AVO属性交会图解释技术在碳酸盐岩储层预测中的应用
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摘要
AVO属性交会图解释技术是通过正演模型提取AVO属性,再根据模型和实际地震数据在AVO属性交会 图上的分布关系,建立储层岩性参数、含流体特征与AVO属性间的对应关系。该法以模型正演分析为基础,以 地震数据AVO属性为外推控制条件,将地震、地质和测井信息紧密地结合起来,从而达到识别储层的目的。本 文以川东LJZ地区飞仙关鲕滩储层为例,通过对己知钻、测井资料分析和模型正演,确定鲕滩储层的地震属性 响应模式及其交会图上的分布特征,识别储层岩性和含流体性质,进而确定储层的气水界面。
AVO attributes crossplot interpretation technique is to detect AVO attributes by forward simulation of models and then build up corresponding relationship among lithologic parameters of reservoir, fluid property and AVO attributes according to distribution relation of models to real seismic data on AVO attributes crossplot. Taking the analysis of forward simulation of models as a basis and AVO attributes in seismic data as an extrapolating control condition,the method closely combines the seismic, geologic and logging information together so that can reach the goal of identifying reservoir. Taking the Feixianguan oolitic beach reservoir in LJZ area of the east part of Sichuan Province as an example and through the analysis of drilling and logging data and forward simulation of models,the paper determined the response mode of seismic attributes of oolitic beach reservoir and its distribution feature on crossplot,identified the lithology of reservoir and the fluid property and further determined the gas-water interface of reservoir.
AVO attributes crossplot interpretation technique is to detect AVO attributes by forward simulation of models and then build up corresponding relationship among lithologic parameters of reservoir, fluid property and AVO attributes according to distribution relation of models to real seismic data on AVO attributes crossplot. Taking the analysis of forward simulation of models as a basis and AVO attributes in seismic data as an extrapolating control condition,the method closely combines the seismic, geologic and logging information together so that can reach the goal of identifying reservoir. Taking the Feixianguan oolitic beach reservoir in LJZ area of the east part of Sichuan Province as an example and through the analysis of drilling and logging data and forward simulation of models,the paper determined the response mode of seismic attributes of oolitic beach reservoir and its distribution feature on crossplot,identified the lithology of reservoir and the fluid property and further determined the gas-water interface of reservoir.
引文
[1]孙鹏远,孙建国等．P-P波AVO近似对比研究:定性分 析．石油地球物理勘探,2002,37(增刊):164-171
[2]孙鹏远,孙建国等．P-P波AVO近似对比研究:定量分 析．石油地球物理勘探,2002,37(增刊):172-179
[3]殷八斤,曾灏等．AVO技术的理论与实践．北京:石油 工业出版社,1995
[4] Rutherford S , Williams R. Amplitude-versus-offset variations in gas sands. Geophysics, 1989, 54, 680-688
[2]孙鹏远,孙建国等．P-P波AVO近似对比研究:定量分 析．石油地球物理勘探,2002,37(增刊):172-179
[3]殷八斤,曾灏等．AVO技术的理论与实践．北京:石油 工业出版社,1995
[4] Rutherford S , Williams R. Amplitude-versus-offset variations in gas sands. Geophysics, 1989, 54, 680-688
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