基于反假频基函数的井震匹配快速算法
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摘要
河流相储层、碳酸盐岩孔缝洞密集带等地层,地震同相轴不具有层状特征,可形象地称为具有复杂网状特征,利用层状地层模型难以精细描述井外地层.传统的宽带约束反演,其目标函数一般含有一个层状的初始模型、离散光滑约束、稀疏约束和线性拟合函数约束.利用这种层状的初始模型进行井震匹配,其高频信息主要来源于井资料插值得到的层状地层模型,井之间地震信息很难起作用.不仅如此,其计算量较大,且不易调节层状信息与稀疏约束反映的地震资料中的非层状信息的比例,难以适应的复杂网状地层的井震信息融合.本文利用地震资料构造反假频基函数以描述复杂网状地层,避免了对层状模型的过分依赖,使得联合重建的信息在井旁与测井资料拟合较好,在井外能充分地反映地震资料所含非层状信息.本文利用大庆下白垩地层扶余油层的河流相资料进行实验,证实了方法的快速和有效性.
The seismic event has non-layered structure in fluvial faces reservoir and carbonate rock,we call this structure as complicated network structure.It's difficult to depict this type structure precisely using layered strata model.The objective function of the broad-band restrained inversion generally includes a layered initial model, discrete smoothing restrain,sparse restrain and linear-analog function,the high frequency information of this method dominantly derives from the layered initial model which is generated by interpolate between wells,the information of the seismic data between the wells has little effect on the merging.Besides,its computation is time-consuming,and it's difficult to adjust layered information and non-layered information of sparse-restrained seismic data,so it isn't fit for well-logging and seismic information mergence of strata with complicate feature.This paper use seismic data to generate anti-alias base functions to depict the complicated network strata,it avoid relying on the layered model and can reflect the non-layered information of the seismic data.This paper test the method using seismic data of the Lower Cretaceous Fuyu oil layer,approves that the method is fast and efficient.
The seismic event has non-layered structure in fluvial faces reservoir and carbonate rock,we call this structure as complicated network structure.It's difficult to depict this type structure precisely using layered strata model.The objective function of the broad-band restrained inversion generally includes a layered initial model, discrete smoothing restrain,sparse restrain and linear-analog function,the high frequency information of this method dominantly derives from the layered initial model which is generated by interpolate between wells,the information of the seismic data between the wells has little effect on the merging.Besides,its computation is time-consuming,and it's difficult to adjust layered information and non-layered information of sparse-restrained seismic data,so it isn't fit for well-logging and seismic information mergence of strata with complicate feature.This paper use seismic data to generate anti-alias base functions to depict the complicated network strata,it avoid relying on the layered model and can reflect the non-layered information of the seismic data.This paper test the method using seismic data of the Lower Cretaceous Fuyu oil layer,approves that the method is fast and efficient.
引文
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[13] Claerbout.Fundamentals of Geophysical Data Processing[M].1976．
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[3] 杨谦,李正文.地震资料宽带约束反演方法及应用[J].石油物探,1996,35(4) :37-42． Yang Q,Li Z W.Broadband constrained inversion of data and its application[J].GPP,1996,35(4) :37-42．
[4] 杜世通.地震层序模型与地震资料高分辨率处理[J].勘探家,1998,3(3) :17-23． Du S T.Seismic sequence model and seismic data highresolution processing[J].China Petroleum Exploration,1998,3(3) :17-23．
[5] Paul WB,et al.Turbidite systems,Part 1:Sequence and seismic stratigraphy[J].The Leading Edge,1999,4:454-463．
[6] 张琴,曹思远,等.地震资料的精细目标处理在层序地层学研究中的应用[J].石油实验地质,2002,24(5) :464-473． Zhang Q,Can S Y,et al.Application of the subtle object processing of seismic data to sequence stratigraphy[J].Experimental Petroleum Geology,2002,24(5) :464-473．
[7] 赵淑红,朱光明.相位在地震勘探中的用途及研究[J].地球科学与环境学报,2005,27(4) :87-89． Zhao S H,Zhu G M.Application and research of phase in seismic prospecting[J].Journal of Earth Science and Environmental,2005 ,27 (4) :87-89．
[8] 孟宪军,杜世通.地震资料的测井约束多项式拟合外推反演[J].石油地球物理勘探,1995,30(3) :363-372．
Meng X J,Du S T.Log-constrained polynomial fitting extrapolation inversion of seismic data[J].OGP,1995,30(3) :363-372
[9] 张玉芬,凌峰,等.井约束地震道反演和多项式拟合的联合应用[J].石油与天然气地质,2001,22(4) :388-390． Zhang Y F,Ling F,etal .Application of well log constrained seismic trace inversion combined with polynomial fitting[J].Oil&Gas Geology,2001,22(4) :388-390．
[10] Sacchi M D.Statistical and transform methods for seismic signal processing[M].2002．
[11] 杨培杰,印兴耀.非线性二次规划贝叶斯叠前反演[J].地球物理学报,2008,51(6) :1876-1882． Yang P J,Yin X Y.Non-linear quadratic programming Bayesian prestack inversion[J].Chinese Journal of Geophysics,2008,51(6) :1876-1882．
[12] 曾锐,刘洪,等.基于自动增益控制调制法的高频重建技术[J].地球物理学进展,2007,22(3) :850-859． Zeng R,Liu H,et al.High frequency reconstruction technique based on auto gain control modulation[J].Progress in Geophysics,2007,22(3) :850-859．
[13] Claerbout.Fundamentals of Geophysical Data Processing[M].1976．
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