Equinor reported on 4 July 2019 that it has made a new oil discovery at Oseberg Vestflanken. An exploration extension of development well 30/6-H9 (T4) found a 112 m oil column in the Lower Jurassic Statfjord Formation in the southern part of the Alpha structure, a segment of Oseberg that was previously undrilled. Estimated recoverable reserves are 22 MMbo. Equinor will bring the new volumes online shortly and may use water injection to boost production further. The drilling was part of the Oseberg Vestflanken 2 project which came onstream in October 2018 using a new platform â Oseberg H.   Oseberg H is the first unmanned wellhead platform on the NCS, a new concept for the country but widely used elsewhere in Northwest Europe including Denmark and the Netherlands. The platform has 10 slots and two existing subsea wells were re-used for the Oseberg Vestflanken 2 development. Two of the slots are used for gas injection for IOR and extra injection gas is received from the existing gas injection system in the area via a new pipeline. The wells are controlled from the Oseberg Field Centre and this is also where processing takes place. Equinor expects to recover 110 MMboe (of which 62 MMb is oil) from the Alpha, Gamma and Kappa structures (between 2,400 m and 3,100 m subsea) at a cost of NOK 6.5 billion (USD 778 million) reduced from the PDO estimate of NOK 8.2 billion (USD 981 million). The field is expected to remain onstream until 2040.  Oseberg was discovered in 1979 and lies across blocks 30/6 and 30/9 in the Viking Graben. Oil production started from the fieldâs Middle Jurassic Brent Group reservoir in 1988 and first gas exports were achieved in 2000 (it was previously re-injected). The four previous platforms on the field are: A (processing and accommodation), B (drilling and water injection), C (production, drilling and accommodation) and D (gas processing). Oseberg is a hub for a number of other accumulations in the area. Initially the field was expected to produce 2 Bboe over its lifetime but this is now expected to be around 3.1 Bboe.  Oseberg is unitised and interests are divided between Equinor Energy AS (49.3% + operator), Petoro AS (33.6%), Total E&P Norge AS (14.7%) and ConocoPhillips Skandinavia AS (2.4%).
Norway (Oseberg Fault Block (Horda Platform)) Oseberg