Composite blocking remover and method for removing blockage of compact sandstone reservoir pressing crack commissioning horizontal well in composite manner
A compound plug-removing agent and plug-removing technology, which are applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc. Enhanced recovery effect
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[0033] Example 1
[0034] The composite plug-removing agent of this embodiment includes a pre-treatment liquid, a main treatment liquid, an active plug-removing liquid and a post-treatment liquid;
[0035] The pretreatment solution is composed of the following components in weight percentage: 3.0% acetic acid, 3.0% hydrochloric acid, 3.0% hydrofluoric acid, 2.0% potassium chloride, 0.01% ammonium persulfate, 0.5% ethylenediaminetetraacetic acid, butane Alkyne glycol 0.6%, alkylphenol polyoxyethylene ether 0.2%, propylene glycol methyl ether 0.5%, the balance is water; the water in the pretreatment solution is 50m 3 ;
[0036] The main treatment liquid is composed of the following components by weight percentage: 1.0% acetic acid, 2.0% hydrochloric acid, 1.0% hydrofluoric acid, 2.0% potassium chloride, 0.01% ammonium persulfate, 0.01% amphoteric fluorocarbon surfactant, and balance The amount is water; the water in the main treatment liquid is 90m 3 ;
[0037] The active plugging solu...
Example Embodiment
[0044] Example 2
[0045] The composite plug-removing agent of this embodiment includes a pre-treatment liquid, a main treatment liquid, an active plug-removal liquid and a post-treatment liquid;
[0046] The pretreatment solution is composed of the following components in weight percentage: 5.0% acetic acid, 5.0% hydrochloric acid, 5.0% hydrofluoric acid, 5.0% potassium chloride, 0.02% ammonium persulfate, 2.0% ethylenediaminetetraacetic acid, butane Acetylene glycol 1.0%, alkylphenol polyoxyethylene ether 0.2%, propylene glycol methyl ether 2.0%, the balance is water; the water in the pretreatment solution is 35m 3 ;
[0047] The main treatment liquid is composed of the following components by weight percentage: 3.0% acetic acid, 5.0% hydrochloric acid, 2.0% hydrofluoric acid, 3.0% potassium chloride, 0.02% ammonium persulfate, 0.08% amphoteric fluorocarbon surfactant, and the remaining The amount is water; the water in the main treatment liquid is 80m 3 ;
[0048] The active plugg...
Example Embodiment
[0055] Example 3
[0056] The composite plug-removing agent of this embodiment includes a pre-treatment liquid, a main treatment liquid, an active plug-removal liquid and a post-treatment liquid;
[0057] The pretreatment solution is composed of the following components in weight percentage: 4.0% acetic acid, 4.0% hydrochloric acid, 4.0% hydrofluoric acid, 3.5% potassium chloride, 0.02% ammonium persulfate, 1.2% ethylenediaminetetraacetic acid, butane Alkyne glycol 0.8%, alkylphenol polyoxyethylene ether 0.2%, propylene glycol methyl ether 1.2%, the balance is water; the water in the pretreatment solution is 40m 3 ;
[0058] The main treatment liquid is composed of the following components by weight percentage: 2.0% acetic acid, 3.5% hydrochloric acid, 1.5% hydrofluoric acid, 2.5% potassium chloride, 0.01% ammonium persulfate, 0.05% amphoteric fluorocarbon surfactant, and the remaining The amount is water; the water in the main treatment liquid is 85m 3 ;
[0059] The active plugging...
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