井间地震直达波和反射波联合层析成像及应用
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摘要
本文利用直达波的旅行时与反射波的旅行时联合反演两井之间的速度分布,在计算方法中加入声波测井获得边界上的先验信息,如慢度分布和反射层位置,可提高计算时的收敛性能与计算效率。在层析反演过程中,采用阻尼LSQR算法求解,在求解的过程中施加一定的阻尼,能有效地抑制数据误差较大时的影响,提高反演的抗噪声能力。应用正演模型验证了方法的可行性。实际资料处理表明,该方法的层析速度纵、横向分辨率较高,在井旁与声波速度吻合较好,计算精度较高。
The paper discusses a joint tomography of direct wave traveltime and reflection wave traveltime in crosswell seismic.Using direct wave traveltime and reflection wave traveltime between wells with well information such as slowness distributions and reflection interface positions,this tomography method benefits a good astringency.The damp LSQR arithmetic is applied in the tomography procedure.It can effectively improve de-noise ability.Its application to the forward modeling proves its feasibility.Applications to field datasets indicate that high resolutions are obtained for both vertical and horizontal direction;and good velocity matching around the wells.
The paper discusses a joint tomography of direct wave traveltime and reflection wave traveltime in crosswell seismic.Using direct wave traveltime and reflection wave traveltime between wells with well information such as slowness distributions and reflection interface positions,this tomography method benefits a good astringency.The damp LSQR arithmetic is applied in the tomography procedure.It can effectively improve de-noise ability.Its application to the forward modeling proves its feasibility.Applications to field datasets indicate that high resolutions are obtained for both vertical and horizontal direction;and good velocity matching around the wells.
引文
[1]刘玉柱,丁孔芸,董良国.初至波走时层析成像对初始模型的依赖性.石油地球物理勘探,2010,45(4):502~510Liu Yu-zhu,Ding Kong-yun and Dong Liang-guo.The dependence of first arrival travel ti me tomo-graphy on initial model.OGP,2010,45(4):502~510
[2]严又生,许增魁,宜明理等.激发井、接收井互换的井中地震观测方法.石油地球物理勘探,2008,43(5):489~492Yan You-sheng,Xu Zeng-kui,Yi Ming-li et al.Shooting hole and receiving hole transposed cross-hole seismic surveying method.OGP,2008,43(5):489~492
[3]段心标,金维浚.井间地震层析成像初始速度模型.地球物理学进展,2007,22(6):1831~1835Duan Xin-biao,Jin Wei-jun.Initial velocity model ofcrosswell seismic tomography.Progress in Geophys-ics,2007,22(6):1831~1835
[4]张建中,丁兴号.一种2.5维井间透射波层析成像方法.声学学报,2007,32(1):91~96Zhang Jian-zhong,Ding Xing-hao.An approach to 2.5-D crosswell seismic transmission tomography.Acta Acoustica,2007,32(1):91~96
[5]刘玉柱,董良国,夏建军.初至波走时层析成像中的正则化方法.石油地球物理勘探,2007,42(6):682~685Liu Yu-zhu,Dong Liang-guo and Xia Jian-jun.Nor-malized approach in tomographic i maging of firstbreaks travel ti me.OGP,2007,42(6):682~685
[6]井西利.复杂介质的层析建模及模型反演.石油地球物理勘探,2010,45(1):66~71Jing Xi-li.Tomography modeling for complex mediaand tests on models.OGP,2010,45(1):66~71
[7]刘劲松,刘福田,刘俊等.地震层析成像LSQR算法的并行化.地球物理学报,2006,49(2):540~545Liu Jin-Song,Liu Fu-Tian,LiuJun.Parallel LSQRalgorithms used in seismic tomography.ChineseJournal of Geophysics,2006,49(2):540~545
[8]杨薇,刘四新,冯彦谦.跨孔层析成像LSQR算法研究.物探与化探,2008,32(2):199~202Yang Wei,Liu Si-xin,Feng Yan-qian.A study ofthe LSQRalgorithmfor cross-hole tomography.Geo-physical and Geochemical Exploration,2008,32(2):199~202
[9]孔庆丰,王延光,左建军等.井间地震有限角度叠加方法研究与应用.石油地球物理勘探,2007,42(3):256~258 Kong Qing-feng,Wang Yan-guang,Zuo Jian-jun etal.Study and application of finite-angle stack ap-proachin cross-hole seismology.OGP,2007,42(3):256~258
[10]左建军,林松辉,孔庆丰等.井间地震技术在永新地区的应用.物探与化探,2009,33(5):557~561Zuo Jian-jun,Lin Song-hui,Kong Qing-feng et al.The application of the crosswell seismic technologyinYongxin Area.Geophysical and Geochemical Explo-ration,2009,33(5):557~561
[2]严又生,许增魁,宜明理等.激发井、接收井互换的井中地震观测方法.石油地球物理勘探,2008,43(5):489~492Yan You-sheng,Xu Zeng-kui,Yi Ming-li et al.Shooting hole and receiving hole transposed cross-hole seismic surveying method.OGP,2008,43(5):489~492
[3]段心标,金维浚.井间地震层析成像初始速度模型.地球物理学进展,2007,22(6):1831~1835Duan Xin-biao,Jin Wei-jun.Initial velocity model ofcrosswell seismic tomography.Progress in Geophys-ics,2007,22(6):1831~1835
[4]张建中,丁兴号.一种2.5维井间透射波层析成像方法.声学学报,2007,32(1):91~96Zhang Jian-zhong,Ding Xing-hao.An approach to 2.5-D crosswell seismic transmission tomography.Acta Acoustica,2007,32(1):91~96
[5]刘玉柱,董良国,夏建军.初至波走时层析成像中的正则化方法.石油地球物理勘探,2007,42(6):682~685Liu Yu-zhu,Dong Liang-guo and Xia Jian-jun.Nor-malized approach in tomographic i maging of firstbreaks travel ti me.OGP,2007,42(6):682~685
[6]井西利.复杂介质的层析建模及模型反演.石油地球物理勘探,2010,45(1):66~71Jing Xi-li.Tomography modeling for complex mediaand tests on models.OGP,2010,45(1):66~71
[7]刘劲松,刘福田,刘俊等.地震层析成像LSQR算法的并行化.地球物理学报,2006,49(2):540~545Liu Jin-Song,Liu Fu-Tian,LiuJun.Parallel LSQRalgorithms used in seismic tomography.ChineseJournal of Geophysics,2006,49(2):540~545
[8]杨薇,刘四新,冯彦谦.跨孔层析成像LSQR算法研究.物探与化探,2008,32(2):199~202Yang Wei,Liu Si-xin,Feng Yan-qian.A study ofthe LSQRalgorithmfor cross-hole tomography.Geo-physical and Geochemical Exploration,2008,32(2):199~202
[9]孔庆丰,王延光,左建军等.井间地震有限角度叠加方法研究与应用.石油地球物理勘探,2007,42(3):256~258 Kong Qing-feng,Wang Yan-guang,Zuo Jian-jun etal.Study and application of finite-angle stack ap-proachin cross-hole seismology.OGP,2007,42(3):256~258
[10]左建军,林松辉,孔庆丰等.井间地震技术在永新地区的应用.物探与化探,2009,33(5):557~561Zuo Jian-jun,Lin Song-hui,Kong Qing-feng et al.The application of the crosswell seismic technologyinYongxin Area.Geophysical and Geochemical Explo-ration,2009,33(5):557~561
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