Abstract：One of major difficulties in a process of deep geologic interpretation by using deep seismic reflection data is to identify coherent events of seismic reflection under high noise background,which can determine the model of underground reflection structures.Common-used method is to draw line plot,aimed at simplifying seismic reflection and emphasizing underground reflection structures.On the basis of summing up more than 20 years' development of deep reflected seismic technology,the paper presented and completed X² distribution technique of deep reflected seismic data.According to characters of deep reflected seismic technology and starting from the angle of reflected structure and energy,the method emphasized the deep structures.It is considered by interpretation that the sections with deep reflected structural line plot resuited from X² distribution processing can clearly reflect the recent structural framework,the secdons stacking structure and energy plot together are characterized by the distinction between strong and weak reflection:the weaker reflection represents the trail remained by older structural movement or by structural movement having a smaller amplitude;the stronger reflection represents the trail remained by newer structural movement or by structural movement having a larger amplitude.Speaking from the petrophysical angle,the deep reflection profile characterised by the distinction between strong and weak reflection represented different contact relation of lithology and their divided boundary,for example,the stronger reflection from extensional lower crust represents tough shear zone.The studied results show that Songliao lithosphere has character of typical continental rupture rift;a over 20 km thick Phanerozoic strata,uplift and crushed Moho and fault system resulted from tensile and intermittent press,which is considered that significant thickness of Mesozoic and Paleozoic layers existed in middle and upper crust and is accompanied with fracture system penetrating the crust,having better deep oil-gas migratory and accumulational prospectiveness.
陈志德, 杨文采, 李玲, 王丽艳 . 松辽盆地北部深反射地震X2分布处理及其深部地质特征[J]. 石油地球物理勘探, 2003, 38(6): 654-660.
Chen Zhide. X² distribution processing of deep seismic reflection in north of Songliao basin and its deep geological feature. OGP, 2003, 38(6): 654-660.
