Compositions and methods for paraffin liquefaction and enhanced oil recovery in oil wells and associated equipment
The subject invention provides compositions comprising solvents and surfactants, as well as their use in improving oil and/or gas production. In some embodiments, the compositions comprise chemical or synthetic solvents and/or surfactants. In other embodiments, the compositions comprise biological components, such as microorganisms and/or their growth by-products. The subject invention can be used to dissolve, disperse and/or emulsify paraffin precipitates and/or deposits; prevent and/or inhibit paraffin deposition; remove rust deposits and prevent corrosion associated therewith; inhibit bacterial growth and/or biofilm formation; and to enhance oil recovery.
1. A method for improving oil and/or gas production comprising applying to a subterranean formation, an oil and/or gas well, a wellbore and/or equipment associated therewith,
one or more co-solvents,
a sophorolipid, and
one or more surfactants
wherein the equipment comprises a pipe line, storage tank, casing, tubing, rod, and/or pump.
2. The method of claim 1 , used to remove and/or dissolve organic deposit sand scale deposits on surfaces of the subterranean formation, oil and/or gas well, wellbore and/or equipment.
3. The method of claim 1 , wherein the well is an offshore well.
4. The method of claim 1 , wherein the method is used in oil wells with formation water salinity of 250,000 ppm (total dissolved solids) or more.
5. The method of claim 1 , wherein the one or more solvents, sophorolipid and one or more surfactants are applied in a single composition.
6. The method of claim 1 , wherein the one or more co-solvents include isopropyl alcohol and/or methanol.
7. The method of claim 1 , wherein the one or more co-solvents include an aromatic hydrocarbon.
8. The method of claim 1 , wherein the one or more surfactants include an ethoxylated alcohol.
9. The method of claim 8 , wherein the ethoxylated alcohol is a C8-C18 ethoxylated alcohol.
10. The method of claim 1 , wherein the composition further comprises one or more chelating agents.
11. The method of claim 10 , wherein the one or more chelating agents are selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), sodium citrate and citric acid.