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柴达木盆地东部第四系蕴藏着丰富的天然气资源 ,由于表层地震地质条件的复杂性和含气异常的特殊性 ,致使含气异常或浅层地质条件的变化都可能造成“低频、低速、低信噪比、同相轴下拉”的地震异常现象 ,使得对气区的地震勘探和认识较为困难。在理论分析的基础上 ,柴达木盆地东部高分辨率地震技术采用小道距、小组合距、小井深、小炮检距、高采样间隔、高覆盖次数、多井组合激发、多检波器组合接收、突出气区低频信息、突出目的层勘探的采集技术 ,依据工区的特点 ,资料处理重点突出含气异常区的去噪、反褶积、分频叠加技术等 ,总结了一套适合盆地气区勘探的高分辨率技术方法
Due to the complexity of the surface seismic geological conditions and the particularity of gas anomalies, the Quaternary in the eastern Qaidam Basin contains abundant natural gas resources. As a result, changes in gas-bearing anomalies or shallow geological conditions may cause “low-frequency, low- Low signal to noise ratio, pull-down ”event of anomalies, making the gas exploration and understanding of the more difficult. On the basis of theoretical analysis, the high resolution seismic technology in the east of the Qaidam basin adopts the combination of multi-detector, multi-detector combination, such as small track distance, small grouping distance, small well depth, small offset, high sampling interval, According to the characteristics of the work area, the data processing focuses on the denoising, deconvolution and frequency-division superposition of the anomalous gas-bearing anomalies, and so on, and sums up a set of techniques suitable for the basin gas Area exploration of high-resolution technical methods