The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1987
Filed:
May. 22, 1986
Burton M Casad, Ponca City, OK (US);
Yogendra Soni, Ponca City, OK (US);
Jeff J Jurinak, Ponca City, OK (US);
Conoco Inc., Ponca City, OK (US);
Abstract
The addition of vaporized solvent to injected steam in a fracture-assisted steamflood process provides surprisingly significant enhancement of the process as compared to both the basic fracture-assisted steamflood process of the Britton et al. U.S. Pat. No. 4,265,310 patent and to a conventional matrix drive type steamflood process utilizing solvent. Much lower solvent losses to the formation are observed than are generally provided by conventinal matrix drive type steamflood processes utilizing solvent. Dramatically different effects of the addition of heat-scavenging water follow-up after the steam injection phase are observed as compared to a conventional process utilizing solvent. Directly opposite effects are observed from changes in solvent composition as compared to conventional matrix drive type steamflood processes utilizing steam; for the present invention SOR is decreased by going to lighter solvents, whereas with a conventional process, lighter solvents increase the SOR. Furthermore, the solvent enhanced fracture-assisted steamflood process provides significantly lower overall SOR and significantly higher percentages of recovery of original oil in place, as compared to a conventional steamflood process utilizing solvent.