A kind of interstitial temporary plugging agent and preparation method thereof
A temporary plugging agent and inter-fissure technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor plugging effect, residue, high cost, etc., and achieve low cost, strong plugging effect, High plugging efficiency
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Embodiment 1
[0014] Take 14g of acrylamide, 18g of natural polyurethane, 2.95g of sulfonate surfactant and 4g of urea into a jar, add 38.95g of water, protect it with nitrogen, put it in a constant temperature water bath at 60°C to preheat and stir for 1 hour; then Take 0.84g of potassium persulfate, 0.14g of isomeric alcohol, and 0.07g of aluminum chloride and add them into a jar, add 1.05g of water, seal it, and pass nitrogen protection. After the reaction is complete (that is, the viscosity of the product rises to the shape of an immobile rubber sheet), take it out, cool to room temperature, and stop the reaction.
[0015] The product was taken out and placed in an oven, and dried at 35°C for 72h. After crushing, sieve to obtain black solid granular temporary plugging agent products with different particle sizes such as 1-3mm and 5-8mm.
[0016] Solubility experiments and plugging performance tests were carried out on the temporary plugging agent prepared by the above method to evaluat...
Embodiment 2
[0026] Take 16g of acrylamide, 16g of natural polyurethane, 2.8g of sulfonate surfactant and 4g of urea into a jar, add 38.8g of water, protect it with nitrogen, put it in a constant temperature water bath at 60°C, preheat and stir for 1 hour; then Take 0.96g of potassium persulfate, 0.16g of isomeric alcohol, and 0.08g of aluminum chloride and add them into a jar, add 1.2g of water, seal it, and pass nitrogen protection. After the reaction is complete (that is, the viscosity of the product rises to the shape of an immobile rubber sheet), take it out, cool to room temperature, and stop the reaction.
[0027] The product was taken out and placed in an oven, and dried at 35°C for 72h. After crushing, sieve to obtain black solid granular temporary plugging agent products with different particle sizes such as 1-3mm and 5-8mm.
[0028] The temporary plugging agent prepared in Example 2 was tested for solubility and plugging performance to evaluate its formation pollution and tempo...
Embodiment 3
[0038] Take 18g of acrylamide, 14g of natural polyurethane, 2.65g of sulfonate surfactant and 4g of urea into a jar, add 38.65g of water, protect it with nitrogen, put it in a constant temperature water bath at 60°C to preheat and stir for 1 hour; then Take 1.08g of potassium persulfate, 0.18g of isomeric alcohol, and 0.09g of aluminum chloride and add them into a jar, add 1.35g of water, seal it, and pass nitrogen protection. After the reaction is complete (that is, the viscosity of the product rises to the shape of an immobile rubber sheet), take it out, cool to room temperature, and stop the reaction.
[0039] The product was taken out and placed in an oven, and dried at 35°C for 72h. After crushing, sieve to obtain black solid granular temporary plugging agent products with different particle sizes such as 1-3mm and 5-8mm.
[0040] The temporary plugging agent prepared in Example 3 was tested for solubility and pressure resistance to evaluate its formation pollution and t...
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