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Methods and compositions for use in oil and/or gas wells

  • US 9,884,988 B2
  • Filed: 03/14/2014
  • Issued: 02/06/2018
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A method of treating an oil and/or gas well having a wellbore, comprising:

  • injecting a solution into the wellbore, wherein the solution comprises;

    a stimulation fluid utilized in offshore wells, anda microemulsion, wherein the microemulsion comprises a water continuous phase, andwherein the microemulsion comprises;

    between about 1 wt % and about 95 wt % water;

    between about 1 wt % and about 30 wt % solvent, wherein the solvent comprises a terpene and an ester of fatty acid, wherein the ester of fatty acid has the formula R7O(C═

    OR8), wherein R7 and R8 are the same or different and are cyclic or acyclic, branched or unbranched C1-16 alkyl, optionally substituted, wherein the ratio of the terpene to the ester of fatty acid by weight is between 1;

    2 and 2;

    1;

    between about 0 wt % and about 50 wt % alcohol;

    between about 1 wt % and about 90 wt % surfactant;

    between about 0 wt % and about 70 wt % freezing point depression agent; and

    between about 0 wt % and about 70 wt % other additives.

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