Gold Hydrogen (ASX:GHY) is set to start a flow test program at the Ramsay project in South Australia, with equipment mobilization scheduled for late May and flow testing operations scheduled to start by late June, according to a Tuesday Australian bourse filing.

The company said the flow test campaign will undertake separate zonal testing of discrete natural hydrogen and helium-bearing formations, following subsurface indicators, including soil gas results of up to 2,160 parts per million natural hydrogen, about 4,000 times atmospheric background, across the Ramsay project area.

Phase one fluid inclusion studies across the company's high-grade exclusive application areas support the presence of regionally extensive natural hydrogen and helium generation systems across Gold Hydrogen's 77,292-square-kilometer tenement portfolio, the filing added.

In parallel with the flow test program, the company is working with Worley (ASX:WOR) to assess early development, including the potential to fast-track a helium development at Ramsay to supply the Australian domestic market and enhance Australia's sovereign helium capability, it added.

The company's shares fell 1% in recent Tuesday trade.