Oil-in-water emulsion for horizontal well water plugging and preparation method of oil-in-water emulsion
An oil-in-water emulsion, horizontal well technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve problems such as unsatisfactory water blocking effect, low water blocking strength, and withdrawal plugging strength. , to achieve the effect of good water blocking effect, simple preparation process and low initial viscosity
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Embodiment 1
[0020] The raw materials (parts by weight) used in the horizontal well water plugging oil-in-water emulsion A are: heavy oil 30, deionized water 60, alkylphenol polyoxyethylene ether 0.1, sorbitan oleate 0.2 and polyethylene glycol 0.1.
[0021] The preparation method of oil-in-water emulsion A for water plugging in horizontal wells, the specific steps are as follows:
[0022] (2) Preparation of water phase
[0023] Take 60g of deionized water and put it into a beaker, heat the deionized water to 40°C, add 0.1g of alkylphenol polyoxyethylene ether into the deionized water, stir evenly, the stirring speed is 200rpm, and the stirring time is 10min. After the stirring time is over, Naturally cool down to room temperature to obtain an aqueous phase;
[0024] (2) Preparation of oil phase
[0025] Take 30g of thick oil and put it into a beaker, heat the thick oil to 50°C, add 0.2g of sorbitan oleate to the thick oil, stir evenly, the stirring speed is 500rpm, and the stirring tim...
Embodiment 2
[0028] The raw materials (parts by weight) used in the water plugging oil-in-water emulsion B of the horizontal well are: heavy oil 32, deionized water 65, polyoxyethylene sorbitan monostearate 0.13, sorbitan oleate 0.28 and Polyethylene glycol 0.15.
[0029] The preparation method of oil-in-water emulsion B for water plugging in horizontal wells, the specific steps are as follows:
[0030] (1) Preparation of water phase
[0031] Take 65g of deionized water and put it into a beaker, heat the deionized water to 42°C, add 0.13g of polyoxyethylene sorbitan monostearate to the deionized water, stir well, the stirring speed is 280rpm, and the stirring time is 18min. Naturally cool down to room temperature after the stirring time ends to obtain an aqueous phase;
[0032] (2) Preparation of oil phase
[0033] Take 32g of thick oil and put it into a beaker, heat the thick oil to 60°C, add 0.28g of sorbitan oleate to the thick oil, stir evenly, the stirring speed is 550rpm, and the ...
Embodiment 3
[0036] The raw materials (parts by weight) used in the horizontal well water plugging oil-in-water emulsion C are: heavy oil 35, deionized water 63, alkylphenol polyoxyethylene ether 0.16, sorbitan oleate 0.22 and polyethylene glycol 0.17.
[0037] The preparation method of oil-in-water emulsion C for water plugging in horizontal wells, the specific steps are as follows:
[0038] (1) Preparation of water phase
[0039] Take 63g of deionized water and put it into a beaker, heat the deionized water to 45°C, add 0.16g of alkylphenol polyoxyethylene ether into the deionized water, stir evenly, the stirring speed is 250rpm, and the stirring time is 13min. After the stirring time is over, Naturally cool down to room temperature to obtain an aqueous phase;
[0040] (2) Preparation of oil phase
[0041] Take 35g of thick oil and put it into a beaker, heat the thick oil to 65°C, add 0.22g of sorbitan oleate to the thick oil, stir evenly, the stirring speed is 580rpm, and the stirrin...
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