Method and device for obtaining wellbore temperature field in hot water circulation heating viscosity reduction process

Abstract

The invention relates to a wellbore temperature field obtaining method and device for a hot water circulating heating viscosity reduction process. The method includes the steps that data parameters are determined; the data parameters are utilized to obtain the stratum heat resistance, the cement ring heat resistance, the casing pipe wall heat resistance, the thermal convection liquid heat resistance between liquid and the inner wall of a casing pipe, the heat convection heat resistance between the air and the inner wall of the casing pipe, the heat conduction heat resistance between the inner wall and the outer wall of an oil tube, the heat convection heat resistance between crude oil and the inner wall of the oil tube, the heat convection heat resistance between the inner wall and the outer wall of a hollow rod, the heat convection heat resistance between thermal fluid and the inner wall of the hollow rod, the heat convection heat resistance between the inner wall and the outer wall of an inner tune and the heat convection heat resistance between the thermal fluid and the inner tube; the radial heat loss of a wellbore unit of unit length is determined through the heat resistance information; the inner tube hot water temperature field, the hollow rod hot water temperature field and the temperature field of crude oil in the oil tube are determined under the conventional water injection and / or inverse water injection situation through the radial heat loss of the wellbore unit of the unit length.

Description

technical field [0001] The invention relates to the technical field of heavy oil lifting, in particular to a method and device for obtaining a wellbore temperature field in a hot water circulation heating viscosity reduction process. Background technique [0002] The electric heating technology is to install a heating cable into the hollow sucker rod, so that the hollow sucker rod and the heating cable form a skin effect heating body, and use the skin effect heating principle to reduce the viscosity of crude oil in the wellbore. Electric heating technology plays a significant role in the production of heavy oil blocks in oil production plants due to its characteristics of simple surface management, convenient maintenance and high thermal efficiency. It is one of the main technologies for wellbore viscosity reduction in heavy oil blocks. [0003] With the continuous development of heavy oil blocks, the problem of high energy consumption caused by large-scale application of el...

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Problems solved by technology

Through searching a large number of documents and materials, there is no similar calculation method at present, so it is impossible to accurately predict the key parameters of the double-layer hollow sucker rod hot water circulation heating viscosity reduction process

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