摘要
以实际水合物存在的美国布莱克海台地震数据为例,利用地震剖面中4个层位(海底层、水合物顶层、水合物层和游离气层)地震数据进行了地震属性的提取及属性分析,研究了各层位的属性特征。结果表明:均方根振幅、平均绝对振幅、平均能量变化、振幅峰态、绝对振幅积分、总能量、功率谱最大值、有限带宽能量等8种属性值在各层位的分布情况基本相同,即海底最高,其余依次是水合物层、游离气层和水合物顶层,可区分出水合物层和游离气层。由此,通过对比各层位的振幅属性值,可以指示天然气水合物的存在,为水合物识别及其开采提供参考依据。
This paper took the seismic data of the actual hydrate existence in American Blake Ridge as an example.By using seismic data in the four layers,namely the sea bottom layer,the top layer of hydrate,the hydrate layer and the free gas layer in seismic section,the seismic attribute extraction was analyzed,and attribute characteristics of every layer was studied.The results showed that eight attributes characteristics in four layers,namely root of mean square amplitude,mean absolute amplitude,mean energy amplitude,variation kurtosis,absolute amplitude integration,total energy,maximum of the power spectrum and the energy in limited band,were similar,and that the attributes in the sea bottom layer were the highest,and decreased in due order in the hydrate layer,the free gas layer and the top layer of hydrate.The hydrate layer and the free gas layer could obviously be distinguished.Therefore,the existence of gas hydrate was indicated by comparing the amplitude attribute values of every layer,and it offered a valuable reference for the hydrate recognition and exploitation.
出处
《广东海洋大学学报》
CAS
2011年第3期63-69,共7页
Journal of Guangdong Ocean University
基金
国家重点基础研究发展973计划课题(2009CB219505)
广东海洋大学人才引进专项基金资助(0812182)
