Supercritical carbon dioxide abrasive jet flow perforation simulation experiment system

Abstract

The invention discloses a supercritical carbon dioxide abrasive jet flow perforation simulation experiment system used for simulating the processes that supercritical carbon dioxide abrasive jet flow scours broken rocks and damages a sleeve pipe, comparing and analyzing different jet flow experiment effects, revealing different factor influencing rules and the like. The supercritical carbon dioxide abrasive jet flow perforation simulation experiment system is composed of a carbon dioxide liquefying device, a supercritical carbon dioxide generating device, a supercritical carbon dioxide abrasive jet flow experiment device and a carbon dioxide recycling device, wherein the supercritical carbon dioxide abrasive jet flow experiment device is composed of a jet flow surrounding pressing barrel device and an abrasive adding device and is a kernel module of the system, supercritical carbon dioxide fluid forms jet flow when passing a sprayer, and abrasives are conveyed through a stranding cage and a sand adder to be mixed with the jet flow, so that the supercritical carbon dioxide abrasive jet flow is formed and carries out perforation inside the surrounding pressing barrel. The supercritical carbon dioxide abrasive jet flow perforation simulation experiment system is safe, simple and convenient to operate, high in efficiency and capable of simulating the perforation operation of the supercritical carbon dioxide abrasive jet flow in various work conditions and being applied to experiments of fluid like liquid nitrogen.

Description

technical field [0001] The invention relates to a supercritical fluid jet experiment system, in particular to a supercritical carbon dioxide abrasive jet perforation simulation experiment system, which belongs to the technical field of supercritical fluid and high-pressure injection technology. Background technique [0002] Unconventional natural gas reservoirs represented by shale gas, coalbed methane and tight sandstone gas will be an important supplement to my country's oil and gas resources in the future. The development of this type of unconventional gas is difficult, such as slow drilling speed, high cost, low gas reservoir permeability, long production cycle, easily damaged reservoirs, and low single well production. Therefore, conventional water-based mud and water-based fracturing fluid can no longer meet the development requirements to some extent, especially for shale gas reservoirs that exist in an adsorbed state and have a high clay content in the reservoir, wat...

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Problems solved by technology

[0005] Therefore, it is necessary to carry out basic research on the structural characteristics of supercritical carbon dioxide abrasive jets, particle following characteristics, and erosion damage effects. At present, there are no relevant reports on research results in this field. It is of great significance to carry out exploratory research on supercritical carbon dioxide abrasive jets.

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