WITHDRAWN: Impact pressure characteristics of carbon dioxide phase transition fracturing technique
Year: 2024
Type: preprint
Abstract: Carbon dioxide (CO 2 ) phase transition fracturing is widely regarded as a promising coal seam mining technology because it can effectively enhance the permeability of coal pore structure and prevent gas outbursts. A CO 2 phase transition impact pressure test system was designed and developed, and the effects of different factors on phase transition impact pressure were investigated by combining CO 2 release experiments and smoothed particle hydrodynamics (SPH) numerical simulation. In addition, based on the Peng-Robinson (P-R) equation and the pipeline pressure drop formula, new mathematical models of the pressure in the buffer tank and the velocity of gaseous CO 2 at the nozzle were obtained. The results show that the CO 2 phase transition impact pressure can divided into rapid boost, fluctuation, and attenuation stages. The impact distance and impact angle have the most significant effects on pressure. The model of the pressure in the buffer tank and the velocity of gaseous CO 2 at the nozzle well-simulated the experimentally obtained impact pressure curves of CO 2 . The impact results can be applied to reference for the application of CO 2 phase transition fracturing technology.
Source: Research Square
Institution: China University of Geosciences
Language: English
Subfield: Fuel Technology
Field: Energy
Domain: Physical Sciences
SDG: Climate action
Open Access status: green
OpenAlex ID: W4391685488