UKCS: West Newton A-2 confirms onshore discoveryWest Newton area. Source: Union Jack Oil

UKCS: West Newton A-2 confirms onshore discovery

The initial petrophysical evaluation identified a gross oil column of approx. 45 m underlying a gross gas column of approx. 20 m within the Permian-age Zechstein Kirkham Abbey carbonate interval.

According to Reabold Resources the WNA-2 appraisal had two objectives:

  • To appraise the Permian Kirkham Abbey Formation gas discovery: shoal and “slope deposit” reservoirs
  • To test a deeper Permian Cadeby Formation reef flank oil prospect

Initial open hole information indicated that in many respects the zone penetrated was consistent with that encountered in the WNA-1 well, however, the WNA-2 well indicated the presence of both gas and oil in the reservoir as opposed to a pure gas project as originally thought.

The press release from Rathlin Energy (UK) Limited presents the latest updates for WNA-2 well:

  • Evaluation of the WNA-2 open hole data has identified an estimated gross hydrocarbon column of approx. 65 m in the Kirkham Abbey formation
  • A cased hole pulsed-neutron tool was run across the Kirkham Abbey zone as a means to differentiate and confirm fluid saturations
  • With the indication of a potentially significant oil column, the Extended Well Test (“EWT”) has been temporarily suspended in order to review and revise the well test design to deliver the necessary test information to validate this important onshore resource
  • Following the integration and evaluation of the core, petrophysical, seismic and test data, the Operator and partners intend to commission a revised CPR to re-assess volumetrics and revise NPV10 values based on the information acquired from the WNA-2 well

Detailed Geological model and Density section for the West Newton area. Source: Union Jack Oil

The WNA-2 well exhibits encouraging porosities on logs and in the core, particularly in the identified oil zone, where in excess of 30 m of porosity has been measured. The core also exhibits natural fracturing which is confirmed by an imaging log run across the entire Kirkham Abbey interval.

Additionally, the WNA-2 well data provides a good tie to the high quality three-component 3D seismic volume that covers the entire West Newton project. The new data allows for a revised interpretation of the seismic volume incorporating the well and the newly identified gas over oil gross hydrocarbon column.

The West Newton A-2 (WNA-2) appraisal well is located within onshore PEDL183 and operated by Rathlin Energy (UK) Limited with 66.67% interest, with Union Jack Oil and Humber Oil & Gas, each holding 16.665% interest, as partners.

The license is located within the Western sector of the Southern Zechstein Basin and contains the West Newton A-1 (WNA-1) discovery well.

A best estimate contingent resource of 31.5 MMboe was identified for WNA-1 in a Competent Person’s Report (“CPR”) compiled by Deloitte in June 2017.