A method for releasing the hysteresis of sucker rod descending in polymer flooding production well

A technology for sucker rods and production wells, applied in the field of polymer flooding production well sucker rod down-lag release, polymer flooding well production fluid viscosity reduction technology, can solve the problems of high cost, short cycle, etc., to solve the down-lag , long cycle and low degradation cost

Active Publication Date: 2018-08-14
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is a method for removing the downward hysteresis of the sucker rod in a polymer flooding production well, which is used to solve the high cost of hot washing and oxidative degradation commonly used at present , the problem of short cycle

Method used

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  • A method for releasing the hysteresis of sucker rod descending in polymer flooding production well
  • A method for releasing the hysteresis of sucker rod descending in polymer flooding production well
  • A method for releasing the hysteresis of sucker rod descending in polymer flooding production well

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Embodiment 1

[0022] The method for releasing the downward hysteresis of the sucker rod in the polymer flooding production well: add polyepichlorohydrin amine, sodium carbonate, urotropine, and sulfamic acid to the pumping unit well in normal production by dripping medicine at the wellhead acid, wherein the addition of polyepichlorohydrin amine is 0.5% to 0.8% of the mass of the pumping well production fluid, the addition of sodium carbonate is 0.3% to 0.7% of the mass of the pumping well production fluid, urethane The addition of tropine is 0.1% of the mass of the pumping well production fluid, the addition of sulfamic acid is 2% to 4% of the mass of the pumping well production fluid, polyepichlorohydrin amine and the production fluid Polyacrylamide forms an ultra-low-viscosity association colloid solution; making the production fluid easy to be extracted from the ground.

[0023] Utilize this embodiment to secretly carry out field test of 5 wells in the sixth oil production plant of Daqin...

Embodiment 2

[0028] The method for removing the downward hysteresis of the sucker rod in the polyflooding production well: mix polyepichlorohydrin amine, sodium percarbonate, urotropine, sulfamic acid, and water to form a mixed solution, and after mixing, polyepichlorohydrin amine The mass percentage concentration of sodium percarbonate is 0.5%~0.8%, the mass percentage concentration of sodium percarbonate is 0.3%~0.7%, the mass percentage concentration of urotropine is 0.1%, and the mass percentage concentration of sulfamic acid is 2%~4%. , the amount of solvent water is 94.4~97.2%; for pumping wells with serious hysteresis or stopped pumping, during the well cleaning process, the mixed solution is injected into the bottom of the well through the annular space of the pumping well, and the oxidant at the bottom of the well is first combined with the The effect of polyacrylamide, the polyacrylamide in the formation is oxidized by the oxidant to polyacrylamide or carbon dioxide and water with...

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Abstract

The present invention relates to a method for releasing the downward hysteresis of the sucker rod in the polymer flooding production well. The method for releasing the downward hysteresis of the sucker rod in the polymer flooding production well is to add medicine by dripping at the wellhead to the pumping well in normal production. method, adding polyepichlorohydrin amine, oxidant, corrosion inhibitor, and scale remover, wherein, the amount of polyepichlorohydrin amine added is 0.5%~0.8% of the mass of the pumping well production fluid, and the amount of oxidant added It is 0.3%~0.7% of the mass of the pumping well produced fluid, the addition of corrosion inhibitor is 0.1% of the mass of the pumping well produced fluid, and the addition of scale remover is 2% of the mass of the pumping well produced fluid ~4%, polyepichlorohydrin amine and polyacrylamide in the production fluid form an ultra-low viscosity association colloid solution, which makes the production fluid easy to be extracted from the ground. In the present invention, the polyepichlorohydrin amine and the polyacrylamide in the production fluid form an ultra-low-viscosity association colloid solution, which makes the production fluid easy to be extracted from the ground, and solves the problem of the downward lag of the polymer flooding pumping unit , Low degradation cost.

Description

technical field [0001] The invention relates to the technical field of oil production engineering and relates to the viscosity-reducing technology treatment of production fluid in polymer flooding wells, in particular to a method for releasing the downward hysteresis of sucker rods in polymer flooding production wells. Background technique [0002] Since the industrial application of polymer flooding in oil fields, good oil displacement effects have been achieved, which has a certain positive effect on maintaining high and stable production in oil fields, and has significant economic and social benefits. However, since 2000, the phenomenon of rod not running in wells of polymer flooding pumping units has appeared one after another. Compared with water flooding, the properties of the fluid produced in polymer flooding oil wells are complex, and the maximum suspension point load of the pumping unit increases compared with water flooding after polymer flooding, while the minimu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22E21B37/06C08G65/26C09K8/588
Inventor 艾立玲张荣明赵锦宇马春芳宋娇娇徐丽婷
Owner NORTHEAST GASOLINEEUM UNIV
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