准噶尔盆地内大部分地区为沙漠所覆盖。在沙漠区进行地震勘探工作,必须事先详细了解和掌握地震地质条件特征。本区沙漠按地貌特征分为短沙垄区、大沙垄区及大沙山三个区。各区的低速带类型和干扰波特征也是多种多样的。从总体来说,干扰波由炮点出发构成一个三角形干扰带。在干扰带内及其近炮点的一侧和远离炮点的一侧,干扰波具有不同的特征。压制这些干扰波仅通过频率滤波的方法是不够的,还必须在野外采用最佳的联合组合法,在室内采用视波长滤波及模拟组合。此外,尚须采用最佳观测系统及高覆盖次数,才能得到一些效果。

The most part of Zhungeer basin is covered by desert, It is neces-sary for us to know the seismic and geologic conditions before starting a seismic prospecting in the desert, The landform of the Zhungeer desert is divided into short bank, large size bank and huge sand dune,where the weatherings and noises vary characteristically。On the whole, the main noises occur in a triangular noise band which orignates at the shot-point on a record, The noises in the bank and its both sides have their respective characteristics, Frequency filtering alone is not ade-quate to suppressing these noises。Visible effect can be obtained by both using the optimum multiple geophones and shotholes, the optimum layout geometry and high multiple coverage in the field and adopting apparent wavelength filtering, analogue array and frequency filtering in processing.