Enhanced liquid hydrocarbon recovery process
March 11, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3530940 3759325 Acid foam fracturing Foamable compositions and formations treatment Foamable compositions and formations treatment Gel and process for preventing carbon dioxide break through Method and composition for oil recovery by gas flooding Method for emplacement of a gelatinous foam in gas flooding enhanced recovery Chemical blowing agents for improved sweep efficiency Constant viscosity foam InventorAssigneeApplicationNo. 667715 filed on 03/11/1991US Classes:166/402, CO2 or carbonated gas166/268, Distinct, separate injection and producing wells166/309Producing foam or gas in well by foaming or gas producing materialExaminersPrimary: Novosad, Stephen J.Attorney, Agent or FirmInternational ClassE21B 043/22AbstractA polymer enhanced foam comprising a polymer selected from a synthetic polymer or a biopolymer, a surfactant, an aqueous solvent and a gas is injected into a fractured subterranean formation via a first well in fluid communication with the formation and preferentially enters fractures present in the formation. The injected polymer enhanced foam promotes the recovery of liquid hydrocarbons from said formation via the first well or a second well in fluid communication with the formation.Other References
Field of SearchDistinct, separate injection and producing wellsInjecting a composition to adjust the permeability (e.g., selective plugging) Injected fluid comprises water and material other than inorganic gas Cement or consolidating material is organic or has organic ingredient Placing fluid into the formation | |
