孔隙流体地震特性的计算

Computation of seismic properties of pore fluid

1. 大庆石油学院勘探系,安达151400;2. 大庆石油管理局,大庆163453

Geophysical Department, Daqing Petroleum College, Anda 151400

孔隙流体对岩石地震特性的影响为采油地震监测的物理基础,搞清地层条件下孔隙流体地震特性的变化规律对提高地震监测的精度具有重要的意义。在收集、分析前人研究结果的基础上,本文导出了当地层压力从高于饱和压力降低到低于饱和压力时,从原油中所脱出的游离气的体积百分含量计算式,并计算和分析了不同温度压力下原油、油气混合物以及地层水的地震特性。

Effects of pore fluid on seismic properties of rock are the basis of monitoring oil recovery using seismic method. For this reason, the variation pattern of pore fluid is of great importance to accurate seismic monitoring of oil recovery performance. By comprehensively analyzing previous authors' results, the formula calculating the volume percent content of free gas overflowing from crude oil was derived when reservoir pressure decreases from higher than bubble point pressure to lower. Some new conclusions have been reached by calculating and analyzing for the seismic properties of crude oil, mixture of oil and gas, and formation water at different temperatures and pressures.