Formation fracturing

Wells – Processes – In situ combustion

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166308, E21B 4324

Patent

active

053600681

ABSTRACT:
An oxygenated foam is injected into a hydrocarbon-bearing reservoir within a diatomite-containing subsurface formation to hydraulically form a fracture within the reservoir. Combustion is initiated between the oxygenated foam and hydrocarbons within the reservoir to burn the formation and alter diatomite within the burned area into a hardened, more highly permeable material. The reservoir may again be fractured to shatter the hardened diatomite to further increase reservoir permeability and form a self-propped fracture within the reservoir.

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patent: 3858658 (1975-01-01), Strubhar et al.
patent: 3980136 (1976-09-01), Plummer et al.
patent: 3981362 (1976-09-01), Allen et al.
patent: 4474237 (1984-10-01), Shu
patent: 4617997 (1986-10-01), Jennings, Jr.

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