Numerical Simulation for Gas-Liquid Two-Phase Flow along the Borehole after Air Cutting

Abstract:

When gas kick Occurs during drilling, because of pressure, temperature, coefficient of gas compressibility and other parameters changing continuously, gas will slip along the borehole and also accompany expansion some extent, and bottom hole differential pressure increases, resulting in the amount of invasion gas increasing continuously until blowout. The procedure of gas kick till blowout in the borehole is transient gas-liquid two-phase flow, studying on The development of gas-liquid two-phase flow parameters variation characteristics and bottom hole pressure variation characteristics plays an significant role to understand blowout occurrence and development characteristics. This paper using methane-mud as the circulating medium simulates the procedure of gas kick till blowout near the bottom under the condition which is almost the onsite drilling process, Analyzing the flow pattern, bottom hole pressure variation characteristics, and velocity distribution under the different stages of gas kick, different influx, and obtained an initial understanding.

• Periodical: Advanced Materials Research (Volumes 821-822)
• Pages: 1414-1417
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.821-822.1414
• Online since: September 2013
• Authors: Xiao Feng Sun, Jun Bo Qu, Tie Yan, Li Wang
• Keywords: Gas Kick, Gas Kick Simulation, Numerical Simulation, Well Control

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