Nanometer drag reducer for sandstone surface pretreatment and preparation method of nanometer drag reducer
A technology for surface pretreatment and drag reducing agent, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of insufficient hydrophobicity, reducing water injection pressure, restrictions, etc., to facilitate industrial production, reduce construction costs, The effect of simple and easy preparation process
- Application Information
AI Technical Summary
Problems solved by technology
 Example 1
 Pour 125g of surfactant fourteen-carbon alpha-olefin sulfonate, OP-1030g, 65g of PO-EO copolymer with molecular weight of 2400, 150g of co-surfactant propylene glycol and 100g of triethanolamine into the mixer, and the machine at room temperature Stir for 8min. After stirring evenly, slowly add 30g of γ-(2,3 glycidoxy)propyltrimethoxysilane modified nano-silica at 5000r / min. After all the addition, continue to stir for 10min, and then The water bath is kept at 60°C for 20 minutes, and then poured into a high-pressure homogenizer for dispersion, homogenization and emulsification to obtain 500g of nano drag reducer 1 for sandstone surface pretreatment.
 Example 2
 Pour 60g of surfactant dodecylbenzene sulfonate, OP-1060g, Span-8055g, 160g of isopropanol and 140g of glycerol as auxiliary surfactants into the mixer, and mechanically stir for 12min at room temperature, and stir evenly Then slowly add 15g of γ-(2,3 glycidoxy) propyl trimethoxysilane modified nano silica and 10g of γ-aminopropyl triethoxy silane modified nano silica at 3000r / min. After all the silica is added, continue to stir for 8 minutes, then keep it in a water bath at 60°C for 20 minutes, and pour it into a high-pressure homogenizer to disperse, homogenize and emulsify to obtain 500 g of nano drag reducer 2 for sandstone surface pretreatment.
 Example 3
 Pour the surfactant cetyl quaternary ammonium salt 80g, OP-1045g, Tween-8040g and the auxiliary surfactants 130g ethylenedi alcohol and glycerol 170g into the mixer, mechanically stir at room temperature for 10 minutes, and then stir evenly. Slowly add 25g N-β (aminoethyl) γ-aminopropyltrimethoxysilane modified nano silica 10g γ-chloropropyltrimethoxysilane modified nano silica at a speed of 6000r / min, all After the addition, continue to stir for 10 minutes, then keep the temperature in a water bath at 60°C for 30 minutes, and pour it into a high-pressure homogenizer for dispersion, homogenization and emulsification to obtain 500 g of nano drag reducer 3 for sandstone surface pretreatment.
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