海洋天然气水合物属性提取

Seismic attribute extraction of marine gas hydrate

利用地震属性提取分析技术对似海底反射层和水合物稳定带特征关系进行研究。分别处理含天然气水合物理论模型和实际数据,利用纵横波速及井数据资料等多参数信息进行叠前同时反演和多属性提取。对比地震数据多属性参数的灵敏度特征,结果表明含水合物层通常会显示出较高的纵横波阻抗、密度以及拉梅常数λρ值,拉梅常数μρ对于水合物稳定带的指示作用较λρ明显。

The characteristic relationship between bottom simulating reflections( BSR) and gas hydrate stability zone were studied using seismic attribute extraction technology. The theoretical model and the actual data of gas hydrate are processed respectively. Prestack simultaneous inversion and multi-attribute extraction have been conducted,using multi-parameter information such as P wave and S wave velocity and well data. The sensitivity comparison among multiple property parameters of seismic data indicate that gas hydrate usually shows a higher impedance,density,and lame constant λρ. The lame constant μρ is more sensitive than λρ in identifying the hydrate stability zone.