Title: Alkoxylated asphalts as sacrificial agents in oil recovery processes

Abstract: A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting into the formation via the injection well an aqueous solution of ethoxylated asphalts as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. Normally the process would be carried out by first injecting the ethoxylated asphalts into the formation through the injection well and following them with either a polymer or a surfactant solution. The polymer and/or surfactant would then be followed by a drive fluid such as water to push the chemicals to the production well.

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Inventors: Kudchadker, Mohan V. (Houston, TX, US)
Walker, Thad O. (Houston, TX, US)

Application Number: 612118
Filing Date: 1975-09-10
Publication_date: 1976-09-07
Assignee: Texaco Inc. (Houston, TX)
Primary Class(es): 166/270.1 507/232, 507/936
Other Classes:
US Patent Ref:

3087539	Apr, 1963	Maurer	166/274.
3414053	Dec, 1968	Treiber et al.	166/273.
3437141	Apr, 1969	Brandner et al.	166/273.
3469630	Sep, 1969	Hurd et al.	166/273.
3478823	Nov, 1969	Murphy	166/274.
3498379	Mar, 1970	Murphy	166/273.
3777817	Dec, 1973	Feuerbacher et al.	166/273.
3788399	Jan, 1974	Feuerbacher et al.	166/274.
3797574	Mar, 1974	Feuerbacher et al.	166/274.
3910350	Oct, 1975	Mastroianni	166/274.

Other Refs: 168,398

Apr, 1965	SU

Primary Examiner: Purser, Ernest R.
Assistant Examiner: Ebel, Jack E.
Attorney: Ries; Carl G., Whaley; Thomas H., Priem; Kenneth R.