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我队于1974年下半年开始,在四川DJB地区先后进行了干扰波调查、表层速度研究和多次覆盖试验。DJB构造属MYX背斜带,在地面是一狭长的高角度背斜构造,地层倾角约五、六十度,山区地形,比高约600米。工区地形恶劣,出露岩性多变,表层极不均匀,激发接收因素差异甚大。加之人烟稠密,地物颇多;同时地下构造复杂,地层倾角很大,各种干涉(表层干扰)与有效波混杂在一起,真伪难辨。此种情况在四川盆地的地震勘探中具有较普遍的代表性。
My team started in the second half of 1974, and conducted interference wave surveys, surface velocity studies and multiple coverage tests in the DJB area in Sichuan. DJB structure is a MYX anticline, the ground is a narrow high-angle anticline structure, the formation dip about five or sixty degrees, mountainous terrain, about 600 meters higher than. The harsh terrain of the work area exposed rocky changes, the surface is very uneven, and the factors that stimulate the reception are quite different. Combined with densely populated, a lot of objects; the same time, underground structure is complex, a large dip angle, a variety of interference (surface interference) and the effective wave mixed together, the authenticity of the illegible. This kind of situation has the more general representation in the seismic exploration in the Sichuan Basin.