Coaxial photoelectric integrated sensor for measuring multiple parameters in petroleum production and measuring method

The invention relates to a petroleum production multi-parameter measurement coaxial photoelectric integrated sensor which comprises a capacitance measurement module, a conductivity correlation measurement module, a near-infrared absorption type annular multi-detection-point optical fiber correlation measurement module and a circuit control system. The conductivity correlation measurement modules are arranged on the two axial sides of the near-infrared absorption type annular multi-detection-point optical fiber correlation measurement module and are coaxially arranged, the measurement method is provided based on the conductivity correlation measurement modules, output signals of a sensor are obtained, the fusion cross section gas holdup, the flow parameter and the correction water holdup are sequentially calculated, and the gas holdup and the correction water holdup are obtained. And obtaining final multiphase flow parameters and section gas phase distribution characteristics. The device solves the problems th