Processing techniques of low signal-to-noise ratio seismic data in Daqing prospect area,Tarim Basin, Xinjiang Region
Wang Zhaohu et al.(Research Institute.Geophysical Prospecting Company,Daqing Petroleum.Administration. Daqing 163357)
The Daqing prospect area of Tarim Basin, covered by deserts, is located near theBadong rift structure zone. It is one of the low S/N ratio areas in the basin. Due to the constraintsof surface and seismogeologic conditions, the raw data acquired in this area had a low quality, withstrong shallow refraction, multiple refraction, low frequency noise and various random noise onthe records. These make effective reflections scatter into short-range reflection events. The lowS/N ratio of raw data is a major obstacle to data processing. Based on the processing of largeamount of actual seismic data in this area, we carry out researches on techniques such as staticcorrection. noise removal, DMO, and migration, and sum up a set of processing techniquessuitable to low S/N ratio seismic data in desert areas.
【CateGory Index】： P631.4