三叠系飞仙关组鲕粒滩储层是四川盆地重要的油气储层之一.九龙山地区飞仙关组储层埋深在5000 m左右,具有多期生物碎屑滩沉积的地质背景,但储层厚度薄,现有地震资料分辨率相对较低,难以准确预测鮞粒滩储层的空间展布,制约了该区飞仙关组的天然气勘探.通过采用拓频处理系列技术,获得高分辨率的三维地震资料,在此基础上采用伽马反演和波阻抗分频反演等技术,有效预测并刻画了九龙山地区飞仙关组鲕粒滩薄储层的空间分布.储层预测结果与实钻吻合较好,证实了所采用的技术方法在鲕粒滩薄储层预测中是实用和有效的.

Oolitic shoal reservoirs of the Triassic Feixianguan Formation is one of the important oil and gas reservoirs in Sichuan Basin. The reservoir of Feixianguan Formation in Jiulongshan area is about 5 000 m deep, which has the geological background of multi-stage bioclastic shoal deposition. However, the thickness of the reservoir is thin, and the resolution of existing seismic data is relatively low, so it is difficult to accurately predict the spatial distribution of oolitic shoal reservoir, which restricts the gas exploration of Feixianguan Formation in this area. In this paper, the high-resolution three-dimensional seismic data are obtained by using the frequency expansion processing technology. On this basis, the spatial distribution of thin oolitic shoal reservoir of Feixianguan Formation in Jiulongshan area is effectively predicted and depicted by using the technologies of gamma inversion and frequency decomposition impedance inversion. The reservoir prediction results are in good agreement with the actual drilling, which proves that the technologies are practical and effective in the prediction of thin oolitic shoal reservoir.