Method and system for determining wellbore temperature field distribution based on hollow rod electric heating

Abstract

The invention provides a method and system for determining the temperature field distribution of a wellbore based on electric heating of a hollow rod. The method includes: acquiring data related to the electric heating of the hollow rod and the wellbore; The depth setting step; according to the step, the wellbore is divided into multiple wellbore sections; the temperature of the liquid in the multiple wellbore sections is determined respectively according to the data; the multiple wellbore The temperature of the liquid in the section constitutes the distribution of the wellbore temperature field. The distribution of wellbore temperature field is determined, which provides a data basis for the subsequent selection of reasonable electric heating power to meet the existing heavy oil, extra heavy oil and super heavy oil production.

Description

technical field [0001] The present invention relates to the technical field of oil and gas field exploration, in particular to the lifting technology of heavy oil, extra heavy oil and super heavy oil, specifically a method and system for determining the temperature field distribution of a wellbore based on hollow rod electric heating. Background technique [0002] During the production of heavy oil, extra heavy oil and super heavy oil, as the temperature drops, the viscosity of crude oil increases continuously as it flows upward along the wellbore. When the temperature is lower than a certain level, the flow of crude oil basically stops, and the phenomenon of crude oil hanging on the wall occurs, which makes it more difficult to lift, so that normal production cannot be performed. [0003] During wellbore lift, viscosity is greatly affected by temperature. Hollow rod electric heating technology is a commonly used and mature method for heating high-condensation oil and heavy...

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Problems solved by technology

[0006] In order to solve the problem that the hollow rod electric heating technology in the prior art cannot determine the wellbore temperature field, and it is difficult to choose a reasonable electric heating power, which cannot satisfy the existing heavy oil, extra heavy oil and super heavy oil production, this paper The invention provides a method and system for determining the temperature field distribution of the wellbore based on the electric heating of the hollow rod, which is an accurate solution for determining the temperature field distribution of the wellbore based on the electric heating of the hollow rod. By obtaining the data related to the electric heating of the hollow rod and the wellbore According to the set step length, the wellbore is divided into multiple wellbore sections, and the temperature of the liquid in each wellbore section is determined in turn. In this way, the temperature field distribution of the wellbore is obtained, and a reasonable electric heating power is selected for the follow-up to meet the existing heavy oil pressure. , extra-heavy oil and super-heavy oil production provide a data basis

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