Investigation of Surface Layer Texture Using Surface Wave Information

Abstract

Abstract: Surface wave is separately used to explore the macro and micro structures of the earth in earthquake and engineering seismology. Surface wave, one of disturbing waves in petroleum exploration, carries also the information of surface layers in the earth. The low-velocity layer that concerned by petroleum prospecting belongs to the forward layer structure increasing from the top down. The forward model computation shows that the surface wave mainly exists in the range of base model. With p-ωtransform, the dispersion curves of petroleum seismic records can be effectively picked up. By dividing the surface layer structure into isopach thin layer and adopting smooth restriction, the basic dispersion curves can be inversed into the shear velocity of low-velocity layer, thus developing the structural model of surface layer.

Key words: Seismology, surface wave, wave band, forward modeling, inversion

CLC Number:

P631.44

YAN Jun-hua, PENG Wen, ZHOU Xi-xiang. Investigation of Surface Layer Texture Using Surface Wave Information[J]. Xinjiang Petroleum Geology, 2007, 28(5): 635-639.

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