Supercritical carbon dioxide wellbore multiphase flow simulation test device

Abstract

The invention discloses a supercritical carbon dioxide shaft multi-phase flow simulation test device mainly comprising a shaft multi-phase flow simulation test bench, a carbon dioxide storage tank, a booster pump, a heater, a separator, a cooler and the like which form a main circulating loop. According to the supercritical carbon dioxide shaft multi-phase flow simulation test device, a simulation shaft is visualized through a window design, so that the flow pattern and flow state of supercritical carbon dioxide shaft annular multi-phase flow can be tested by an external instrument; the supercritical carbon dioxide shaft multi-phase flow simulation test device can carry out real-time acquisition and analysis to pressure, temperature, flow, solid-phase concentration, supercritical carbon dioxide annular flowing rate, solid-phase particle speed and the like together with an external measuring instrument; and during a test, the circulating use of supercritical carbon dioxide can be realized. The supercritical carbon dioxide shaft multi-phase flow simulation test device has wide purposes, not only can take a supercritical carbon dioxide shaft multi-phase flow test, but also can take a multi-functional expansion test.

Description

technical field [0001] The invention relates to the technical field of drilling and completion of oil and natural gas wells and well flushing and sand washing of oil and gas wells, in particular to a simulation test device for supercritical carbon dioxide wellbore multiphase flow. Background technique [0002] Under the current situation of energy shortage, in order to ensure my country's energy security, it is necessary to form new methods and develop new technologies to effectively improve the efficiency of exploration and development of oil and gas resources. Supercritical carbon dioxide fluid not only has the characteristics of low viscosity and easy diffusion of gas, but also has the characteristics of high density and good solubility of liquid. However, the current research on supercritical carbon dioxide drilling and completion technology and well washing and sand washing technology has just started, and a lot of basic theoretical research needs to be carried out....

AI Technical Summary

Problems solved by technology

However, the existing conventional fluid drilling and completion and sand flushing test devices have the following deficiencies: the working pressure or temperature is too low to meet the basic conditions required for the modulation and work of supercritical carbon dioxide; the internal pressure and temperature of the wellbore The parameters cannot be precisely controlled, and it is impossible to simulate the precise transition of the supercritical carbon dioxide fluid state during the actual drilling, completion and sand flushing process; the measurement equipment is poorly targeted, and cannot accurately reflect the parameter changes during the flow of supercritical carbon dioxide along the wellbore annulus in real time ; When the multiphase flow in the wellbore annular space is involved, it is impossible to accurately measure the parameters such as the solid phase content and the solid phase migration speed in the annular space in time

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