Flowback-free clean acidification plug removal working fluid as well as preparation method and application of flowback-free clean acidification plug removal working fluid
A working fluid and clean technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problems of short effective period of plug removal, great influence on the life of construction equipment, and influence on the effect of plug removal operation, etc. To achieve the effect of reducing the cost of plug removal operation, safety and environmental protection of plug removal operation, and improving the overall recovery factor
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[0069] Correspondingly, the present application also provides a method for preparing the above-mentioned non-flowback cleaning and acidizing plug-removing working fluid, which includes the following steps: mixing raw materials according to a proportion.
[0070] In a preferred embodiment, when mixing, the main agent of the plug-relieving agent can be mixed with water first, and then mixed with the precipitation inhibitor, the regulator and the auxiliary agent of the plug-removing agent in sequence, and then mixed with the sulfur-fixing agent and the wetting reversal agent. Mix with absorbent.
[0071] In an optional embodiment, the mixing includes: adding the main agent of the blocking agent into water, and stirring for 15-30 minutes under the condition of 60-120 r / min; then adding a precipitation inhibitor, stirring for 20-30 minutes; then adding a regulator, Stir for 10-20min; then add plug-removing agent auxiliary under the conditions of pH 3-4 and stirring speed of 300-360...
Embodiment 1
[0076] The present embodiment provides a non-flowback cleaning and acidizing plug-removing working fluid, which is prepared by the following method:
[0077] Based on the preset required non-flowback cleaning acidification and blocking removal working fluid in weight percentage, under normal temperature conditions, 73% of industrial tap water was firstly added to the reaction kettle, and the stirring speed of the reaction kettle was controlled to be 60 r / min. Add 8% of N-β-hydroxyethylethylenediaminetriacetic acid and 2% of phosphonocarboxylic acid copolymer into the reaction kettle, stir for 15min; then add 2% of potassium hydroxyethylidene diphosphonate, stir for 20min; add 1% acetic acid and 3% sodium acetate were stirred for 10min, and the pH value was 4; the stirring speed of the reaction kettle was controlled to 300r / min, 4% percarbonamide was rapidly added, and the mixture was stirred for 20min; and then 1% ethylene glycol was added. Aldehyde and 1% 1,3,5-triazine were ...
Embodiment 2
[0079] The present embodiment provides a non-flowback cleaning and acidizing plug-removing working fluid, which is prepared by the following method:
[0080]Based on the preset required non-flowback cleaning acidification and blockage removal working fluid in weight percentage, under normal temperature conditions, first add 61% of industrial tap water, control the stirring speed of the reaction kettle to 60r / min, and add to the reaction kettle. 10% of N-β-hydroxyethylethylenediaminetriacetic acid and 1% of phosphonocarboxylic acid copolymer, stirred for 30min; then added 3% of pentapotassium diethylenetriaminepentaacetate, stirred for 30min; added 2% of Acetic acid and 5% sodium acetate were stirred for 20min, and the pH value was 3; the stirring speed of the reaction kettle was controlled to 360r / min, 5% percarbonamide was added rapidly, and the mixture was stirred for 30min; then 2% glyoxal and 2% glyoxal were added. 1,3,5-triazine was stirred for 20min; 2% methyltrioctylamm...
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Abstract
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