Nanoparticle-enhanced foam generating device for unconventional gas reservoir fracturing and its application

Abstract

The invention discloses a nano particle reinforced foam generating device for unconventional gas reservoir fracturing and its application. The structure of the foam generating device is as follows: the foam base liquid ultrasonic dispersing part includes an ultrasonic vibration rod, an oscillation tube and a cluster tube, the vibration tube surrounds the surface of the ultrasonic vibration rod, is connected with the cluster tube, and the cluster tube is fixed on the inner tube; the gas-liquid The mixing part includes turbine blades, gas injection balls and gas distribution pipes, the gas distribution pipes are connected to the gas injection balls, and the surface of the gas injection balls distributes injection holes; the nanoparticle-enhanced foam generation part includes multiple oscillation units, and each oscillation unit includes an inner tube, Ultrasonic vibration short joint and foam filter. The invention fully oscillates and mixes the foam base liquid through the oscillating tube, so that the nanoparticles can be uniformly dispersed in the foam base liquid, and the number of oscillation units can be adjusted according to the needs to complete multi-stage ultrasonic oscillation, so that the gas and the foam base liquid are fully mixed to form dense, uniform and stable The nano-particle-enhanced foam fracturing fluid is helpful for the fracturing stimulation of unconventional gas reservoirs.

Description

technical field [0001] The invention relates to a nanoparticle-enhanced foam generating device for unconventional gas reservoir fracturing and its application, and belongs to the technical field of manufacturing and application of shale gas mining equipment and coalbed gas fracturing stimulation equipment. Background technique [0002] my country is rich in unconventional gas resources such as shale gas and coalbed methane, and its exploitation potential is huge. However, due to the complex geological conditions of shale gas reservoirs and coalbed methane reservoirs, the physical properties of reservoirs are generally poor, and it is generally difficult to form high-permeability channels, which determines that fracturing stimulation is a necessary choice for their efficient development. Foam fracturing fluid is an unconventional gas reservoir development fracturing fluid system with excellent performance. Foam fracturing fluid has the advantages of high viscosity, strong san...

AI Technical Summary

Problems solved by technology

Stirring and mixing of traditional foam generators is difficult to uniformly disperse the nanoparticles in the foaming agent solution, and cannot provide enough energy for the nanoparticles to adsorb on the gas-liquid interface, making it difficult to form a stable foam fracturing fluid

In addition, large nanoparticle aggregates will block the tiny pore throats of unconventional gas reservoirs and cause damage to the reservoir

At present, there are no research reports on nanoparticle-enhanced foam generators

Images