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The Howe field (RockRose – 20.00%) – also identified as the Howe Main area – lies 14 kilometres east of Nelson. It is operated by Shell and contains 41 degrees of API oil in good quality Fulmar Jurassic sandstone at a depth of ca 10,300 ft TVDSS. The field was appraised by Well 22/12a-8, which encountered an oil water contact in a 160 feet thick reservoir section down dip of crestal Well 21/12a-1. The initial reservoir pressure was a 6700 psi, some 2700 psi over-pressured.

The Howe well produced through a sub-sea template tied back by pipeline to Nelson. The field has been developed through this single sub-horizontal well following the initial appraisal of the field. The oil production rate peaked at around 11 Mstb/d in 2005. The field is now at a mature stage of production, producing some 2.5 Mstb/d oil and 0.4 Mbbl/d water, a water cut of some 14%. The cumulative oil production as at 31/07/2017 is 15.4 MMstb.