Royal Dutch Shell PLC has agreed to acquire 50% stake each in Chevron Trinidad and Tobago Resources SRL (CTTR) and Trinling Limited from Chevron Corporation for approximately $250m.

CTTR will be acquired by Bg International Limited, while Trinling will be bought by BG Gas International Holdings BV.

CTTR holds 50% non-operated working interest in Block E, Block 5(a) and Block 6, which include Dolphin, Dolphin Deep and Starfish natural gasfields located in the East Coast Marine area in offshore Trinidad. CTTR also owns 50% operating interest in the ten trillion cubic feet Loran Manatee gasfield in Block 6(d).

Scheduled for completion by mid-2017, the transaction will allow Shell to extend its oil and gas operations in Trinidad and Tobago.

Ensco plc has agreed to acquire Atwood Oceanics Inc for a consideration of approximately $863m.

"Ensco's shares will be transferred to the shareholders of Atwood Oceanics at a ratio of 1.6:1 as part of the agreement."

Ensco's shares will be transferred to the shareholders of Atwood Oceanics at a ratio of 1.6:1 as part of the agreement.

Atwood Oceanics owns nine mobile offshore drilling units, six ultra-deepwater floaters and five high-specification jack-ups, as well as having two ultra-deepwater drillships under construction. Ensco will own a fleet of 63 rigs upon completion of the acquisition.

Ensco has appointed Morgan Stanley & Co LLC, DnB Markets, Inc, and HSBC Securities (USA) Inc as financial advisors, and Latham & Watkins LLP as legal advisor for the transaction.

Scheduled for completion in Q3 2017, the transaction will allow Ensco to expand its operations to deep and shallow-water markets across six continents.