长排列大容量准三维地震勘查技术在湍流海区的应用

doi:10.11720/wtyht.2022.2372

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摘要

长排列大容量准三维地震勘查技术指的是通过单一组合震源放炮、单条长电缆接收的传统二维采集方式的高密度采集,在处理中按照三维处理流程,采用五维插值技术进行面元规则化处理,使覆盖次数和不同炮检距覆盖分布较均匀的三维地震数据体。这种技术主要用于海洋湍流异常发育的海域,能较好地提高中深层的地震成像效果,满足油气勘探的需要。本文主要介绍了该技术的采集和处理关键方法。

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	钟广见
	张莉
	邓桂林
	易海
	冯常茂
	孙鸣
	赵静
	赵忠泉

关键词 ：南海, 准三维地震, 湍流, 油气

Abstract：

The long-streamer and large-capacity quasi-3D seismic survey technology is used to obtain 3D seismic data that cover the study area equal times under different source-detector distances.To this end,it obtains high-density acquisition of seismic data using a single source array in shooting,a single long cable for data receiving,and traditional 2D acquisition.Meanwhile,it conducts bin regulation using the 5D interpolation method according to the 3D process flow.This technology can used to effectively improve the seismic imaging effects in medium-deep parts in turbulent sea areas,thus satisfying the need for oil and gas exploration.This study primarily introduces the key methods for the acquisition and processing of seismic data.

Key words： South China Sea quasi-3D seismics turbulence oil and gas

收稿日期: 2020-09-05 修回日期: 2021-12-23 出版日期: 2022-04-20

ZTFLH:

P631

基金资助:中国地质调查局地质调查项目“南海东北部中生界油气资源调查”(DD20190212)

作者简介: 钟广见(1965-),男,教授级高工,主要从事海洋油气资源调查研究工作。Email: 2645078906@qq.com

引用本文:

钟广见, 张莉, 邓桂林, 易海, 冯常茂, 孙鸣, 赵静, 赵忠泉. 长排列大容量准三维地震勘查技术在湍流海区的应用[J]. 物探与化探, 2022, 46(2): 402-409.
ZHONG Guang-Jian, ZHANG Li, DENG Gui-Lin, YI Hai, FENG Chang-Mao, SUN Ming, ZHAO Jing, ZHAO Zhong-Quan. Application of long-streamer and large-capacity quasi-3D seismic survey technology in turbulent sea areas. Geophysical and Geochemical Exploration, 2022, 46(2): 402-409.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2022.2372 或 https://www.wutanyuhuatan.com/CN/Y2022/V46/I2/402

Fig.1 南海北部洋流分布

Fig.2 6 400立方英寸枪阵结构

Fig.3 震源与电缆相对位置

Table 1 地震采集参数

Fig.4 原始面元覆盖率

Fig.5 扩展后面元覆盖率

Fig.6 准三维地震资料处理流程

Fig.7 去鬼波原理

Fig.8 去鬼波前后频谱分析

Fig.9 去鬼波前(a)后(b)道集对比

Fig.10 去鬼波前(a)后(b)叠加剖面对比

Fig.11 五维插值前(a)后(b)初始叠加剖面对比

Fig.12 原始资料覆盖次数

Fig.13 规则化后覆盖次数

Fig.14 2D(a)与准3D(b)地震剖面对比

Fig.15 海底扇体地震反射特征

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