川东北飞仙关组鲕滩气藏地震响应特征及勘探展望
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摘要
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。
The seismic response characteristics of the oolitic beach gas reservoirs in Feixianguan Formation of Lower Triassic were summarized in accordance with the seismic data beside the existent wells in Northeast Sichuan and a recognition model of gas reservoir distribution was set up in combination with model forward analysis.On the basis of such a model,the recognition and prediction of the distribution of the oolitic beach reservoirs in Feixianguan Formation within this region were finished through raising signal-to-noise ratio and velocity inversion treatment by use of the existent seismic data.Up to now,25 tracts have been predicted,enclosing with a total area of 630 km 2 where the natural gas resource extent estimated is more than 5 000 ×10 8m 3,which shows that the exploration prospects of the oolitic beach gas reservoirs in Feixianguan Formation are wide.
The seismic response characteristics of the oolitic beach gas reservoirs in Feixianguan Formation of Lower Triassic were summarized in accordance with the seismic data beside the existent wells in Northeast Sichuan and a recognition model of gas reservoir distribution was set up in combination with model forward analysis.On the basis of such a model,the recognition and prediction of the distribution of the oolitic beach reservoirs in Feixianguan Formation within this region were finished through raising signal-to-noise ratio and velocity inversion treatment by use of the existent seismic data.Up to now,25 tracts have been predicted,enclosing with a total area of 630 km 2 where the natural gas resource extent estimated is more than 5 000 ×10 8m 3,which shows that the exploration prospects of the oolitic beach gas reservoirs in Feixianguan Formation are wide.
引文
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