Abstract:
Objective To serve the national energy transformation strategy and address the bottleneck of green hydrogen development in regions rich in wind and solar resources, such as Xinjiang, where pure water is scarce, this study explores the use of produced water from oil and gas fields for green hydrogen production. The goal is to simultaneously promote unconventional water resource utilization and clean energy development, thereby supporting the transformation of oil and gas enterprises into comprehensive energy companies.
Methods Based on stability tests conducted at the oilfield site, a cost model was constructed using techno-economic analysis. The levelized cost of hydrogen was then compared with that of conventional water electrolysis to verify the economic viability of the proposed approach.
Results The proposed clean-energy-driven gas field water electrolysis pathway is feasible for large-scale application. The cost of gas field water treatment is reduced by 53% compared with traditional treatment and reinjection. The hydrogen production cost is lower than that of alkaline water electrolysis over a wide range of electricity prices (0.05-0.60 yuan/kWh), and approaches that of natural gas-based hydrogen production at an electricity price of 0.2 yuan/kWh.
Conclusion The "clean energy + gas field water" hydrogen production pathway demonstrates excellent techno-economic feasibility, effectively transforming environmental burdens into resources and providing a carbon reduction solution for arid regions through electricity-water-hydrogen synergy. This model not only aligns with the "dual carbon" goals and the cultivation of new quality productive forces in the hydrogen energy, but also provides a replicable technological paradigm for promoting clean energy transitions in regions with similar resource endowments.
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