基于模型的P-SV转换波AVA反演预处理
|
摘要
转换波AVA反演是利用转换波资料获取地下弹性参数的有效手段,AVA道集的准确抽取是利用AVA道集进行转换波资料反演的前提。基于模型抽取共转换点道集的处理思路是:首先依据目的层构造模型,采用基于模型的转换波速度分析方法获取目标层的纵横波速度比,在此基础上计算各道对应的转换点位置,进而抽取共转换点道集;以获得的共转换点道集为输入数据,采用三参量速度分析与动校正技术实现转换波资料动校正;在均方根意义下通过求取转换波的射线路径获得入射角信息并最终抽取转换波AVA反演道集。另外为消除因入射角分布不均造成的空道现象,提出了大面元法,该方法不仅对缺失的入射角有补偿作用,还能在一定程度上提高地震资料的信噪比。
Converted wave AVA inversion is an effective method to get underground elastic parameters using converted wave data,while collecting AVA gathers accurately is the condition to use AVA gathers to invert.The article collected common conversion point gather on the base of model,first,we used the tectonic model of intended interval,then got the velocity ratio of the intended interval using the converted wave analysis method basing on model,and got the accurate converted point,then collected common conversion point gather using the common conversion point gather data,used the three parameters velocity analysis and NMO correction to carry out the converted wave NMO correction;then got the incident angle and eventually collected the converted wave AVA inversion gather by calculating the converted wave ray path.This article also presented a method to eliminate the phenomenon of the zero gather caused by the uneven angle distribution,and data processing achieved good effect.Besides,to eliminate the phenomenon of the zero gather caused by the uneven angle distribution,the article presented binning method,this method not only can compensate the lacking incident angles,but also improve the signal to noise ratio of the seismic data
Converted wave AVA inversion is an effective method to get underground elastic parameters using converted wave data,while collecting AVA gathers accurately is the condition to use AVA gathers to invert.The article collected common conversion point gather on the base of model,first,we used the tectonic model of intended interval,then got the velocity ratio of the intended interval using the converted wave analysis method basing on model,and got the accurate converted point,then collected common conversion point gather using the common conversion point gather data,used the three parameters velocity analysis and NMO correction to carry out the converted wave NMO correction;then got the incident angle and eventually collected the converted wave AVA inversion gather by calculating the converted wave ray path.This article also presented a method to eliminate the phenomenon of the zero gather caused by the uneven angle distribution,and data processing achieved good effect.Besides,to eliminate the phenomenon of the zero gather caused by the uneven angle distribution,the article presented binning method,this method not only can compensate the lacking incident angles,but also improve the signal to noise ratio of the seismic data
引文
[1]Dai H,Li X Y,Mueller M.The effects of gas clouds on converted-wave imaging:a case study from Valhall[M]//62nd EAGE Meeting,Expanded Abstracts,Scotland:Glasgow,2000:103.
[2]黄绪德,杨文霞.转换波地震勘探[J].北京:石油工业出版社,2008.10.165-177.
[3]SUN J G.Limited-aperture migration[J].Geophysics,1997,65(2):584-595.
[4]ZHANG Y,ZHANG G Q,BLEISTEIN N.Theory of true-amplitudeone-way wave equations and true-amplitude common-shot migration[J].Geophysics,2005,70(4):E1-E10.
[5]陈建江,印兴耀,张广智.基于贝叶斯理论的振幅随偏移距变化三参数同步反演[J].中国石油大学学报:自然科学版,2007,31(3):33-38.
[6]刘书会,徐仁,张昊.基于贝叶斯估计的叠前反演技术在平湖油气田的应用[J].油气地质与采收率,2010,17(4):29-32.
[7]师素珍,韩毅,刘万金,等.含煤地层AVO正演模型参数优选分析[J].中国煤炭地质,2009,21(4):55-58.
[8]杨金华,李国发,刘洋,等.弹性阻抗反演在塔里木油田吉南地区储层预测中的应用(英文)[J].Applied Geophysics,2007,4(03):201-206.
[9]BANCROFT J C,GEIGER H D,MARGRAVE G F.The equivalentoffset method of prestack time migration[J].Geophysics,1998,63(6):2042-2053.
[10]殷文.叠前弹性波反演非线性优化方法[J].中国石油大学学报:自然科学版,2008,32(3):45-49.
[11]陈天胜,刘洋,魏修成.纵波和转换波联合AVO反演方法研究[J].中国石油大学学报:自然科学版,2006,30(1):33-37.
[12]冯世民,冯鑫,李雅玲.地震资料叠前时间偏移处理在徐庄煤矿西部采区的应用[J].中国煤炭地质,2009,21(1):55-58.
[13]范国苗,何兵寿.P-SV转换波真振幅DMO[J].中国煤炭地质,2009,21(7):49-52.
[14]殷全增.地层倾角对转换波动校速度分析的影响[J].中国煤炭地质,2010,22(7):52-56.
[15]禹凤林,卢君实.地层倾角对转换波抽道集的影响[J].中国煤炭地质,2009,21(4):59-61.
[16]许崇宝.测井约束地震反演分辨率及反演策略探讨[J].中国煤炭地质,2010,22(8):39-41.
[17]李彦星.基阶和高阶瑞雷波频散曲线反演对比分析[J].中国煤炭地质,2010,22(5):56-58,62.
[18]苑春方,彭苏萍,唐俐威,等.含有旅行时间的水平反射界面上P-SV转换波转换点坐标的唯一解析解[J].地球物理学进展,2006,21(4):1127-1131.
[19]李录明,罗省贤.P-SV转换波速度分析及解释方法[J].石油地球物理勘探,1995,30(1):66-74.
[20]帕力旦.赛力提尼亚孜,张知难.试射法在求解二阶线性微分方程边值问题中的应用[J].新疆大学学报(自然科学版),2006,1(23):39-43.
[21]郭向宇,凌云,魏修成.PS转换波共转换点的几种计算方法及实际应用[J].石油物探,2002,(2):141-148.
[22]何兵寿,张会星,崔小芹.转换波精确无迭代速度分析[J].物探与化探,2005,5(29):443-446.
[2]黄绪德,杨文霞.转换波地震勘探[J].北京:石油工业出版社,2008.10.165-177.
[3]SUN J G.Limited-aperture migration[J].Geophysics,1997,65(2):584-595.
[4]ZHANG Y,ZHANG G Q,BLEISTEIN N.Theory of true-amplitudeone-way wave equations and true-amplitude common-shot migration[J].Geophysics,2005,70(4):E1-E10.
[5]陈建江,印兴耀,张广智.基于贝叶斯理论的振幅随偏移距变化三参数同步反演[J].中国石油大学学报:自然科学版,2007,31(3):33-38.
[6]刘书会,徐仁,张昊.基于贝叶斯估计的叠前反演技术在平湖油气田的应用[J].油气地质与采收率,2010,17(4):29-32.
[7]师素珍,韩毅,刘万金,等.含煤地层AVO正演模型参数优选分析[J].中国煤炭地质,2009,21(4):55-58.
[8]杨金华,李国发,刘洋,等.弹性阻抗反演在塔里木油田吉南地区储层预测中的应用(英文)[J].Applied Geophysics,2007,4(03):201-206.
[9]BANCROFT J C,GEIGER H D,MARGRAVE G F.The equivalentoffset method of prestack time migration[J].Geophysics,1998,63(6):2042-2053.
[10]殷文.叠前弹性波反演非线性优化方法[J].中国石油大学学报:自然科学版,2008,32(3):45-49.
[11]陈天胜,刘洋,魏修成.纵波和转换波联合AVO反演方法研究[J].中国石油大学学报:自然科学版,2006,30(1):33-37.
[12]冯世民,冯鑫,李雅玲.地震资料叠前时间偏移处理在徐庄煤矿西部采区的应用[J].中国煤炭地质,2009,21(1):55-58.
[13]范国苗,何兵寿.P-SV转换波真振幅DMO[J].中国煤炭地质,2009,21(7):49-52.
[14]殷全增.地层倾角对转换波动校速度分析的影响[J].中国煤炭地质,2010,22(7):52-56.
[15]禹凤林,卢君实.地层倾角对转换波抽道集的影响[J].中国煤炭地质,2009,21(4):59-61.
[16]许崇宝.测井约束地震反演分辨率及反演策略探讨[J].中国煤炭地质,2010,22(8):39-41.
[17]李彦星.基阶和高阶瑞雷波频散曲线反演对比分析[J].中国煤炭地质,2010,22(5):56-58,62.
[18]苑春方,彭苏萍,唐俐威,等.含有旅行时间的水平反射界面上P-SV转换波转换点坐标的唯一解析解[J].地球物理学进展,2006,21(4):1127-1131.
[19]李录明,罗省贤.P-SV转换波速度分析及解释方法[J].石油地球物理勘探,1995,30(1):66-74.
[20]帕力旦.赛力提尼亚孜,张知难.试射法在求解二阶线性微分方程边值问题中的应用[J].新疆大学学报(自然科学版),2006,1(23):39-43.
[21]郭向宇,凌云,魏修成.PS转换波共转换点的几种计算方法及实际应用[J].石油物探,2002,(2):141-148.
[22]何兵寿,张会星,崔小芹.转换波精确无迭代速度分析[J].物探与化探,2005,5(29):443-446.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心