南海北部海域油气资源调查技术及其应用研究——低频地震震源技术研究  

Exploration of Oil and Gas Resources in the Northern Part of the South China Sea:Study on the Low-Frequency Seismic Source Technology

作　　者：曾宪军[1] 韦成龙[1] 翟继锋[1] 张如伟[1] 

机构地区：[1]国土资源部海底矿产资源重点实验室广州海洋地质调查局,广东广州510075

出　　处：《海洋技术学报》2017年第3期112-116,共5页Journal of Ocean Technology

基　　金：国家"729"专项资助(GZH201200508)

摘　　要：低频地震震源技术在野外地震调查中起着举足轻重的作用,特别是在南海北部海域油气勘探目标埋藏深的条件下,如何改善中生界地层成像效果至关重要。文中通过对"立体"结构低频震源技术的研究,结合海上试验的数据结果,综合分析了立体低频震源的频带宽度较常规震源相比有所拓宽,在抗噪和信噪比方面也有较大优势,这些关键参数的提高,有助于获得较强的中深部有效反射信号,增强信噪比,提高中生界地震采集的野外资料的总体质量和后期解释。因此,通过研究,可以选择设计最佳的组合方案,为南海北部海域油气资源调查提供技术支撑。Low-frequency seismic source technology plays an important role in field earthquake investigation,especially in oil and gas exploration in the northern sea area of the South China Sea where targets are deeply buried. It is essential to improve the imaging effect of Mesozoic stratigraphy. Based on the research on low-frequency source technology of ＂three-dimensional structure＂ and the data from sea tests, this paper comprehensively analyzes that the bandwidth of three-dimensional low-frequency source is widened compared with conventional source, and there is also a great advantage in anti-noise and signal-to-noise ratio. The improvement of these key parameters will help to obtain a strong middle and deep effective reflection signal,enhance the signal to noise ratio, improve the Mesozoic seismic acquisition of the overall quality of the field data and post-interpretation. Therefore, through research, it is able to choose the optimal combined scheme, so as to provide technical support for exploring oil and gas resources in the northern waters of the South China Sea.

关 键 词：低频震源 立体 信噪比 频宽 沉放深度 

分 类 号：P744.4[天文地球—海洋科学]