CAJ | 학술논문

在非均匀粘弹性介质中,地震波衰减研究能够有效揭示地层吸收特性对地震波的影响.这里从单程波方程出发,结合粘弹性介质中的复波数理论,考虑介质的横向变化,采用分步傅立叶波场延拓技术,推导出适用于横向变速介质的带Q地震记录计算公式,最后将此方法应用于四个不同含Q地层模型.试验表明:单程波法计算速度快,波场信息简单清晰,易于深入分析和反演算法的建立.并且, Q值对地震波波形、能量、频率等都产生了较为明显的影响,对实际资料能量补偿、地震资料分辨率的提高,以及利用衰减特征进行储层识别有一定指导价值.
재비균균점탄성개질중,지진파쇠감연구능구유효게시지층흡수특성대지진파적영향.저리종단정파방정출발,결합점탄성개질중적복파수이론,고필개질적횡향변화,채용분보부립협파장연탁기술,추도출괄용우횡향변속개질적대Q지진기록계산공식,최후장차방법응용우사개불동함Q지층모형.시험표명:단정파법계산속도쾌,파장신식간단청석,역우심입분석화반연산법적건립.병차, Q치대지진파파형、능량、빈솔등도산생료교위명현적영향,대실제자료능량보상、지진자료분변솔적제고,이급이용쇠감특정진행저층식별유일정지도개치.
The seismic wave attenuation study in non-uniform viscoelastic medium could reveal how absorption influences the characteristics of seismic waves. Based on the one-way wave equation, combining with viscoelastic media complex wave number theory, considering lateral variation and using split-step Fourier wave field continuation techniques, a seismic records formula concluding Q has been established which is suitable for the horizontal transmission medium. This method has been applied to four different Q-bearing models. The result shows: one-way wave equation has fast computed-speed, clear and simple wave field which is easy to analysis and establish the inversion algorithm; Q value effects the seismic waveform, energy, frequency and so on, which benefit the further research such as seismic energy compensation, improvement of seismic resolution, concealed reservoir discrimination.