Press reports suggest Murphy has acquired a 5% stake from PetroVietnam in block 15-1/05, 3,075 sq km in the Cuu Long Basin. This is presumably an extra 5%, as Murphy already had 35% in the permit. Partnership therefore remains PetroVietnam (op), partners Murphy + SK Innovation. 
Vietnam (Cuu Long B.) (It's a petroleum rights. Please summarize by yourself). In IHS database: Block 15-1/05 op. by PETROVIET (40.0%, MURPHY 35.0%, SK HOLD 25.0%) to be check.