Valiant Petroleum said it would post the scheme document to shareholders on Tuesday and make it available online after the court approval was given on Monday.
Backed by both boards, the takeover would see Valiant shareholders receive 307 pence in cash and 1.33 Ithaca shares, or a total of 4.75 per Valiant share.
London- and Toronto-listed Ithaca Energy stands to gain a number of additional interests in the UK and Norway through the takeover, including a stake in the Norvarg gas discovery in the Barents Sea.
The explorer said the deal will see it double its production forecast for this year to between 14,000 and 16,000 barrels of oil equivalent per day.
Subject to approvals, the deal is expected to close by 19 April.