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Workover Operations on Well-12 Suspended

Source: www.gulfoilandgas.com 11/3/2011, Location: Asia

Matra Petroleum has announced an update on its operations and plans in the Sokolovskoe field, Russia where Matra has a 100% interest.

Well-12

Workover operations on Well-12 have been suspended following preliminary works to establish the viability of a cement squeeze to shut-off water flow. The operation successfully established liquid flow outside the liner, however, after a short period the flow path became plugged, preventing further circulation.

After acidisation, Well-12 had flowed oil at rates in excess of 1,000 bopd on clean-up with nitrogen but a subsequent mechanical failure appears to have occurred due to excessive pressure drawdown at the end of that operation. A decision has been taken to suspend Well-12 at this time.

Managing Director, Peter Hind commented:

'It was encouraging that Well-12, showed oil flow rates in excess of 1,000 bopd on clean-up with nitrogen. However, remedial cementation is always a difficult operation, made more complicated in this case being a side-track and because of the proximity of the original hole that was drilled below the oil-water-contact. The establishment of fluid circulation outside the liner is further support for the conclusion that water has been flowing outside the liner from the higher Franski zone, located above the target Aphonenski oil reservoir.

Well-12 was originally drilled as an exploration well rather than a production well and, reassuringly, on two occasions it has demonstrated excellent productivity even though it is in a non-optimal field location being located towards the flank of the field.

Although we will not continue with remedial operations on Well-12, we have every confidence in the overall potential of the Sokolovskoe oilfield. The productivity of Well-12 also bodes well for future field development as we look forward to receiving approvals to drill Well-14 in the near future.'

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