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根据川东北地区已有的气井井旁地震资料 ,总结了下三叠统飞仙关组鲕滩气藏的地震响应特征 ,结合模型正演分析 ,建立了气藏分布的识别模式。据该模式 ,利用已有的地震资料 ,作提高讯噪比和速度反演处理后 ,对区内飞仙关组鲕滩储层分布进行了识别预测。到目前为止 ,已预测圈定鲕滩储层有利分布区块 2 5块 ,累计面积达 630km2 ,估算的天然气资源量达 50 0 0× 1 0 8m3以上。展示了飞仙关组鲕滩气藏广阔的勘探远景。
According to the seismic data near gas wells in Northeast Sichuan, the seismic responses of the gas reservoir in Feixianguan Formation of the Lower Triassic are summarized. Based on the model forward analysis, the identification model of gas reservoir distribution is established. According to this model, the existing seismic data is used to improve the SNR and velocity inversion processing, and the distribution of oolitic reservoirs in the Feixianguan Formation in the area is identified and predicted. So far, it has been predicted that there are 25 favorable distribution blocks of oolitic beach reservoirs, with a total area of 630km2. The estimated natural gas resources amount to more than 50 × 0 × 108m3. The Feixianguan Formation oolitic beach gas reservoir broad exploration prospect.