复杂山地三维地震资料目标处理的关键技术——以大湾构造为例
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摘要
复杂山地地形变化剧烈,低降速带变化大,是目前地震目标处理亟须解决的问题。普光气田大湾构造的勘探实践表明,复杂山地三维地震资料目标处理的关键问题为:静校正;噪音压制;能量、频率的一致性;速度的精确拾取;波场复杂。在大湾构造三维地震资料目标处理中,通过采用初至波层析成像静校正技术、三维F-X相干燥音压制、三维叠后一步法偏移等技术与方法,使飞仙关组储层得到了较为清晰的成像效果。
In complex mountains,their topography is characterized by violent change and low-velocity layer with large variation.At present,complex mountains become a processing difficulty of seismic target waiting for being solved.An exploration to Dawan Structure of Puguang gasfield illustrates that in complex mountains,the key problems of target processing to 3D seismic data include static correction,noise attenuation,consistency of both power and frequency,accurate acquisition of velocity along with wave-field complexity.In the target processing of Dawan Structure,some technologies,including first-break tomographic image static correction,3D F-X coherent noise attenuation,3D prestack one-pass migration,have been applied to Feixianguang reservoir and a clear image effect has been obtained.
In complex mountains,their topography is characterized by violent change and low-velocity layer with large variation.At present,complex mountains become a processing difficulty of seismic target waiting for being solved.An exploration to Dawan Structure of Puguang gasfield illustrates that in complex mountains,the key problems of target processing to 3D seismic data include static correction,noise attenuation,consistency of both power and frequency,accurate acquisition of velocity along with wave-field complexity.In the target processing of Dawan Structure,some technologies,including first-break tomographic image static correction,3D F-X coherent noise attenuation,3D prestack one-pass migration,have been applied to Feixianguang reservoir and a clear image effect has been obtained.
引文
[1]胡伟光,王银,肖继林.叠前地震资料与油气藏预测[J].南方油气,2009,21(1):48-52.
[2]王银.川东北元坝地区生物礁的识别与追踪[J].天然气技术,2009,3(4):25-29.
[3]马在田.三维地震勘探方法[M].北京:石油工业出版社,1989.
[2]王银.川东北元坝地区生物礁的识别与追踪[J].天然气技术,2009,3(4):25-29.
[3]马在田.三维地震勘探方法[M].北京:石油工业出版社,1989.
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