Biodegradable non-reactive oil-well stimulation fluid and method of use

摘要

Formulation for a natural product as a replacement for the use of traditional acidic chemical stimulation methods for the emulsification, removal and release of paraffin and asphaltenes from low producing or pumped off wells and reservoirs with the use of traditional methodologies. Also a method of use of formulation for stimulating an oil well consisting of introducing into the wellbore a biodegradable, non-reactive fluid system containing a water-miscible fatty acid solvent, a solution of fatty acids, an amino alcohol, and at least one non-ionic surfactant. The fluid system may be further in the form of a nanoemulsion that is formed by combining a colloidal solution with one or more emulsifiers, an alcohol, and water. The fluid system may be used in well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and/or downhole equipment.

主权项

1. A biodegradable fluid composition for oil well stimulation comprising:
(a) a water-miscible and biodegradable solvent for vegetable oil-derived fatty acids; (b) at least one surfactant, wherein the at least one surfactant is the product of saponification of at least one C8-C20 fatty acid by an amino alcohol; (c) wherein the fluid droplet size is comprised between 5 and 50 nm; and (d) wherein the fluid composition removes paraffin and asphaltene deposits from the wellbore without chemically reacting with subterranean formations.