天然气水合物准三维地震调查面元参数优化研究

在我国某海域对天然气水合物研究过程中,使用了单源单缆准三维地震勘探方法,获得了天然气水合物矿体较好的三维成像效果.影响天然气水合物矿体三维成像的因素很多,其中,面元参数的选取是最直接的影响因素之一.本文分析了大量试验数据,结果表明,在确定了电缆的排列长度为2400m(192道)的前提下,面元横向最佳优化尺寸应为50m,处理面元为原始采集面元大小的1/2(即面元大小为12.5mx25m)时,可以兼顾地层的真实性和连续性.以此为基础可获得较高质量的准三维地震处理资料.

Optimized bin parameter on gas-hydrate quasi-three-dimensional seismic survey

In a sea area of China,the single source-single streamer quasi-three dimensional seismic survey method was ap-plied in the gas-hydrate investigation,and a satisfying three-dimensional(3D) image was obtained.The bin parameter is one of the important parameters that can influence the 3D imaging.According to the result of data,if a streamer length of 2400m(192 channels) is fixed,the best optimization bin size(transverse) should be 50m and processing bin should be half of the origi-nal acquisition size,i.e.,12....