上下源宽线地震采集技术在南黄海中部隆起的应用  

Wide line seismic acquisition with over/under sources in the central uplift of South Yellow Sea Basin

作　　者：熊忠 高顺莉 张敏强 徐发 周峰 侯凯文 

机构地区：[1]中海石油(中国)有限公司上海分公司,上海200335

出　　处：《石油地球物理勘探》2016年第4期647-653,1,共7页Oil Geophysical Prospecting

基　　金：国家科技重大专项课题(2011ZX05023-003)资助

摘　　要：南黄海中部隆起区发育巨厚的中、古生代海相地层,油气勘探前景良好。针对中部隆起浅部存在强屏蔽层、多次波干扰严重、中古生代地质构造复杂等不利地震地质条件,引进上下源宽线地震采集新技术,采用低频大容量气枪震源、上下源组合激发方式增强地震波场穿透能力,拓宽地震数据频带,并配合双缆宽线地震观测系统,提高地震资料覆盖次数,压制各种干扰信息。实践表明,该技术有效地提高了南黄海中、古生代地层地震数据的信噪比,反射成像品质得到显著改善。It is believed that Mesozoic-Paleozoic marine sedimentary strata in the central uplift region of the South Yellow Sea Basin is extremely thick,and it bears enormous hydrocarbon potential.There are some disadvantageous factors about seismic geology conditions,such as strong shielding layers in shallow part,intense multiples,and intricate geological structures.We adopt a new seismic acquisition approach integrating wide line acquisition with over/under sources.To enhance the penetrability of artificial seismic wave field and broaden seismic frequency band,huge volume over/under sources with low frequency are applied. Dual-streamer wide line seismic geometry is used to increase folds and suppress various noise.Our seismic data acquisited with the proposed approach shows that both data S/N and seismic imaging are obviously improved,which contains much more imformation of Mesozoic-Paleozoic strata in South Yellow Sea.

关 键 词：南黄海 中部隆起 中、古生代 上下源 宽线采集 信噪比 

分 类 号：P631[天文地球—地质矿产勘探]