Q-Marine技术和特色处理技术在东海海域油气区的应用
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摘要
2011年,中海油上海分公司在东海海域油气区应用Q-Marine(高品质海上地震资料采集)技术进行三维地震采集。Q-Marine技术具有标定的数字检波器,高密度采集、标定的震源,精确的定位系统以及可操控的电缆四大特点,可提供更利于噪声压制、定位精度更高和频带更宽的原始资料。在室内数据处理过程中,使用DWD(确定性水层多次波压制)、GSMP(广义地表多次波预测和压制)、COMFI(压缩傅里叶插值规则化)、SRAC(空间相对振幅补偿)等特色处理技术去除多次波,进行空道插值和消除采集脚印影响,最终获得更高信噪比、更保真和保幅、更有利于后续AVO(振幅随偏移距的变化)分析等特殊处理的成果和道集资料。
In 2011,Shanghai Branch Company,CNOOC carried out a 3-D seismic survey in Donghai Oil and Gas Area with Q-Marine seismic exploration technology.The exploration technology characterized mainly by 4 features,including calibrated digital sensor,high-density acquisition and calibrated source,accurate positioning system and steerable streamers.It could provide original data which were more advantageous for denoising,highly and accurately positioning and of wider frequency bandwidth.During indoor processing,the featured processing modules DWD(deterministic water layer de-multiple),GSMP(general surface multiple prediction),COMFI(compact Fourier interpolation with bandwidth optimization) and SRAC(spatial relative amplitude compensation)are used for demultipling,blank traces interpolating and attenuating acquisition footprint effectively.Finally the data of higher S/N ratio,more fidelity-preserving,amplitude-preserving and more beneficial to subsequent AVO analysis are obtained.
In 2011,Shanghai Branch Company,CNOOC carried out a 3-D seismic survey in Donghai Oil and Gas Area with Q-Marine seismic exploration technology.The exploration technology characterized mainly by 4 features,including calibrated digital sensor,high-density acquisition and calibrated source,accurate positioning system and steerable streamers.It could provide original data which were more advantageous for denoising,highly and accurately positioning and of wider frequency bandwidth.During indoor processing,the featured processing modules DWD(deterministic water layer de-multiple),GSMP(general surface multiple prediction),COMFI(compact Fourier interpolation with bandwidth optimization) and SRAC(spatial relative amplitude compensation)are used for demultipling,blank traces interpolating and attenuating acquisition footprint effectively.Finally the data of higher S/N ratio,more fidelity-preserving,amplitude-preserving and more beneficial to subsequent AVO analysis are obtained.
引文
[1]黄志超,叶加仁.东海海域油气资源与选区评价[J].地质科技情报,2010,29(5):51～55.
[2]姚云霞,刘江,张雷.叠前纵横波联合反演技术在PH油气田薄储层预测中的应用[J].中国海上油气,2011,23(6):377～380.
[3]陈华,张亚斌,徐翔之,等.中深层地震采集方法研究[J].石油天然气学报(江汉石油学院学报),2010,32(10):219～223.
[2]姚云霞,刘江,张雷.叠前纵横波联合反演技术在PH油气田薄储层预测中的应用[J].中国海上油气,2011,23(6):377～380.
[3]陈华,张亚斌,徐翔之,等.中深层地震采集方法研究[J].石油天然气学报(江汉石油学院学报),2010,32(10):219～223.
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