VNG Norge AS, operator of production licence 586, is about to complete drilling of appraisal well 6406/12-3 B on the 6406/12-3 S (Pil) oil and gas discovery, as well as the 6406/12-3 A wildcat well on the Bue prospect.
The discovery was proven in Upper Jurassic reservoir rocks in the spring of 2014. The 6406/12-3 B appraisal well and 6406/12-3 A wildcat well were drilled 1.7 and 2.1 km, respectively, northwest of the discovery well 6406/12-3 S. Before 6406/12-3 B was drilled, the operator’s resource figures for the discovery were between 6 and 21 million m³ of recoverable oil and between 2 and 6 billion m3 of recoverable gas.
The objective of 6406/12-3 B was to delineate the discovery in Pil to the northeast with regard to spread, thickness and reservoir properties of Upper Jurassic reservoir rocks (Melke and Rogn formations), as well as to determine the oil/water contact. The well encountered an 82 m oil column in sandstone in the Melke formation with good reservoir quality. The oil/water contact was encountered somewhat deeper than expected. The resource estimate for the oil and gas discovery in 6406/12-3 S (Pil) has now been adjusted to between 8.8 and 21.1 million m³ of recoverable oil and condensate, as well as between 2.7 and 6.1 billion m3 of recoverable gas.
The objective of 6406/12-3 A was to examine the spread, thickness and reservoir properties of Upper Jurassic reservoir rocks (Rogn formation) in the Bue prospect, as well as to determine the pressure and petroleum/water contact. The well encountered an 18 m oil column in sandstones from the Rogn formation, with reservoir quality varying from good to very good.
Pressure data indicates no communication between the discoveries in Pil and Bue and the well has therefore proven a separate discovery in Bue. Preliminary calculation of the size of the discovery in Bue is between 1 and 4 million m3 of recoverable oil and condensate.
Extensive data acquisition and sampling have been carried out, including fluid samples.
These are the second and third exploration wells in production licence 586. The licence was awarded on 4 February 2011 (APA 2010).
Wells 6406/12-3 B and A were drilled to vertical depths of 3967 and 3656.5 m below the sea surface, respectively. Both wells were terminated in the Melke formation in the Upper Jurassic. The water depth is 324 m. The wells will be permanently plugged and abandoned.
Wells 6406/12-3 B and A were drilled by the Transocean Arctic drilling facility, which will now proceed to production licence 555 in the northern part of the North Sea to drill wildcat well 33/2-1, where Lundin Norway AS is the operator.
Adapted from press release by Cecilia Rehn
Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/11072014/delineation_of_oil_and_gas_discovery_near_the_njord_field_in_the_norwegian_sea/