利用相对波阻抗识别煤层缺失变薄带

THE APPLICATION OF RELATIVE WAVE IMPEDANCE TO THE RECOGNITION OF COAL SEAM MISSING AND THINNING ZONE

地震道积分是利用地震资料进行的无约束反演技术,也就是通过对地震道积分得到地层的相对速度剖面而进行地层分析的技术。通过地震道积分识别煤层缺失变薄带研究表明,小规模的煤层缺失变薄带在三维地震时间剖面上基本无显示,在地震道积分时间剖面上能够有效地识别出相对波阻抗的异常,进而解释煤层缺失变薄带,解释成果与巷道揭露一致,结果表明地震道积分是地震解释中一项的有效实用技术。

The seismic channel integration is a nonrestrictive inverse technique using seismic data, i.e. , a technique for stratigraphic analysis based on the relative velocity of the strata obtained by seismic channel integration. The application of seismic channel integra- tion to the recognition of the coal seam missing and thinning zone shows that the small-sized coal seam missing and thinning zone basically has no demonstration in the 3D seismic time profile, and that the anomaly of the relative wave impedance can be effectively recognized in the seismic channel integration time profile. Thus the coal seam missing and thinning zone can be interpreted. The interpretation result is consistent with the edit exposure, suggesting that the seismic channel integration is an effective and practical technique for seismic interpretation.