【摘要】 依据Kirchhoff积分法叠前时间偏移处技术的基本原理,探讨了该技术的实现方法及技术特点,并对其叠前去噪、振幅补偿、反褶积、多次波衰减、均方根速度场求取与优化、偏移孔径选取等关键技术的使用条件进行了系统分析。通过实际资料处理结果对比可知,Kirchhoff积分法叠前时间偏移比叠后时间偏移处理结果包含的地震信息更加丰富,复杂构造区成像更好,断层及断点空间位置更准确。应用效果表明,在地层横向速度变化不大的情况下,三维地震叠前偏移技术是解决煤矿采区陡倾角复杂构造成像问题的有效方法。更多还原

【Abstract】 Based on basic principle of the Kirchhoff integral prestack time migration processing technology,discussed realization way and technical characteristics of the technology and systematically analyzed operating conditions of key technologies including prestack denoising,amplitude compensation,deconvolution,multiple wave attenuation,root-mean-square velocity field extraction,optimization and aperture selection etc.Through actual data processed results comparison can see,seismic information in prestack time migration processed result is more abundant than that of poststack time migration processed result,better imaging in complicated structure areas,more accurate fault spatial locations.The application effects have demonstrated that,in condition of strata transverse velocity variation is moderate,the 3D seismic prestack time migration technology is an effective method to solve coalmine winning district steep dip angle complicated structure imaging issue.更多还原