琼东南海域天然气水合物地震反射特征

The seismic reflection characteristics of gas hydrate in southeast Hainan sea area of the South China Sea

天然气水合物是一种新能源,目前,世界上许多国家都在进行天然气水合物研究。琼东南盆地是天然气水合物可能赋存的重点目标区,笔者针对琼东南海域二维地震资料进行以突出含天然气水合物地层地震反射特征为目的的处理,进一步识别含天然气水合物地层地震反射特征与分布。通过应用地震资料保幅处理技术,对该海域含天然气水合物地层地震反射特征,如似海底反射(BSR)、BSR强反射界面之上的高速异常带、BSR附近的振幅空白带、BSR的极性反转等,有了更多的认识,对开展全区含BSR特征研究有借鉴意义。

Gas hydrate is a new energy, and many countries in the world are doing research on gas hydrate. Southeast Hainan is the most important objective place on the northern slope of the South China Sea. Therefore, the research on two-dimensional seismic data in Southeast Hainan for seismic reflection characteristics of gas hydrate formation is helpful for further clarifying the relationship between distribution of gas hydrate and seismic reflection characteristics. The authors have obtained more knowledge on seismic reflection characteristics of gas hydrates in Southeast Hainan, such as bottom simulating reflector （BSR）, BSR strong reflectors above the speed anomaly, BSR near amplitude blanking, BSR polarity reversal. The results achieved by the authors are of important significance for the study of BSR-containing characteristics of the whole study area.