However, the values of porosity and permeability derived from NMR logging are lower than the real values because the heavy oil has lower hydrogen index and higher viscosity.
但由于稠油粘度大,含氢指数低,也造成核磁共振测井的孔隙度、渗透率偏低。
The classical elasticity mathematics theory was established for ideal medium abiding Hooke law grimly, the earth medium is a viscoelastic medium with viscosity in fact, so elastic wave equation can not be used to describe the propagation of seismic waves in real media.
经典弹性数学理论是对精确遵守虎克定律的理想介质建立的,而实际大地介质是具有粘滞性的粘弹性介质,所以完全弹性波动方程不能够准确地描述地震波在实际介质中的传播过程。
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