Abstract:The paper used the random medium model and non-homogeneous elastic equation to carry out systematic forward modeling and a lot of theoretical analysis.The results of forward modeling provided a solid basis for study of detectability of caves and study of characteristic seismic response to fluid-filling caves.The study showed that using the seismic data with ordinary frequency band (dominant frequency is 20一40Hz)can detect the caves having 2一15m in height of fluid-filling caves,determine its spatial distribution and boundary and evaluate its height.Under the condition of ordinary band(20一40Hz)and that the height of caves changes within the scope of 2一15m,the height of caves has a little influence on the amplitude of vertical component of diffraction and hardly on its horizontal component.The forward modeling technique using the random medium model and non-homogeneous elastic equation can do forward modeling of super miniature(100m grade)caves having any forms,which provides a reliable method for forward modeling of non-regular.heterogeneous and super miniature geologic body that is similar to the caves.
姚姚, 唐文榜 . 深层碳酸盐岩岩溶风化壳洞缝型油气藏可检测性的理论研究[J]. 石油地球物理勘探, 2003, 38(6): 623-629.
Yao Yao. Theoretical study of detectable cavern-fractured reservoir in weathered Karst of deep carbonatite. OGP, 2003, 38(6): 623-629.