Have a look at this pages 3&4 especialy.
http://stocknessmonster.com/news-item?S=MEO&E=ASX&N=328285
If MEO hit the gas all Chevron has to do extend there feed lines into the Artemis deposit or tie it back Chevron's platform. If they don't want it they could tie it back to woodside's platform. I'm sure there would be a bidding duel either way by these two if there's 12 tcf of gas on offer