Acrylate-based sulfur scavenging agents for use in oilfield operations
Composition for the removal or inactivation of hydrogen sulfide or soluble sulfide ion other species comprising ionizable sulfur (e.g., mercaptans, thiols, etc.) using compositions containing acrylate and/or derivatives thereof are provided. Methods for the removal or inactivation of hydrogen sulfide or other sulfur species in oilfield sites and other related applications using compositions containing acrylate and/or derivatives thereof are provided.
1. A method comprising:
providing a treatment fluid comprising a carrier fluid and an acrylate-based additive, wherein the acrylate-based additive comprises at least one compound selected from the group consisting of compounds having the general formula:
where R 1 is a functional group selected from the group consisting of an alkyl group, an alkene group, an alkyne group, an ester group, an ether group, and any combination thereof; and
R 2 is a hydrocarbon chain;
introducing the treatment fluid into at least a portion of a subterranean formation where one or more sulfur species are present; and
allowing the acrylate-based additive to interact with the sulfur species to reduce the amount of or inactivate at least a portion of the sulfur species present in the subterranean formation.
2. The method of claim 1 wherein the pH level of the treatment fluid is approximately neutral.
3. The method of claim 1 wherein the pH level of the treatment fluid is at least 5.
4. The method of claim 1 wherein the acrylate-based additive further comprises one or more acrylate derivatives.
5. The method of claim 4 wherein the one or more acrylate derivatives comprises an acrylate derivative containing a side chain with sulfur scavenging functionality.
6. The method of claim 1 wherein the concentration of the acrylate-based additive in the treatment fluid is from about 0.5% to about 15% by weight of the treatment fluid.
7. The method of claim 1 wherein the acrylate-based additive is provided in a closed storage tank system at a site where a well bore penetrating at least a portion of the subterranean formation is located, the tank system being equipped with at least an internal temperature probe and transmitter for remote monitoring of the temperature in the closed storage tank system.