Method for reducing high water cut oil field single pipe gathering and transportation wellhead back pressure

Method for reducing high water cut oil field single pipe gathering and transportation wellhead back pressure

  • CN 104,212,434 A
  • Filed: 06/05/2013
  • Published: 12/17/2014
  • Est. Priority Date: 06/05/2013
  • Status: Active Grant
First Claim
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1. reduce a method for the defeated wellhead back pressure of high water cut oil field monotube gathering, it is characterized in that step is as follows:

  • Step 1, prepare visbreaking agent A;

    The each component weight percent of visbreaking agent A is;

    2-17 thiazolinyl-1-aminoethyl tetrahydroglyoxaline chlorination acid sodium, 2.5% ~ 2.75%;

    N-benzyl-2-heptadecyl benzoglyoxaline sodium sulfonate, 1.5% ~ 1.75%;

    Dodecyldimethylamine oxide, 4.25% ~ 4.5%;

    Polyoxyethylene (15) secondary octyl phenolic ether, 13.5% ~ 15.5%;

    Octyl phenol polyethylene oxide (10) ether, 8.75% ~ 9.25%;

    Castor oil polyoxyethylene (90) ether, 2.25% ~ 2.5%;

    ω

    -hydrogen perfluoro-heptanoic acid sylvite, 0.015% ~ 0.0175%;

    Urethanum, 0.5% ~ 0.55%;

    Methyl alcohol, 10.0% ~ 11.5%,All the other are water;

    First, by 2-17 thiazolinyl-1-aminoethyl tetrahydroglyoxaline chlorination acid sodium, N-benzyl-2-heptadecyl benzoglyoxaline sodium sulfonate, dodecyldimethylamine oxide, polyoxyethylene (15) secondary octyl phenolic ether, octyl phenol polyethylene oxide (10) ether, castor oil polyoxyethylene (90) ether, seven kinds of components such as ω

    -hydrogen perfluoro-heptanoic acid sylvite add enamel reaction still by weight;

    Slowly be warmed up to 65 ~ 70 DEG C, stir and add urethanum in proportion after 60 minutes, stir after 60 minutes, add first alcohol and water under constant agitation, continue stirring after 60 minutes, stop heating, cooling limit, limit is stirred, and cooling normal temperature, obtains visbreaking agent A;

    Step 2, visbreaking agent A to be added from high-water-cut oil-producing well oil jacket annular space;

    In 50 ~ 60mg/l(visbreaking agent A and oilwell produced fluid amount) the ratio that adds add from high-water-cut oil-producing well oil jacket annular space after;

    Oil Well Back Pressure controls at 0.5 ~ 1.5MPa.

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