【摘要】 由于尺度的限制,利用地震方法进行裂缝参数定量表征一直是地球科学的难题。基于裂缝性孔隙介质动态等效理论的频变AVAZ反演方法给出了研究思路。首先介绍了裂缝性孔隙介质的等效介质理论研究进展,分析比较了各种裂缝性储层岩石静态等效介质模型和动态等效介质模型;然后给出了基于Chapman模型的裂缝参数和渗透率定量表征的正问题数学模型以及反演问题求解的方法和策略,以及基于模型数据的数值计算结果;最后讨论了频变AVAZ反演方法目前存在的问题和进一步研究方向。更多还原

【Abstract】 It is still a challenge to use seismic method to characterize fractures quantitatively due to seismic data resolution scale.Based on dynamic effective medium modeling theory,Frequency-dependent amplitude versus angle and azimuth(FAVAZ)inversion might give a prospective solution according to recent research progress.In this paper,a survey on F-AVAZ inversion method and its application for fracture parameters characterization is displayed.Firstly,the progress on the equivalent medium theory of fractured porous medium is introduced,and the static equivalent medium model and dynamic equivalent medium model of different fractured reservoirs are compared.On the basis of Chapman effective medium modeling theory,a forward model for quantitatively predicting fracture parameters and effective permeability tensors is investigated.Then a discussion on inversion methods and strategies are given with some numerical results.Finally,some challenges for application to real seismic data are presented and some possible research clues are given for further study.更多还原