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Home Home - Interviews
Hydrogen

Promiscuous by Nature, Challenges of Capturing Hydrogen Underground, Interview with Douglas Wicks

Arnes BiogradlijaBy Arnes Biogradlija13/01/20254 Mins Read
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Natural hydrogen exploration is at a crossroads reminiscent of the early oil and gas wildcatting days. Despite advancements in geological sciences, hydrogen exploration remains fraught with uncertainties.

WATCH THE FULL INTERVIEW

Current practices often hinge on assumptions, leading to a hit-or-miss approach. The inherent characteristics of hydrogen, particularly its propensity to diffuse and react with various materials, further complicate efforts to locate and quantify reserves.

Unlike oil, hydrogen exploration lacks established methodologies for reliably assessing resource size and flow potential, as in the fracking revolution, where geophysicists and modelers defined resource potential, so natural hydrogen must overcome similar barriers to attract substantial investment. Financing remains a formidable challenge without models demonstrating a field’s long-term viability. This constraint underscores the critical need for robust data collection and predictive models to de-risk investment decisions.

The Gaps in Knowledge and Technology

Understanding natural hydrogen’s formation and recharge mechanisms remains an unresolved scientific endeavor. Hydrogen’s sources—whether through serpentinization, radiolysis, or deep Earth processes—carry unique implications for exploration strategies. While estimates, such as the U.S. Geological Survey’s calculation of 6,000 billion tons of hydrogen in underground reserves, provide a tantalizing glimpse into potential, they offer little clarity on commercial viability.

Serpentinization, involving the oxidation of iron compounds, represents a particularly promising avenue. Unlike primordial hydrogen or radiolysis, this process is amenable to engineering interventions, offering opportunities to enhance reaction rates and resource recovery. However, the technical challenges of stimulating subsurface reactions, maintaining equilibrium conditions, and managing byproducts like water and dissolved minerals complicate the path to commercialization.

Technological and Financial Barriers

The extraction of hydrogen trapped in complex rock formations introduces a new set of engineering challenges. Traditional oil and gas drilling techniques optimized for softer sedimentary formations are less effective in mining-style operations required for hydrogen. Enhanced geothermal drilling and advanced reservoir management techniques may offer partial solutions, but significant adaptation is necessary.

Separation and transport of hydrogen from mixed fluids—often under high pressure and containing significant water volumes—are other critical hurdles. Current techniques for handling such mixtures are neither efficient nor cost-effective at scale. Technological advances to isolate hydrogen without bringing excessive water to the surface could unlock significant progress.

The Role of Geological Data and Modeling

High-resolution seismic, gravitational, and magnetic data have traditionally been instrumental in oil and gas exploration, and their adaptation for hydrogen presents new opportunities. However, differentiating hydrogen from other gases in subsurface formations remains complex. Hydrogen’s reactivity—dubbed “promiscuity” by experts—further muddles the detection and quantification processes. Geophysical tools must evolve to identify and monitor these elusive reservoirs accurately.

Additionally, interdisciplinary approaches integrating mining geology, oil and gas techniques, and advanced sensors such as quantum magnetometers are crucial. Artificial intelligence and machine learning, leveraging vast datasets from varied domains, could expedite the development of accurate hydrogen migration and accumulation models.

The Economic Landscape and Path Forward

Commercialization hinges on resource assessment models capable of demonstrating sustainable production over a 15-year timeframe—a benchmark often required by investors. Though promising, current efforts within the private sector are mainly opaque, driven by competitive pressures. Public-sector funding and collaborative partnerships are essential to building shared knowledge and validating exploration models.

Early oil and gas industry analogs highlight the importance of public investment in foundational research. Dry holes, often viewed as failures, provide critical data to refine models and guide future exploration. Publicly funded drilling campaigns, combined with private-sector expertise, could accelerate the maturation of this nascent field.

Toward a Viable Energy Future

Natural hydrogen represents a unique opportunity as a primary energy source that could circumvent the energy penalties associated with hydrogen production via electrolysis or steam methane reforming. With cost estimates for natural hydrogen production potentially reaching as low as $1 per kilogram, the economic case is compelling, particularly in markets like Europe and Japan, where natural gas prices are high.

Realizing this potential requires addressing technical, financial, and regulatory challenges. Engineering innovations to stimulate subsurface reactions and advanced monitoring systems could pave the way for efficient and sustainable production. Moreover, integrating diverse disciplines and fostering open collaboration between public and private entities will be critical to unlocking natural hydrogen’s full potential.

The future of natural hydrogen lies in building on these foundations. By embracing innovation and rigorous scientific inquiry, the energy sector can chart a healthier, more sustainable future driven by resources hidden beneath our feet.

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