为落实川西坳陷洛带气田的天然气储量 ,利用地质、地球物理相结合的方法 ,对其上侏罗统蓬莱镇组储层进行了地球物理模型研究。研究表明 ,洛带气田含气砂体的孔隙度、渗透率和含气饱和度与速度呈线性关系 ,含气砂岩具有低速度、强振幅、低频率、低关联维、高道积分特征。据此 ,较准确地预测了储层的空间分布 In order to implement natural gas reserves in Luodai gas field in western Sichuan Depression, the geophysical modeling of the Penglaizhen Formation reservoir of Upper Jurassic was conducted by the combination of geology and geophysics. The results show that the porosity, permeability and gas saturation of gas-bearing sand bodies in Luodai gas field show a linear relationship with the velocities. The gas-bearing sandstones have the characteristics of low velocity, strong amplitude, low frequency, low correlation dimension and high pass. Accordingly, the spatial distribution of reservoir is more accurately predicted