基于AVA道集的井间地震上行反射P波分离方法的研究与应用
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摘要
针对井间地震资料处理中现有上行反射P波提取方法的不足,提出了基于AVA道集的三分量井间地震资料上行反射P波分离方法。首先对水平分量X和Y的直达波场进行水平定位,旋转得到两井平面内的径向分量R,然后对垂直分量Z和径向分量R进行直达波去除、管波衰减和上行波场分离,利用直达波层析反演结果建立速度模型,对垂直分量Z和径向分量R的上行波场分别进行上行反射P波射线追踪,得到两个相应的AVA道集,根据上行反射P波的入射角大小进行上行反射P波分离和提取,最后完成上行反射P波的叠加成像。模型计算和实际资料的处理结果表明,该方法可以有效提取三分量资料的上行反射P波能量,保证了上行反射P波叠加成像的精度和保真度。
In order to effectively separate and extract up-going reflected P-wave in crosswell seismic data,a new method was presented. Firstly,the radial component R in the plane of the two wells was obtained by horizontally orientating and rotating the first arrival of X and Y component.Secondly,direct wave removal,tubing wave attenuation and upgoing wave separation were implemented on vertical Z component and radial R component.Thirdly,the direct wave tomography inversion result was used to build velocity model.Upgoing reflected P-wave tracing was carried out on the up-going wave field of vertical Z component and radial R component,and two corresponding AVA gathers were obtained.Finally,the separation and extraction of up-going reflected P-wave was proceeded in terms of its incident angle,the up-going reflected P-wave was stacked and imaged.Model computation and actual data processing results indicated that the method can effectively extract the up-going reflected P-wave in three-component data,which ensured the accuracy and fidelity of stack imaging of up-going reflected P-wave.
In order to effectively separate and extract up-going reflected P-wave in crosswell seismic data,a new method was presented. Firstly,the radial component R in the plane of the two wells was obtained by horizontally orientating and rotating the first arrival of X and Y component.Secondly,direct wave removal,tubing wave attenuation and upgoing wave separation were implemented on vertical Z component and radial R component.Thirdly,the direct wave tomography inversion result was used to build velocity model.Upgoing reflected P-wave tracing was carried out on the up-going wave field of vertical Z component and radial R component,and two corresponding AVA gathers were obtained.Finally,the separation and extraction of up-going reflected P-wave was proceeded in terms of its incident angle,the up-going reflected P-wave was stacked and imaged.Model computation and actual data processing results indicated that the method can effectively extract the up-going reflected P-wave in three-component data,which ensured the accuracy and fidelity of stack imaging of up-going reflected P-wave.
引文
[1]曹辉,郭全仕,唐金良,等.井间地震反射波资料处理[J].石油物探,2006,45(5):514-519
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[11]曹务祥,周安国.一种新的波场分离方法[J].石油物探,1997,36(4):104-109
[12]宋建国.井间地震资料数字处理方法流程研究[J].石油物探,1997,36(增刊):116-120
[13]姚忠瑞,何惺华,左建军,等.多方位Walk-away VSP处理方法[J].石油物探,2006,45(4):380-384
[14]张卫红,陈林,高志凌.垦71井区三维VSP资料波场分离方法应用研究[J].石油物探,2006,45(5): 532-536
[15]唐金良,曹辉,王立华,等.中值滤波在井间地震资料处理中的应用[J].石油物探,2005,44(1):47-50
[2]曾有良,乐友喜,单启铜,等.基于高分辨率Radon变换的VSP波场分离方法[J].石油物探,2007,46 (2):115-119
[3]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[J].石油地球物理勘探,2007,42 (3):256-258
[4]宋炜,王守东,王尚旭.井间地震资料克希霍夫积分法叠前深度偏移[J].石油物探,2004,43(6): 523-527
[5]左建军,林松辉,孔庆丰,等.井间地震技术在永新地区的应用[J].物探与化探,2009,33(5):557-561
[6]周建宇,何惺华,李安夏,等.罗家地区井间地震方法与效果[J].石油物探,2002,41(增刊):4-8
[7]陈世军,周建宇,王延光,等.井间地震技术在樊124井区的应用[J].石油物探,2003,42(3):369-373
[8]曹辉,唐金良,郭全仕,等.井间地震反射波场分离及应用研究[J].石油物探,2004,43(6):518-522
[9]郭全仕,邬达理,唐金良,等.井间地震反射波成像技术探讨[J].石油物探,2005,44(5):439-444
[10]孔庆丰,左建军,魏国华,等.井间地震资料处理方法研究与应用[J].物探与化探,2006,30(6):533-537
[11]曹务祥,周安国.一种新的波场分离方法[J].石油物探,1997,36(4):104-109
[12]宋建国.井间地震资料数字处理方法流程研究[J].石油物探,1997,36(增刊):116-120
[13]姚忠瑞,何惺华,左建军,等.多方位Walk-away VSP处理方法[J].石油物探,2006,45(4):380-384
[14]张卫红,陈林,高志凌.垦71井区三维VSP资料波场分离方法应用研究[J].石油物探,2006,45(5): 532-536
[15]唐金良,曹辉,王立华,等.中值滤波在井间地震资料处理中的应用[J].石油物探,2005,44(1):47-50
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