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20世纪90年代在准噶尔盆地开展了以大面元区带三维为主的一次三维地震勘探,旨在寻找大中型构造油气藏,成效显著。进入新世纪以来,随着勘探目标向岩性-地层型油气藏转换,一次三维精度不足的缺陷逐渐显现,为此,在地质评价非常高的一次三维覆盖区开展了二次三维地震勘探。二次三维地震勘探突出应用了5项技术措施,即宽方位角观测与束间耦合,常规面元或小面元采集,地表相对潮湿季节施工,根据表层条件优选激发参数和应用中高频检波器接受与炮检联合组合。在厚沙漠区,二次三维资料主频比一次三维高15～20Hz,达到45～50Hz,其信嗓比、保真度也有很大提高。对小断裂、不整合面、尖灭点和砂体的地震反射成像清晰度明显提高,岩性圈闭识别能力增强。
In the 1990s, a three-dimensional seismic survey mainly focused on the large meconium zone was carried out in the Junggar Basin, aiming at finding large and medium-sized structural reservoirs with remarkable results. Since the beginning of the new century, with the conversion of exploration targets to lithologic-stratigraphic reservoirs, a defect with a three-dimensional accuracy shortage gradually appears. Therefore, a secondary three-dimensional seismic exploration is conducted in a three-dimensional coverage area with very high geological evaluation. The second three-dimensional seismic exploration highlights the application of five technical measures, namely, wide azimuth observation and beam coupling, conventional binaries or facets acquisition, surface wet season construction, according to the surface conditions to optimize the excitation parameters and the application of high-frequency detector Accepted and artillery joint joint portfolio. In the thick desert area, the secondary three-dimensional data frequency than the three-dimensional high 15 ~ 20Hz, reaching 45 ~ 50Hz, its letter throat ratio, fidelity has greatly improved. Seismic reflection imaging resolution of small faults, unconformities, pinch-out points and sand bodies is obviously improved, and lithologic trapping recognition ability is enhanced.