【摘要】 为提高致密低渗气田薄储层预测精度,对不同年度采集的二维地震数据从道集和提高分辨率角度进行特殊处理,选取鄂尔多斯盆地苏里格气田苏147井区主力产气层盒8段河流相储层做弹性参数敏感性分析,优选出横波阻抗、纵横波速度比、泊松比这3类储层预测敏感因子,确定横波阻抗门槛值在7 000~8 500 g·cm-3·m·s-1之间为砂岩,纵横波速度比小于1.6或泊松比小于0.18为含气砂岩.由此开展二维地震反演和储层含气性预测,指明研究区盒8段砂岩和含气砂岩储层的平面分布特征,为气田平稳开发提供合理依据.更多还原

【Abstract】 In order to improve the precision of low tight sand reservoir,some special processing methodswere selected to improve resolution in 24 2-D seismic lines acquiring in different years,and elastic parametersensitivity analysis was carried out on He8 major gas-producing layer of fluvial reservoir in Su147 block.Research results shows that key sensitivity parameters for reservoir predicting are S-wave impedance,P-waveto S-wave velocity ratio and Poisson ratio. The thresholds of the three parameters are as follows: sand reservoir’S-wave impedance is 7 000 8 500 g·m/s·cm3,gas-bearing reservoir’s P-wave to S-wave velocity ratio lessthan 1.6 and Poisson ratio less than 0.18. From the above,2-D seismic inversion,gas-bearing predictions anddistribution feature describe are carried out in the research,and all of them will provide scientific foundation tothe gas field.更多还原