Experimental device and experimental method for hydrothermal catalytic pyrolysis in heavy oil layer by means of ultrasonic wave

The invention discloses an experimental device and an experimental method for hydrothermal catalytic pyrolysis in a heavy oil layer by means of ultrasonic wave, wherein the experimental device comprises a core holder, a ring pressure supply device, a water storage tank, an oil storage tank, an ultrasonic transducer, an ultrasonic generator, a liquid container, a catalyst, a reaction assistant storage device and a constant temperature box; a steam generator is arranged on a water pipe between the water storage tank and the core holder; the experimental method comprises the following steps: 1, pre-treating tested core; 2, performing water-flooding experiment and measuring original water-flooding permeability of the tested core; 3, performing oil-flooding experiment and measuring original oil saturation degree of the tested core; 4, performing hydrothermal pyrolysis simulation experiment; and 5, preparing data. The experimental device and the experimental method have rational design. The device is convenient to install and distribute, has complete function, is convenient to use and operate and has good usage effect. The problems that the prior normal steam thermal driving heavy oil has easily-rebounding viscosity and short measure validity period, and the normal hydrothermal catalytic pyrolysis technology has limited effect during the heavy oil recovery process can be solved.