高分辨精细成像技术在川西北双鱼石地区的应用
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摘要
川西北龙门山前带地表起伏剧烈、出露岩性变化快,目的层埋藏深、储层单层厚度薄,且断裂发育,同时地下构造复杂,导致地震波场复杂,储层地震响应特征不清,保幅保真高分辨率偏移及准确成像难度大。结合GeoEast系统处理解释一体化的优势,运用微测井约束层析静校正、地表地下一体化建模、OVT处理技术、Q深度偏移特色技术,对工区地震资料进行针对性处理。在保真保幅的基础上获取了宽频地震资料,其断层、断点归位准确,波组响应特征清晰,为川西北双鱼石地区目的层构造解释、储层精细描述提供了良好的地震资料,有效支撑了探井、滚动评价井的部署跟踪、储量申报及开发试采方案编制工作。
Longmen Piedmont belt in Northwest Sichuan is characterized by intense surface undulation,rapid outcrop lithology change,target deep burial,thin beds,and well-developed faults.And complex underground structures lead to complex seismic wavefield,unclear seismic responses of reservoir.It is very difficult to achieve high-resolution migration imaging.To solve the problem,an integrated strategy is achieved with distinctive tools provided by GeoEast System.For data processing,uphole-information constrained tomography statics,integrated near-surface & subsurface velocity modeling,offset vector tile(OVT),and Q depth migration are used.The seismic data frequency band is broadened thanks to fidelity and preserved-amplitude approaches.Faults and breakpoints are highlighted and seismic response characteristics are much clearer,which provides good data for structural interpretation and reservoir description of targets in Shuangyushi Area,Northwest Sichuan,and effectively supports the well deployment and future exploration.
Longmen Piedmont belt in Northwest Sichuan is characterized by intense surface undulation,rapid outcrop lithology change,target deep burial,thin beds,and well-developed faults.And complex underground structures lead to complex seismic wavefield,unclear seismic responses of reservoir.It is very difficult to achieve high-resolution migration imaging.To solve the problem,an integrated strategy is achieved with distinctive tools provided by GeoEast System.For data processing,uphole-information constrained tomography statics,integrated near-surface & subsurface velocity modeling,offset vector tile(OVT),and Q depth migration are used.The seismic data frequency band is broadened thanks to fidelity and preserved-amplitude approaches.Faults and breakpoints are highlighted and seismic response characteristics are much clearer,which provides good data for structural interpretation and reservoir description of targets in Shuangyushi Area,Northwest Sichuan,and effectively supports the well deployment and future exploration.
引文
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[2] 肖富森,李政文,张华军,等.龙门山构造带北段地震、地质综合解释[J].天然气工业,2005,25(5):37-39.XIAO Fusen,LI Zhengwen,ZHANG Huajun,et al.Comprehensive interpretation of seismic and geological data in the north section of Longmen mountain structural belts[J].Natural Gas Industry,2005,25(5):37-39.
[3] 宋桂桥,于世焕.山前带地震勘探技术进展与对策研究[J].石油物探,2012,51(6):539-547.SONG Guiqiao and YU Shihuan.Progress and strategy of the seismic exploration in foothill area[J].Geophysical Prospecting for Petroleum,2012,51(6):539-547.
[4] 赵路子,张光荣,陈伟,等.深层复杂地质构造带地震勘探关键技术——以四川盆地龙门山断褶带北段为例[J].天然气工业,2018,38(1):39-48.ZHAO Luzi,ZHANG Guangrong,CHEN Wei,et al.Key seismic survey technologies for deep complex geological structures:A case study of the northern section of the Longmenshan Fault Fold Belt in the Sichuan Basin[J].Natural Gas Industry,2018,38(1):39-48.
[5] 梁勇,刘远志,余文科,等.地震弯线采集技术在龙门山双复杂区的应用[J].石油地质与工程,2012,26(5):45-48.LIANG Yong,LIU Yuanzhi,YU Wenke,et al.Application of curved line seismic acquisition technology in Longmenshan double complex area[J].Petroleum Geology and Engineering,2012,26(5):45-48.
[6] 曾庆才,曾同生,欧阳永林,等.复杂山地层析反演静校正新方法及应用[J].石油地球物理勘探,2017,52(3):418-425,441.ZENG Qingcai,ZENG Tongsheng,OUYANG Yonglin, et al.Tomographic inversion statics correction method and application for complex mountain[J].Oil Geophysical Prospecting,2017,52(3):418-425,441
[7] 王淑玲.约束层析静校正方法应用效果分析[J].石油物探,2012,51(4):383-387.WANG Shuling.Effect of constrained tomography static correction method[J].Geophysical Prospecting for Petroleum,2012,51(4):383-387.
[8] 崔栋,张研,胡英,等.近地表速度建模方法综述[J].地球物理学进展,2014,29(6):2635-2641.CUI Dong,ZHANG Yan,HU Ying,et al.The review of near surface velocity modeling[J].Progress in Geophysics,2014,29(6):2635-2641.
[9] Dai N X,Wu W and Liu H F.An explicit time evolution method for wave propagation[C].Beijing 2014 International Geophysical Conference & Exposition,2014,451-454.
[10] Zhang H and Zhang Y.Reverse time migration in ver-tical and tilted orthorhombic media[C].SEG Technical Program Expanded Abstracts,2011,30:185-189.
[11] 杨午阳,张厚柱,撒利明,等.逆时偏移关键问题讨论[J].石油地球物理勘探,2016,51(6):1251-1262.YANG Wuyang,ZHANG Houzhu,SA Liming,et al.Discussion on key issues of reverse time migration[J].Oil Geophysical Prospecting,2016,51(6):1251-1262.
[12] Vermeer G J O.Creating image gathers in the absence of proper common offset gather[J].Exploration Geo-physics,1998,29(4):636-642
[13] Cary P W.Common-offset-vector gathers:an alterna-tive to cross-spreads for wide-azimuth 3-D surveys[C].SEG Technical Program Expanded Abstracts,1999,18:1496-1499.
[14] 丁吉丰,裴江云,包燚.“两宽一高”资料处理技术在大庆油田的应用[J].石油地球物理勘探,2017,52(增刊1):10-16.DING Jifeng,PEI Jiangyun,BAO Yi.Broadband,wide-azimuth and high-density (BWH) seismic data processing technology in Daqing Oilfield[J].Oil Geophysical Prospecting,2017,52(S1):10-16
[15] 刘依谋,印兴耀,张三元,等.宽方位地震勘探技术新进展[J].石油地球物理勘探,2014,49(3):596-610.LIU Yimou,YIN Xingyao,ZHANG Sanyuan,et al.Recent advances in wide-azimuth seismic exploration[J].Oil Geophysical Prospecting,2014,49(3):596-610
[16] 段文胜,李飞,黄录忠,等.OVT域宽方位层析速度建模与深度域成像[J].石油地球物理勘探,2016,51(3):521-528.DUAN Wensheng,LI Fei,HUANG Luzhong.et al,Wide azimuth tomographic velocity model building and depth imaging in the OVT domain[J].Oil Geophysical Prospecting,2016,51(3):521-528
[17] 白英哲,孙赞东,周新源.Q偏移在塔里木盆地碳酸盐岩储层成像中的应用[J].石油地球物理勘探,2011,46(增刊1):7-11.BAI Yingzhe,SUN Zandong,ZHOU Xinyuan.Kirchhoff prestack depth Q-migration and application in Tarim carbonate reservoirs[J].Oil Geophysical Prospecting,2011,46(S1):7-11.
[18] 赵玲芝,张建磊,张魏毅.积分法Q成像技术的应用研究[J].石油地球物理勘探,2017,52(增刊2):86-90.ZHAO Lingzhi,ZHANG Jianlei,ZHANG Weiyi.Kirchhoff Q integration migration[J].Oil Geophysical Prospecting,2017,52(S2):86-90.