摘要
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。
Even though seismic section and attributes have been widely used to identify gas hydrate, the relationship between BSR and fault and gas chimney, and the free gas under gas hydrate causing the attenuation of seismic signal are still not clear. According to the sedimentary environment of the eastern Pearl River Mouth Basin, combined with high-resolution seismic data, the reflection phenomenon of BSR was analyzed as well as the relationships between BSR and fracture, gas chimney. According to high-frequency attenuation caused by free gas under BSR, the gas reservoir was detected directly. The study shown that the presence of BSR and ＂double BSR＂ phenomenon in this region has symbiotic relationship with fault or gas chimney.
出处
《辽宁化工》
CAS
2016年第11期1391-1393,共3页
Liaoning Chemical Industry
关键词
珠江口盆地
BSR
断裂
气窗
高频衰减
Pear River Mouth Basin
BSR
fault
gas chimney
high frequency attenuation
