Underground Hydrogen: Unlocking a New Energy Frontier

Researchers across the globe are turning their attention to hydrogen trapped deep beneath the earth’s crust, a resource that could dramatically reshape India’s climate‑neutral ambitions. Unlike conventional production routes that rely on electricity or natural‑gas reforming, this subsurface hydrogen exists in sealed geological formations and can be tapped with drilling techniques similar to oil and gas. If commercialized, it would provide a low‑carbon feedstock for transport, steelmaking and power, addressing the looming supply gap as the world accelerates its shift away from fossil fuels.

Underground hydrogen, sometimes called ‘geological hydrogen’, accumulates in porous rock layers sealed by impermeable caprock, much like natural gas. Its origin is a blend of radiolysis—where natural radiation splits water molecules in the crust—and serpentinization, a chemical reaction between water and ultramafic rocks that releases H₂. Extraction involves conventional vertical or directional drilling, followed by pressure‑drawdown or pumping to bring the gas to the surface. Because the gas is already in a pure, dry state, it bypasses the costly water‑electrolysis step and can be directly fed into existing hydrogen pipelines after minimal purification.

The push for underground hydrogen arrives as the global market races toward a projected 530 million tonnes of demand by 2030, driven by Europe’s green‑hydrogen mandates and Asia’s industrial decarbonisation plans. While electrolyzers are scaling rapidly, they remain capital‑intensive and dependent on renewable electricity availability. Blue hydrogen, produced from natural gas with carbon capture, faces scrutiny over residual emissions. In this competitive landscape, geological hydrogen offers a potentially cheaper, carbon‑neutral alternative, prompting pilot projects in Germany, the United States, and Japan, each backed by multi‑billion‑dollar investments.

India’s energy roadmap, anchored by the National Hydrogen Energy Mission, earmarks US$5 billion for hydrogen infrastructure by 2030. Domestic oil‑and‑gas majors such as ONGC and GAIL have begun mapping basins where hydrogen signatures have been detected, notably the Cambay and Krishna‑Godavari sedimentary provinces. Start‑ups like HydrogenX are developing sensor suites to differentiate hydrogen from methane during drilling, while academic labs at IIT‑Bombay are modeling reservoir dynamics to forecast sustainable yields. If these efforts succeed, Indian steel plants in Jharkhand and heavy‑duty trucking fleets in Maharashtra could source locally produced hydrogen, slashing import bills and emissions simultaneously.

Key Highlights

• Identified and mapped viable underground hydrogen reservoirs in key Indian basins
• Extraction uses standard oil‑field drilling rigs, cutting capital costs by up to 40%
• Potential to meet 15% of India’s projected 2030 hydrogen demand, reducing import reliance
• Industrial users—steelmakers, logistics firms—stand to gain the most from domestic supply
• Commercial pilots slated for 2025, with full‑scale production expected by 2028

Real-World Impact

From now on, drilling engineers and reservoir geologists will need hydrogen‑specific training, while chemical plant managers must adapt their intake systems for a new feedstock. The logistics sector will see fleet operators evaluating hydrogen‑fuel‑cell trucks powered by locally sourced gas, and steel producers will explore direct‑reduction furnaces that consume underground hydrogen instead of coal. In parallel, software teams will build real‑time monitoring platforms to track reservoir pressure and gas composition, creating a niche market for data‑analytics services.

Why This Matters

The emergence of underground hydrogen signals a strategic pivot from energy‑intensive surface production to a subsurface supply chain that leverages existing drilling expertise. For CTOs, this means revisiting procurement strategies, integrating hydrogen‑ready retrofits into legacy plants, and investing in AI‑driven reservoir modeling to optimize yield. Developers of hydrogen infrastructure must also consider new safety standards for subsurface extraction, while policy makers can accelerate adoption by aligning licensing frameworks with oil‑field practices.

As pilot wells start delivering measurable volumes in the next two years, the race will shift from proving the science to scaling the business model. Stakeholders should watch the upcoming 2025 Indian Energy Ministry report, which will outline incentive structures for commercial underground hydrogen projects and could set the tempo for global replication.