冀东滩海南堡2号构造复杂油气储层叠前地震描述技术及效果
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摘要
为了提高复杂油气区储层和流体预测的精度,本文针对冀东南堡凹陷滩海2号构造馆陶组—东一段复杂油气储层,以单块三维2ms海底电缆地震资料为基础,进行了OBC处理、叠前地震资料的三高处理、测井资料的岩石物理模拟、AVO正演、同时弹性参数反演等方面的一体化应用。确定了本区的岩性流体敏感弹性参数;证实了馆陶组底部玄武岩对下伏地层地震波传播的屏蔽作用,玄武岩顶面随着入射角的增加,其反射系数呈微弱降低的变化规律;主要含油储层的AVO特征;通过AVO正演与实际地震资料的分析,明确了主要目的层段东一段最大入射角为31°;经同时反演及对同时反演所得到的储层和流体敏感弹性参数的解释,落实了8个有利砂体的分布,并提供了两口钻探井位。
In order to improve the precision of reservoir and fluid prediction in complex oil/gas areas and in accordance with Ng-Ed1 complex oil/gas reservoir in No.2 structure of Nanpu sag in beach of eastern part of Hebei,based on a block of 3-D ocean-bottom cable seismic data with 2ms sampling,the paper carried out integrative application of OBC processing,"three-high" (high precision,high resolution and hi-fi) processing of prestack seismic data,rock physics simulation of logging data,AVO forward modeling and inversion of elastic parameters simultaneously,which determined elastic parameters sensitive to lithologic fluid in the region; proved the shielding action of basalt in Ed bottom on seismic wave propagation in underlying beds,the variation rule of reflection coefficient slightly decreasing with incident angles increasing on the top of basalt,and AVO feature of main oil-bearing reservoirs; clarified the max incident angle in main target strata eastern Ed1 is 31°by AVO forward simulation and analysis of practical seismic data; determined the distribution of 8 favorable sand bodies by simultaneous inversion and interpretation of inverted elastic parameters sensitive to reservoir and fluid and provided 2 drilling well sites.
In order to improve the precision of reservoir and fluid prediction in complex oil/gas areas and in accordance with Ng-Ed1 complex oil/gas reservoir in No.2 structure of Nanpu sag in beach of eastern part of Hebei,based on a block of 3-D ocean-bottom cable seismic data with 2ms sampling,the paper carried out integrative application of OBC processing,"three-high" (high precision,high resolution and hi-fi) processing of prestack seismic data,rock physics simulation of logging data,AVO forward modeling and inversion of elastic parameters simultaneously,which determined elastic parameters sensitive to lithologic fluid in the region; proved the shielding action of basalt in Ed bottom on seismic wave propagation in underlying beds,the variation rule of reflection coefficient slightly decreasing with incident angles increasing on the top of basalt,and AVO feature of main oil-bearing reservoirs; clarified the max incident angle in main target strata eastern Ed1 is 31°by AVO forward simulation and analysis of practical seismic data; determined the distribution of 8 favorable sand bodies by simultaneous inversion and interpretation of inverted elastic parameters sensitive to reservoir and fluid and provided 2 drilling well sites.
引文
[1]曹孟起等.OBC地震资料处理技术.石油地球物理勘探,2004,39(东部会议专刊):156～158
[2]全海燕等.海底电缆双检接收技术压制水柱混响.石油地球物理勘探,2005,40(1):7～12
[3]Dragoset B and Barr F J.Ocean-bottom cable dual-sensor scaling:Expanded Abstracts of SEG64th Annual Internat Mtg,1994,857～860
[4]Jiao Jianwu,Stewart Trickett and Brian Link.Ocean-bottom-cable dual-sensor summation:A robust ap-proach.Seismic Processing
[5]凌云研究组.叠前相对保持振幅、频率、相位和波形的地震资料处理与评价研究.石油地球物理勘探,2004,39(5):543～552
[6]Michael batzle&Wang Zhijing.Seismic properties of prore fluids.Geophysics,1992,57(11):1396～1408
[7]Amos MNur,Gary Mavko,Jack Dvorkin et al.Crit-ical porosity:The key to relating physical properties to porosityin rocks.The Leading Edge,1998(5):357～362
[8]Robert G Kand Xu Shiyu.An approxi mation for the Xu-White velocity model.Geophysics,2002,67(5):1406～1414
[9]Han De-hua and Batzle M L.Gassmann's equation and fluid-saturation effects on seismic velocities.Geo-physics,2004,69(2):398～405
[10]Mavko G,Mukerji Tand Dvorkin J.The Rock Phys-ics Handbook.Cambridge Univ press,1998
[11]王元君,冉建斌等.基于测井资料岩石物理模拟的储层识别方法.石油地球物理勘探,2006,41(6):644～650
[12]Patrick Connolly.Elastic i mpedance.The Leading Edge,April1999:438～452
[13]Nivlet P et al.Pre-stack stratigraphic inversion in a deep offshore turbiditic environment.Expanded Ab-stracts of SEG75th Annual Internat Mtg,2005
[14]Ron Mc Whorter et al.Quantifying reservoir proper-ties of the East Texas Woodbin through rock physics and multiattri-bute seismic inversion.Expanded Ab-stracts of SEG75th Annual Internat Mtg,2005
[15]冉建斌等.基于部分角道集叠加的地震资料弹性参数反演方法及效果.物探科技通讯,2006(2):44～48
[2]全海燕等.海底电缆双检接收技术压制水柱混响.石油地球物理勘探,2005,40(1):7～12
[3]Dragoset B and Barr F J.Ocean-bottom cable dual-sensor scaling:Expanded Abstracts of SEG64th Annual Internat Mtg,1994,857～860
[4]Jiao Jianwu,Stewart Trickett and Brian Link.Ocean-bottom-cable dual-sensor summation:A robust ap-proach.Seismic Processing
[5]凌云研究组.叠前相对保持振幅、频率、相位和波形的地震资料处理与评价研究.石油地球物理勘探,2004,39(5):543～552
[6]Michael batzle&Wang Zhijing.Seismic properties of prore fluids.Geophysics,1992,57(11):1396～1408
[7]Amos MNur,Gary Mavko,Jack Dvorkin et al.Crit-ical porosity:The key to relating physical properties to porosityin rocks.The Leading Edge,1998(5):357～362
[8]Robert G Kand Xu Shiyu.An approxi mation for the Xu-White velocity model.Geophysics,2002,67(5):1406～1414
[9]Han De-hua and Batzle M L.Gassmann's equation and fluid-saturation effects on seismic velocities.Geo-physics,2004,69(2):398～405
[10]Mavko G,Mukerji Tand Dvorkin J.The Rock Phys-ics Handbook.Cambridge Univ press,1998
[11]王元君,冉建斌等.基于测井资料岩石物理模拟的储层识别方法.石油地球物理勘探,2006,41(6):644～650
[12]Patrick Connolly.Elastic i mpedance.The Leading Edge,April1999:438～452
[13]Nivlet P et al.Pre-stack stratigraphic inversion in a deep offshore turbiditic environment.Expanded Ab-stracts of SEG75th Annual Internat Mtg,2005
[14]Ron Mc Whorter et al.Quantifying reservoir proper-ties of the East Texas Woodbin through rock physics and multiattri-bute seismic inversion.Expanded Ab-stracts of SEG75th Annual Internat Mtg,2005
[15]冉建斌等.基于部分角道集叠加的地震资料弹性参数反演方法及效果.物探科技通讯,2006(2):44～48
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