Episode Summary
Executive Summary: The episode examines geologic hydrogen: naturally occurring hydrogen created by water-rock reactions underground. Host Shail Khan and Coloma CEO Pete Johnson discuss why it could be a major new source of primary energy, its technical hurdles (trapping, leakage, microbes, and geography), the early state of evidence, and why the sector is promising but still far from commercial proof.
Main Topics: What geologic hydrogen is and how it forms (Priority: 5/5): Johnson explains that hydrogen can be generated naturally underground through serpentinization, where water reacts with iron-rich rock and releases hydrogen as an exothermic process. Why geologic hydrogen could matter for decarbonization (Priority: 5/5): If recoverable at scale, geologic hydrogen could supply cheap, low-carbon primary energy for hard-to-abate sectors like ammonia, steel, aviation fuel, and shipping. Technical challenges: seals, migration, and microbial loss (Priority: 5/5): Compared with oil and gas, hydrogen is harder to trap because it is smaller, can escape through fractures more easily, and can be consumed by microbes, creating preservation risk. Leakage and climate impact (Priority: 4/5): The conversation addresses hydrogen leakage as an indirect climate concern, but argues existing hydrogen infrastructure suggests leakage can be managed at relatively low rates. Location and infrastructure economics (Priority: 4/5): Unlike oil and gas, the best hydrogen resources may pull downstream industry toward the resource, especially if production costs are low enough to outweigh transport costs. What is publicly known today (Priority: 5/5): Public evidence for large, commercially tappable reservoirs remains sparse, though seeps, flow tests, and a few notable wells in Mali and Australia indicate the concept is real. Exploration vs. engineered production (Priority: 3/5): Beyond searching for natural deposits, the team is also studying whether water-rock reactions can be stimulated in the subsurface, though economics remain uncertain.
Key Arguments: Geologic hydrogen is real in principle because water reacting with iron-rich rock can generate hydrogen naturally underground. The key debate is not whether hydrogen forms, but whether it accumulates in commercially meaningful reservoirs with adequate traps and seals. Hydrogen could be a major decarbonization breakthrough because it would be primary energy, not an energy carrier requiring large conversion losses. If cost-competitive, geologic hydrogen could undercut green hydrogen and fossil-based hydrogen for ammonia, SAF, and industrial heat. Hydrogen is harder to store than oil and gas because it is a smaller molecule, needs tighter seals, and is vulnerable to microbial consumption. Leakage matters, but existing hydrogen pipelines, wells, and storage indicate the industry already knows how to manage hydrogen reasonably well. The likely path to commercialization is slow exploration, appraisal drilling, and third-party reserve certification rather than quick hype-driven scale-up. Infrastructure may follow the resource if the delivered hydrogen price is low enough, similar to how industry grew around oil finds or cheap Quebec hydropower. Engineered hydrogen generation in the subsurface is scientifically plausible, but the commercial economics are still unproven. The sector should be treated as highly promising but early; expectations about timing must remain cautious.
Data Points: North American devices shifted during peak periods: 2.5 million customer devices - Energy Hub example of virtual power plant capacity Dispatchable capacity from customer devices: 3.4 gigawatts - Energy Hub's VPP platform capacity Equivalent grid capacity: more than three nuclear reactors - Host's ad read describing 3.4 GW of flexible capacity Hydrogen energy content per metric ton: 33 megawatt hours - Used to compare hydrogen production pathways Electrolysis input energy: 50 to 55 megawatt hours per ton - Energy required to make one ton of hydrogen from renewable electricity Electrolysis efficiency: about 60% - Implied best-case efficiency for green hydrogen production Natural gas input energy for hydrogen production: roughly 40 megawatt hours thermal - Comparison pathway for making one ton of hydrogen Natural hydrogen extraction parasitic energy: 1 to 3 megawatt hours per ton - Estimated energy cost to compress, pump, and purify natural hydrogen Hydrogen pipelines in the U.S.: 1,600 miles - Evidence that hydrogen infrastructure and operations are not new Hydrogen loss from wellhead to customer: about 0.25% for best performers; around 1% bottom quartile - Industrial gas sector leakage performance Assumed methane loss benchmark: 2% - California CARB assumption used for comparison Emissions reduction estimate: 97% reduction in total greenhouse gas emissions - Illustrative comparison of 2% methane loss versus 2% hydrogen loss in power generation Earth's crust potentially favorable rock: 10% mafic rock - Publicly discussed estimate of resource potential USGS resource estimate: trillions of tons - Broad public estimate of possible geologic hydrogen resource size Historical hydrogen well in Mali: 1987 - Water well in Mali that struck hydrogen and has produced ever since Hydrogen use case in Mali: enough to power a village - Illustrates small-scale proven production Company activity footprint: over 10 states - Coloma's active exploration footprint, as described by Johnson Number of companies in the sector: 50 to 60 companies - Johnson's estimate of current activity across geologic hydrogen exploration Estimated production for liquid hydrogen economics: 10,000 tons per year - Approximate scale cited as meaningful for liquid hydrogen development Estimated production for ammonia economics: 50,000 tons per year - Approximate hydrogen volume cited for ammonia facilities Engineered well cost example: $5 million to $10 million - Illustrative capital cost for a stimulated subsurface hydrogen system Required annual hydrogen value for return: about $5 million per year - Target annual output needed to justify a $10 million system Time scale for hydrogen reservoirs: thousands to hundreds of thousands of years - Johnson contrasts hydrogen formation with oil and gas over millions of years
Pivotal Quotes: "If we can find large price-advantaged geologic hydrogen reserves, the infrastructure will come to the hydrogen." — Pete Johnson: On why favorable resource economics could reshape industrial siting and infrastructure "This is one of the most interesting experiments being run in all of energy transition." — Pete Johnson: On the sector's significance despite early-stage uncertainty "I think managing expectations around timing and how hard this is going to be and how much work this is going to be is really important." — Pete Johnson: On avoiding overhyping the technology before commercial proof
Implications: Geologic hydrogen could become a transformative low-carbon primary energy source, but commercial success depends on proving reserves, flow rates, and economics through patient exploration and appraisal. The industry should watch closely, but not expect near-term scale.