马昭军,沈杰,张剑飞
MA Zhaojun,SHEN Jie,ZHANG Jianfei

• 1:中国石化西南油气分公司勘探开发研究院

摘要(Abstract)：

地震采集、处理和解释技术支撑超深层油气勘探开发不断取得重大进展,地震资料成像精度直接影响构造解释的效果。根据超深层地震资料具有信噪比低、主频低、频带窄等特点,提出了保护和恢复弱反射信号的低频成像处理思路。为了提高超深层地震资料的成像精度,开展了保护低频弱去噪处理、弱信号恢复及补偿、保持信噪比提高分辨率和子波一致性处理、剩余静校正和速度分析迭代处理、超低频叠前时间偏移处理等关键技术研究。以CS地区二维地震资料进行了实际应用,改善了超深层地震资料的品质和成像效果。
Seismic acquisition, processing and interpreting techniques support the continuous significant progress of ultra-deep oil and gas exploration and development, and the imaging accuracy of the seismic data directly affects the effects of structural interpretation. According to the characteristics of the ultra-deep seismic data, such as low signal-to-noise ratio, low dornunant frequency, narrow frequency band and so on, the idea of low-frequency imaging processing is proposed to protect and recover the weak reflection signals. In order to improve the imaging accuracy of the ultra-deep seismic data, some key techniques, including low-frequency protection and weak denoising processing, weak signal recovery and compensation, maintaining signal-to-noise ratio and improving resolution and wavelet consistency processing, residual static correction and velocity analysis iterative processing, ultra-low-frequency prestack time migration processing and so forth, are studied. The practical application of 2 D seismic data in Area CS improves the quality and imaging effects of the ultra-deep seismic data.

关键词(KeyWords)： 超深层;低频;地震处理;反褶积;叠前时间偏移;成像
ultra-deep zone;low frequency;seismic processing;deconvolution;prestack time migration;imaging

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“川西山前带潮坪相白云岩储层地震预测应用研究”(2017ZX05005)

作者(Author): 马昭军,沈杰,张剑飞
MA Zhaojun,SHEN Jie,ZHANG Jianfei

DOI: 10.19597/j.issn.1000-3754.202006009

参考文献(References)：

• [1]李剑，佘源琦，高阳，等.中国陆上深层—超深层天然气勘探领域及潜力[J].中国石油勘探，2019,24(1):403-417.LI Jian,SHE Yuanqi,GAO Yang,et al.Onshore deep and ultra-deep natural gas exploration fields and potentials in China[J].China Petroleum Exploration,2019,24(1):403-417.
• [2]白国平，曹斌风.全球深层油气藏及其分布规律[J].石油与天然气地质，2014,35(1):19-25.BAI Guoping,CAO Binfeng.Characteristics and distribution patterns of deep petroleum accumulations in the world[J].Oil & Gas Geology,2014,35(1):19-25.
• [3]杨海军，李勇，唐雁刚，等.塔里木盆地克拉苏盐下深层大气田的发现[J].新疆石油地质，2019,40(1):12-20.YANG Haijun,LI Yong,TANG Yangang,et al.Discovery of Kelasu subsalt deep large gas field,Tarim Basin[J].Xinjiang Petroleum Geology,2019,40(1):12-20.
• [4]GUO X S,HU D F,LI Y P,et al.Theoretical process and key techonlogies of onshore ultra-deep oil/gas exploration[J].Engineering,2019,5(3):458-470.
• [5]张雪冰，李春红，孙淑春.深层火山岩目标处理技术在徐家围子地区的应用[J].大庆石油地质与开发，2009,28(6):328-331.ZHANG Xuebing,LI Chunhong,SUN shuchun.Application of target processing technique of deep-layer volcanic rock in Xujiaweizi region[J].Petroleum Geology & Oilfield Development in Daqing,2009,28(6):328-331.
• [6]陈志德，林文，郎钧.松辽—虎林盆地深反射地震资料处理[J].大庆石油地质与开发，2014,33(4):136-139.CHEN Zhide,LIN Wen,LANG Jun.Process of the deep seismic reflection data for Songliao-Hulin Basin[J].Petroleum Geology & Oilfield Development in Daqing,2014,33(4):136-139.