Dana Petroleum has encountered hydrocarbons with its 43/27a-4 well, being drilled to appraise the southeastern area of the Johnston gas field in the UK southern North Sea. The initial vertical pilot hole found gas-bearing sandstones in both the Rotliegend and Carboniferous horizons. The well was then sidetracked to drill a 2,850 ft horizontal section through the most productive Rotliegend reservoir section to provide an optimum offtake point for additional gas production.
Offshore staff
(North Sea, UK)-Dana Petroleum has encountered hydrocarbons with its 43/27a-4 well, being drilled to appraise the southeastern area of the Johnston gas field in the UK southern North Sea. The initial vertical pilot hole found gas-bearing sandstones in both the Rotliegend and Carboniferous horizons. The well was then sidetracked to drill a 2,850 ft horizontal section through the most productive Rotliegend reservoir section to provide an optimum offtake point for additional gas production.
The horizontal well has been completed and will be known as the J4 producer. Well J4 has been production flow tested back to theNoble Julie Robertson drilling rig at rates of 55 MMcf/d.
Following completion of the flow testing operations, the J4 well will be connected through an 8-in. diameter pipeline, some 6.9 km along the seabed into the existing Johnston field infrastructure. The start-up of commercial gas production from J4 is expected during October and should significantly boost output from the Johnston field.
