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A platform for research: civil engineering, architecture and urbanism
Gypsum microspheres and low elasticity modulus expansion well cementation cement system
The invention discloses gypsum microspheres and a low elasticity modulus expansion cement system suitable for medium and low temperature well cementation. The gypsum microspheres are obtained through inverse setting and hardening of a certain proportion of anhydrite, alpha-type hemihydrate gypsum and water. The low elasticity modulus expansion cement system comprises 100 parts of oil well cement, 10-40 parts of gypsum microspheres, 5-10 parts of micro-silicon and 65-75 parts of water, and the volume expansion of set cement and the reduction of elasticity modulus of the set cement are simultaneously realized due to the addition of the gypsum microspheres. The low elasticity modulus expansion cement system meets the long-term requirements of cement sheath isolation completeness and has important engineering significance for ensuring well cementation quality and long-term safety production of oil-gas wells.
Gypsum microspheres and low elasticity modulus expansion well cementation cement system
The invention discloses gypsum microspheres and a low elasticity modulus expansion cement system suitable for medium and low temperature well cementation. The gypsum microspheres are obtained through inverse setting and hardening of a certain proportion of anhydrite, alpha-type hemihydrate gypsum and water. The low elasticity modulus expansion cement system comprises 100 parts of oil well cement, 10-40 parts of gypsum microspheres, 5-10 parts of micro-silicon and 65-75 parts of water, and the volume expansion of set cement and the reduction of elasticity modulus of the set cement are simultaneously realized due to the addition of the gypsum microspheres. The low elasticity modulus expansion cement system meets the long-term requirements of cement sheath isolation completeness and has important engineering significance for ensuring well cementation quality and long-term safety production of oil-gas wells.
Gypsum microspheres and low elasticity modulus expansion well cementation cement system
BU YUHUAN (author) / LIU HUAJIE (author) / GUO XINYANG (author) / GUO SHENGLAI (author) / WANG CHUNYU (author)
2015-07-15
Patent
Electronic Resource
English
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