Cairn Drills Another Successful Well on Mangala Field

Cairn announces the successful result of the Mangala-4 appraisal well on the Mangala oil field in northern Rajasthan in Block RJ-ON-90/1 in India.

Mangala-4 was drilled 1.75km up-dip from Mangala-2 and 1.5km from the Mangala-1 discovery well. The well encountered 110 net metres of excellent high quality oil bearing Fatehgarh sands. The oil down-to in the Mangala-4 well is consistent with the oil water contact determined from pressure readings in other Mangala wells.

For field development planning purposes, a seven-day interference test was conducted between Mangala-1 and Mangala-4 to assess vertical reservoir continuity and lateral connectivity between the two wells. Oil from an eleven meter perforated interval in Mangala-1 was produced for seven days and the pressure disturbance measured in sands over a gross 50-meter interval within Mangala-4. The result successfully established both vertical reservoir continuity and lateral connectivity between the two locations. Further interference testing on future appraisal wells will also be required to determine connectivity across the field for development purposes.

Additional Appraisal Activity

Wells Mangala-5 and Mangala-6, which will each be drilled in crestal locations between Mangala-1 and Mangala-3, are now expected to spud in early June.

Bill Gammell, Chief Executive, commented:

"Proof of both vertical reservoir continuity and lateral connectivity over 1.5 km reinforces our confidence for the future Mangala development."

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