永城矿区复杂条件下的三维地震勘探技术

针对永城矿区存在地表障碍物稠密、新生界地层厚度大、煤层不同程度地受到岩浆侵蚀等不利于地震勘探的特点,采用小线距、小偏移距技术解决了大规模障碍区信息不全的问题;采用宽方位角观测系统、宽频带接收、叠前三维地表一致性振幅补偿、三维地表一致性反褶积等手段最大限度地提高了地震资料的分辨率,提高了成像精度;解释过程中采用波阻抗反演与地震综合属性分析技术确定了岩浆岩侵入煤层的范围,利用相干体分析技术搞清了断层特别是小断层的发育情况,取得了良好的地质效果与经济效益。

3D Seismic Survey Technology Under Complex Condition in Yongcheng Mining Area

In view of the surface obstacles densely, the depth of Cenozoic group stratum is large, the characteristic of coal bed received the rock magma corrosion are not favourable to the seismic survey in Yongcheng mining area, by small distance of between line and line and the small Displacement distance technology solved the problem of information entired in the large - scale bstacles area. By the width azimuth observation system, the wideband receiving, folds 3D surface uniform oscillation amplitude to compensate, the 3D surface uniformity deconvolution and so on, the methods enhanced the material resolution maximum limit, increased the imagery precision ; In the process of Explanation, with the wave impedance inversion and the seismic survey analysis technology of synthesizes attribute determines the magmatic rock invasion coal bed scope, by coherent body analysis technology has clarified the small faults, specially the growth situation of the small faults, which has obtained the good geological effect and the economic efficiency.