【摘要】 理论研究和实验表明,多孔隙介质中流体的存在及其运动是弹性波频散和衰减的主要原因。地震波在地下岩层多孔介质的传播过程中,由于所含流体性质不同,特别是当岩石中含有石油和天然气时,地震波的吸收衰减量显著增大。地震波的吸收衰减信息和振幅信息密切相关,与其他地震信息相比具有更高的灵敏度。本文以Biot理论和实验室试验数据为依据,在多相介质条件下,阐述了储层中不同流体对地震波振幅的吸收衰减作用的差异,并利用地震波的振幅吸收衰减信息对灰岩潜山缝洞型储集层进行了油气检测研究,取得了良好的应用效果。更多还原

【Abstract】 It is showed by theoretical study and tests that existing fluid in porous medium and its movements are main reasons of dispersion and attenuation of elastic waves.In a process of propagation of seismic waves in porous medium of underground bed,the attenuation by absorption of seismic waves greatly increases since different property of contained fluids,especially when the hydrocarbon is contained in the rocks. The attenuation by absorption of seismic waves is closely relative to amplitude information and has higher sensibility if in comparison with other seismic information. On the basis of Biot theory and test data in lab,the paper expounded that the different fluids in reservoir has different attenuation action on the amplitudes in a condition of multi-phase medium and by using the attenuation information of amplitudes of seismic waves to study hydrocarbon detection of carbonate buried-hill fracture-cavernous reservoir, achieve good application effects.更多还原