石油工业技术监督

在海洋油气钻井工程中，气体上窜是导致井涌和井喷的重要因素，严重威胁钻井安全。准确分析气体上窜速度的关键影响因素对于优化钻井液性能、提高井控措施具有重要意义。基于Fluent数值模拟方法，研究了气体入口速度对气体上窜速度的影响。研究结果表明，随着气体入口速度的增加，井筒内气体上窜速度呈非线性增长特征。当入口速度由0.10 m/s增加至0.40 m/s时，气体上窜速度由0.16 m/s提升至0.35 m/s，表明入口速度对气窜行为具有显著的放大效应，是决定气体迁移速率的主导因素。该研究为高效防气窜钻井液的优化设计提供了理论支持。

In the offshore oil and gas drilling engineering, gas upwelling is an important factor that causes blowout and well surge, which seriously threatens the drilling safety. Accurate analysis of the key factors affecting gas upflow velocity is of great significance for optimizing drilling fluid performance and improving well control measures. Based on the Fluent numerical simulation method, the influence of the gas inlet velocity on the upward rush velocity of the gas was mainly studied. The research results show that with the increase of the gas inlet velocity, the upward flow velocity of the gas in the wellbore presents a nonlinear growth characteristic. When the inlet velocity increases from 0.10m/s to 0.40m/s, the upward flow velocity of the gas rises from approximately 0.16m/s to 0.35m/s, indicating that the inlet velocity has a significant amplification effect on the gas flow behavior and is the dominant factor determining the gas migration rate.This study provides theoretical support for the optimization design of high-efficiency anti-gas flow drilling fluid.