Compositions and methods for gas well treatment
First Claim
Patent Images
1. A microemulsion system for treating hydrocarbon producing wells comprising:
- a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant,a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, anda co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol,where the system increase hydrocarbon production and where the hydrocarbon comprises crude oil or gas and crude oil.
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Abstract
A microemulsion system is disclosed which comprises a solvent subsystem, a co-solvent subsystem and a surfactant subsystem comprises at least one monoalkyl branched propoxy sulfate anionic surfactant, where the microemulsion system are useful in drilling, producing, remediation, and fracturing application to reduce water blocks and water blocking in formation of a producing formation.
255 Citations
31 Claims
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1. A microemulsion system for treating hydrocarbon producing wells comprising:
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a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, anda co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol, where the system increase hydrocarbon production and where the hydrocarbon comprises crude oil or gas and crude oil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A composition for fracturing a subterranean formation containing crude oil or gas and crude oil and penetrated by a wellbore, the composition comprising:
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a fracturing fluid including; a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, anda co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol, where the composition increases crude oil or gas and crude oil production.
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20. A composition for drilling into a subterranean formation containing crude oil or gas and crude oil, the composition comprising:
a drilling fluid including; a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, anda co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol.
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21. A composition for removing bound water from a producing subterranean formation containing crude oil or gas and crude oil and penetrated by a wellbore, the composition comprising:
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a producing fluid including; a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, anda co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol, where the composition increases crude oil or gas and crude oil production.
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22. A composition for removing bound water from a producing subterranean formation containing crude oil or gas and crude oil and penetrated by a wellbore, the composition comprising:
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a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, anda co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol, where the composition increases crude oil or gas and crude oil production.
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23. A method for removing bound water from crude oil or gas and crude oil bearing subterranean formations comprising:
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injecting into a formation an effective amount of a microemulsion system comprising a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, and a co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol,where the effective amount being sufficient to remove water blocks and to enhance formation production. - View Dependent Claims (24, 25, 26)
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27. A method for fracturing a formation containing crude oil or gas and crude oil comprising:
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pumping, into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, a fracturing fluid comprising; a proppant and a microemulsion system including a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, and a co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol,where the proppant props open the formation after fracturing, and where the microemulsion system reduces water blocks and water blocking in the formation.
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28. A method for fracturing a formation containing crude oil or gas and crude oil comprising the step of:
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pumping a fracturing fluid into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, pumping in a proppant fluid including; a proppant and a microemulsion system comprising a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, and a co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol,where the proppant props open the formation after fracturing, and where the microemulsion system reduces water blocks and water blocking in the formation.
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29. A method for fracturing a formation containing crude oil or gas and crude oil comprising the step of:
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pumping a fracturing fluid into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, pumping in a proppant fluid including a proppant, where the proppant props open the formation after fracturing and pumping a microemulsion system comprising a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, and a co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol, where the microemulsion system reduces water blocks and water blocking in the formation.
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30. A method for producing a formation containing crude oil or gas and crude oil comprising:
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circulating and/or pumping into a well on production a fluid including a microemulsion system comprising a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, and a co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol,where the microemulsion system reduces water blocks and water blocking in the formation.
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31. A method for drilling a formation containing crude oil or gas and crude oil comprising:
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circulating and/or pumping into a well during drilling a fluid including a microemulsion system comprising a surfactant subsystem including at least one monoalkyl branched propoxy sulfate anionic surfactant, a solvent subsystem including from about 0.1 wt. % and about 50 wt. % of an organic solvent and from about 20 wt. % to about 75 wt. % water, where the organic solvent comprises;
(a) benzene, an alkarene, or mixtures thereof, (b) a terpene or a mixture of terpenes, or (c) d-limonene or a mixture of d-limonene and dipentene, and a co-solvent subsystem including a mixture of alcohols and at least one polypropylene glycol,where the microemulsion system reduces fines and debris in the borehole during drilling.
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Specification