 30,000 and 40,000 barrels of oil per day. However, extraction rate of 31% has raised concern over Uganda’s ability to optimally.
The J-55, J-58 and J-59 wells are all located inthe new West Zhetybai field to the south of the alreadydiscovered Akkar East field. The Akkar East field has beendelineated by the J-51, J-52, J-53 and #19 wells. The J-50well is located on Akkar North (East Block) (see Fig 4 below).
Block 31 Oil Field
Independently verified reserves have, to date, beenencountered in the Mid Triassic Carbonates.
Block 31 Oil & Gas Field Development
The Kazakhstan reserves classification system, which has beendeveloped from the Russian classifications, divides geological(in-place) and recoverable reserves into various categoriesincluding C1 and C2. The basis for the evaluation, andcategorisation, is the geological data set, the C1/C2classification system does not take into consideration thecommercial factors impacting the development of the identified C1and C2 reserves. Current State approved preliminary C1/C2 estimatesfor Block 31 are:
- C1+C2: ~58 mmbbls
- C1: ~24 mmbbls
- C2: ~34 mmbbls
In October 2015, Tullow completed a 20% farm out of Block 54 to Noble for a carry, leaving Tullow with a 30% interest and retained operatorship. Tullow expanded its acreage position in Suriname in the second half of 2018 by signing a 100% operated interest in Block 62. This is the Group’s third licence and it sits adjacent to Blocks 47 and 54.
Under the SPE’s Petroleum Resources Management System (PRMS)reserves are defined as those quantities of oil (and gas) which areestimated to be commercially recovered from a known accumulationfrom a given date forward, i.e. determined on the geologicaland commercial data set. The commercial nature ofPRMS reserves is relevant in relation to the Jupiter Energy reportsin that these estimates included only a small quantity of reservesfor the two areas covered by wells J-53 and J-55; further drillingwork needs to be carried out to establish commercial productionfrom these separate areas. Current 1P/2P/3P estimates for Block 31are:
Block 31 Oil Fields
- Proved Reserves: 1P 9.7 mmbbls
- Proved plus Probable Reserves: 2P 19.2 mmbbls
- Proved plus Probable plus Possible: 3P 28.7mmbbls
Fig 4 – Mid Triassic Northeast Akkar OilField
J-50 and J-52 penetrated a 100-120m Mid Triassic Carbonatesection which was wholely oil saturated. J-51 penetrated a160m section. J-53 confirmed approximately 87m of gross and 56m ofnet pay at the Middle Triassic carbonate reservoir unit. Core,wireline logs and flow testing suggests about half the section isproductive in all wells. The field is mapped to extend over anarea of ~14 sq km.
Fig 5 – Mid Triassic Northeast Akkar Oil Field with lineof section
Fig 6 – J-50 Dip Section
J-52 encountered the Lower Jurassic which flowed oil in NWZ#2 inan updip position. This 25m sand was oil saturated on logsand core but when flow tested it was shown that it may not beviable for commercial production. It is expected that there will befurther testing of this reservoir during future drillingprograms.
Fig 7 – NWZ#2 to J-52 Dip Section