测井与全方位道集联合各向异性参数建模及成像

对于TTI介质各向异性成像，精确的各向异性参数估算与建模至关重要。在当前计算机硬件迅速发展及宽方位地震数据采集日益普及的情况下，成像必须考虑介质的各向异性。提出了基于测井数据与全方位角道集联合的各向异性参数建模方法，该方法先采用Walk-away VSP资料及测井数据可获得井位置点的各向异性参数δ，借助全方位共反射角道集，可获得与方位有关的各向异性时差信息。再采用全方位层析对各向异性速度、各向异性参数ε和δ进行迭代优化，建立精确的各向异性参数模型，可有效减少各向异性参数的多解性。通过实际地震数据对此方案进行了验证，该方法在裂缝探测及地震成像方面有较好的适用性。

Well constrained anisotropic velocity model building based on full-azimuth angle gathers and imaging

For TTI media anisotropic imaging, accurate anisotropy parameter model building is very important. Anisotropy must be considered in seismic imaging with the rapidly development of wide-azimuth acquisition. A set of joint model building method based on well data and full-azimuth angle gathers were proposed. First, Walkaway VSP data and well data can be used to obtain the anisotropy parameters δ volume. Full azimuth angle gathers can be used to obtain RMO information on the anisotropy. Based on well data and full-azimuth angle gathers, anisotropic parameters ε and δ iterative optimization process were established. The proposed solution was tested on field seismic data and the results showed favorable effect in fracture detection and seismic imaging which proved the applicability and effectiveness of the proposed method.