各种油气生产作业对储层条件和地震特性的影响列于表1中。对地震特性有极大影响的储层条件(孔隙压力、有效压力和气饱和度)显得尤其重要。大多数生产作业会改变孔隙压力和有效压力,从而引起地震特性的变化。某些生产作业会提高气饱和度,而某些生产作业会降低气饱和度。正如大家熟知的加斯曼方程所述的那样,地震速度在最初10％左右的气饱和度 The effects of various hydrocarbon production operations on reservoir conditions and seismic characteristics are summarized in Table 1. Reservoir conditions (pore pressure, effective pressure and gas saturation), which have a great influence on seismic characteristics, are of particular importance. Most production operations change pore pressure and effective pressure, causing changes in seismic characteristics. Some production operations increase gas saturation, while some production operations reduce gas saturation. As we all know, the Gasman equation states that the seismic velocity is about 10% of the initial gas saturation