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Fracturing propping agent for shale gas exploitation and preparation method of fracturing propping agent
The invention belongs to the technical field of gas (oil) exploitation auxiliaries and discloses a fracturing propping agent for shale gas exploitation and a preparation method of the fracturing propping agent. The fracturing propping agent is composed of, by weight, 43-55% of bauxite, 43-55% of shale, 1-3% of barium carbonate and 1-2% of boric acid, wherein BaCO3 is added as a fluxing agent and a binding agent to prevent sintering by lowering the sintering temperature, a certain quantity of monoclinic celsian excellent in acid resistance is generated by Al2O3 and SiO2 to form a protective film on the surface of the propping agent, and accordingly the propping agent can be protected from corrosion of acidic and alkaline substances of rock stratums. The calcination temperature can be lowered by the boric acid, mullite in growth can be slowly wrapped by celsian melts by prolonging of sintering time, and accordingly porosity of blanks can be guaranteed to further improve compressive strength of the propping agent. In addition, corrosion resistance of the propping agent is improved owing to own acid resistance of the boric acid, and adverse effects of K2O, Na2O and the like in raw materials on acid solution can be reduced.
Fracturing propping agent for shale gas exploitation and preparation method of fracturing propping agent
The invention belongs to the technical field of gas (oil) exploitation auxiliaries and discloses a fracturing propping agent for shale gas exploitation and a preparation method of the fracturing propping agent. The fracturing propping agent is composed of, by weight, 43-55% of bauxite, 43-55% of shale, 1-3% of barium carbonate and 1-2% of boric acid, wherein BaCO3 is added as a fluxing agent and a binding agent to prevent sintering by lowering the sintering temperature, a certain quantity of monoclinic celsian excellent in acid resistance is generated by Al2O3 and SiO2 to form a protective film on the surface of the propping agent, and accordingly the propping agent can be protected from corrosion of acidic and alkaline substances of rock stratums. The calcination temperature can be lowered by the boric acid, mullite in growth can be slowly wrapped by celsian melts by prolonging of sintering time, and accordingly porosity of blanks can be guaranteed to further improve compressive strength of the propping agent. In addition, corrosion resistance of the propping agent is improved owing to own acid resistance of the boric acid, and adverse effects of K2O, Na2O and the like in raw materials on acid solution can be reduced.
Fracturing propping agent for shale gas exploitation and preparation method of fracturing propping agent
ZHANG TIANCHENG (author) / XUE JIANGUO (author) / LIU XIANWEI (author)
2015-08-12
Patent
Electronic Resource
English
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