In-person: Victoria – modelling of a tight gas reservoir

11.30 - Lunch
12:00 - Presentation by Per Valvatne- Norwegian Offshore Directorate

Gas discoveries in tight formations on the Norwegian Continental Shelf (NCS) face development challenges due to difficulties in identifying productive well solutions. The seven largest tight gas discoveries in unlicensed areas contain over 500 GSm3 of estimated gas. Hydraulic fracturing has traditionally been used to develop tight reservoirs, but technical and operational challenges have limited its application.  Advancements in technology and completion techniques now offer solutions, significantly reducing costs and operational complexity. The Norwegian Offshore Directorate (NOD) have therefor started to assess what these advancements could mean for the possible economic development of unlicensed gas discoveries, initially using the Victoria discovery as an example. Victoria is an offshore HPHT discovery in the Fangst formation, about 30 km north-west of the Heidrun field. The reservoir depth is about 5000m TVD with pore pressures exceeding 800 bar and temperatures reaching 200°C, containing an estimated 140 GSm³of gas in place. Most of the gas is located in the low-permeability Tilje unit. A detailed geomechanical study shows that hydraulic fractures can be successfully placed in the Tilje unit, covering up to 70% of the target zone.  

This presentation will focus on a reservoir simulation study  carried out by the NOD to assess what recovery is possible from a tight discovery like Victoria. A four-well development with horizontal wells, each containing 8-9 transverse fractures, is predicted to recover approximately 30 GSm³. In addition, various sensitivities will be discussed, both geological and well related, to highlight possible uncertainties. These findings demonstrate that a development of the Victoria discovery is now viable with modern stimulation and completion technologies. 

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Participation fees:
FORCE members: NOK 0,-
Non-members: NOK 1500,-
University/Students: NOK 0,-

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Norwegian Petroleum Directorate org.no: 870917732