【摘要】 由于本文研究对象处在T4(3200m)以上,地层构造相对平缓,速度场空间变化较小,断裂或裂缝方向发育单一,因此从VTI介质和HTI介质的假设条件出发,研究了利用三维VSP数据和地面地震数据联合求解各向异性参数的方法,分析了HTI介质的空变特点。研究结果表明:研究区的介质具有明显的VTI性质和HTI特点,通过求取VTI各向异性参数和分析HTI介质的空间相对变化,获得了较小的地震波旅行时时差。根据HTI介质空间相对变化与实际裂缝空变具有一定的一致性的特点,可进行裂缝储层的有效预测。更多还原

【Abstract】 The target zone in this paper is above T4 (3200ms),the stratum-structure is relatively flat,and there is not much change for velocity field,and the faults and fractures develop in one direction,based on the hypotheses of VTI media and HTI media,the method of integrating 3D VSP data with surface seismic data to solve anisotropic parameters is studied in this paper,and the characteristics of the spatial change for HTI media was analyzed. The study results show that the media in the study area obviously have the VTI properties and HTI features,by estimating VTI anisotropic parameters and analyzing HTI spatial relative change,less seismic wave travel time difference was obtained. Based on consistence characteristic between space relative change for HTI media and space change for real fractures,the fracture reservoir can be effectively predicted.更多还原