From RNS 30/09/2012 Nov 2020 16:46
Available gas reserves and the La-108 intervention:
With effect of 1 January 2020, the Group has revised the Logbaba proved developed reserves ("1P") from 69 Bcf to 19 Bcf. The successful completion of the La-108 intervention, the funding of which is dependent on the recovery of amounts owed to GDC by ENEO, or by alternative funding arrangements, is fundamental to GDC's ability to recover the revised 1P Reserves and its continuing ability to provide gas to customers. As with any such operation, the outcome of the La-108 intervention has typical geological and operational uncertainty. Should the outcome be at the lower end of expectations, this would shorten the life of the Logbaba Field. The Group is actively pursuing other sources of gas to mitigate this risk.
Today's RNS:
Following the perforation of 2 of the sand intervals in the Upper Logbaba formation, an initial clean-up flow test was commenced on 11 November 2020...
The well was opened up on a 16/64" choke and was beaned up to 32/64", and as of 5 p.m. GMT yesterday was flowing approximately 19 MMscf/d with a Flowing Well Head Pressure (FWHP) of 3,580 psig. The full potential of the well is highly likely to exceed the capacity of the plant, which is 20 MMscf/d....
six sets of perforations were shot across a total estimated gross pay interval of 86m. The well was opened up on 11 November 2020 to a flare and achieved a flowrate of just under 20 MMscf/d with a FWHP of 3,580 psig on a 32/64" choke. The theoretical AOF (Absolute Open Flow) potential of La-108 is estimated to be 50 MMscf/d (though this is to be confirmed following analysis of all the test data). In addition, four more Upper Logbaba sands in La-108 remain available for perforation in the future, as required by production. ...what is an over-pressured reservoir...
'Lastly, we are extremely pleased to have safely remediated La-108 and to have tested it at excellent flowrates.'