南黄海盆地地震波传播特征分析
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摘要
针对南黄海盆地浅水区域,利用拟Q谱法反演Q值来建立大致符合工区实际的吸收衰减模型,并使用射线参数泰勒展开法,计算地层累积吸收衰减量在不同偏移距、不同频率和不同深度下的变化情况。在此基础上,建立了理论速度模型,并利用二维有限差分声波方程模拟技术进行单炮地震记录正演,通过速度谱分析,以了解该工区浅水域多次波的发育情况。理论与实际数据分析显示,该工区的浅层衰减占主导作用,多次波能量较强,干扰严重。
Aiming at the shallow water areas of the South Yellow Sea Basin,using the Q value inversed by pseudo-Q spectral method to build a realistic absorption attenuation model.And then using the ray parameter Taylor expansion method to calculate the variation of cumulative absorption attenuation of formation in different offsets,different frequencies and different depths.On this basis,the authors build a theoretical speed model and do single shot seismic record forward modeling using two-dimensional finite difference acoustic wave equation,and through the speed spectrum analysis to understand the development of multiple waves in shallow water situation of the studied area.Theoretical and practical data analysis shows that the shallow attenuation effect take the dominant position in studied area,the energy of multiple waves is strong with serious interference.
Aiming at the shallow water areas of the South Yellow Sea Basin,using the Q value inversed by pseudo-Q spectral method to build a realistic absorption attenuation model.And then using the ray parameter Taylor expansion method to calculate the variation of cumulative absorption attenuation of formation in different offsets,different frequencies and different depths.On this basis,the authors build a theoretical speed model and do single shot seismic record forward modeling using two-dimensional finite difference acoustic wave equation,and through the speed spectrum analysis to understand the development of multiple waves in shallow water situation of the studied area.Theoretical and practical data analysis shows that the shallow attenuation effect take the dominant position in studied area,the energy of multiple waves is strong with serious interference.
引文
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[7]梁光河,刘清林,何樵登.用非线性参数拟合法反演Q值[J].石油地球物理勘探,1992,27(2):230- 234. LIANG Guang-he,LIU Qing-lin,HE Qiao-deng.Fitting with the nonlinear parameter Q value inversion[J].Oil Geophysical Prospecting,1992,27(2):230-234.
[8]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993:31-44. LI Qing-zhong.Towards the road of precise exploration [M].Beijing:Petroleum Industry Publishing House, 1993:31-44.
[9]卢秀丽,何樵登,孙鹏远.南海琼东南几工区地层吸收衰减模型研究[J].石油物探,2004,43(2): 116.117. LU Xiu-li,HE Qiao-deng,SUN Peng-yuan.Nanhai Qiong work area southeast of formation of several absorption attenuation model[J].Geophysical Prospecting for Petroleum,2004,43(2):116,117.
[10]曲希玉,陈建文,徐淑艳,等.南黄海盆地北部坳陷白垩系地震相分析[J].世界地质,2005,24 (2):131-136. QU Xi-yu,CHEN Jian-wen,XU Shu-yan,et al.Cretaceous seismic facies analysis of northern South Yellow Sea Basin[J].Global Geology,2005,24(2):131- 136.
[11]吴志强,施剑,童思友,等.南黄海沉积层地震反射特征模拟分析与勘探技术选择的思考[J].海洋地质动态,2010,26(12):14-18. WU Zhi-qiang,SHI Jian,TONG Si-you,et al.A discussion on seismic reflection characteristic of subsurface sediments in the South Yellow Sea and optimization of exploration technology[J].Marine Geology Letters, 2010,26(12):14-18.
[12]张一波,刘怀山,吴志强.南黄海多次波特征及其速度分析[J].海洋地质动态,2008,24(8):8-13. ZHANG Yi-bo,LIU Huai-shan,WU Zhi-qiang.Characteristics analysis of the South Yellow Sea and the speed of multiple waves[J].Marine Geology Letters, 2008,24(8):8-13.
[13]吴志强,温珍河.南黄海前古近系油气地震勘探策略[J].海洋地质动态,2006,22(6):20-24. WU Zhi-qiang,WEN Zhen-he.Strategy of seismic exploration for Pre-tertiary oil and gas in the South Yellow Sea[J].Marine Geology Letters,2006,22(6):20- 24.
[2]辛可锋,李振春,王永刚,等.地层等效吸收系数反演[J].石油物探,2001,40(4):14-20. XIN Ke-feng,LI Zhen-chun,WANG Yong-gang,et al. Formation equivalent absorption coefficient inversion [J].Geophysical Prospecting for Petroleum,2001,40 (4):14-20.
[3]钱绍蝴,高建华,谷永兴,等.地层吸收衰减模型的制作及补偿方法的研究[J].石油地球物理勘探, 1998,33(增刊1):18-24. QIAN Shao-hu,GAO Jian-hua,GU Yong-xing,et al. Stratigraphic model of production and attenuation compensation method[J].Oil Geophysical Prospecting,1998, 33(Suppl.1):18-24.
[4]何汉漪.海上高分辨率地震技术及其应用[M].北京:地质出版社,2001:27-33. HE Han-yi.High resolution marine seismic technology and its applications[M].Beijing:Geological Publishing House,2001:27-33.
[5]何樵登,梁光河.用非线性参数曲线拟合法反演Q值[J].世界地质,1990,2(1):4-10. HE Qiao-deng,LIANG Guang-he.Using nonlinear parameter curve fitting for Q value inversion[J].Global Geology,1990,2(1):4-10.
[6]刘冰,王德利,巩向博,等.基于VSP资料进行的吸收系数Q值反演[J].吉林大学学报:地球科学版, 2007,37(9):49-52. LIU Bing,WANG De-li,GONG Xiang-bo,et al.Absorption coefficient quality factor(Q) inversion based on VSP data[J].Journal of Jilin University:Earth Science Edition,2007,37(9):49-52.
[7]梁光河,刘清林,何樵登.用非线性参数拟合法反演Q值[J].石油地球物理勘探,1992,27(2):230- 234. LIANG Guang-he,LIU Qing-lin,HE Qiao-deng.Fitting with the nonlinear parameter Q value inversion[J].Oil Geophysical Prospecting,1992,27(2):230-234.
[8]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993:31-44. LI Qing-zhong.Towards the road of precise exploration [M].Beijing:Petroleum Industry Publishing House, 1993:31-44.
[9]卢秀丽,何樵登,孙鹏远.南海琼东南几工区地层吸收衰减模型研究[J].石油物探,2004,43(2): 116.117. LU Xiu-li,HE Qiao-deng,SUN Peng-yuan.Nanhai Qiong work area southeast of formation of several absorption attenuation model[J].Geophysical Prospecting for Petroleum,2004,43(2):116,117.
[10]曲希玉,陈建文,徐淑艳,等.南黄海盆地北部坳陷白垩系地震相分析[J].世界地质,2005,24 (2):131-136. QU Xi-yu,CHEN Jian-wen,XU Shu-yan,et al.Cretaceous seismic facies analysis of northern South Yellow Sea Basin[J].Global Geology,2005,24(2):131- 136.
[11]吴志强,施剑,童思友,等.南黄海沉积层地震反射特征模拟分析与勘探技术选择的思考[J].海洋地质动态,2010,26(12):14-18. WU Zhi-qiang,SHI Jian,TONG Si-you,et al.A discussion on seismic reflection characteristic of subsurface sediments in the South Yellow Sea and optimization of exploration technology[J].Marine Geology Letters, 2010,26(12):14-18.
[12]张一波,刘怀山,吴志强.南黄海多次波特征及其速度分析[J].海洋地质动态,2008,24(8):8-13. ZHANG Yi-bo,LIU Huai-shan,WU Zhi-qiang.Characteristics analysis of the South Yellow Sea and the speed of multiple waves[J].Marine Geology Letters, 2008,24(8):8-13.
[13]吴志强,温珍河.南黄海前古近系油气地震勘探策略[J].海洋地质动态,2006,22(6):20-24. WU Zhi-qiang,WEN Zhen-he.Strategy of seismic exploration for Pre-tertiary oil and gas in the South Yellow Sea[J].Marine Geology Letters,2006,22(6):20- 24.
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