CO2-soluble foaming agent and its preparation method
A foam agent and foam technology, applied in the field of CO2-soluble foam agent and its preparation, can solve problems such as difficult injection and corrosion of wellbore, achieve good solubility and foam stability, and improve injectability
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[0025] Example 1
[0026] Mix 3 g of octylphenol polyoxyethylene ether with a degree of polymerization of 5 to 15 and 12 g of amyl alcohol and add it to a high-temperature and high-pressure visual foam instrument. 2 , and stir at a speed of 200r / min until all octylphenol polyoxyethylene ether and amyl alcohol are dissolved in CO 2 , record the pressure in the foam meter at this time as 10.3MPa, and calculate the added CO. 2 The mass is 305.91g, thus calculating the octylphenol polyoxyethylene ether in CO under the experimental conditions 2 The solubility in 0.94% indicates that the prepared foaming agent has good solubility.
[0027] Prepared soluble in CO 2 After the foaming agent is injected into the reservoir, it will generate foam when it encounters the formation water to achieve the plugging effect. With 30.6g NaCl, 0.62g MgSO 4 and 0.45g CaCl 2 Prepare 200ml of simulated high-salinity formation water with a salinity of 150,000mg / L; take 1g of octylphenol polyoxyeth...
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