Tullow Oil shares have fallen as much as 3.7 per cent in London trading after it announced that its Jupiter-1 exploration well has successfully encountered hydrocarbons off Sierra Leone.
Investec analyst said that the lack of a reserve number in the drilling update was "disappointing" because a lot of expectation was built into the company's shares.
The update from Tullow focused on its Jupiter project in block SL-07B-11, of which Tullow has a 20 per cent...
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