Marcel Chin-A-Lien
Global Petroleum & Energy Advisor
February 2026
Commentary / Perspective — Subsurface Geology & Practical Implementation
Abstract
Willemijn van Rooijen’s 2026 doctoral Ph.D. thesis on Underground Hydrogen Storage (UHS) presents a rigorous multiscale synthesis, integrating molecular simulations, pore-scale hydrodynamics, laboratory experimentation, and a structured site-selection framework.
W.A. Van Rooijen, Understanding Underground Hydrogen Storage Across Scales: Numerical Simulations, Experiments, and Site Selection. Ph.D. 24th February 2026, TU Delft.
My commentary reflects on the translation of such controlled scientific insights into the heterogeneous and operationally mature Dutch subsurface.
While porous media storage in depleted gas fields offers substantial capacity, field-scale geological uncertainties—heterogeneity, fault-seal behavior, legacy penetrations, and subsurface interaction pathways— can dominate over laboratory-scale physics.
Zechstein salt structures in the Noordoost Netherlands provide a more deterministic geological containment model, shifting primary uncertainty toward geomechanics under cycling.
The thesis is therefore interpreted as enabling scientific architecture for screening and sequencing, rather than prescribing universally optimal storage classes independent of local geology.
1. Context and Scientific Merit
Underground hydrogen storage presents a complex multiscale challenge spanning thermophysical properties, multiphase flow, geomechanics, and biogeochemistry.
Van Rooijen’s work is commendable for integrating these domains coherently.
The thesis does not oversimplify UHS; rather, it recognises that storage performance depends on the coupling of reservoir behavior, containment integrity, and subsurface interaction processes.
The value of this contribution lies in its architectural structure—linking mechanisms across scales.
The practical question, however, becomes one of translation: at what point do geological complexity and scale effects dominate laboratory-derived behavior?
2. Scale Reconciliation in the Dutch Subsurface
2.1 Porous Media: Capacity with Complexity
Depleted Dutch gas fields provide significant volumetric opportunity and benefit from proven structural containment.
Yet geological reality introduces heterogeneity, layered permeability, fault segmentation, and historical pressure effects.
These elements can influence sweep efficiency, working gas recovery, and deliverability under cycling.
Laboratory insights into wettability and trapping mechanisms are scientifically valid and mechanistically informative. However, they must be calibrated against field-scale behavior rather than applied as invariant parameters.
2.2 Zechstein Salt Structures: Deterministic Containment
Zechstein salt systems in the Noordoost Netherlands represent a fundamentally different storage class. Containment is intrinsic to the rock mass, and multiphase porous-media uncertainties are largely removed from the primary risk stack.
The dominant geological variable becomes cavern geomechanics under pressure cycling—a complex but comparatively well-characterised domain in Dutch subsurface practice.
For early implementation and buffering-oriented storage services, this geological determinism significantly reduces the uncertainty stack.
3. Practical Sequencing
A conservative application of van Rooijen’s framework to Dutch geology suggests disciplined sequencing:
- Initial emphasis on Zechstein salt caverns for buffering and reliability.
- Subsequent expansion into carefully selected depleted gas fields once site-specific uncertainties are rigorously bounded.
- Explicit calibration of laboratory-derived parameters against field data.
The thesis enables this structured decision-making approach.
Its strength lies not in prescribing a location, but in structuring subsurface risk.
Conclusion
Multiscale scientific integration is essential for underground hydrogen storage.
Van Rooijen (2026) provides an important framework for evaluating geological suitability.
In the Netherlands, geological realism supports starting where containment is most deterministic and expanding only where field evidence confirms robustness.
About the Author — Marcel Chin-A-Lien
Global Petroleum and Energy Advisor
48 Years of Transformative Expertise | Exploration, Giant Field Discovery, Business Development, M&A, PSC Design, Contract Strategy
Marcel Chin-A-Lien brings nearly five decades of global experience at the highest levels of the energy sector, where technical depth meets commercial strategy. His career includes multi-billion-dollar giant field discoveries, leadership in early capitalist upstream ventures in the former USSR, successful offshore bid round structuring, and long-term production cash flow development across mature and frontier basins, including the Dutch North Sea.
A rare integration of technical, commercial, and managerial capability, he holds four postgraduate petroleum degrees spanning geology, engineering, international business, and management—positioning him uniquely at the intersection of exploration strategy, M&A, PSC design, and fiscal negotiation.
Fluent in seven languages and experienced across Europe, Asia, Africa, and the Americas, Marcel advises governments, national oil companies, and international operators on basin entry, fiscal regime optimization, asset valuation, and integrated technical-commercial due diligence.
Credentials and Distinctions
- Drs – Petroleum Geology
- Engineering Geologist – Petroleum Geology
- Executive MBA – International Business, Petroleum, M&A
- MSc – International Management, Petroleum
- Energy Negotiator – Association of International Energy Negotiators (AIEN)
- Certified Petroleum Geologist #5201 – AAPG
- Chartered European Geologist #92 – EFG
- Cambridge Award – “2000 Outstanding Scientists of the 20th Century”
- Paris Awards – “Innovative New Business Projects”, GDF-Suez (2× Gold Awards, 2003)
Strategic Expertise
- Exploration Strategy & Giant Field Discovery
- Upstream M&A and Asset Valuation
- Production Sharing Contract (PSC) Design & Fiscal Optimization
- Government and IOC Negotiation Advisory
- Bid Round Structuring and Evaluation
- Integrated Technical-Commercial Due Diligence
For advisory engagement at the nexus of technical excellence, commercial clarity, and geopolitical understanding:
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Email: marcelchinalien@gmail.com
