Under Working Conditions CO₂ Injection Flow Field And Flow Pattern Of The Impact Analysis Tool Design

Using CO₂ as a liquid injection flooding, can reduce the viscosity of hydrocarbon reservoirs, increase the amount of recoverable oil trap. A large number of foreign mineral application shows, CO₂ injection for enhanced oil production has a significant role. The results show that, compared with no CO₂ injection, injection of CO₂ production can be increased by 43% to 58%.Because of CO₂ is very low viscosity, high sensitivity displacement front of viscous fingering, viscous fingering of CO₂ injection, bypassing the oil phase causing the phenomenon of channeling. When the pressure gradient the same time, CO₂ than oil and water move faster. So, viscous fingering not only reduces the sweep efficiency, causing premature breakthrough and premature output CO₂, but also to some extent, affected the formation of miscible leading edge.Layered injected CO₂ is a better way to solve the above problems can be solved interlayer contradictions between different strata in the gas injection process to achieve different permeability formations efficiently injected. But stratified injection wells currently designed with a single nozzle pressure, can not meet the actual situation of a plurality of pressure required, works with want to get a series of pressure nozzle. In addition, the current distribution nozzle aperture is too small, easy to plug. If equipped with the nozzle aperture becomes larger, with the nozzle in accordance with the existing design, which throttle pressure is too small, can not meet the required engineering. Without changing the length of the nozzle with the case, by designing the nozzle with internal structure, so that the pressure difference with the nozzle to meet the actual needs of the project, as well as meet the corresponding flow requirements（large flow area）, which is a Production Engineering meaningful work.This project by studying existing hydraulic characteristics with the nozzle, with the nozzle have a summary of the general characteristics of the hydraulic laws appear, found insufficient existing distribution nozzle design, so as to improve the design with the nozzle guide. By improving the existing distribution nozzle structure, we can achieve the desired large flow area, high pressure closure design requirements, this project is one of the elements to be studied. In addition, by improving the existing distribution in the nozzle without achieving the desired design requirements of the situation, whether to re-design a completely new type of nozzle with such new designs feature nozzle to achieve the required project design requirements, but also The project needs to study one of the elements.