岩性油藏地震资料弱反射特征分析
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摘要
由于岩性油藏通常以较为复杂的地层组合形式出现,因此在砂泥岩互层分界面上的地震反射波都表现为相对较弱的振幅特征,而且在地震剖面上识别相应的弱反射较为困难。本文通过对砂体模型反射系数的计算和不同量级反射系数合成地震记录的分析,以及大量井震资料的统计分析,进行了岩性油藏地震弱反射信号划分与弱反射岩性油藏分类。依据分类结果可为进一步开展岩性油藏的精细描述、储层预测提供基础资料和实践指导。
Lithological reservoir usually appears in a form of complex formation combination,and seismic reflections on interfaces between sandstone and mudstone are relatively weak.So it is difficult to identify these interfaces on seismic sections.Based on calculations of sand model reflection coefficients,analysis of synthetic seismogram with different magnitude,and statistical analysis of well and seismic data,we classify seismic weak reflections on lithological reservoirs.The classification can provide basic data and practical guidance for further reservoir prediction and characterization.
Lithological reservoir usually appears in a form of complex formation combination,and seismic reflections on interfaces between sandstone and mudstone are relatively weak.So it is difficult to identify these interfaces on seismic sections.Based on calculations of sand model reflection coefficients,analysis of synthetic seismogram with different magnitude,and statistical analysis of well and seismic data,we classify seismic weak reflections on lithological reservoirs.The classification can provide basic data and practical guidance for further reservoir prediction and characterization.
引文
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[8]季玉新,韩文功,沈财余等.胜利油田典型地质模型的地震正演.石油地球物理勘探,2006,41(5):561～Ji Yuxin,Han Wengong,Shen Caiyu et al.Seismicmodeling of the typical geological model of Shenglioilfield.OGP,2006,41(5):56～62
[9]刘光鼎,张丽莉,祝靓谊.试论复杂地质体的油气地震勘探.地球物理学进展,2006,21(3):683～686Liu Guangding,Zhang Lili,Zhu Liangyi.Seismicprospecting for oil and gas on the complex geologicalbodies.Progress in Geophysics,2006,21(3):683～686
[10]陈宗清.川南地区地震反射波强弱与二、三叠系气藏气水分布关系.石油与天然气地质,1994,15(1):12～22Chen Zongqing.Relationship between seismic reflec-tion strength and gas-water distribution of Permianand Triassic gas pools in south Sichuan.Oil&GasGeology,1994,15(1):12～22
[11]夏竹,刘兰锋,任敦占等.基于地震道时频分析的地层结构解析原理和方法.石油地球物理勘探,2007,42(1):57～65Xia Zhu,Liu Lanfeng,Ren Dunzhan et al.The theo-ry and method of stratum architecture reconstructingbased on time-frequency analysis of seismic trace.OGP,2007,42(1):57～65
[12]李可恩,贺振华,黄德济.高速屏蔽层下弱反射界面的PS转换波勘探.油气地球物理,2007,5(2):21～24Li keen,He Zhenhua,Huang Deji.PS convertedwave exploration of weak reflection interface underhigh velocity screened bed.Petroleum Geophysics,2007,5(2):21～24
[13]Zeng Hongliu.How thin is a thin bed?An alternativeperspective.The Leading Edge,2009,28(10):1192～1197
[14]Jyoti Behura,Ilya Tsvankin.Estimation of intervalanisotropic attenuation from reflection data.Geo-physics,2009,74(6):69～74
[15]杜世通.地震技术识别与描述超薄层储层的潜力与局限.石油地球物理勘探,2005,40(6):652～662Du Shitong.Potential and limitation of identifyingand describing ultra-thin reservoir by seismic techno-logy.OGP,2005,40(6):652～662
[16]Rick Box,Eric Doss.Typical AVO response as afunction of depth and fluid pressure gradient:Gulf ofMexico shelf.The Leading Edge,2008,27(10):1252～1262
[2]师永民.高分辨率砂泥岩薄互层储层综合预测技术.石油地球物理勘探,2000,35(5):661～668Shi Yongmin.High-resolution reservoir integratedpredicting technique for thin sand-shale interbedding.OGP,2000,35(5):661～668
[3]王永刚,杨国权.砂砾岩油藏的地球物理特征.石油大学学报(自然科学版),2001,25(5):16～20Wang Yonggang,Yang Guoquan.Analysis on geo-physical characteristics of glutenite reservoir.Journalof the University of Petroleum(Edition of NaturalScience),2001,25(5):16～20
[4]王永刚,乐友喜,曹丹平等.河道砂体含油性判别方法.石油地球物理勘探,2005,40(4):459～462Wang Yonggang,Yue Youxi,Cao Danping et al.Method of identifying oil-bearing ability in channelsand body.OGP,2005,40(4):459～462
[5]张军华,杨国权,王永刚等.河流相储集体的精细解释与描述.石油地球物理勘探,2005,40(3):314～317Zhang Junhua,Yang Guoquan,Wang Yonggang etal.Seismic finer interpretation and description for thefluvial face reservoir.OGP,2005,40(3):314～317
[6]李健,刘特阶,戴民等.辽河油田薄层砂体的预测与追踪.地球物理学进展,2010,25(1):56～62Li Jian,Liu Tejie,Dai Min et al.Predicting andtracing of the thin sand bodies in Liaohe oilfield.Progress in Geophysics,2010,25(1):56～62
[7]曹国滨,李云伟,崔汝国.济阳坳陷岩性油气藏地震采集技术.中国石油大学学报(自然科学版),2007,31(3):39～42Cao Guobin,Li Yunwei,Cui Ruguo.Seismic acqui-sition techniques of lithologic reservoirs in Jiyang de-pression.Journal of China University of Petroleum(Edition of Natural Science),2007,31(3):39～42
[8]季玉新,韩文功,沈财余等.胜利油田典型地质模型的地震正演.石油地球物理勘探,2006,41(5):561～Ji Yuxin,Han Wengong,Shen Caiyu et al.Seismicmodeling of the typical geological model of Shenglioilfield.OGP,2006,41(5):56～62
[9]刘光鼎,张丽莉,祝靓谊.试论复杂地质体的油气地震勘探.地球物理学进展,2006,21(3):683～686Liu Guangding,Zhang Lili,Zhu Liangyi.Seismicprospecting for oil and gas on the complex geologicalbodies.Progress in Geophysics,2006,21(3):683～686
[10]陈宗清.川南地区地震反射波强弱与二、三叠系气藏气水分布关系.石油与天然气地质,1994,15(1):12～22Chen Zongqing.Relationship between seismic reflec-tion strength and gas-water distribution of Permianand Triassic gas pools in south Sichuan.Oil&GasGeology,1994,15(1):12～22
[11]夏竹,刘兰锋,任敦占等.基于地震道时频分析的地层结构解析原理和方法.石油地球物理勘探,2007,42(1):57～65Xia Zhu,Liu Lanfeng,Ren Dunzhan et al.The theo-ry and method of stratum architecture reconstructingbased on time-frequency analysis of seismic trace.OGP,2007,42(1):57～65
[12]李可恩,贺振华,黄德济.高速屏蔽层下弱反射界面的PS转换波勘探.油气地球物理,2007,5(2):21～24Li keen,He Zhenhua,Huang Deji.PS convertedwave exploration of weak reflection interface underhigh velocity screened bed.Petroleum Geophysics,2007,5(2):21～24
[13]Zeng Hongliu.How thin is a thin bed?An alternativeperspective.The Leading Edge,2009,28(10):1192～1197
[14]Jyoti Behura,Ilya Tsvankin.Estimation of intervalanisotropic attenuation from reflection data.Geo-physics,2009,74(6):69～74
[15]杜世通.地震技术识别与描述超薄层储层的潜力与局限.石油地球物理勘探,2005,40(6):652～662Du Shitong.Potential and limitation of identifyingand describing ultra-thin reservoir by seismic techno-logy.OGP,2005,40(6):652～662
[16]Rick Box,Eric Doss.Typical AVO response as afunction of depth and fluid pressure gradient:Gulf ofMexico shelf.The Leading Edge,2008,27(10):1252～1262
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