伊犁盆地地震勘探技术瓶颈与攻关效果分析

Technical bottleneck and research effect analysis of seismic exploration of Yili basin

伊犁盆地近地表及深层地震地质条件复杂,地震勘探难度大,现有地震资料难以满足勘探需要。为此,针对制约和影响反射品质的两大地质瓶颈开展系统研究与地震技术攻关:采用基于多次波压制效果的观测系统优化、巨厚砾石层下深井大药量激发、组合压制多次波、剩余能量补偿等技术,较好地压制了多次波,提高了强煤系地层下的有效反射能量,剖面品质得到显著提高。

The seismic-geological conditions of near surface and deep formation of Yili basin are complex, the seismic exploration is difficult and the existing seismic data is unable to meet the exploration needs. Therefore, in view of the restriction and influence reflection quality, the two geological bottlenecks, the systematic research of seismic technology has been carried out. Based on the multiple wave suppression effect observation system optimization, the giant thick gravel layer down deep well big dosage excitation, combined multiple suppression and residual energy compensation technologies have been applied, which can better suppress multiples, improve the strong coal measure strata of the effective reflection energy, and obviously increase profile quality.