Hydrocarbon recognition based on spectrum absorption characteristics of reservoir
Diao Rui1,3, Feng Yu-ping2
1. Geophysical Research Institute,Shengli Oil Field Branch,Sinopec,Dongying, Shandong 257022, China;
2. Geophysical Exploration & Development Corporation,Shengli Oil Field Branch,Sinopec,Dongying, Shandong 257086, China
Abstract：Improved generalized S transform of window function normalized energy improves the frequency resolution with time resolution not lowering at the same time.Through the forward modeling of visco-elastic wave equation,we discuss in this paper spectrum absorption characteristics of reservoir based on improved generalized S transform.When seismic waves pass through reservoir,high frequency energy attenuation is more severe than low frequency.So spectrum absorption characteristics show that low frequency energy is relatively augmented,and high frequency energy relatively diminished.The spectrum absorption characteristics can indicate the concentrated degree of petroleum in reservoir.The frequency spectrum analysis of model data and real seismic data near wells proves the effectiveness and feasibility of this method.
