Well cementing slurry capable of preventing CO2 and H2S corrosion
A technology for cementing cement slurry and cement slurry, which can be used in wellbore/well components, drilling composition, earth-moving drilling, etc., and can solve the problems of increased permeability, decreased compressive strength, and shortened life of oil and gas wells. , to achieve the effect of improving compressive strength, eliminating tiny bubbles and prolonging setting time
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[0014] Example 1
[0015] An anti-CO 2 , H 2 S-corrosion cementing cement slurry, which is composed of water and cement with a mass ratio (water-cement ratio) of 0.45:1. The cement comes from the following materials: 100 mass units of G-grade high sulfate-resistant oil well cement , 12 mass units of fine cement, 1 mass unit of dispersant SXY, 1.2 mass units of fluid loss agent BXF-200L, 6 mass units of microsilica JM-1, 8 mass units of fly ash , 1.2 mass units of expansion agent M53S, 9 mass units of latex BCT-800L, 1 mass unit of water-soluble methyl etherified urea-formaldehyde resin, 1.5 mass units of early strength agent CK21, 0.1 mass unit of retarder Agent SN-2, 0.6 mass unit defoamer D50.
[0016] The CO 2 , H 2 The preparation method of S-corrosion cementing cement slurry is: firstly mix the water-soluble methyl etherified urea-formaldehyde resin and water evenly, and then mix the mixture with fluid loss agent BXF-200L, latex BCT-800L, and retarder SN-2 , The defoamer D50...
Example Embodiment
[0017] Example 2
[0018] An anti-CO 2 , H 2 S-corrosion cementing cement slurry, which is composed of water and cement with a mass ratio (water-cement ratio) of 0.45:1. The cement comes from the following materials: 100 mass units of G-grade high sulfate-resistant oil well cement , 15 mass units of fine cement, 1.5 mass units of dispersant SXY, 1.3 mass units of fluid loss agent BXF-200L, 5 mass units of microsilica JM-1, 8 mass units of fly ash , 1.3 mass units of expansion agent M53S, 6 mass units of latex BCT-800L, 1.4 mass units of water-soluble maleic anhydride modified epoxy resin, 2.5 mass units of early strength agent CK21, 0.2 mass units The retarder SN-2, 0.7 mass unit defoamer D50.
[0019] The CO 2 , H 2 The preparation method of S-corrosion cement slurry is the same as in Example 1. Code formula 2.
Example Embodiment
[0020] Example 3
[0021] An anti-CO 2 , H 2 S-corrosion cementing cement slurry, which is composed of water and cement with a mass ratio (water-cement ratio) of 0.45:1. The cement comes from the following materials: 100 mass units of G-grade high sulfate-resistant oil well cement , 17 mass units of fine cement, 1.8 mass units of dispersant SXY, 1.2 mass units of fluid loss agent BXF-200L, 7 mass units of microsilica JM-1, 6 mass units of fly ash , 1.7 mass units of expansion agent M53S, 7 mass units of latex BCT-800L, 1.3 mass units of water-soluble acrylic modified alkyd resin, 2 mass units of early strength agent CK21, 0.2 mass units of retarder Coagulant SN-2, 0.7 mass unit defoamer D50.
[0022] The CO 2 , H 2 The preparation method of S-corrosion cement slurry is the same as in Example 1. Code formula 3.
[0023] In order to study the performance of the present invention, the designer conducted a comparative experiment of formula 1, formula 2, formula 3 and conventional ceme...
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