Foam and impedance-guided steam injection

Details Foam and impedance-guided steam injection Foam and impedance-guided steam injection

E - Fixed Constructions

21

B

166/39

E21B 43/04 (2006.01) E21B 43/24 (2006.01)

Patent

CA 1242139

A B S T R A C T FOAM AND IMPEDANCE-GUIDED STEAM INJECTION A selective injection of gaseous fluid into a portion of a subterranean reservoir is improved by positioning an impedance to fluid flow in the annulus between a pipe string and a surrounding permeable-walled conduit, ensuring the presence of granular solids between the permeable-walled conduit and the reservoir, injecting the gaseous fluid through the pipe string to a point below the impedance and injecting fluid which is more viscous than the gaseous fluid down the annulus to restrict by-passing of the impedance

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