| abstract |
The invention relates to a preparing method of a high-strength high-temperature-resistance air foam fracturing fluid. The preparing method includes following characteristic steps of: adding hectorite into deionized water having a temperature of 50-90 DEG C, stirring and dispersing uniformly, cooling to room temperature, allowing the mixture to stand and ageing for a certain period of time to obtain a hectorite aqueous dispersion, adding a certain amount of a cationic surfactant, uniformly stirring, allowing the mixture to stand and ageing, adding a foaming agent, and stirring at a high speed by a high-speed emulsifying machine to obtain the high-strength high-temperature-resistance air foam fracturing fluid. The half-life period of the prepared fracturing fluid is 768 h. The fracturing fluid has characteristics of super high foam stability, apparent viscosity reaching 2000 mPa.s, temperature resistance reaching 90 DEG C, high foam strength and temperature resistance, sedimentation time reaching 720 h, and high sand carrying capability, and is suitable for conventional and unconventional oil and gas resource (coal bed methane, shale gas, shale oil, and the like) exploration and development. |