基于地震属性的地震相分析思路
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摘要
重点阐述了基于地震属性的地震相分析方法。了解区域地质概况、沉积背景,选取完整的沉积体系;选取合适的时窗沿层提取地震属性(RMS,平均瞬时频率、有效带宽),利用RMS属性识别沉积体,平均瞬时频率判断物源方向,有效带宽推测沉积环境及地层的均质性;综合考虑最终确定沉积体的地震相特征,绘制该层段的地震相平面图;最后将地震相转相为沉积相。利用该方法对尼日尔三角洲S工区进行地震相分析,识别出高弯度水道、水道-朵叶复合体、末端朵叶等沉积体的典型地震相特征,取得很好的效果,显示该方法具有良好的应用前景。
In this paper,the seismic facies analysis method based on seismic attributes is mainly described.Firstly,the regional geological survey and sedimentary background are given.Then the method is introduced as this: the complete sedimentary system is selected and the seismic attributes(RMS,Average Instantaneous Frequency,Effective Bandwidth,etc)are extracted from the appropriate time-window along an event;the attribute of RMS amplitude is used to identify the sedimentary bodies;average instantaneous frequency is used to identify the sources direction;the effective bandwidth is used to predicate sedimentary environment condition and stratigraphic characteristics.So through the comprehensive considerations,the seismic facies feature of the sedimentary body is determined.The seismic facies plan is drawn.Finally,seismic facies are transformed into sedimentary facies.This method has been applied to analyzing seismic facies in S area of the Niger Delta.The typical characteristics of seismic facies of high-sinuosity channels,channel-lobes complex,terminal lobes and other sedimentary bodies are identified.The method achieved good results.
In this paper,the seismic facies analysis method based on seismic attributes is mainly described.Firstly,the regional geological survey and sedimentary background are given.Then the method is introduced as this: the complete sedimentary system is selected and the seismic attributes(RMS,Average Instantaneous Frequency,Effective Bandwidth,etc)are extracted from the appropriate time-window along an event;the attribute of RMS amplitude is used to identify the sedimentary bodies;average instantaneous frequency is used to identify the sources direction;the effective bandwidth is used to predicate sedimentary environment condition and stratigraphic characteristics.So through the comprehensive considerations,the seismic facies feature of the sedimentary body is determined.The seismic facies plan is drawn.Finally,seismic facies are transformed into sedimentary facies.This method has been applied to analyzing seismic facies in S area of the Niger Delta.The typical characteristics of seismic facies of high-sinuosity channels,channel-lobes complex,terminal lobes and other sedimentary bodies are identified.The method achieved good results.
引文
[1]邹文,陈爱萍,贺振华,等.基于S变换的地震相分析技术[J].石油物探,2006,45(1):48~51.
[2]陈方鸿,王树平,李志政.三维可视化地震相分析在沉积相研究中的应用[J].石油勘探与开发,2005,32(3):73~75.
[3]王英民.地震相分析讲座(三)[J].岩相古地理,1991(4):46~52.
[4]王晓平,陈波,藏殿光等.地震相分析技术在伊通地堑储层沉积特征分析中的应用[J].石油物探,2008,47(2):172~178.
[5]凌云研究组.基本地震属性在沉积环境解释中的应用研究[J].石油地球物理勘探,2003,38(6):642~653.
[6]林吉祥,施泽进,凌云,等.利用基本地震属性对目标层段的沉积演化解释研究[J].成都理工大学学报(自然科学版),2007,34(2):174~179.
[7]王世瑞,王树平,狄帮让,等.基于地震属性特征的河道砂体预测方法[J].石油地球物理勘探,2009,44(3):304~313.
[8]刘晨.浅谈地震相分析[J].石油地球物理勘探,1980(5):49~54.
[9]徐怀大.地震地层学解释[M].武汉:中国地质大学出版社,1990,121~134.
[10]李磊,王英民,黄志超,等.尼日尔三角洲深水区层序地层及地震相研究[J].沉积学报,2008,26(3):407~416.
[11]Octavian Catuneanu.Principles of Sequence Stratig-raphy[M].Amsterdam:Elsevier Science,2006.73~104.
[2]陈方鸿,王树平,李志政.三维可视化地震相分析在沉积相研究中的应用[J].石油勘探与开发,2005,32(3):73~75.
[3]王英民.地震相分析讲座(三)[J].岩相古地理,1991(4):46~52.
[4]王晓平,陈波,藏殿光等.地震相分析技术在伊通地堑储层沉积特征分析中的应用[J].石油物探,2008,47(2):172~178.
[5]凌云研究组.基本地震属性在沉积环境解释中的应用研究[J].石油地球物理勘探,2003,38(6):642~653.
[6]林吉祥,施泽进,凌云,等.利用基本地震属性对目标层段的沉积演化解释研究[J].成都理工大学学报(自然科学版),2007,34(2):174~179.
[7]王世瑞,王树平,狄帮让,等.基于地震属性特征的河道砂体预测方法[J].石油地球物理勘探,2009,44(3):304~313.
[8]刘晨.浅谈地震相分析[J].石油地球物理勘探,1980(5):49~54.
[9]徐怀大.地震地层学解释[M].武汉:中国地质大学出版社,1990,121~134.
[10]李磊,王英民,黄志超,等.尼日尔三角洲深水区层序地层及地震相研究[J].沉积学报,2008,26(3):407~416.
[11]Octavian Catuneanu.Principles of Sequence Stratig-raphy[M].Amsterdam:Elsevier Science,2006.73~104.
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