Foamer/sulfur scavenger composition and methods for making and using same

A method comprising the steps of:

• injecting into a downhole fluid an aqueous solution comprising a first effective amount of a foaming composition to produce a foam;
• bringing the foam to a surface of the well;
• adding a defoaming agent to the foam at the surface to break the foam and produce a two phase system;
• separating production or organic fluids from the two phase system;
• and
• adding a supplemental effective amount of the foaming composition to reform a foam,
• where the foaming composition comprises from about 20 wt. % to about 80 wt. % at least one surfactant and from about 20 wt. % to about 80 wt. % at least one sulfur scavenging agent and optionally an additive, where the additive is selected from the group consisting of a carbon dioxide control agent, a corrosion inhibitor, a scale inhibitor, an oxygen control agent, a hydrocarbon dispersing agent and mixtures or combinations thereof,
• where the sulfur scavenging agent or the sulfur scavenging agent and the optional additive concentrate in bubble walls in bubbles in the foam,
• where the sulfur scavenger or the sulfur scavenger and the additive improve foam characteristics including foam stability and foam height, while simultaneously the resulting foam improves the activity of the sulfur scavenger or the activity of the sulfur scavenger and the additive, and where the effective amount is sufficient to decrease a fluid column weight increasing well fluids flow out of the well.

A method comprising the steps of:

• injecting into a downhole fluid via coiled tubing an aqueous solution comprising a first effective amount of a foaming composition below a fluid level to produce a foam downhole;
• lifting the foam to a surface of the well;
• separating the foam into an organic phase and an aqueous phase;
• and
• optionally adding a defoaming agent to the foam to facilitate foam separation into the organic and aqueous phases;
• where the foaming composition comprises from about 20 wt. % to about 80 wt. % at least one surfactant and from about 20 wt. % to about 80 wt. % at least one sulfur scavenging agent and optionally an additive, where the additive is selected from the group consisting of a carbon dioxide control agent, a corrosion inhibitor, a scale inhibitor, an oxygen control agent, a hydrocarbon dispersing agent and mixtures or combinations thereof,
• where the sulfur scavenging agent or the sulfur scavenging agent and the optional additive concentrate in bubble walls in bubbles in the foam,
• where the sulfur scavenger or the sulfur scavenger and the additive improve foam characteristics including foam stability and foam height, while simultaneously the resulting foam improves the activity of the sulfur scavenger or the activity of the sulfur scavenger and the additive, and where the effective amount is sufficient to decrease a fluid column weight increasing well fluids flow out of the well.