地震资料叠前时间偏移处理在徐庄煤矿西部采区的应用

在构造复杂、速度横向变化不大地区，叠前时间偏移地震资料处理已成为改善成像效果的一种有效手段。影响偏移成像效果有二：一是建立偏移速度场，二是精选偏移参数。在徐庄煤矿西部采区叠前时间偏移处理中，对影响偏移成像质量的三维克希霍夫积分叠前时间偏移参数进行了试验，选取其最佳偏移孔径、拉伸算子、反假频算子等参数。对比叠前时间偏移与叠后时间偏移效果可见，叠前时间偏移比叠后时间偏移具有较高的信噪比和分辨率，其解释的断点、断面清晰，归位准确。

Application of Seismic Data Prestack Time Migration Processing in Western Wining District of Xuzhuang Coalmine

The prestack time migration seismic data processing is already an effective means to improve imaging effect in structurally complicated, velocity transversal variation not large areas. There are two factors influencing imaging results： one is migration velocity field establishment, another is migration parameter carefully chosen. During western wining district of the Xuzhuang coalmine prestack time migration processing, tested 3D Kirchhoff integral prestack time migration parameters which impact migration imaging quality, selected optimal migration aperture, extension type operator, operator anti-abasing parameters. Contrast of prestack time migration and poststack time migration effects can see, the former has higher S/N ratio and resolution, its interpreted fault point and surface are clear and correct homing.