Interesting Captain, well done, Although I have to disagree about LNG composition and prices, because a richer cargo , with a higher content of heavier hydrocarbons (like Arzew), it's of higher heating value than a leaner cargo (like Kenai), therefore provides more energy (MMBTU) per m3 than a leaner cargo. So rich LNG is generally more expensive than lean LNG cargoes.
Thanks 🙏 This I will never understand hh, how more percentage of methane (higher calorific value) is less calorific value compared to more percentage of heavy components (less calorific value).