关键词: 准噶尔盆地, 沙漠, 静校正, 高速层, 模型

Abstract: The hinterland of Junggar basin is mostly covered with desert. It brings about difficulty for seismic prospecting due to its fluctua-tion, inhomogeneous distribution of surface dune sand. It can not only absorb the signals with medium and high frequency in propagation of reflection event, but also allows reflection event from the same layer in a seismic record to produce static correction time lag with different wavelength in the close recorded trace. And such a high frequency part of the time lag directly impacts the stacking and imaging effects of seismic reflection event, while low frequency part of it can severely distort the configuration of underground geological structures. To remove the impact of static correction interval transit time in desert, it is necessary to study the near-surface structure and its depth-velocity relation, followed by developing the corresponding depth—velocity model, based on which calculating the static correction values of shot point and ac-ceptance point.

Key words: Junggar basin, desert, static correction, high velocity layer, model