Santos (ASX:STO), Beach Energy (ASX:BPT), and Amplitude Energy (ASX:AEL) are likely to be negatively impacted by the Australian government's domestic gas reservation system plans, MST Marquee analyst Saul Kavonic said in a research note, according to the Australian Financial Review's Wednesday report.

If the planned system push down gas prices, Beach Energy, Amplitude Energy, and those with gas available in the period 2027 to 2028 would be the most affected if revenue and new projects take a hit from lower prices, the report said, citing Kavonic.

In addition, Santos' valuation could be impacted by up to AU$0.20 per share if the company's Gladstone liquefied natural gas project in Queensland is forced to help maintain supply in the east coast domestic market once the reservation system is implemented, the report said.

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