Synergistic sulfide scavenging additives for use in oilfield operations
Systems, compositions, and methods for synergistic additives for use in the scavenging of sulfur-containing compounds encountered in oilfield operations are provided. In one embodiment, the methods comprise injecting a sulfide scavenging additive that does not comprise a significant amount of an aldehyde into at least a portion of a subterranean formation where one or more sulfur-containing species are present; and injecting a synergistic additive comprising at least one base into at least the portion of the subterranean formation.
1. A method comprising:
injecting a sulfide scavenging additive that is substantially free of aldehyde, the additive comprising at least one compound selected from the group consisting of an acrylate-based compound, an acrylonitrile-based compound and any combination thereof into at least a portion of a conduit or container where one or more sulfur-containing species are present; and
injecting a synergistic additive comprising at least one weak base into the at least the portion of the conduit or container;
wherein at least one of the sulfide scavenger additive or the synergistic additive is injected as a liquid or a mist.
2. The method of claim 1 wherein the at least one weak base comprises at least one amine.
3. The method of claim 1 wherein the synergistic additive catalyzes a reaction of the sulfide scavenging additive and the sulfur-containing species.
4. The method of claim 1 wherein the synergistic additive reacts with the sulfur-containing species.
5. The method of claim 1 wherein the synergistic additive increases a pH level of at least the portion of the conduit or container.
6. The method of claim 1 wherein the conduit or container comprises at least a portion of a pipeline.
7. The method of claim 1 wherein the conduit or container comprises at least a portion of a refining system.