Algeria’s gas sector had an incredible 2021. After years of falls, sales gas output topped 100bcm for the first time ever and exports grew to an 11-year high. The question now is whether it can keep it up. Natural decline at aging fields and growing domestic demand are key concerns, but several planned projects could yet prove decisive.

By mid-2021 it was apparent that Algeria, a key supplier of gas to Europe, was set for a good year in terms of sales gas output. The question was how...