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利用地震剖面和属性识别天然气水合物得到了较为广泛的应用,但是BSR与断裂、气窗的关系,以及BSR下部游离气导致地震波高频衰减的地震属性却未得到更全面的认识。根据珠江口盆地东部沉积环境,结合高分辨率地震资料,分析了该地区BSR的反射现象,BSR与断裂、气窗的伴生关系。通过BSR下部游离气对地震波高频造成衰减的地震属性,直接检测了BSR下部游离气的存在。研究表明,该地区存在BSR和“双BSR”现象,其与断裂或者气窗存在共生关系。
The use of seismic profiles and attributes to identify gas hydrates has been widely used, but the relationship between BSR and faults and transom, as well as the seismic attributes of high-frequency attenuation of seismic waves caused by free radicals in the lower BSR are not fully understood. According to the sedimentary environment in the east of Pearl River Mouth Basin and the combination of high resolution seismic data, the BSR reflection phenomenon and the associated relationship between BSR and faults and transom are analyzed. The attenuation of the high frequency of seismic waves by the lower free gas of BSR caused the attenuation of seismic attributes, which directly detected the existence of free gas in the lower part of BSR. Studies have shown that there are BSR and “double BSR” phenomena in this area, which have symbiosis with faults or transisons.