The Ordos Basin boasts abundant deep oil and gas resources.Hence,establishing the tectonic framework of the entire basin based on high-precision seismic imaging processing and structural interpretation holds critical significance.This study investigated the amplitude consistency problem in processing the large-scale 2D spliced profile of the basin.It employed a six-step amplitude consistency processing flow for amplitude preservation,involving energy adjustment between shots,spherical diffusion compensation,surface-consist-ent amplitude compensation,frequency-division amplitude compensation,and amplitude normalization based on the fold number/offset distribution.The processing flow effectively eliminated the amplitude inconsistency caused by the differences of survey lines in surface excitation and receiving conditions,acquisition methods,observation systems,and instruments in different years.The obtained basin-scale 2D spliced profile provided a reliable data basis for establishing the tectonic framework of the basin,clarifying the tectonic patterns,fault characteristics,and stratigraphic distributions of the fourth and third members of the Ordovician Majiagou Formation and the underlying strata,and predicting the distribution of paleo-uplifts.Moreover,the technique used in this study serves as a reference for processing seismic data of other complex areas.
关键词
炮间能量/吸收衰减/分频振幅补偿/覆盖次数/偏移距/振幅归一化处理
Key words
energy between shots/absorption-induced attenuation/frequency-division amplitude compensation/fold number/offset/am-plitude normalization processing
维普
万方数据