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本文提出的储层毛细管应变地震波这衰减机理,是指地震波在多孔汉相介质传播过程中,使固结很差的储层毛细管(孔隙喉道)优先闭合性应变,其应变量主要控制被压缩气体的体积和波动能量耗散及波这衰减量。据此,建立纵波速度与毛细管压力、孔隙结构、含水饱和度和岩石闭会弹性模量间的数学关系;较好地解释了Domenico效应;初步定量性评价孔隙结构和含气饱和度对地震波速的影响,这对拓宽毛细管压力资料在地震资料解释中的应用范围具有较大的理论和实际意义。
The attenuation mechanism of reservoir capillary strain seismic wave proposed in this paper refers to the preferential closed strain of reservoir capillary (pore throat) with poor consolidation, which is mainly controlled by the compressive strain Gas volume and volatility energy dissipation and wave attenuation. Based on this, the mathematical relationship between P-wave velocity and capillary pressure, pore structure, water saturation and rock-closure elastic modulus was established. The Domenico effect was well explained. The initial quantitative assessment of the effect of pore structure and gas saturation on seismic velocity It is of great theoretical and practical significance to broaden the application range of capillary pressure data in seismic data interpretation.