1. Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, Sanya, Hai-nan 572025, China; 2. Key Laboratory of Submarine Mineral Resources, Ministry of Natural Resources, Guangzhou, Guangdong 510760, China; 3. Academy of South China Sea Geological Science, China Geological Survey, Sanya, Hainan 572025, China; 4. School of Petroleum Engineering, Guangdong University of Petrochemical Technology, Mao-ming, Guangdong 525000, China
Abstract:As the structural and geological conditions of the Mesozoic of the northern South China Sea are more complex than those of the Cenozoic, conventional two-dimensional seismic data offers poor i-maging quality, which heavily restricts the implementation of oil and gas exploration targets. In response to the above problem, this study focused on tackling key issues for a quasi-three-dimensional (quasi-3D) seismic processing technology by investigating Target A in the Mesozoic of the Chaoshan Depression in the northern South China Sea and developed an integrated broadband and high-precision quasi-3D processing technology with the following technologies as its core: the τ-p-domain sparse inversion-based ghost wave attenuation by the bootstrap method, multiple elimination with the shallow water multiple attenuation (SWMA) + surface related multiple elimination (SRME) + Radon combination, 5D bin regularization by ma-tching pursuit and Fourier transform, and Gaussian beam prestack depth migration (CBM) based on velocity modeling combining full-waveform inversion (FWI) with fault-controlled tomographic inversion. The processing results reveal that the quality of the Mesozoic seismic data of Target A has been significantly improved, and the characteri-stics of the reflected wave groups and the development of faults in the formations are clear. This lays a solid foundation for the implementation of the Mesozoic traps in Target A and the evaluation of its oil and gas exploration potential. The proposed integrated broadband and high-precision quasi-3D processing technology is a set of practical technologies that well serve the oil and gas resource survey in the Mesozoic of the Chaoshan Depression in the northern South China Sea with complex sea conditions and complex structures. It also provides an important reference for oil and gas survey of similar marine targets around the world.
周蒂,陈汉宗,孙珍,等. 南海中生代三期海盆及其与特提斯和古太平洋的关系[J]. 热带海洋学报,2005,24(2):16-25.ZHOU Di,CHEN Hanzong,SUN Zhen,et al. Three mesozoic sea basins in eastern and southern South China sea and their relation to Tethys and Paleo-Pacific domains[J]. Journal of Tropical Oceanography,2005,24(2):16-25.
[2]
郝沪军,施和生,张向涛,等. 潮汕坳陷中生界及其石油地质条件——基于LF35-1-1探索井钻探结果的讨论[J]. 中国海上油气,2009,21(3):151-156.HAO Hujun,SHI Hesheng,ZHANG Xiangtao,et al. Mesozoic sediments and their petroleum geology conditions in Chaoshan sag:a discussion based on drilling results from the exploratory well LF35-1-1[J]. China Offshore Oil and Gas,2009,21(3):151-156.
[3]
姚永坚,高红芳,何家雄,等. 南海东北部潮汕坳陷及陆上邻区中生界烃源岩初步研究[J]. 天然气地球科学,2009,20(6):862-871.YAO Yongjian,GAO Hongfang,HE Jiaxiong,et al. Preliminary studies on the Mesozoic source rocks in Chaoshan depression,Northeastern South China Sea[J]. Natural Gas Geoscience,2009,20(6):862-871.
[4]
钟广见,吴世敏,冯常茂. 南海北部中生代沉积模式[J]. 热带海洋学报,2011,30(1):43-48.ZHONG Guangjian,WU Shimin,FENG Changmao. Sedimentary model of Mesozoic in the Northern South China Sea[J]. Journal of Tropical Oceanography,2011,30(1):43-48.
[5]
张青林,张航飞,张向涛,等. 南海北部潮汕坳陷上白垩统盆地原型及其大地构造背景分析[J]. 地球物理学报,2018,61(10):4308-4321.ZHANG Qinglin,ZHANG Hangfei,ZHANG Xiangtao,et al. The Upper Cretaceous prototype basin of the Chaoshan depression in the Northern South China sea and its tectonic setting[J]. Chinese Journal of Geophysics,2018,61(10):4308-4321.
[6]
邓桂林,丁龙翔,李福元,等. 海洋长排列单源单缆准三维窄方位地震资料处理技术[J]. 物探与化探,2019,43(4):828-834.DENG Guilin,DING Longxiang,LI Fuyuan,et al. The processing technology of narrow azimuth quasi three-dimensional seismic data acquisition by single source and single long streamer system in marine seismic exploration[J]. Geophysical and Geochemical Exploration,2019,43(4):828-834.
[7]
薛花,杜民,文鹏飞,等. 网格层析速度反演方法在准三维西沙水合物中的应用[J]. 物探与化探,2017,41(5):846-851.XUE Hua,DU Min,WEN Pengfei,et al. The application of grid tomography method to Quasi three-dimensional of Xisha hydrate[J]. Geophysical and Geochemical Exploration,2017,41(5):846-851.
[8]
张旭东,文鹏飞,徐云霞,等. 双源单缆方式采集的天然气水合物三维地震数据处理关键技术研究[J]. 地质论评,2015,61(增刊1):202-203.ZHANG Xudong,WEN Pengfei,XU Yunxia,et al. Research on the key technology of gas hydrate 3D seismic data processing acquired by dual-source single-cable method[J]. Geological Review,2015,61(S1):202-203.
[9]
MOMOH E,CANNAT M,WATREMEZ L,et al. Quasi-3-D seismic reflection imaging and Wide-Angle velocity structure of nearly amagmatic oceanic lithosphere at the Ultraslow-Spreading southwest Indian ridge[J]. Journal of Geophysical Research:Solid Earth,2017,122(12):9511-9533.
[10]
孙鸣,任金锋,钟广见,等. 南海北部东沙海域中生代地层的褶皱变形及其成因机制[J]. 地质评论,2018,64(4):828-842.SUN Ming,REN Jinfeng,ZHONG Guangjian,et al. Fold deformation of Mesozoic strata and their genetic mechanism in Southwestern Dongsha waters of Northern South China Sea[J]. Geological Review,2018,64(4):828-842.
[11]
舒业强,王强,俎婷婷. 南海北部陆架陆坡流系研究进展[J]. 中国科学(地球科学),2018,48(3):276-287.SHU Yeqiang,WANG Qiang,ZU Tingting. Research progress of continental slope current system on the Northern Shelf of the South China Sea[J].Scientia Sinica (Terrae),2018,48(3):276-287.
[12]
陈隽,郝沪军,林鹤鸣. 潮汕坳陷地震资料的改善及中生界构造的新发现[J]. 中国海上油气(地质),2002,16(4):271-278.CHEN Juan,HAO Hujun,LIN Heming. Quality improvement of seismic data and new identification of Mesozoic prospects in Chaoshan depression[J]. China Offshore Oil and Gas (Geology),2002,16(4):271-278.
[13]
邢涛,詹文欢,李福元,等. 东沙海域复杂海况下单源单缆长排列地震资料处理[J]. 热带海洋学报,2020,39(4):91-99.XING Tao,ZHAN Wenhuan,LI Fuyuan,et al. Single-source,single-cable,long-array,seismic data processing in complex sea conditions of Dongsha sea area[J]. Journal of Tropical Oceanography,2020,39(4):91-99.
[14]
钟明睿,刘金朋,王兴芝,等. 宽频地震处理技术在南海某工区的应用[J]. 世界地质,2016,35(3):873-880.ZHONG Mingrui,LIU Jinpeng,WANG Xingzhi,et al. Application of broad frequency seismic processing technique in one block of South China Sea[J]. Global Geology,2016,35(3):873-880.
[15]
杨金龙,WEGLEIN A B. 基于格林理论的鬼波压制方法及其应用[J]. 石油物探,2017,56(4):507-515.YANG Jinlong,WEGLEIN A B. A deghosting me-thod based on Green’s theorem and its application[J]. Geophysical Prospecting for Petroleum,2017,56(4):507-515.
WANG P,PENG C. Premigration deghosting for marine towed streamer data using a bootstrap approach[C]. SEG Technical Program Expanded Abstracts,2012,31:1-5.
[18]
张治忠,李三福,方中于,等. SWMA与SRME组合衰减自由界面多次波技术——在珠江口盆地A区的应用[J]. 物探化探计算技术,2016,38(2):244-251.ZHANG Zhizhong,LI Sanfu,FANG Zhongyu,et al. The combination of SWMA and SRME for surface- related multiple attenuation:case study in the A block of the Zhujiangkou basin[J]. Computing Techniques for Geophysical and Geochemical Exploration,2016,38(2):244-251.
[19]
张兴岩,朱江梅,杨薇,等. 海洋资料多次波组合衰减技术及应用[J]. 物探与化探,2011,35(4):511-515.ZHANG Xingyan,ZHU Jiangmei,YANG Wei,et al. Group technology of antimultiple in marine seismic data processing and its application[J]. Geophysical and Geochemical Exploration,2011,35(4):511-515.
[20]
贾连凯,吴时国,赵昌垒. 多次波压制技术在南海北部陆缘深水区的应用[J]. 地球物理学进展,2014,29(2):920-930.JIA Liankai,WU Shiguo,ZHAO Changlei. Application of multiple elimination techniques in the deepwater continental margin of Northern South Sea[J]. Progress in Geophysics,2014,29(2):920-930.
[21]
肖二莲,陈瑜,万欢,等. SRME多次波衰减方法在海洋地震资料中的应用[J]. 地球物理学进展,2010,25(3),:1057-1064.XIAO Erlian,CHEN Yu,WAN Huan,et al. Surface-related multiple elimination on marine seismic data[J]. Progress in Geophysics,2010,25(3):1057-1064.
[22]
张莉,王笑雪,韦振权,等. 南海北部陆坡区多次波组合压制技术[J]. 物探与化探,2015,39(5):985-993.ZHANG Li,WANG Xiaoxue,WEI Zhenquan,et al. Combination of multiple attenuation technique on the northern slope of the South China Sea[J]. Geophysical and Geochemical Exploration,2015,39(5):985-993.
[23]
曾华会,王孝,杨维,等. 分级组合多次波压制技术——以玛湖地区为例[J]. 石油地球物理勘探,2018,53(增刊2):13-19.ZENG Huahui,WANG Xiao,YANG Wei,et al. Stepped-combination multiples suppression:an example in Mahu Area[J]. Oil Geophysical Prospecting,2018,53(S2):13-19.
[24]
XU S,ZHANG Y,PHAM D,et al. Antileakage Fourier transform for seismic data regularization[J]. Geophysics,2005,70(4):V87-V95.
[25]
王兴芝,李添才,肖二莲,等. 基于反漏频傅里叶变换的数据规则化技术在海上三维拖缆地震资料处理中的应用[J]. 中国海上油气,2014,26(4):25-28.WANG Xingzhi,LI Tiancai,XIAO Erlian,et al. An application of data regularization based on anti-lea-kage Fourier transform to 3D marine seismic data processing by tow-cable[J]. China Offshore Oil and Gas,2014,26(4):25-28.
[26]
王伟,陈双廷,王宝彬,等. 五维规则化技术研究与应用[J]. 石油地球物理勘探,2017,52(增刊1):28-33.WANG Wei,CHEN Shuangting,WANG Baobin,et al. Application of 5D regularization in seismic data processing[J]. Oil Geophysical Prospecting,2017,52(S1):28-33.
[27]
段文胜,王鹏,党青宁,等. 应用匹配追踪傅里叶插值技术实现OVT域连片处理[J]. 石油地球物理勘探,2017,52(4):669-677.DUAN Wensheng,WANG Peng,DANG Qingning,et al. Application of matching pursuit Fourier interpolation technology to realize contiguous processing in OVT domain[J]. Oil Geophysical Prospecting,2017,52(4):669-677.
[28]
曹孟起,刘占族. 叠前时间偏移处理技术及应用[J]. 石油地球物理勘探,2006,41(3):286-289.CAO Mengqi,LIU Zhanzu. Prestack time migration processing technique and application[J]. Oil Geophysical Prospecting,2006,41(3):286-289.
[29]
马彦彦,李国发,张星宇,等. 叠前深度偏移速度建模方法分析[J]. 石油地球物理勘探,2014,49(4):687-693.MA Yanyan,LI Guofa,ZHANG Xingyu,et al. Ana-lysis of velocity modeling method for prestack depth migration[J]. Oil Geophysical Prospecting,2014,49(4):687-693.
[30]
崔永福,彭更新,吴国忱,等. 全波形反演在缝洞型储层速度建模中的应用[J]. 地球物理学报,2016,59(7):2713-2725.CUI Yongfu,PENG Gengxin,WU Guochen,et al. Application of full waveform inversion velocity model-building technology for the fractured-vuggy reservoir[J]. Chinese Journal of Geophysics,2016,59(7):2713-2725.
[31]
李黎,沈水荣,吴意明,等. 全波形反演与断控层析反演联合速度建模——以南海东部A油田为例[J]. 海上油气,2020,32(5):107-113.LI Li,SHEN Shuirong,WU Yiming,et al. Velocity modeling combining full waveform inversion with fault controlled tomographic inversion:a case study of A oilfield in the eastern South China Sea[J]. China Offshore Oil and Gas,2020,32(5):107-113.
[32]
李振春. 地震偏移成像技术研究现状与发展趋势[J]. 石油地球物理勘探,2014,49(1):1-21.LI Zhenchun. Research status and development trend of seismic migration imaging technology[J]. Oil Geophysical Prospecting,2014,49(1):1-21.
[33]
杨晓东,秦宁,王延光. 常用叠前深度偏移方法特点分析与实例对比[J]. 地球物理学进展,2015,30(2):740-745.YANG Xiaodong,QIN Ning,WANG Yanguang. Analysis and examples of commonly used prestack depth migration methods[J]. Progress in Geophy-sics,2015,30(2):740-745.
[34]
SCHNEIDER W A. Integral formulation for migration in two and three dimensions[J]. Geophysics,1978,43(1):49-76.
[35]
HILL N R. Prestack Gaussian-beam depth migration[J]. Geophysics,2001,66(4):1240-1250.
[36]
BAYSA1 E,KOSLOFF D D,SHERWOOD J W C. Reverse time migration[J]. Geophysics,1983,48(11):1514-1524.