An experimental device and method for detecting and tracking the thermal effect of high-pressure air injection oxidation

Abstract

The invention discloses a high pressure injected air oxidation heat effect detecting and tracking experimental device and a method. The device comprises an injection system, an experimental model system, a data collecting and controlling system, a gas phase output system, a liquid phase output system, a gas phase analysis system, a liquid phase analysis system, a personal computer (PC) controlling system and a constant temperature oven, wherein one end of the injection system is connected with the controlling system, the other end of the injection system is connected with the inlet end of the model system; the output end of the model system is connected with the gas phase output system used for collecting residual air samples and the liquid phase output system used for collecting oxidized oil samples; the gas phase output system and the liquid phase output system are arranged in a parallel connection manner; the output end of the gas phase output system is connected with the gas phase analysis system; Oil samples collected by the output end of the liquid phase output system is connected with the liquid phase analysis system; temperature probes on two ends of the experimental model system and a heating band at the inner internal wall of the experimental model system are respectively connected with the data collecting and controlling system. The experimental model system is evenly provided with the temperature probes, the heat effect change at the internal part of an oxidation tube can be detected in real time by the data collecting and controlling system, so that the accuracy of result analysis is ensured.

Description

technical field [0001] The invention relates to an experimental device and method in the field of petroleum development, in particular to an experimental device and method for detecting and tracking the thermal effect of high-pressure air injection oxidation. Background technique [0002] Since the 1980s, in situ combustion (in situ combustion) thermal recovery technology has received widespread attention and has been applied in some oil fields. The in-situ combustion technology is to first inject air into the formation, and then ignite a small part of the formation crude oil to undergo a combustion reaction. The oxygen in the air is consumed, and the generated flue gas can displace part of the crude oil. The heat causes the temperature in the formation to rise thereby reducing the viscosity of the heavy oil in the formation and increasing its mobility. With the development of in-situ combustion technology, the academic circles gradually began to pay attention to the oxidat...

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Problems solved by technology

The above method provides a device that can be used in crude oil oxidation experiments by air injection, which meets the needs of crude oil oxidation experiments to a certain extent. However, there are still some deficiencies in the existing experimental methods and devices for the research on the thermal effect of air injection oxidation: 1) cannot accurately Real-time measurement of air flow and air volume. Because the oxidation thermal effect of quantitative crude oil is affected by the oxidation process and air volume, it is impossible to accurately study the variation law of crude oil oxidation thermal effect; 2) Constant system pressure or constant air flow cannot be achieved during the dynamic oxidation reaction process 3) It is impossible to accurately detect and track the temperature and pressure changes during the oxidation reaction process, and the thermal changes detected by the temperature probe cannot reflect the oxidation of crude oil from the core zone to the oxidation process. The thermal effect changes at the edge; 4) The automation of the whole process of the experiment is not high, and the self-tracking collection of data cannot be realized, and the error is considered to be relatively large; 5) The residual volume of the gas phase after the oxidation reaction cannot be accurately measured, and the subsequent gas and liquid phases cannot be processed in time and analysis

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