WNA-2 Update14 Nov 2019 18:01
Extract from the Rathlin West Newton Community Liaison meeting notes pertaining to WNA-2, particularly the need to redesign the EWT and apply for a permit for an ESP. (Electric Submersible pump).
Notes of Meeting (7 pm on 29 October 2019)
WN-A2 Update
TS said that before drilling and completing the analysis of the core and logging programme, the understanding was that the target was likely going to be a gas reservoir. However, it has since become evident that around 1/3 of the reservoir at WNA-2 is filled with gas and 2/3 filled with oil.
The testing programme for the WNA-2 well had originally been designed to cater for what was thought to be primarily a gas prospect and as such the oil reservoir was not able to be fully evaluated during the testing phase conducted between 6th and 30th August.
He said that this underlines the challenges with exploration work and the discovery of the unknown – this positive outcome hadn’t been anticipated. TS said that this meant, initially, that the testing team were unable to lift all of the liquids in the well to surface in an effective manner. He said, in light of this, the team performed an N2 lift which involved the injection of nitrogen into the wellbore to try and lift all fluids to the surface.
He explained that this was permitted by the Environment Agency and is a tried and tested method of lifting liquids to surface as part of oil and gas field testing and production. He said that it is a safe system of operation. TS explained that wellbore fluids were recovered at the surface with associated gas but there was not enough energy in the reservoir to recover any reservoir fluids to surface, but that fluids were tagged someway up the wellbore.
TS explained that in order to recover the fluids effectively from the wellbore, the team will need to install a suitable pump. He said that because the Environmental Agency permit did not provide for the installation of a pump, a decision was taken to temporarily suspend the operations so that the team could arrange to go back to the Environment Agency with a revised solution. He explained that the work was suspended, and the equipment was demobilised from site on 30 August 2019.
CF said that the regulatory compliance audits for the WNA-2 work had all been positive throughout both the drilling and testing phase. She said that a number of different Compliance Officers from the Environment Agency had visited the site and the office on several occasions as part of both scheduled and unplanned visits and that there had been no compliance issues to report. She also mentioned that there had been a joint audit between the Environment Agency and the Health and Safety Executive which was very positive. HC mentioned that all of the compliance assessment reports are available on the Environment Agency website 28 days after the report has been issued.