断陷湖盆陡坡带砂砾岩体构造恢复与内幕旋回划分——车镇凹陷北部陡坡带中浅层近岸扇体实例
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摘要
车镇凹陷北部陡坡带中浅层近岸扇体埋藏浅,储集性能好,勘探的关键问题是准确落实构造形态和识别有利盖层发育位置。本文通过对中浅层近岸扇体进行正演模拟,剖析了速度陷阱产生的原因,理清了地震反射与实际地层之间的定量对应关系;结合构造变速成图技术,完成了砂砾岩体构造的恢复;采用井震时频分析精细划分扇体内幕旋回,进一步明确了有利盖层的层序特征。应用此方法的结果表明:变速成图后构造圈闭更加落实,井震时频分析技术可有效指导砂砾岩体内幕旋回的划分,确定有利盖层发育位置。
The near-shore fans in the steep zone of north Chezhen Sag have the characteristics of shallow burial depth and excellent reservoir performance,the key factors which affect the exploration in this areas are confirmation of the structure shape and the recognition of location of the seal layer's development.By conducting forward modeling for the near-shore fans,the reason for generation of the velocity pitfall was analyzed,the quantitative corresponding relationship between seismic reflection and real strata were understood,by integrated with structure variable-velocity mapping technique,the recovery of the gravel bodies was completed,the inner cyclones inside the fans were classified by using well-seismic time-frequency analysis,so the sequence characteristics of the favorite seal layer were further understood.The application results of the technique show that the structure trap by variable-velocity mapping was further confirmed,well-seismic time-frequency analysis technique could effectively guide the classification of rubble body inner cyclones,and determine the location of the favorite seal layer's development.
The near-shore fans in the steep zone of north Chezhen Sag have the characteristics of shallow burial depth and excellent reservoir performance,the key factors which affect the exploration in this areas are confirmation of the structure shape and the recognition of location of the seal layer's development.By conducting forward modeling for the near-shore fans,the reason for generation of the velocity pitfall was analyzed,the quantitative corresponding relationship between seismic reflection and real strata were understood,by integrated with structure variable-velocity mapping technique,the recovery of the gravel bodies was completed,the inner cyclones inside the fans were classified by using well-seismic time-frequency analysis,so the sequence characteristics of the favorite seal layer were further understood.The application results of the technique show that the structure trap by variable-velocity mapping was further confirmed,well-seismic time-frequency analysis technique could effectively guide the classification of rubble body inner cyclones,and determine the location of the favorite seal layer's development.
引文
[1]张本琪,张洪山,康仁华等.车镇凹陷层序地层与石油地质.北京:石油工业出版社,2004
[2]Russell B.A si mple seismic i maging exercise.The Leading Edge,1998,19(7):885～889
[3]王树华,刘怀山,张云银等.变速成图方法及应用研究.中国海洋大学学报,2004,34(1):139～146
[4]郭广成,雷卫兵.变速成图方法在江陵凹陷构造解释中的应用.江汉石油职工大学学报,2007,20(6):3～6
[5]战春光,王学军,张家震等.应用变速成图技术解释富台油田砂砾岩体构造.石油勘探与开发,2003,30(05):75～76
[6]王永刚.地震资料综合解释方法.山东东营:中国石油大学出版社,2007,157～158
[7]石万忠,李举子,李梦溪等.时—频分析在高分辨率层序地层学中的应用.石油与天然气地质,2001,22(3):234～237
[8]李小梅,俞娟丽.时频分析技术在层序旋回划分中的应用.石油与天然气地质,2008,29(6):793～796
[9]陈钢花,余杰,张孝珍.基于小波时频分析的测井层序地层划分方法.新疆石油地质,2007,28(3):355
[10]李江涛,余继峰,李增学.基于测井数据小波变换的层序划分.煤田地质与勘探,2004,32(2):48～50
[11]余继峰,李增学.测井数据小波变换及其地质意义.中国矿业大学学报,2003,32(3):336～339
[12]李霞,范宜仁,邓少贵.Morlet小波在测井层序地层划分中的应用.勘探地球物理进展,2006,29(6):403
[2]Russell B.A si mple seismic i maging exercise.The Leading Edge,1998,19(7):885～889
[3]王树华,刘怀山,张云银等.变速成图方法及应用研究.中国海洋大学学报,2004,34(1):139～146
[4]郭广成,雷卫兵.变速成图方法在江陵凹陷构造解释中的应用.江汉石油职工大学学报,2007,20(6):3～6
[5]战春光,王学军,张家震等.应用变速成图技术解释富台油田砂砾岩体构造.石油勘探与开发,2003,30(05):75～76
[6]王永刚.地震资料综合解释方法.山东东营:中国石油大学出版社,2007,157～158
[7]石万忠,李举子,李梦溪等.时—频分析在高分辨率层序地层学中的应用.石油与天然气地质,2001,22(3):234～237
[8]李小梅,俞娟丽.时频分析技术在层序旋回划分中的应用.石油与天然气地质,2008,29(6):793～796
[9]陈钢花,余杰,张孝珍.基于小波时频分析的测井层序地层划分方法.新疆石油地质,2007,28(3):355
[10]李江涛,余继峰,李增学.基于测井数据小波变换的层序划分.煤田地质与勘探,2004,32(2):48～50
[11]余继峰,李增学.测井数据小波变换及其地质意义.中国矿业大学学报,2003,32(3):336～339
[12]李霞,范宜仁,邓少贵.Morlet小波在测井层序地层划分中的应用.勘探地球物理进展,2006,29(6):403
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