Completion operations have recommenced at Arrowsmith -2 following the temporary suspension of the evaluation program announced on 10th September.

The program has been modified to complete the well at 2645m.

The revised plan will not compromise the objectives of the original evaluation program, however will delay determining the full potential of the High Cliff Sandstone (HCSS) until the Irwin River Coal Measures and Carynginia zones are sufficiently cleaned up.

Under the original program once testing of the HCSS was complete, co-mingled flow from the three formations was to be used to assist in cleaning up the remaining injected fluids from the Carynginia and Irwin River Coal Measures, which remains the case. Production logging tools will be used to evaluate the contribution from each zone at various times during flow-back.

This co-mingled flow approach has been successfully demonstrated by a number of other operators on unconventional (vertical) well evaluation programs.

Tags: Norwest Energy NL