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

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of hydrothermal catalytic cracking dynamic simulation experiments in heavy oil layers in oil production chambers, and in particular relates to an ultrasonic-assisted hydrothermal catalytic cracking experimental device and method in heavy oil layers. Background technique [0002] With the continuous reduction of conventional oil resources and the continuous increase of world oil demand, heavy oil resources, which account for a large proportion of oil and gas resources, have been paid more and more attention. The salient features of heavy oil are high viscosity and low quality. Generally, steam injection thermal extraction is used, but the heat utilization rate is low, the recovery rate is not high, and the viscosity of heavy oil tends to rebound with the decrease of temperature, resulting in a short effective period of measures. [0003] Inspired by the oil refining process, petroleum workers at home and abro...

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Problems solved by technology

[0007] At present, there are no other reports at home and abroad on the application of ultrasonic waves to the field of heavy oil production, combined with intralayer hydrothermal catalytic cracking

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