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对含不同流体砂岩速度特征通过定量研究:在港西浅层明化镇组由于砂体含不同流体速度差异大,导致地震反射特征各异。综合含气砂岩地震响应特征,可以明确含气砂岩表现为强波谷与强波峰对应的亮点反射的特征。含气储层AVO属性特征的确定可以指导利用地震道集的AVO反演结果进行可靠的含气砂岩分布预测。
Through the quantitative study on the velocity characteristics of sandstone with different fluids, the seismic reflection characteristics are different due to the large difference in velocities between different fluids in the Minghuazhen Formation in the west of Hong Kong. Based on the seismic response characteristics of gas-bearing sandstones, it can be clearly demonstrated that the gas-bearing sandstones are characterized by bright reflection corresponding to strong troughs and strong peaks. The determination of AVO attributes of gas-bearing reservoirs can guide the prediction of gas-bearing sandstone distribution by using AVO inversion results of seismic traces.