The key figures in the article are these:
22.5 billion dollars or more (here more means the price is going to go up when the deal is actually signed) for 15 years to import 3 million tons of LNG.
Each ton of LNG is about 50 MMBTU. So in effect under this deal, the price of gas is 10 dollars per MMBTU. This is the price of LNG, the transportation cost by LNG tankers and the re-gasification cost will add another 2 or 3 dollars per MMBTU at the very minimum to the final cost. If the oil goes to 100 you will end up paying over 20 dollars per MMBTU excluding transportation and re-gasification costs. And since the deal is going to be for 15 years you will face international court of arbitration and heavy fines if you try to abandon it for example 3 years down the road.
Compare it with IP, which was set at 11 dollars per MMBTU when oil was at 100 dollars a barrel including the cost of pipeline transport. At 40 dollars a barrel of oil, the IP gas would have cost 4.4 dollars per MMBTU including the cost of transport.
This Qatar LNG gas will be about 3 times more expensive than IP.