Resistance reducing acid used for transformation of ultra-deep well
A technology for ultra-deep wells and resistance reduction, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems that restrict the development and utilization of high-temperature deep oil and gas resources, limit the intensity of reservoir transformation, etc., and achieve the purpose of increasing construction displacement and reducing The effect of extra energy consumption and increased transformation intensity
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Embodiment 1
[0028] 2.0% by weight of ethylene glycol-1,2-propanediol copolymer, 2.0% by weight of β-(N,N)-diethylamino phenyl ketone, 1.0% by weight of dodecyl trimethyl chloride Ammonium, 1.0% by weight of sodium erythorbate, 28% by weight of hydrochloric acid, and the balance being water, are equipped with a barrier-reducing acid.
[0029] The acid density is 1.14g / cm 3 , viscosity 11.4mPa.s, surface tension 28.4mN / m, 90°C static corrosion rate 3.32g / m 2 .h, iron ion stability capacity 2260mg / L, 88.9mm pipe diameter, 3.0m3 / min, friction gradient 7.85MPa / 1000m, 120 ℃, 4h no stratification, no precipitation, good thermal stability.
Embodiment 2
[0031] By 2.0% by weight of ethylene glycol-1,2-propanediol copolymer, 2.0% by weight of β-(N,N)-diethylamino phenyl ketone, 1.0% by weight of dodecyl trimethyl bromide Ammonium, 1.0% by weight of hydroxylamine hydrochloride, 28% by weight of hydrochloric acid, and the balance being water, are used to prepare a barrier acid.
[0032] The acid density is 1.14g / cm 3 , viscosity 11.8mPa.s, surface tension 27.9mN / m, 90℃ static corrosion rate 3.26g / m 2 .h, iron ion stability 2235mg / L, 88.9mm pipe diameter, 3.0m 3 / min, friction gradient 7.70MPa / 1000m, 120 ℃, 4h without delamination, no precipitation, good thermal stability.
Embodiment 3
[0034] According to 4.0% by weight of ethylene glycol-1,2-propanediol copolymer, 4.0% by weight of β-(N,N)-diethylamino phenyl ketone, 2.0% by weight of dodecyl trimethyl chloride Ammonium, 2.0% by weight of sodium erythorbate, 28% by weight of hydrochloric acid, and the balance being water, are equipped with a barrier-reducing acid.
[0035] The acid density is 1.14g / cm 3 , viscosity 26.7mPa.s, surface tension 27.1mN / m, 90℃ static corrosion rate 1.74g / m 2 .h, iron ion stability 3345mg / L, 88.9mm pipe diameter, 3.0m 3 / min, friction gradient 4.96MPa / 1000m, 120 ℃, 4h without delamination, no precipitation, good thermal stability.
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