广西桂中坳陷喀斯特地形地震采集方法探讨
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摘要
广西桂中坳陷地表喀斯特地形地貌发育,地表条件及地下地质构造复杂多变,大部分为灰岩出露,岩溶、裂缝发育,导致激发及接收条件差、原始资料信噪比低、静校正问题突出,地震波场复杂,构造成像困难。针对该区地表及地下复杂地质情况,采取4种技术措施:①面向目标的观测系统设计;②干扰波特性分析及压制方法;③加强炮检点的野外选点,加大试验力度,选取适合的激发和接收参数;④多种针对性的静校正处理方法。通过以上技术措施大大提高了资料信噪比,改善了资料的品质。
Karst topography is common in Guizhong depression in Guangxi. Near surface and subsurface structure are varied, and limestone are cropped out. Wide distribution of caves and fractures result in difficulties in shooting and receiving of seismic waves, poor quality of raw seismic data, serious static problem, complex wavefield, and difficulties in imaging of structures. 4 measures were proposed: target-oriented layout design, investigation and suppression of interferences, optimization of shot and receiving points and shot and receiving parameters, and pertinent static correction. Desired results have been yielded by the application of the proposed measures.
Karst topography is common in Guizhong depression in Guangxi. Near surface and subsurface structure are varied, and limestone are cropped out. Wide distribution of caves and fractures result in difficulties in shooting and receiving of seismic waves, poor quality of raw seismic data, serious static problem, complex wavefield, and difficulties in imaging of structures. 4 measures were proposed: target-oriented layout design, investigation and suppression of interferences, optimization of shot and receiving points and shot and receiving parameters, and pertinent static correction. Desired results have been yielded by the application of the proposed measures.
引文
1李林新.南方海相碳酸盐岩油气区地震采集面临的问题与对策[J].石油物探,2005,44(5):529~537
2郑国庆,吴树奎,何新平,等.川东北通南巴灰岩地区地震勘探采集技术探讨[J].石油物探,2005,44(2):175~178
3Palaz I,Marfurt KJ主编.碳酸盐岩地震学[M].中国石油物探专业委员会译.北京:石油工业出版社,1998.280~309
4李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993.107~109
5杨雄,刘泰生,刘斌.碳酸盐岩地区地震采集方法研究[J].石油物探,2003,42(3):361~364
6陆孟基.地震勘探原理[M].东营:石油大学出版社,1993.149~151
7邱华,苏丕波.四川盆地海相碳酸岩油气勘探采集技术探讨[J].内蒙古石油化工,2008(1):141~143
8徐建斌,李学义,青銮文,等.四川碳酸盐岩山地地震勘探综述[J].石油地球物理勘探,2000,35(3):119~127
2郑国庆,吴树奎,何新平,等.川东北通南巴灰岩地区地震勘探采集技术探讨[J].石油物探,2005,44(2):175~178
3Palaz I,Marfurt KJ主编.碳酸盐岩地震学[M].中国石油物探专业委员会译.北京:石油工业出版社,1998.280~309
4李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993.107~109
5杨雄,刘泰生,刘斌.碳酸盐岩地区地震采集方法研究[J].石油物探,2003,42(3):361~364
6陆孟基.地震勘探原理[M].东营:石油大学出版社,1993.149~151
7邱华,苏丕波.四川盆地海相碳酸岩油气勘探采集技术探讨[J].内蒙古石油化工,2008(1):141~143
8徐建斌,李学义,青銮文,等.四川碳酸盐岩山地地震勘探综述[J].石油地球物理勘探,2000,35(3):119~127
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