依据二维叠偏剖面编制构造图的空校原理-石油物探.pdf

42 1 V ol. 42, No. 1 2003 3 GE OPHYSI CAL PROSPE CT ING FOR P ET RO LEU M M ar. , 2003 : 200 3 010 10704 臧明福, 邹洪学, 付连义 ( 辽河油田勘探开发研究院计算所, 辽宁盘锦 124010 : , , , , , , , , , , , , , , , , : ; ; ; ; : P6314 : A Principle of spati al correction for structure mapping on 2D migration secti on Zang M ingfu, Zou Hongxue, Fu L ianyi ( Computation Institute, Research Institute of Ex plo ration and Development , Liaohe Oilf ield , Panjin 1240 10 , China Abstract: T his paper pro ved that the 2D component of a 3D migration offset at a reflection point is equal to the amount of 2D off set , in case of cont inuous medium and monoclinal str ucture. T her e are deviations in direction of no n inclination in time domain , such as bigger 2D migration offset , gentler inclination , shallow er depth , etc. T herefore, contradiction exists betw een results from time domain and space domain. A nalysis show s that existing methods are applicable only in inclination direction. A new alg orithm w as developed according to pr inciple of spatial corr ection in tw o pass, prov ided that 2D mig ration off set is zero. T ests w ith r eal data show that the metho d y ields no deviation . T hus it conf irm s that the 2D component of a 3D migration offset at a reflection point is equal to the amount o f 2D off set . T he result can be used as evidence of correct mapping . Key words:2D migration ; continuous medium ; monoclinal str ucture model; deviation ; pr inciple of spatial cor rec