Core sampling on-site multifunctional displacement fidelity testing device and testing method thereof

The invention discloses a core sampling field multifunctional displacement fidelity testing device and a testing method thereof. The core sampling field multifunctional displacement fidelity testing device comprises a connection module, a hydrocarbon gas detection module, a pressure and temperature maintaining and flushing module, an isotope detection module and a sound wave detection module. According to the invention, rapid connection and sealing of the coring tool and the experimental device are realized by adopting the connecting module; the existence and component detection of hydrocarbon gas is realized by adopting the hydrocarbon gas detection module; the pressure and temperature maintaining and flushing module is adopted to maintain the pressure and temperature in the device, clean the rock core and flush sediments; the isotope detection module is adopted to realize isotope detection of pore water and sediments; and the sound wave detection module is adopted to realize existence detection of the enric