GEO ExPro

Exploration Update - Netherlands

Significant discovery and appraisal in The Netherlands with 24m net interval of high permeability sands in the Permian Lower Rotliegendes.
This article appeared in Vol. 14, No. 6 - 2018

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Map showing the location of the N05-01-S1 widcat field and the Ruby discovery in the Dutch N05 block. Hansa Hydrocarbons confirmed on 26 September 2017 that its new field wildcat N05-01-S1 in the Dutch N05 block was a significant gas discovery in the Permian Lower Rotliegendes, with 24m net interval of high permeability sands, thought to be Findorf sands. A DST in the vertical well tested 53 MMcfgpd, although flow rates were limited by surface equipment. The discovery, known as Ruby, is the first well to be drilled targeting the basal Rotliegend sands; it is also the first in the area since the early 1990s and the first well to be drilled with the benefit of 3D seismic data.

The well spudded on 1 May 2017 but it was junked and sidetracked on 13 May. TNO, which oversees developments in the Dutch hydrocarbon industry, confirmed the well as a success. A down-dip sidetrack appraised the discovery, with operations concluding on 25 August 2017.

The block, which lies in 25–30m deep water, forms part of the GEms acreage, named for its location in the Ems estuary and which includes Dutch blocks N04, N05, N07c and N08 and extends into German waters. In January 2017 Hansa farmed out half its equity in the Dutch GEms licences to Oranje-Nassau, including operatorship of the N05 well. In addition to Hansa Hydrocarbons Ltd, which now holds 30%, the partners in N05 are Oranje-Nassau Energie BV with 30% and Energie Beheer Nederland with 40%. They have also identified prospects in the Dutch and German GEms acreage, with 2 Tcfg estimated mean in-place prospective resources across the licences.

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