富含油储层地震响应特征分析
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摘要
针对油层与水层的地震响应特征较为接近,常规的流体检测手段预测油层效果不理想的问题,通过测井、地质、地球物理的综合研究以及理论模型和实际资料的统计分析,由振幅和甜点属性的相对变化量对富含油储层的地震响应特征进行分析,并定量地总结了规律。研究结果表明:当油层厚度较小时,振幅和甜点的相对变化量也较小,且与油层厚度没有明显关系;随着油层厚度的增大,振幅相对变化量线性增大,甜点相对变化量指数增大,增大的速度更快。甜点属性能够放大油层和水层之间的差异。
The seismic response characteristics of oil layer and water layer are close,and conventional fluid prediction methods cannot get satisfactory result for oil layer prediction.Through integrated study of well logging,geology and geophysics,and statistical analysis of theoretical model and field data,the seismic response characteristic of oil-rich reservoir was analyzed from the point of the relative variations of amplitude and sweetness,and its regularity was summarized quantitatively.The results show that when the thickness of oil layer is small,the relative variations of amplitude and sweetness are small too,and they have no obvious relationship with the thickness of oil layer.With the thickness of oil layer increasing,the relative variation of amplitude increases linearly,and that of sweetness increases exponentially with higher rate.Sweetness can amplify the difference between oil layer and water layer.
The seismic response characteristics of oil layer and water layer are close,and conventional fluid prediction methods cannot get satisfactory result for oil layer prediction.Through integrated study of well logging,geology and geophysics,and statistical analysis of theoretical model and field data,the seismic response characteristic of oil-rich reservoir was analyzed from the point of the relative variations of amplitude and sweetness,and its regularity was summarized quantitatively.The results show that when the thickness of oil layer is small,the relative variations of amplitude and sweetness are small too,and they have no obvious relationship with the thickness of oil layer.With the thickness of oil layer increasing,the relative variation of amplitude increases linearly,and that of sweetness increases exponentially with higher rate.Sweetness can amplify the difference between oil layer and water layer.
引文
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[2]黄捍东,张如伟,李进波,等.基于叠前振幅随角度变化反演的储层流体识别方法[J].中国石油大学学报:自然科学版,2009,33(5):41-45.
[3]周义军,李喜瑞.敏感角度弹性阻抗在流体预测中的应用[J].石油地球物理勘探,2010,45(5):710-713.
[4]李爱山,印兴耀,张繁昌,等.叠前AVA多参数同步反演技术在含气储层预测中的应用[J].石油物探,2007,46(1):64-68.
[5]谢玉洪,王振峰,周家雄,等.多角度同步反演在南海西部气田开发中的应用[J].石油天然气学报,2006,28(1):37-41.
[6]Avseth P,Mukerji T,Mavko G.Quantitative Seismic Interpreta-tion[M].Cambridge:Cambridge University Press,2005:1-50.
[7]杨春峰,段洪有,廖刃,等.基于正演分析的高阻抗地层下多次波压制技术[J].现代地质,2009,23(2):326-332.
[8]李勇根,徐胜峰.地震岩石物理和正演模拟技术在致密砂岩储层预测中的应用研究[J].石油天然气学报,2008,30(6):61-65.
[9]姜岩,李文艳,叶萍.基于正演模拟的地震反射特征主要影响因素分析[J].大庆石油地质与开发,2006,25(5):100-102.
[10]张永刚.地震波场数值模拟方法[J].石油物探,2003,42(2):143-148.
[11]魏艳,尹成,丁峰,等.地震多属性综合分析的应用研究[J].石油物探,2007,46(1):42-47.
[12]刘企英.利用地震信息进行油气预测[M].北京:石油工业出版社,1994:1-50.
[13]胡烨,曾佐勋,潘良云,等.酒泉盆地南缘老君庙构造带应力场数值模拟[J].现代地质,2009,23(3):423-429.
[14]兰晓雯,晏信飞,吴何珍,等.隐伏活断层地震勘探正演模拟方法[J].现代地质,2009,23(6):1160-1166.
[15]张军舵,乐友喜,王艳香.双相各向同性介质伪谱法地震波场数值模拟[J].石油物探,2008,47(4):338-345.
[16]Radovich B J,Oliveros R B.3-D sequence interpretation of seis-mic instantaneous attributes from the Gorgon field[J].TheLeading Edge,1998,17(9):1286-1293.
[17]Hart B S.Stratigraphically significant attributes[J].The Lead-ing Edge,2008,27(3):320-324.
[18]Hart B S.Channel detection in 3-D seismic data using sweetness[J].AAPG Bulletin,2008,92(6):733-742.
[19]刘曾勤,王英民,白广臣,等.甜点及其融合属性在深水储层研究中的应用[J].石油地球物理勘探,2010,45(增刊):158-162.
[20]陆基孟,王永刚.地震勘探原理[M].第3版.东营:石油大学出版社,2009:1-50.
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