Lignosulfonate-formaldehyde condensation products as additives i

Details Lignosulfonate-formaldehyde condensation products as additives i Lignosulfonate-formaldehyde condensation products as additives i

1979-03-23

1980-08-26

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166274, 166275, E21B 4322

Patent

active

042190827

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 via the injection well into the formation an aqueous solution of lignosulfonate-formaldehyde condensation products as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carried out by injecting the lignosulfonate-formaldehyde condensation products into the formation through the injection well mixed with either a polymer, a surfactant solution and/or a micellar dispersion. This mixture would then be followed by a drive fluid such as water to push the chemicals to the production well.

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patent: 4072192 (1978-02-01), Kudchadker et al.
patent: 4088584 (1978-05-01), Smalley et al.
patent: 4133385 (1979-01-01), Kalfoglou
patent: 4142582 (1979-03-01), kalfoglou
patent: 4157115 (1979-06-01), Kalfoglou

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