Gas-liquid static mixer and use method thereof

The invention belongs to the field of petrochemical engineering, and particularly relates to a gas-liquid static mixer. Comprising a mixing pipeline and a spiral guide vane arranged in the mixing pipeline, a first liquid inlet pipe, a second liquid inlet pipe and a gas inlet pipe are arranged at the first end of the mixing pipeline, and a mixed solution outlet pipe is arranged at the second end of the mixing pipeline; the gas inlet pipe is connected with the spiral guide vane; the spiral guide vane is hollow, and the surface is provided with a gas nozzle. Two-way self-spiral of a mixture solution is achieved, gas and liquid are impacted and mixed in a distributed mode in the whole mixing area, the mixing effect is good, no mechanical cutting structure exists, shearing degradation of the mixture solution is small, the viscosity of the mixture solution is kept, and the efficiency of foam-assisted oxygen reduction air oil displacement is improved. 本发明属于石油化工领域，具体涉及一种气液静态混合器。包括混合管道和设于所述混合管道内部的螺旋导叶，其中：所述混合管道第一端设有第一