OMV to further assess gas, condensate discovery near Osberg field

OMV (Norge) AS is assessing a gas-condensate discovery with a view toward further follow-up following conclusion of drilling two exploration wells in the North Sea. Preliminary estimates place the size of the discovery at 1.5-6.5 million std cu m of recoverable oil equivalent.

Exploration wells 30/5-4 S and 30/5-4 A, the first in production license (PL) 1100, were drilled about 10 km northwest of Oseberg field and 150 km northwest of Bergen in 95 m of water.

Well 30/5-4 S was drilled to a vertical depth of 5,003 m below sea level and was terminated in the Middle Jurassic in the Ness formation. The primary target was to prove petroleum in Middle Jurassic reservoir rocks in the Tarbert formation (the Brent group). The secondary target was to prove petroleum in Middle Jurassic reservoir rocks in the Ness formation (the Brent group) (OGJ Online, Sept. 23, 2022).

The well encountered a gas-condensate column of about 100 m in the Tarbert formation, which has a total thickness of 200 m, and sandstone layers totaling 96 m, with poor reservoir quality. Gas-water contact was not encountered.

The Ness formation is dry, with traces of petroleum.

Appraisal well 30/5-4 A was drilled to respective vertical and measured depths of 4,726 and 4,946 m subsea. It was terminated in the Middle Jurassic in the Tarbert formation. The objective was to conduct a formation test in the Tarbert formation. The well encountered a gas-condensate column of about 90 m in the formation. A total of 150 m of the formation was drilled, with sandstone layers totaling 90 m with poor reservoir quality. Gas-water contact was not encountered.

Extensive data acquisition and sampling have been conducted in the wells, including a successful formation test in the Tarbert formation in 30/5-4 A. The average production rate from the test was about 60,000 std cu m/d gas and 45 std cu m/d condensate through a 10/64-in. choke.

The wells will be permanently plugged.

OMV is operator at PL 1100 (40%) with partners Source Energy AS (20%), Wintershall DEA Norge AS (20%), and Longboat Energy Norge AS (20%).