Nano material-based water-based oil field injection agent and preparation method thereof
A technology of nanomaterials and injection enhancers, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of high cost, and achieve significant effects of increasing production capacity, reducing water injection pressure, and
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[0019] Example 1
[0020] Preparation of the stock solution of nano water-based injecting agent: weigh 40wt% diesel fuel, add 2wt% γ-(methacryloxy)propyltrimethoxysilane modified nano silica, and average particle size Approximately 20nm, activation degree ≥99%, emulsifying and dispersing at 7000rpm for 2min, and then adding other surfactants and additives, OP-10 accounts for 15wt%, Span80 accounts for 25wt%, sodium lauryl sulfonate accounts for 10wt%, Ethanol accounted for 8wt%, water bath at 40°C, and mechanical stirring for 10min to obtain the original solution of nano water-based injecting agent.
[0021] Preparation of nano water-based dispersion: measure 1L tap water, add 10wt%, 15wt%, 20wt% of the above-mentioned propellant stock solution, stir and mix uniformly to obtain a nano water-based dispersion.
[0022] The TEM electron micrograph of γ-(methacryloxy)propyltrimethoxysilane modified nano-silica is shown in figure 1 Shown.
Example Embodiment
[0023] Example 2
[0024] Preparation of nano water-based injectant stock solution: weigh 40wt% diesel fuel, add 2wt% oleic acid modified nano silica, average particle size is about 30nm, activation degree ≥99.5%, emulsifier 7000rpm Emulsify and disperse for 2 minutes, then add other surfactants and additives. Sodium petroleum sulfonate accounted for 15wt%, oleic acid accounted for 20wt%, cetyltrimethylammonium chloride accounted for 10wt%, ethanol accounted for 13wt%, water bath 60℃ , Mechanical stirring for 10 minutes, and then obtain the nano water-based injectant stock solution.
[0025] The preparation of the nano water-based dispersion is the same as in Example 1.
[0026] The TEM electron micrograph of oleic acid modified nano-silica is shown as figure 2 Shown.
Example Embodiment
[0027] Example 3
[0028] Preparation of nano water-based injecting agent stock solution: weigh 35wt% of diesel oil, add 2wt% of simethicone modified nano silica, average particle size is about 50nm, activation degree ≥98%, emulsification Emulsify and disperse at 4000rpm for 5min, then add other surfactants and additives, sodium dodecylbenzene sulfonate accounted for 15wt%, oleic acid accounted for 15wt%, NP-10 accounted for 13wt%, ethylene glycol accounted for 20wt%, at room temperature Stir mechanically for 20 minutes to obtain the original solution of nano water-based injecting agent.
[0029] The preparation of the nano water-based dispersion is the same as in Example 1.
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