Process for foaming a wet hydrocarbon composition
View Patent ↗A composition of a wet hydrocarbon foaming agent including a siloxane can foam wet hydrocarbons. The siloxane wet hydrocarbon foaming agent advantageously foams hydrocarbons that have as little as 5 percent water present and those hydrocarbons having as much as 90 percent water present. The wet hydrocarbon foaming agent can be used in oil and gas production for gas lift and foam blocking applications. The foaming agent can also be used for clearing hydrocarbons from pipelines and other vessels used for transporting oil and gas.
1. A process for recovering oil from a gas-lifted oil well penetrating a subterranean oil-bearing formation, the process comprising:
A) providing a lift gas and a wet hydrocarbon foaming agent at an oil well wherein the oil well penetrates a subterranean oil-bearing formation and has formation fluids in the well bore;
B) introducing a lift gas into the oil well; and
C) introducing a wet hydrocarbon foaming agent into the oil well, wherein:
i) the wet hydrocarbon foaming agent functions to:
(a) reduce the surface tension between the formation fluids and the lift gas;
(b) create a lift gas-formation fluid foam; or
(c) both (a) and (b);
ii) the wet hydrocarbon foaming agent and lift gas are injected into the oil well at a depth sufficiently deep to lift formation fluids to the surface; and
iii) the wet hydrocarbon foaming agent is selected from the group consisting of a polysiloxane, an ethoxylated siloxane, a propoxylated siloxane, an ethoxylated and propoxylated siloxane and combinations thereof.
2. The process of claim 1 additionally comprising using a hydrocarbon soluble foaming agent.
3. The process of claim 2 wherein the wet hydrocarbon foaming agent and the hydrocarbon soluble foaming agent are introduced into the well together.
4. The process of claim 2 wherein the wet hydrocarbon foaming agent is introduced into the oil well first.
5. The process of claim 2 wherein the hydrocarbon soluble foaming agent is introduced into the well first.