A carbon dioxide anhydrous fracturing fluid conductivity test system

Abstract

A carbon dioxide anhydrous fracturing fluid conductivity test system, including a gas purifier, the inlet of the gas purifier is connected to more than two gas cylinders, the outlet of the gas purifier passes through the flow meter and the liquid CO2 storage tank in the refrigeration system The outlet of the liquid CO2 storage tank is connected to the inlet of the one-way valve through the CO2 pump; the outlet of the reagent tank equipped with a vent valve is connected to the inlet of the one-way valve through the reagent pump, and the outlet of the one-way valve is connected to the inlet of the mixer. The outlet of the pump is connected in turn through the safety valve, the preheater and the inlet of the diversion chamber, the outlet of the diversion chamber is connected through the third pressure gauge and the back pressure valve, and the outlet of the third pressure gauge is connected with the vacuum pump branch and the fracturing fluid recovery branch. There is a differential pressure sensor connected to the inlet and outlet of the diversion chamber. The present invention can simulate and test the effect of different additive ratios, different temperatures, different pressures and different flow velocities of carbon dioxide anhydrous fracturing fluid on the pressure of adding various proppants. Conductivity in case of cracks.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide anhydrous fracturing, in particular to a carbon dioxide anhydrous fracturing fluid conductivity test system. Background technique [0002] With the continuous deepening of the understanding of unconventional oil and gas reservoirs, carbon dioxide water-free fracturing technology has attracted the attention of researchers from all walks of life due to its "water-free fracturing" characteristics. CO 2 Waterless fracturing technology mainly uses CO 2 Anhydrous fracturing fluid (mainly composed of liquid CO 2 Formed by mixing with a very small amount of chemical additives) instead of traditional water-based fracturing fluid for reservoir stimulation, while improving the effect of volume fracturing, it can effectively protect the reservoir and save a lot of water resources. [0003] However, on-site operations often require the measurement of CO 2 Key fluid parameters of anhydrous fracturing...

AI Technical Summary

Problems solved by technology

However, the current industry commonly used fracturing fluid conductivity testing instruments, such as the FCES-100 fracture diversion instrument produced by Core-Lab in the United States, are mainly used for conventional liquid fracturing fluids, such as jelly fracturing fluid or clear water fracturing fluid , for specifically testing this CO 2 The system and equipment for the diversion capacity of water-free fracturing fluid have not yet matured for sale in the market

Images