转换波叠前横波速度反演
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摘要
地震波速度对地震资料偏移成像、岩性和岩相解释以及储层预测,均起着非常重要的作用.在储层预测中,需要获得横波层速度信息,以减少仅用纵波速度在区分岩性和孔隙中流体类型以及含气饱和度方面的不确定性.基于Zoeppritz方程组,提出了数值求解和速度扫描方法,对叠前转换波资料求取横波层速度.理论模型和实际转换波资料的反演结果,均表明该方法的效果较好.
Seismic velocity is important to migration of seismic data, interpretation of lithology and lithofacies as well as prediction of reservoir. The information of shear wave velocity is required to reduce the uncertainty for discriminating lithology, identifying fluid type in porous material and calculating gas saturation in reservoir prediction. Based on Zoeppritz equations, a numeral and scanning method was proposed in this paper. Shear wave velocity can be calculated with prestack converted wave data. The effects were demonstrated by inversion of theoretical and real seismic data.
Seismic velocity is important to migration of seismic data, interpretation of lithology and lithofacies as well as prediction of reservoir. The information of shear wave velocity is required to reduce the uncertainty for discriminating lithology, identifying fluid type in porous material and calculating gas saturation in reservoir prediction. Based on Zoeppritz equations, a numeral and scanning method was proposed in this paper. Shear wave velocity can be calculated with prestack converted wave data. The effects were demonstrated by inversion of theoretical and real seismic data.
引文
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甘永忠.1995.用P-SV波叠加剖面合成横波层速度剖面[J].石油地球物理勘探,30(1):56-61.
贺振华,黄德济,王成祥,等.1996.多波层位识别与薄层解释新方法[J].成都理工学院学报,23(3):1-17.
黄德济,贺振华,赵宪生,等.1996.多波层位对比原则与方法[J].物探化探计算技术,18(3):194-205.
陆基孟.1993.地震勘探原理(上册)[M].北京:石油大学出版社:119-120.
马劲风,贾春环,李庆春,等.1999.转换波人工合成记录与速度反演方法研究[J].石油地球物理勘探,34(5):509-519.
孟宪军,姜秀娣,黄捍东,等.2004.叠前AVA广义非线性纵、横波速度反演[J].石油地球物理勘探,39(6):645-650.
任义庆,徐仲达,马在田,等.1996.应用模拟退火法反演横波速度[J].石油地球物理勘探,31(5):677-684.
沈凤,钱绍新,刘雯林,等.1994.AVO多参数反演在气层检测和储层定量研究中的应用[J].石油学报,15(2):11-20.
唐建明.2002.AVO纵横波反演[J].物探化探计算技术,24(1):27-30.
张玉芬,刘春化.1997.多参数约束反演及其应用[J].地球科学中国地质大学学报,22(2):119-222.
张玉芬.1998a.测井资料约束的层速度反演[J].石油与天然气地质,19(3):227-231.
张玉芬.1998b.求取波阻抗初值的一种新方法:井约束波阻抗扫描法[J].物探与化探,22(5):354-359.
郑晓东.1992.AVO理论和方法的一些新进展[J].石油地球物理勘探,27(3):305-317.
钟森.1995.AVO反演纵、横波速度[J].石油地球物理勘探,30(3):373-378.
Aki KI,Richards P G.1980.Quantitative Seismology[M].W HFreeman and Co:Combridge Press:144-154.
Antonio C B R,John P C.2001.Castagna.Useful approxi mations for converted-wave AVO[J].Geophysics,66(6):1721-1734.
Gray D.2002.P-S converted-wave AVO[C/OL]∥73th Ann Internat MtgL Soc of Expl Geophys:165-168.http://www.cseg.ca/conferences/2003/2003abstracts/225s0130.pdf
Rothman D H.1986.Automatic exti mation of a large residual statics correction[J].Gheophysics,51(2):332-334.
Stewart R R,Ferguson RJ.1996.Shear-wave interval velocity from P-S stacking velocitys[J].Canadian Journal ofExploration Geophysics,32(2):139-142.
Vant A,Brown RJ.2001.Approxi mating the P-S reflection coefficient for small incidence angles[R/OL].CREWS Re-search Report-Volume13:157-179[2006-03-05].http://www.crewes.org/Reports/2001/2001-13.pdf
甘永忠.1995.用P-SV波叠加剖面合成横波层速度剖面[J].石油地球物理勘探,30(1):56-61.
贺振华,黄德济,王成祥,等.1996.多波层位识别与薄层解释新方法[J].成都理工学院学报,23(3):1-17.
黄德济,贺振华,赵宪生,等.1996.多波层位对比原则与方法[J].物探化探计算技术,18(3):194-205.
陆基孟.1993.地震勘探原理(上册)[M].北京:石油大学出版社:119-120.
马劲风,贾春环,李庆春,等.1999.转换波人工合成记录与速度反演方法研究[J].石油地球物理勘探,34(5):509-519.
孟宪军,姜秀娣,黄捍东,等.2004.叠前AVA广义非线性纵、横波速度反演[J].石油地球物理勘探,39(6):645-650.
任义庆,徐仲达,马在田,等.1996.应用模拟退火法反演横波速度[J].石油地球物理勘探,31(5):677-684.
沈凤,钱绍新,刘雯林,等.1994.AVO多参数反演在气层检测和储层定量研究中的应用[J].石油学报,15(2):11-20.
唐建明.2002.AVO纵横波反演[J].物探化探计算技术,24(1):27-30.
张玉芬,刘春化.1997.多参数约束反演及其应用[J].地球科学中国地质大学学报,22(2):119-222.
张玉芬.1998a.测井资料约束的层速度反演[J].石油与天然气地质,19(3):227-231.
张玉芬.1998b.求取波阻抗初值的一种新方法:井约束波阻抗扫描法[J].物探与化探,22(5):354-359.
郑晓东.1992.AVO理论和方法的一些新进展[J].石油地球物理勘探,27(3):305-317.
钟森.1995.AVO反演纵、横波速度[J].石油地球物理勘探,30(3):373-378.
Aki KI,Richards P G.1980.Quantitative Seismology[M].W HFreeman and Co:Combridge Press:144-154.
Antonio C B R,John P C.2001.Castagna.Useful approxi mations for converted-wave AVO[J].Geophysics,66(6):1721-1734.
Gray D.2002.P-S converted-wave AVO[C/OL]∥73th Ann Internat MtgL Soc of Expl Geophys:165-168.http://www.cseg.ca/conferences/2003/2003abstracts/225s0130.pdf
Rothman D H.1986.Automatic exti mation of a large residual statics correction[J].Gheophysics,51(2):332-334.
Stewart R R,Ferguson RJ.1996.Shear-wave interval velocity from P-S stacking velocitys[J].Canadian Journal ofExploration Geophysics,32(2):139-142.
Vant A,Brown RJ.2001.Approxi mating the P-S reflection coefficient for small incidence angles[R/OL].CREWS Re-search Report-Volume13:157-179[2006-03-05].http://www.crewes.org/Reports/2001/2001-13.pdf
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