化工矿产地质
化工礦產地質
화공광산지질
GEOLOGY OF CHEMICAL MINERALS
2015年
1期
51-54
,共4页
叠前时间偏移%煤层倾角小%三维地震
疊前時間偏移%煤層傾角小%三維地震
첩전시간편이%매층경각소%삼유지진
prestack time migration%small inclination angle coal seam%3D seismic prospecting
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。
在煤層傾角小的山西潞安常村礦S7採區三維地震勘探時，採用疊前時間偏移，可剋服非同相疊加給後續偏移帶來的痳煩，先進行偏移處理使波場歸位，再把同一地下點的偏移波場相疊加。疊前時間偏移適用于陡傾角構造等複雜地質體的成像，所得數據體相對于疊後時間偏移數據體，反射波空間歸位更準確，繞射波收斂更徹底，構造清晰、自然，波組關繫閤理，波組特徵明顯。
재매층경각소적산서로안상촌광S7채구삼유지진감탐시，채용첩전시간편이，가극복비동상첩가급후속편이대래적마번，선진행편이처리사파장귀위，재파동일지하점적편이파장상첩가。첩전시간편이괄용우두경각구조등복잡지질체적성상，소득수거체상대우첩후시간편이수거체，반사파공간귀위경준학，요사파수렴경철저，구조청석、자연，파조관계합리，파조특정명현。
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.
