摘要
底辟带具有巨大的油气勘探潜力,但受浅层气云的影响,该领域地震资料成像品质差、构造形态不准确,对周缘含油构造潜在目标的落实带来了困难。为解决底辟模糊区成像问题,本文分析近年海上新采集资料的优势及新老资料的共性特征,提出弱信号保护的保幅处理、高精度速度建模及Q深度偏移等关键技术,形成对不同采集方案具有普适性的处理对策。采用上述方法在莺歌海盆地L工区进行实际资料的应用,得出底辟模糊区核部地震资料信噪比得到提升,有效地层清晰成像,井震相关系数比原老资料提高了38%,深度域构造与测井吻合,特别是老资料重处理的效果明显,成像质量不亚于新采集资料,验证了本方法对于底辟模糊区成像挖潜的有效性,可为后续类似领域的采集及处理提供借鉴。
Diapir zone has great potential for oil and gas exploration,but due to the shallow gas clouds,its poor imaging quality and inaccurate structure in seismic section bring difficulties to the implementation of potential targets of oil bearing structures on the periphery.To solve the problem of fuzzy zone imaging,this paper discusses the practice of fuzzy zone seismic acquisition in recent years,analyses the advantage of new acquisition and the common characteristics of old and new seismic data of different periods,based on several key processing techniques,including the protection of weak signals processing,high resolution velocity inversion and Q PSDM,puts forward some universality strategy for different acquisitions.In Yinggehai L Basin processing practices,the signal-to-noise ratio of the seismic data in the core of diapir fuzzy area is improved,the correlation coefficient of well earthquake is increased by 38%compared with the original processing,the depth domain structure is in good agreement with the measured well,especially the reprocessing image quality of the old data is as good as the new data,which verify the effectiveness of this method for exploring the potential of diapiric fuzzy region imaging,and can provide a reference for the subsequent acquisition and processing of similar areas.
作者
支玲
史文英
李三福
刘凯
张健男
Zhi Ling;Shi Wenying;Li Sanfu;Liu Kai;Zhang Jiannan(Institute of Geophysical Exploration,Geophysical-China Oilfield Services Limit,Zhanjiang Guangdong 524057,China;Hainan Branch,CNOOC Ltd.,Haikou Hainan 570100,China)
出处
《工程地球物理学报》
2024年第3期484-493,共10页
Chinese Journal of Engineering Geophysics
基金
中海石油湛江分公司生产科研项目(编号:CCL2020ZJFN0211)。
关键词
底辟模糊区
弱信号保幅处理
FWI反演
Q层析
Q深度偏移
diapir fuzzy zone
weak signal amplitude-preserved processing
full waveform inversion
Q tomography
Q depth migration
