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国内外用于煤层气地震勘探的方法主要有:运用地震、测井、地质等资料的地震反演技术;利用振幅随偏移距的变化预测岩石孔隙中流体性质变化的AVO技术;利用纵横波预测煤层中的裂隙发育部位,进而准确预测瓦斯富集部位的三维三分量地震勘探技术等。可以预计:综合利用三维地震、地球物理测井及钻探资料预测煤层气富集区,必将成为今后煤层气地震勘探技术的发展趋势。
The main methods of CBM seismic exploration at home and abroad are: seismic inversion using seismic data, well logging and geology data; AVO technology using the variation of amplitude with offset to predict the change of fluid properties in rock pores; Coal seam fracture development site, and then accurately predict the gas-rich parts of the three-dimensional three-component seismic exploration technology. It can be predicted that comprehensive utilization of 3D seismic, geophysical logging and drilling data to predict the CBM enrichment area will surely become the development trend of CBM seismic exploration technology in the future.