地震波形分类技术是地震相分析技术的重要延伸。通过对时窗选取、地震属性体选择、波形分类数、模型道选取等主要技术参数的分析，认为时窗选取和地震属性体是影响波形分类结果最大的两个因素。以河东北部煤田为例，利用地震波形分类技术对其13#煤层的分叉现象进行了分析，在此基础上，对13#煤反射波上下各20 ms的层段，进行了三次计算，经对比认为当波形分类数为6时的地震相可很好的区分煤层分叉的不同状态。对比振幅、频率及相位等常规属性与分类结果的地震相，发现常规属性平面虽也能反映出煤层分叉趋势，但属性平面图对分叉线表达欠清晰，而三种属性的波形分类平面图可清晰的反映出煤层从西南至东北方向的分叉边界。%The seismic waveform classification technology is a major development of seismic facies analysis technology. Through analy⁃ses of major technical parameters including time window designation, seismic attribute cube selection, number of waveform classified results, model trace extraction, considered that the former two are the major factors impacting waveform classified results. Taking the Hedong north coalfield as example, through seismic waveform classification technology, analyzed the bifurcation phenomenon of the coal No.13. To an interval above and below 20ms each of reflection wave, after 3 computations, when classified waveform number is 6, seismic facies can discriminate different states of coal bifurcation well. Comparison of conventional attributes of amplitude, frequency and phase with classified result seismic facies have found that although conventional attributes plan can reflect coal bifurcation trend, but expression of attribute plan is not clear, while the waveform classification plan of three attributes can reflect coal bifurcation bound⁃ary from SW to NE clearly.
展开▼
