鄂尔多斯盆地陕北斜坡延长区块储层流体识别
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摘要
延长油田区块位于鄂尔多斯盆地陕北斜坡东部延安单斜的中间部位,为研究天然气储层及储层中高含气分布区,2008年在延长油田区块内完成三维地震勘探344km2。本文对三维地震资料应用吸收系数、频谱分解、振幅衰减等地震属性进行流体识别试验。试验结果表明振幅衰减对含气层段异常响应相对敏感,吸收系数对高含气层段有一定反映。利用天然气储层各层段振幅衰减极大值,参考吸收系数剖面的高值层段,分析预测了三维区块含气概率高的平面分布区,2009年在预测的含气概率高分布区进行了探井验证,取得了比较理想的效果。
Yanchang block is located in the middle of Yanan single slope in eastern Shanbei slope,Ordos Basin.For researching the gas reservoir and gas-rich area in reservoir layers,344 km2 3D seismic exploration have been completed in this area in 2008.In this paper,some fluid identification tests including seismic wave absorption coefficient study,seismic profile spectrum decomposition technique and seismic amplitude attenuation attribute have been made.The results of these tests indicate that seismic amplitude attenuation is sensitive for gas-bearing reservoirs and absorption coefficient is also sensitive only for gas-rich layers.Some high probability distribution zones of gas-rich have been analyzed and predicted by using the maximum value of seismic amplitude attenuation and referencing absorption coefficient profile.Several exploration bore holes were conducted at the zones for verifying predicted results,which produced a good conclusion in 2009.
Yanchang block is located in the middle of Yanan single slope in eastern Shanbei slope,Ordos Basin.For researching the gas reservoir and gas-rich area in reservoir layers,344 km2 3D seismic exploration have been completed in this area in 2008.In this paper,some fluid identification tests including seismic wave absorption coefficient study,seismic profile spectrum decomposition technique and seismic amplitude attenuation attribute have been made.The results of these tests indicate that seismic amplitude attenuation is sensitive for gas-bearing reservoirs and absorption coefficient is also sensitive only for gas-rich layers.Some high probability distribution zones of gas-rich have been analyzed and predicted by using the maximum value of seismic amplitude attenuation and referencing absorption coefficient profile.Several exploration bore holes were conducted at the zones for verifying predicted results,which produced a good conclusion in 2009.
引文
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[8]王西文.岩性油气藏的储层预测及评价技术研究[J].石油物探,2004,43(6):511～517.
[9]Russell B H,Hedlin K,Hilterman F J,et al.Fluid property discrimination with AVO:A Biot Gassmann per-spective[J].Geophysics,2003,68(1):29～39.
[10]宁忠华,贺振华,黄德济.基于地震资料的高灵敏度流体识别因子[J].石油物探,2006,45(3):239～241.
[2]翟爱军,邓宏文等.鄂尔多斯盆地上古生界层序地层与储层预测[J].石油与天然气地质,1999(04):336～340.
[3]汪正江,许效松.鄂尔多斯盆地下古生界储层气气源探讨[J].沉积与特提斯地质2003(23)84～90
[4]付金华,魏新善,任军峰等.鄂尔多斯盆地天然气勘探形势与发展前景[J].石油学报2006(6):1～4
[5]高建虎,雍学善,刘洪.叠后地震油气检测技术与应用[J].石油物探,2006,45(4):385～389.
[6]杨占龙,彭立才,陈启林,等.地震属性分析与岩性油气藏勘探[J].石油物探,2007,46(2):131～136.
[7]马中高,伍向阳.石油流体弹性参数的实验研究[J].石油物探,2007,46(1):94～99.
[8]王西文.岩性油气藏的储层预测及评价技术研究[J].石油物探,2004,43(6):511～517.
[9]Russell B H,Hedlin K,Hilterman F J,et al.Fluid property discrimination with AVO:A Biot Gassmann per-spective[J].Geophysics,2003,68(1):29～39.
[10]宁忠华,贺振华,黄德济.基于地震资料的高灵敏度流体识别因子[J].石油物探,2006,45(3):239～241.
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