挥发性油田压力曲线特征及分析

Pressure Curve Features and Its Analysis of Volatile Oilfield

方法 针对多孔介质中挥发性油渗流问题开展了研究 ,根据伴有相变过程的气液两相渗流的理论 ,建立了相应的压力特征方程 ;描述了挥发性油井在脱气渗流过程中压力随时间和距离的变化规律 ;给出了无限大油藏以定量生产情况下的解析解。目的 完善这一渗流力学的理论和试井分析方法。结果 气体挥发对多孔介质中流体的渗流有较大影响 ,挥发强度越大 ,压力曲线上翘幅度越大。结论 对于挥发性较强的油田和油井 。

Based upon existing theory relating to gas-liquid two phase percolation with phase changes, volatile oil percolation in multi-porous media is carried out and typical pressure equations are developed for the same. In addition, pressure change of volatile oil well with time and distance during degassing percolation is presented. Solution to quantitative production for infinite reservoir is also given. Purpose\ To improve percolation theory in this respect and well test analysis method. Result\ Volatility of gas has great effect on the percolation of fluids in multi-porous media. The greater the volatility, the greater upper curvature of pressure curve. Conclusion\ It is necessary to consider the phase change features for oilfield and wells producing oil of great volatility. \;