The L-Blocks are a series of gas fields discovered between 2004 and 2015 in the North Sea, offshore from the Netherlands. Oranje-Nassau Energie B.V. (ONE) hold interests in the fields of varying stakes, as part of our diverse portfolio of operational and non-operational assets in the Dutch sector.

ONE’s operations in the L-Blocks

The L08-D field was discovered by well L08-16x drilled in 2004, producing from a Permian-aged Rotliegend sandstone reservoir at a depth around 3775m. In 2009, the deviated L11b-A06 appraisal and later producer well was drilled by Cirrus Energy from the then Chevron-owned L11b-A platform. The L08-D Unit partners committed to develop the field and acquired the L11b-A platform from Chevron in August 2009. Initial modifications to the platform were completed and first gas from the L08-D Field flowed in October 2009. A second development well, L11b-A08, was successfully drilled at the end of 2012. In May 2015 a third development well, L11b-A09, was spudded and first gas was produced on August 8, 2015. The L08-D field straddles the L8a, L8b and L11b blocks and is operated under a Unit Agreement with partner EBN. ONE’s current interest in the field is 58.1%.

Asset
Country
Gas/Oil
Operator
One equity
Partners
L08-D
NL
Gas
ONE
58.1%
EBN
Asset
Country
Gas/Oil
Operator
One equity
Partners
L11-Gillian
NL
Gas
ONE
60%
EBN

The L11-Gillian gas field was discovered with well L11-14 in the fall of 2015 by ONE and partner EBN. L11-14 was drilled as a sidetrack from the earlier, technically failed, and abandoned, Cirrus well L11b-A07 on the L11b-A platform. After testing it was completed as production well L11b-A07Z. ONE holds 60% interest in the L11-Gillian field, which straddles the L11b and L11c production licences.