Method of recovering petroleum from underground formations

Details Method of recovering petroleum from underground formations Method of recovering petroleum from underground formations

1981-11-06

1984-07-03

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

166272, 252 855D, E21B 4322

Patent

active

044573723

ABSTRACT:
A method is disclosed in which the production of petroleum is improved or reinstated in formations that have been partially depleted by primary recovery techniques or where the communication between the injection well and the production well has been restricted by the swelling of water sensitive clays in the formation. In this method an aqueous fluid comprising polysaccharide in sufficient concentration to increase the viscosity of the aqueous fluid, a water soluble quanidine compound and a naturally occurring salt is injected into the formation through an injection well and petroleum and aqueous fluids are produced through a production well.

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