Excerpt from the Quaise video:
As we descend into hotter, deeper tiers, the process shifts from pressure-driven to density-driven stimulation. With larger density contrasts between the injected water and pore fluid in the rocks, density takes the lead. The deeper we go, fracturing becomes easier, not more challenging, and reduces the need for massive pumping fleets.
It all results in a superhot subterranean network sweeping away 10-100x more heat than all other forms of geothermal. We are sending water coursing through engineered permeability, harnessing Earth’s most abundant energy and powering the next century of global innovation.
Supercritical fluid dynamics are thus the key to superhot geothermal completions. Water above and 22 mega pascals (3191 psi) enters a supercritical state with liquid-like density and gas-like viscosity. The water that is injected into a hot, supercritical reservoir is thus much denser than the surrounding superhot fluid. The injection of relatively cool water into superhot rock creates and widens fractures increasing permeability without increased pumping pressure.
Bud's Offshore Energy (BOE) 