Enhanced imbibition oil recovery process

Details Enhanced imbibition oil recovery process Enhanced imbibition oil recovery process

1992-06-16

1993-09-28

Suchfield, George A.

Wells

Processes

Heating, cooling or insulating

1663051, E21B 4322, E21B 4324

Patent

active

052479935

ABSTRACT:
Oil production from a fractured, oil-bearing subterranean formation is enhanced by sequentially injecting (i) a wettability reversal agent-containing fluid and (ii) an overflush fluid through a well and into the formation. The well is then place into production after allowing a sufficient period of time for (a) the matrix face of the formation to change from preferentially oil wet to preferentially water wet and (b) a displacing fluid (e.g., hot water, steam) to imbibe into the fractured matrix and displace the oil from the matrix into the fracture cracks.

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