The money was seized under Section 295 of Proceeds of Crime Act 2012.
By granting the application, which was filed by the UK’s National Crime Agency (NCA), the money would be held in the custody of the court until April 5, 2016.
Mrs. Alison-Madueke was arrested and later released on bail on Friday, October 2 for alleged corruption-related offences.
Four other people were arrested along with her.
Among those arrested were Diezani’s mother, Beatrice Agama; her son, Ugonna Madueke, and a Swiss woman, Melanie Spencer.
The sum of £7,000 was seized from Agama, described in one of Alison-Madueke’s bio as a long-standing women’s leader and advocate.
Former Managing Director of the Petroleum Products Marketing Company (PPMC), Haruna Momoh, whose name was mentioned in early reports, has denied he was arrested.
British Broadcasting Corporation (BBC) correspondent, Sam Piranty, who tweeted that he saw Momoh at Charing Cross Police Station in London on Monday later posted that the man denied being there.
Mrs Alison-Madueke, 54, is daughter of the late Frederick Abiye Agama, the Ogbotom Edede of the Epie Atissa clan in Bayelsa State.
She is married to former Chief of Naval Staff, Rear Admiral Allison Amaechina Madueke.