地震方位各向异性技术在TNB地区嘉二段储层裂缝检测中的应用
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摘要
低渗致密碳酸盐岩油气藏常与储层中裂缝的发育有着密切关系。在对岩心裂缝发育特征分析和叠前地震资料评价的基础上,本文利用叠前地震方位各向异性技术对TNB构造带嘉二段储层裂缝发育密度和方向进行了区域上的检测,分析了裂缝相对发育带的分布规律。研究表明,裂缝发育带在区域上呈现一定的分区性,既受TNB背斜带的宏观控制,又受后期叠加局部构造的影响。研究成果为下一步该地区的井位部署提供了参考依据,同时也展现了叠前地震方位各向异性技术在储层裂缝检测中的应用前景。
There is close relationship between dense carbonate reservoir with low permeability and development of fracture in the reservoir.On the basis of analyzing the feature of fractural development in the core and evaluation of prestack seismic data,the paper used prestack seismic azimuth anisotropic technique to detect regionally the fractural developing density and direction of Lower Triassic Jia-2 reservoir in TNB structural belt,analyzed the distributing rule of relative development zone of fracture.The studied results showed that the fractural developing belt is characterized by zoning regionally,both being macro controlled by TNB anticline and being affected by later stack local structures.The studied results provided referential foundation for next well-site deployment in the area,and proved the prospect of application of prestack seismic azimuth anisotropic technique to fractural detection of reservoir at the same time.
There is close relationship between dense carbonate reservoir with low permeability and development of fracture in the reservoir.On the basis of analyzing the feature of fractural development in the core and evaluation of prestack seismic data,the paper used prestack seismic azimuth anisotropic technique to detect regionally the fractural developing density and direction of Lower Triassic Jia-2 reservoir in TNB structural belt,analyzed the distributing rule of relative development zone of fracture.The studied results showed that the fractural developing belt is characterized by zoning regionally,both being macro controlled by TNB anticline and being affected by later stack local structures.The studied results provided referential foundation for next well-site deployment in the area,and proved the prospect of application of prestack seismic azimuth anisotropic technique to fractural detection of reservoir at the same time.
引文
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[2]季玉新.用地震资料检测裂缝性油气藏的方法.勘探地球物理进展,2002,25(5):28～35
[3]David G,Kim H.Fracture detection in Manderson Field:A3-D AVAZ case history.The Leading Edge,2000,19(11):1214～1221
[4]Fernando A et al.Fracture characterization of deep tight gas sands using azimuthal velocity and AVOseis-mic data in Saudi Arabia.The Leading Edge,2003,22(3):469～475
[5]Schoenberg M,Sayers D.Azimuth-dependent tuning of seismic waves reflected from fractured reservoirs.Geophysics,1999,64(4):1160～1171
[6]Mallick S,Craft K L,Meister LJ et al.Determination of the principal directions of azimuthal anisotropy from P-wave seismic data.Geoghysics,1998,63(2):692～706
[7]曲寿利,季玉新,王鑫等.全方位P波属性裂缝检测方法.石油地球物理勘探,2001,36(4):391～397
[8]Feng Shen,Sierra J et al.Azimuthal offset-dependent attributes applied to fracture detection in a carbonate reservoir.Geophysics,2002,67(2):355～364
[9]巫芙蓉,李亚林,王玉雪.储层裂缝发育带的地震综合预测.天然气工业,2006,26(11):49～51
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