Drilling Track: Rigs, Well Control and Geothermal · Module 4 of 4 · about 15 min
Where drilling is headed: geothermal
Oil and gas skills transfer straight into geothermal. Geothermal wells use the same kind of rigs, mud and crews, but they target hot rock instead of hydrocarbons and handle much higher temperatures.
Conventional geothermal needs hot rock, water and natural permeability in the same place, which is rare. Enhanced geothermal systems (EGS) create permeability by injecting fluid to open fractures in hot rock, then circulating water through it. That could make geothermal possible in many more places.
The U.S. Department of Energy runs a field lab for this called Utah FORGE, near Milford, Utah, where teams test EGS drilling and stimulation in hot granite. Its work includes long horizontal wells and multi-stage stimulation borrowed from shale drilling.
For a driller, the practical changes are heat and hard rock. Hot formations wear out bits, electronics and seals, and granite drills much slower than sedimentary rock. That is why polycrystalline diamond (PDC) bits, cooling the mud and planning for tool limits matter on these jobs.
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Module quiz
5 questions, 4 correct to pass. You'll see what you missed and why, and you can retake it.