Industry sources tipped Micoperi as a frontrunner for the job but said clarifications were still ongoing and a letter of intent has yet to be issued.
An engineering, procurement, construction and installation contract, which will cover modifications to all five of the field's platforms, was due to be awarded in June.
A source said a number of factors lie behind the delay including Serept's relative inexperience in handling such a major project allied to the fact it is a "complex reimbursable contract".
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