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Methods and compositions for stimulating the production of hydrocarbons from subterranean formations

  • US 10,196,557 B2
  • Filed: 03/16/2016
  • Issued: 02/05/2019
  • Est. Priority Date: 06/14/2013
  • Status: Active Grant
First Claim
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1. A method of treating an oil well having a wellbore, comprising:

  • injecting a microemulsion into the wellbore to increase formation crude oil production by the well, wherein the microemulsion comprises water, a first type of solvent, and a first type of surfactant, wherein the microemulsion includes a continuous water phase,wherein the first type of solvent is selected from the group consisting of unsubstituted cyclic or acyclic, branched or unbranched alkanes having 6-12 carbon atoms, unsubstituted acyclic branched or unbranched alkenes having one or two double bonds and 6-12 carbon atoms, cyclic or acyclic, branched or unbranched alkanes having 9-12 carbon atoms and substituted with only an —

    OH group, branched or unbranched dialkylether compounds having the formula CnH2n+1OCmH2m+1, wherein n+m is between 6 and 16, and aromatic solvents having a boiling point between about 300-400°

    F.

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