【摘要】 致密砂岩储层中气、水的非均匀分布使地震弹性参数与储层参数间的关系变得复杂,导致定量解释多解性增强。针对致密砂岩储层复杂孔隙流体分布特点,改进了随机斑块饱和模型,改进后的模型可以更准确模拟岩石物性、孔隙流体等对地震波弹性参数的影响。基于改进型随机斑块饱和模型形成了多尺度岩石物理模板,经超声尺度、测井尺度和地震尺度地球物理数据标定后,应用于四川致密气层检测,预测的孔隙度、含气饱和度与试气结果较为一致。更多还原

【Abstract】 The heterogeneous distribution of gas and water in tight-sand gas reservoirs may cause complex relationships between elastic and reservoir parameters,which results in strong uncertainty in the quantitative seismic interpretation.According to characteristics of complex fluid distribution in tight-sand gas reservoirs,we modify the continuous random patchy-saturation model.This modified model can well investigate the influence of petrophysical properties and pore fluids on wave responses.A multi-scale rock physical template is established based on the modified model,and is calibrated by seismic-,logging-,and ultrasonic-scale data.The multi-scale rock physics template is applied to the tight-gas reservoir prediction in Sichuan Province.The quantitative estimation of rock porosity and gas saturation matches very well with well gas production tests.更多还原