Ongoing preparations at DvalinDvalin gas field location. Source: Norwegian Petroleum

Ongoing preparations at Dvalin

Wintershall DEA recently began drilling four production wells on the Dvalin field, getting ready to start production in 2020.

The Dvalin field consists of two separate structures. Dvalin East (Zidane 1) was proven in 2010 by 6507/7-14 S well and is located 15 km northwest of the Heidrun field. Dvalin West (Zidane 2) was proven in 2012 by 6507/7-15 S well and is located 3.5 km west of Dvalin East.

Well 6507/7-14 (Zidane 1) is drilled on a fault block targeting the Jurassic reservoir. Further west lies a small horst, Zidane 2. Souce: DEA

The Dvalin gas field located in PL435 in the Norwegian Sea is operated by Wintershall DEA (55%), with Petoro (35%) and Edison (10%) as partners.

Both Dvalin East and Dvalin West contain gas in Middle Jurassic sandstone in the Ile and Garn Formations. The reservoirs lie at a depth of 4,500 m and have high pressure and high temperature (HPHT). The homogeneous shallow marine Garn sandstone has good reservoir quality, while the more heterogeneous and fine-grained Ile sandstone has less favourable reservoir properties.

Lithostratigraphic chart of the Norwegian Sea, zoomed on the Jurassic reservoirs. Source: NPD

According to Wintershall DEA the field has estimated reserves of 113.3 MMboe.

Dvalin is being developed as a subsea field tied back to to the Equinor operated Heidrun platform. The four wells will be drilled to a depth of around 4,500 m.