CAJ | 학술논문

复杂构造成像已成为制约山前带地震勘探的瓶颈,传统的地震成像方法由于其自身算法及适应性的限制,在此类地区难以准确成像.对浮动面叠前深度偏移方法进行选择,从理论上分析了浮动面偏移相对于固定面偏移的优势所在,通过对Kirchhoff积分法和波动方程两种方法的综合分析,认为目前积分法在山前带叠前偏移中更加适用.最后,对山前带二维测线的偏移效果对比分析,验证了浮动面叠前深度偏移方法在山前带复杂构造成像中的有效性.
복잡구조성상이성위제약산전대지진감탐적병경,전통적지진성상방법유우기자신산법급괄응성적한제,재차류지구난이준학성상.대부동면첩전심도편이방법진행선택,종이론상분석료부동면편이상대우고정면편이적우세소재,통과대Kirchhoff적분법화파동방정량충방법적종합분석,인위목전적분법재산전대첩전편이중경가괄용.최후,대산전대이유측선적편이효과대비분석,험증료부동면첩전심도편이방법재산전대복잡구조성상중적유효성.
Complex structure imaging has become bottleneck of piedmont seismic exploration.Conventional seismic imaging method couldn't get correct imaging because of the limit of its algorithm and adaptability.This paper selects and analyzes the advantage of floating datum prestack depth migration over the mixed datum migration.By means of Kirchhoff integral method and wave equation method,it is shown that Kirchhoff integral method is more suitable for piedmont prestack migration.The correlation and analysis of the migration effect 2-D survey lines of piedmont zone indicate the effectiveness of this floating datum prestack depth migration method applied to piedmont complex structure imaging.