Cobalt International Energy has agreed to divest its stake in the Heidelberg field located in the Gulf of Mexico, US, to W&T Offshore.

The Heidelberg field lies in 5,300ft of water in the Green Canyon area, 140 miles (225.3km) south of Port Fourchon offshore Louisiana.

The deal covers Cobalt International’s 9.37% stake in each of the Green Canyon 859, 903 and 904 blocks of the Heidelberg field.

Both Cobalt International Energy and W&T Offshore are oil and gas companies based in the US.

The deal will strengthen W&T Offshore’s oil and gas assets portfolio in the Gulf of Mexico.

Norwegian oil exploration and production company Aker has agreed to raise $500m through the private placement of senior notes. The interest on the notes is payable semi-annually.

The company plans to use the proceeds to repay its debt and fund the expenses of the offering.

Eni has agreed to divest its 10% stake in the Shorouk Concession to Mubadala Petroleum for $934m.

The Shorouk Concession contains the Zohr gas field located in 4,921.3ft of water, 190km north of Port Said in the Mediterranean Sea, Egypt.

The existing partners in the concession are Eni (60%, operator), Rosneft Oil Co (30%) and BP (10%), which will change to Eni (50%, operator), Rosneft (30%), BP (10%) and Mubadala Petroleum (10%), following the transaction.

Eni is executing the transaction through its wholly owned subsidiary IEOC Production.

Based in Italy, Eni is an oil and gas company, while Mubadala Petroleum is a UAE-based upstream oil and gas exploration and production company and a subsidiary of US-based investment company, Mubadala Investment Company.

The deal is expected to strengthen Mubadala Petroleum’s oil and gas properties in Egypt.

“Eni has agreed to divest its 10% stake in the Shorouk Concession to Mubadala Petroleum for $934m.”

Woodside Petroleum has signed a deal with BHP Billiton to take over as the operator of the Scarborough gas field located offshore Australia.

Woodside previously acquired 50% stake in the Scarborough gas field from ExxonMobil and currently owns 75% interest in the field.

Based in Australia, Woodside Petroleum is a petroleum exploration and production company, while BHP Billiton Group, also based in Australia, is involved in the discovery, acquisition, and development of natural resources worldwide.

The deal is expected to be closed by the end of Q1 2018.

Awilco Drilling has awarded a contract worth $425m to Keppel FELS, a subsidiary of Keppel Offshore & Marine, to construct a mid-water semi-submersible drilling rig.

The rig will be similar to CS60 ECO MW in design and is expected to be configured for operations in water depths of 1,500m. It is expected to be completed by Q1 2021.

Based in the UK, Awilco is a drilling contractor, while Keppel Offshore & Marine is a Singapore-based company involved in the provision of offshore rig design, construction and repair services.

Brazilian oil and gas company Petroleo Brasileiro (Petrobras) plans to divest its 100% stake in the Piranema and Piranema Sul fields located offshore Brazil in the Sergipe-Alagoas Basin.

The Piranema field lies in water depths of 200m to 2,000m, while the Piranema Sul field lies in water depths of 550m to 1,600m.

US-based offshore energy services company Helix Energy Solutions Group plans to raise $125m through a public offering of 4.125% convertible senior notes.

The notes are due September 2023 and will be convertible into common shares of the company at a price of $9.47 a share.

The joint book-running managers for the placement are Wells Fargo Securities and Merrill Lynch, Pierce, Fenner & Smith, while Baker Botts is the legal advisor.

The proceeds will be used to repurchase the outstanding 3.25% convertible senior notes worth $60.115m that are due 2032, and to repay debts.