郭雪豹;王建民;王维红;王云专;柯璇;刘诗竹;

• 1:东北石油大学地球科学学院

• 2:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

基于VSP观测系统,利用VSP数据高分辨率、高信噪比的优势,采用叠前深度逆时偏移方法对VSP数据进行成像,并与地面地震叠前深度逆时偏移的成像效果比较,分析各自的成像优势及特点;在偏移处理过程中采用GPU并行加速,与传统CPU算法相对比.模型测试结果表明:VSP数据逆时偏移对地下深部地层及井旁微幅构造具有比地面地震逆时偏移更好的成像效果,而在浅层部分因接收不到浅层反射信息而不如地面地震成像清晰;在计算效率方面,GPU算法较原CPU算法提高70倍以上.该研究对深层复杂构造勘探具有一定的指导作用.

关键词(KeyWords)：VSP;逆时偏移;GPU;并行计算;复杂构造

Abstract:

Keywords:

基金项目(Foundation):黑龙江省教育厅科学技术研究项目(12511025)

作者(Author):郭雪豹;王建民;王维红;王云专;柯璇;刘诗竹;

Email:

参考文献(References)：

• [1]Baysal E,Kosloff D D,Sherwood W C.Reverse time migration[J].Geophysics,1983,48(11):1514-1524.

• [2]Whitmore N D.Iterative depth migration by backward time propagation[C]∥SEG Technical Program Expanded Abstracts,1983:382

• [3]McMechan G A.Migration by extrapolation of time-dependent boundary values[J].Geophysical Prospecting,1983,31(3):413-420.

• [4]Loewenthal D,Mulfti I R.Reversed time migration in spatial frequency domain[J].Geophysics,1983,48(5):627-635.

• [5]郭建.VSP技术应用现状及发展趋势[J].勘探地球物理进展,2004,27(1):1-8.Guo Jian.The application status and development trends of VSP technology[J].Progress in Exploration Geophysics,2004,27(1):1-8.

• [6]朱金明,颜俊华.VSP逆时偏移[J].石油地球物理勘探,1991,26(5):564-570.Zhu Jinming,Yan Junhua.VSP reverse-time migration[J].Oil Geophysical Prospecting,1991,26(5):564-570.

• [7]孙文博,孙赞东.基于伪谱法的VSP逆时偏移及其应用研究[J].地球物理学报,2010,53(9):2196-2203.Sun Wenbo,Sun Zandong.VSP reverse time migration based on the pseudo-spectral method and its applications[J].Chinese J.Geophys,2010,53(9):2196-2203.

• [8]Alok K S,Xander S,Eric V.VSP imaging using all multiples:Full wavefield migration approach[C]∥SEG Technical Program Expanded Abstracts,2012:1-6.

• [9]Sun Wenbo,Sun Zandong.Angle-domain VSP reverse-time migration and its application[C]∥SEG Technical Program Expanded Abstracts,2010:4339-4343.

• [10]Mark E W,Lu Rongrong,Xander C,et al.A novel application of time-reversed acoustic:Salt-dome flank imaging using walkaway VSP survey[J].Geophysics,2006,71(2):A7-A11.

• [11]刘红伟,李博,刘洪.地震叠前逆时偏移高阶有限差分算法及GPU实现[J].地球物理学报,2010,53(7):1725-1733.Liu Hongwei,Li Bo,Liu Hong.The algorithm of high order finite difference pre-stack reverse time migration and GPU implementation[J].Chinese J.Geophys,2010,53(7):1725-1733.

• [12]刘洋,李承楚,牟永光.任意偶数阶精度的有限差分数值模拟方法[J].石油地球物理勘探,1998,33(1):1-10.Liu Yang,Li Chengchu,Mu Yongguo.Finite-difference numerical modeling of any even-order accuracy[J].Oil Geophysical Prospecting,1998,33(1):1-10.

• [13]李博,刘红伟,刘国峰,等.地震叠前逆时偏移算法的CPU/GPU实施对策[J].地球物理学报,2010,53(12):2938-2943.Li Bo,Liu Hongwei,Liu Guofeng,et al.Computational strategy of seismic pre-stack reverse time migration on CPU/GPU[J].Chinese J.Geophys,2010,53(12):2938-2943.

• [14]石颖,陆加敏,柯璇,等.基于GPU并行加速的叠前逆时偏移方法研究[J].东北石油大学学报,2012,36(4):111-115.Shi Ying,Lu Jiamin,Ke Xuan,et al.Prestack reverse time migration based on GPU parallel accelerating algorithm[J].Journal of Northeast Petroleum University,2012,36(4):111-115.

• [15]柯璇,石颖,刘诗竹.地震资料逆时偏移中的图像处理器加速算法[J].计算机系统应用,2013,22(11):115-118.Ke Xuan,Shi Ying,Liu Shizhu.GPU acceleration algorithm of the reverse time migration with seismic data[J].Computer Systems&Applications,2013,22(11):115-118.

• [16]郭念民,吴国忱.基于PML边界的变网格高阶有限差分声波方程逆时偏移[J].石油地球物理勘探,2012,47(2):256-265.Guo Nianmin,Wu Guochen.Highorder finite difference method in reverse-time migration with variable grids based on PML boundary condition[J].Oil Geophysical Prospecting,2012,47(2):256-265.

• [17]王守东.声波方程完全匹配层吸收边界[J].石油地球物理勘探,2003,38(1):31-34.Wang Shoudong.Absorbing boundary condition for acoustic wave equation by perfectly matched layer[J].Oil Geophysical Prospecting,2003,38(1):31-34.

• [18]王永刚,邢文军,谢万学,等.完全匹配层吸收边界条件的研究[J].中国石油大学学报:自然科学版,2007,31(1):19-24.Wang Yonggang,Xing Wenjun,Xie Wanxue,et al.Study of absorbing boundary condition by perfectly matched layer[J].Journal of China University of Petroleum:Natural Science Edition,2007,31(1):19-24.

• [19]胡昊,刘伊克,常旭,等.逆时偏移计算中的边界处理分析及应用[J].地球物理学报,2013,56(6):2033-2042.Hu Hao,Liu Yike,Chang Xu,et al.Analysis and application of boundary treatment for the computation of reverse-time migration[J].Chinese J.Geophys,2013,56(6):2033-2042.

• [20]薛东川,张云鹏,朱振宇,等.几种叠前逆时偏移成像条件的比较[C].中国地球物理,2012:581.Xue Dongchuan,Zhang Yunpeng,Zhu Zhenyu,et al.Comparison of several imaging condition for prestack reverse-time migration[C].The Chinese Geophysical,2012:581.

• [21]刘红伟,刘洪,邹振,等.地震叠前逆时偏移中的去噪与存储[J].地球物理学报,2010,53(9):2171-2180.Liu Hongwei,Liu Hong,Zou Zhen,et al.The problems of denoise storage in seismic reverse time migration[J].Chinese J.Geophys.,2010,53(9):2171-2180.

• [22]Zhang Y,Sun J.Practical issues in reverse time migration:true amplitude gathers,noise removal and harmonic source encoding[J].First Break,2009,26(1):29-35.

• [23]陈可洋.基于拉普拉斯算子的叠前逆时噪声压制方法[J].岩性油气藏,2011,23(5):87-95.Chen Keyang.Pre-stack reverse-time noise suppressing method based on Laplacian operator[J].Lithologic Reservoirs,2011,23(5):87-95.