叠前时间偏移技术在煤层倾角小的潞安常村矿S7采区三维地震勘探中的应用
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摘要
在煤层倾角小的山西潞安常村矿S7采区三维地震勘探时,采用叠前时间偏移,可克服非同相叠加给后续偏移带来的麻烦,先进行偏移处理使波场归位,再把同一地下点的偏移波场相叠加。叠前时间偏移适用于陡倾角构造等复杂地质体的成像,所得数据体相对于叠后时间偏移数据体,反射波空间归位更准确,绕射波收敛更彻底,构造清晰、自然,波组关系合理,波组特征明显。
Using prestack time migration technique can overcome the trouble from non in-phase prestack when we use 3D seismic prospecting of small inclination angle coal seam in Luan Chang village camp.Woe should first conduct migration processing to make field return,and then stack the same migration wave field of subsurface point.prestack time migration technique apply to complex geologic body imaging with steep dip angle.relative to Post-stack time migration data the data is more correct,the convergency of diffracted wave is more thorough,the structure is distinct and nature and the wave groups is reasonable with distinguished features.
引文

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