The ones I've been to are located off the coasts of Sarawak and Brunei. I know some are managed by Shell - not too sure which ones are managed by Petronas. But if you do get a chance to fish these rigs, there's every chance of monster class gts and I've seen pictures of mega gts.
Problem there is how to stop them from getting into the rigs and bust you off. It's an interesting location and I believe the gts there love big eye jacks. We'll hook these jacks and the gts will come and tax them