【摘要】 利用弹性波动方程进行了非零偏移距VSP波场的数值模拟,通过偏振投影和中值滤波技术相结合进行波场分离,对分离后的反射P波和透射PS波利用动校正(NMO)和VSPCDP叠加技术进行成像。成像结果表明:透射PS波成像与反射P波成像具有同样良好的效果,而且透射PS波成像是反射波成像很好的补充。利用透射PS波成像不需要增加数据采集的成本,所以透射波成像技术将会在石油工业中被广泛采用。更多还原

【Abstract】 This paper illustrates the numerical modelling of offset VSP by using the elastic wave equation,wave-filed separation by using the polarized projection and median filtering,PS-waves and reflected P-waves’ depth-domain imaging techniques-moveout correction and VSPCDP stacking.From the two waves’ imaging,we can see that transmitted PS-waves imaging is as well as reflected P-waves imaging,and transmitted PS-waves imaging is the best addition of reflected P-waves imaging.Moreover,using transmitted PS-waves imaging isn’t added extra data acquisition cost,so transmission imaging techniques will become widely adopted by the oil industry.更多还原