Variable-temperature-field displacement simulator for multi-thermal fluid

Abstract

The invention provides a variable-temperature-field displacement simulator for a multi-thermal fluid, which comprises a one-dimensional sand pack, a sand bath, an oil bath circulatory system and an oil bath temperature adjusting system, wherein the one-dimensional sand pack is filled with experimental oil sand or quartz sand so as to simulate the physical characteristics of an oil reservoir; the sand bath is filled with quartz sand or oil reservoir sand so as to simulate the physical environment of the reservoir; the oil bath circulatory system is used for adjusting the temperature of the outer boundary of the sand bath; and the oil bath temperature adjusting system is used for calculating and following up the temperature of the oil bath circulatory system automatically according to the heat conduction in the sand bath and the oil bath circulatory system. The variable-temperature-field displacement simulator for the multi-thermal fluid solves the problems of various unreasonable conditions, modes and methods existing in experimental modes that an experimental body is placed in high-temperature isoperibol for reservoir oil displacement of the multi-thermal fluid and are adopted in heavy oil thermal recovery simulation experiments in the conventional petroleum industry, and improves the similarity between indoor experimental conditions and the field, thereby enhancing the reliability degree and the reference value of experimental results.

Description

technical field [0001] The invention relates to a device for multi-element thermal fluid flooding experiment, in particular to a variable temperature field multi-element thermal fluid displacement simulation device. Background technique [0002] At present, in the physical simulation experiments involved in the petroleum industry, the existing conventional methods are carried out in a constant temperature environment. Before the displacement, the ambient temperature is raised to the experimental temperature, and then the displacement experiment is carried out with saturated crude oil. This conventional method has the following three shortcomings: 1) It cannot form a temperature field in the displacement direction, and cannot reflect the heat conduction phenomenon that occurs in the actual reservoir development. There is often a temperature difference between reservoir rocks, and the heat conduction caused by the temperature difference is particularly obvious in the thermal r...

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Problems solved by technology

This conventional method has the following three shortcomings: 1) It cannot form a temperature field in the displacement direction, and cannot reflect the heat conduction phenomenon that occurs in the actual reservoir development. There is often a temperature difference between reservoir rocks, and the heat conduction caused by the temperature difference is particularly obvious in the thermal recovery of heavy oil; 2) Temperature affects the viscosity of crude oil and the properties of the oil-water interface, and conventional methods cannot control the influence of temperature on crude oil and injected fluids. 3) Most of the pressure and temperature in conventional oil displacement experiment methods cannot realize multi-point real-time automatic collection and storage

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