振幅保真的单程波方程偏移理论_张宇.pdf

49 5 Vol. 49, No. 5 2006 9 CHINESE JOURNAL OF GEOPHYSICS Sep. , 2006 . . , 2006, 49( 5) : 1410~ 1430 Zhang Y. The theory of true amplitu e one-way wave equation migration. ChineseJ . Geophys. ( in Chinese) , 2006, 49( 5) : 1410~ 1430 张 宇 VeritasDGC Inc. , 10300 Town Park Drive, Houston, TX 77072, USA , . , . , , Dubrulle , . , . , , Kirchhoff . . , * p p . p Pp , U D U D . , , , , , 0001- 5733(2006) 05- 1410- 21 P631 2005- 12- 30,2006- 05- 05 The theory of true amplitude one-way wave equation migration ZHANG Yu VeritasDGCInc. , 10300 Town Park Drive, Houston, TX 77072, USA Abstract In this technical report, we review the recent evelopment of true amplitu e one-way wave equation migration an summarize the migrate amplitu e performance from ifferent one-way wave equations. To pro uce correct amplitu e from postack phase-shift migration, we have to apply accurate geometrical sprea ing compensation in preprocessing. Although Dubrulle. s common-offset phase-shift migration gives correct imaging position, it is not a true amplitu e migration except for zero offset or flat reflectors. We have shown that the conventional common-shot one-way wave equation migration oes not pro uce correct migration amplitu e. Base on the true amplitu e one-way wave equations an the surface boun ary con ition corrections, we evelope true amplitu e common-shot migration an have prove that it pro uces an inver