DUBAI, Dec 28 (Reuters) - Saudi Arabia's PetroRabigh 2380.SE has chosen HSBC Saudi Arabia as a financial adviser for a 9.26 billion riyal ($2.47 billion) rights issue to fund its expansion, the company said on Wednesday.

PetroRabigh, a joint venture between Saudi Aramco and Sumitomo Chemical, said in a bourse statement that HSBC Saudi Arabia would execute the rights issue "effective December 22, 2016."

The statement said further details would be disclosed in "due course".

($1 = 3.7507 riyals)

(Reporting by Alexander Cornwell; Writing by Tom Finn; Editing by Mark Potter) ((Tom.Finn@thomsonreuters.com;))