7. Conclusion

Of the world's 70 Tm ³ of reserves, half are estimated to lie at depths of more than 200 m and more than 250 km from the coast .

IOCs (International Oil Companies) exploit both gas and oil reserves. Recently, we've even seen the takeover of historic gas companies by oil companies: BG (ex-British Gas) bought by Shell, but also the announcement that Engie (ex-GDF-Suez) is abandoning its exploration and production business.

However, in terms of total fossil fuel production, offshore gas plays...