- Services engaged including coiled tubing, nitrogen and testing services to acidise
and flow test the IMIC-1 well. Program start date expected within 4 weeks and
duration 9 days. The majority of the services are available in Romania thereby
minimising potential delays due to COVID-19 related border restrictions.
- Decision to proceed based on recently recovered down hole pressure
measurements which confirm non depleted reservoir pressure and gradual influx of
reservoir fluids from down hole sampling which has recovered methane and drilling
- Program objectives to initiate flow by overcoming expected well bore damage which
has been interpreted as preventing material flow from the well, determine reservoir
fluid composition and the flow capacity of the PA IV reservoir.
- Program Cost is approximately Euro 230,000 including VAT and 10% contingency.
- Expected benefits of acidisation are the stimulation of the well in order to create
flow paths for gas beyond the mud filter cake and drilling induced reservoir damage
built up around the well bore while drilling and possible invasion into the reservoir.
Acidisation is a very common practice for such reservoirs in Western Romania where
over 20% of the reservoir is analysed from drilling cuttings to consist of calcite and
siderite cement that can be dissolved by acid thereby enhancing near well bore
- Further program updates will be announced when acidisation and testing
equipment is mobilised to site.
ADX Energy Ltd (ADX) advises that it has commenced contracting the necessary services to undertake acidisation and flow testing the Iecea Mica-1 (IMIC-1) in Iecea Mare Production License onshore Romania.
The decision to commence acidisation and testing has been taken by ADX and Reabold
Resources PLC on behalf of Danube Petroleum Limited (Danube) see Note 2 based on the results of down hole pressure measurements and down hole fluid sampling data in conjunction with the data obtained during the drilling of the well, rock typing analysis using drilling cuttings as well as data from a nearby historic well.
Recently acquired down hole pressure data has confirmed pressure build up to initial reservoir pressure of approximately 210 bars (3046 Psi) in PA IV reservoir. Previously acquired samples of methane gas have been recovered from down hole sampling which recovered methane gas and drilling fluids from the reservoir. The recovery of drilling fluids from down hole samples is a further indication of well bore damage.
The objectives of the acidisation and testing program are to initiate flow by overcoming expected well bore damage which has been interpreted as preventing flow from the well, determine reservoir fluid composition and the flow capacity of the PA IV reservoir. (It should be noted that the PA IV reservoir has porosities in the order of 20%, based on petrophysical logs, and good indications of permeability from rock typing work and should not be regarded as a tight reservoir play per se).
Contracting of services and mobilisation of equipment is expected to take approximately 4 weeks and the program duration is expected to be 9 days. The approximate cost of the program is Euro 230,000 including VAT and 10% contingency.
ADX will contract and mobilise all the necessary acidisation equipment including a coiled tubing unit, nitrogen equipment and acid in Romania to stimulate the well and test it. The injection of acid into the reservoir is intended to create flow paths for reservoir gas beyond the mud filter
cake built up around the well bore while drilling and possible invasion damage into the reservoir. Acidisation is common practice for such reservoirs in Romania. Laboratory testing undertaken
on behalf of ADX indicates that over 20% of the reservoir calcite and siderite cement can be
dissolved by acid thereby enhancing near well bore permeability.
Ongoing operational updates will be provided to shareholders over the coming weeks leading up to acidisation and testing operations.