For a long period, the seismic exploration has been aiming at prolific zone of Daanzhai reservoir in mid Sichuan prospect.

在川中，地震勘探长期为寻找大安寨层油气高产区而努力，在四万平方公里范围内，已做地震剖面三万三千公里。

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The key technology for prediction of prolific zone in the shallow gas reservoirs is bright spot identification of seismic response with "low frequency but strong amplitude";

针对浅层气藏天然气富集带预测的关键技术是“低频强振幅”地震响应亮点识别技术；

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