China University of Petroleum

Jingxue Wang

Juan Zhang

Qichao Lv

Rong Zheng

Tongke Zhou

Zhaoxia Dong

Zihao Yang

Meiqin Lin

Haimin Zheng

The disclosure discloses a foam fracturing fluid with double interface layers of a phlogisticated air-liquid COfor shale gas development, and a preparation method thereof. The foam fracturing fluid is prepared from a liquid COphase, a gas phase and a nano-enhancer; the liquid COphase is formed by dissolving a mixture of gas-soluble foaming agents in liquid CO; the gas phase is a gas mixture of phlogisticated air and saturated vapor of the liquid CO; the nano-enhancer is an aqueous solution of a mixture of hydrophobic silica nanoparticles, a cosolvent and a water-soluble surfactant. In the fracturing fluid prepared by the present disclosure, the phlogisticated air was encapsulated by the liquid COto form an interface layer, the liquid COwas further encapsulated by the nano-enhancer to form the other interface layer, which enhanced the structural stability of the fracturing fluid while achieving high viscosity and thermal stability.

Foam fracturing fluid with double interface layers of a phlogisticated air-liquid CO2 for shale gas production and preparation method thereof

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Beijing, China

Jingxue Wang