microbes
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This study reviews subsurface microbial activity, biomineralization reactions, and mechanisms prevalent for bioremediating wells, stabilizing cements, and increasing trapping during CO₂ injection and storage.
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Gold H2 says it is the first to achieve commercial-scale hydrogen production by introducing microbes to a mature oil reservoir.
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Cemvita and ChampionX are launching a pilot project next year to turn an old oil field into one that may yield tons of hydrogen each day.