井间地震资料处理技术研究
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摘要
由于避开了衰减严重的和非均质较强的近地表低降速带,井间地震可以得到高分辨率和高信噪比的原始地震资料。本文研究了井中管波的形成机理和衰减方法,探讨了直达波层析成像和VSP—CDP成像方法。据此对胜利罗家地区进行的实际资料处理得到了初步的井间速度层析和反射波成像。该成像结果能够帮助了解井间速度、地层以及储层的横向变化和展布,有助于研究井间的微构造和小断层。
The high resolution and high signal-noise ratio are be improved by seismic cross-hole method as avoiding greatly attenuated and more anisotropic near-surface weathered layer and subweathered zone. The forming mechanism and attenuation method of the tube-wave are studied, and the direct wave tomography and VSP-CDP imaging are discussed in this paper. So according to the methods, the primary cross-hole velocity tomography and reflection imaging were obtained after the data, which acquired from Luojia area , Shengli area, were processed. The results are of great advantage to understand the cross-hole velocity, the lateral variation and the through-going of the stratum and reservoirs and study the microstructures and faults between wells.
The high resolution and high signal-noise ratio are be improved by seismic cross-hole method as avoiding greatly attenuated and more anisotropic near-surface weathered layer and subweathered zone. The forming mechanism and attenuation method of the tube-wave are studied, and the direct wave tomography and VSP-CDP imaging are discussed in this paper. So according to the methods, the primary cross-hole velocity tomography and reflection imaging were obtained after the data, which acquired from Luojia area , Shengli area, were processed. The results are of great advantage to understand the cross-hole velocity, the lateral variation and the through-going of the stratum and reservoirs and study the microstructures and faults between wells.
引文
[1]何惺华,王玉玲.井间地震资料处理方法与效果.石油地球物理勘探,1997,31(1):81～89
[2]周建宇,梁周军.罗家地区井间地震方法与效果.石油地球物理勘探,2001,36(6):745～753
[3]G uustN olet.地震层析技术.北京:地质出版社,1991
[4]G T赫尔曼.层析成像和反演问题的基本方法.北京:石油工业出版社,1997
[5]Stew artR R.Exploration Seism ic Tom ography:Fundam entals.The Expanded A bstract of SEG61st A nnual International M eeting,1991
[2]周建宇,梁周军.罗家地区井间地震方法与效果.石油地球物理勘探,2001,36(6):745～753
[3]G uustN olet.地震层析技术.北京:地质出版社,1991
[4]G T赫尔曼.层析成像和反演问题的基本方法.北京:石油工业出版社,1997
[5]Stew artR R.Exploration Seism ic Tom ography:Fundam entals.The Expanded A bstract of SEG61st A nnual International M eeting,1991
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