渤海海域锦州25-1油田地震勘探技术难点及对策
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摘要
针对辽西低凸起古近系圈闭地震研究中存在的几个技术难点提出了相应的研究路线,实现了对该区构造和储层的精细描述。研究以先进的综合地震工作站为平台,以地震解释为中心,与地质、测井研究密切配合,应用多项地震勘探新技术对地震数据体进行分析研究。应用地震地质多信息综合标定技术,实现了地震层位的精确标定;基于地质模型约束的变层速度模型保证了时深转换的准确性;虚拟现实与三维可视化技术相结合的全三维地震解释贯穿地震研究的全过程;以运用基于自组织人工神经网络分析(SOM)和主成分分析(PCA)的地震相分析技术对地震属性及所反映的地质特征进行分析解释,得到与地震相相对应的沉积相,大大提高了储层研究的精确度和可信度。锦州25区实际钻探结果表明所提出的几种技术方法组合能够有效地解决该区地球物理研究中存在的主要问题。
A new approach for eliminating multiples is proposed in this paper.The approach is based upon the combination of the events realigning with the singular value decomposition(SVD)technology.The process of our approach to suppress multiples is as follows:(1)track reverberations via accurate ray tracing and divide the shot gather into different reasonable time windows according to the traced time-distance curves of reverberations.Within each time window,the multiple events are aligned to be horizontally flat.(2)filter out reverberations with SVD technology.(3)re-align the filtered data back to the original shot gather.Remove all reverberations tracked by ray tracing,and then,we can complete the multiple attenuation.Compared to conventional methods,our approach takes the mechanism of multiples into account adequately and requires no model.Further more,we can remove the multiples directly in shot gather without analyzing the velocity spectrum jumbled by multiples.The processing of synthetic and real examples clearly demonstrates the validity of the technology presented in this thesis.
A new approach for eliminating multiples is proposed in this paper.The approach is based upon the combination of the events realigning with the singular value decomposition(SVD)technology.The process of our approach to suppress multiples is as follows:(1)track reverberations via accurate ray tracing and divide the shot gather into different reasonable time windows according to the traced time-distance curves of reverberations.Within each time window,the multiple events are aligned to be horizontally flat.(2)filter out reverberations with SVD technology.(3)re-align the filtered data back to the original shot gather.Remove all reverberations tracked by ray tracing,and then,we can complete the multiple attenuation.Compared to conventional methods,our approach takes the mechanism of multiples into account adequately and requires no model.Further more,we can remove the multiples directly in shot gather without analyzing the velocity spectrum jumbled by multiples.The processing of synthetic and real examples clearly demonstrates the validity of the technology presented in this thesis.
引文
[1]Sheriff R E,Geldart L P.勘探地震学[M].初英等,译.北京:石油工业出版社,1999.
[2]陆基梦.地震勘探原理[M].东营:石油大学出版社,1993.
[3]孙振涛,孟宪军,慎国强,等.高精度合成地震记录制作技术研究[J].石油地球物理勘探,2002,37(6):640-643.
[4]靳玲,苏桂芝,刘桂兰,等.合成地震记录制作的影响因素及对策[J].石油物探,2004,43(3):266-269.
[5]Bahorich M S,Bridges S L.3-D seismic coherency for faults and Stratigraphic features[J].The Leading Edge,1995,14(10):1 053-1 058.
[6]Marfurt K J,Sudhakar V,Gersztenkorn A,et al.Coherency calculations in the presence of structure dip[J].Geophysics,1999,64(1):104-111.
[7]Geoffrey A D.Visualization in 3-D seismic interpretation[J].The Leading Edge,1995,53:1 045-1 049.
[8]王咸彬.真(全)三维构造解释技术初探[J].石油物探,2000,39(2):90-94.
[9]刘兵,刘怀山,姜绍辉.虚拟现实技术在石油勘探开发中的应用[J].西北地质,2004,37(4):107-112.
[10]杨智仁.四川东部高陡构造归位处理研究[J].石油物探,1991,30(4):1-11.
[11]满益志,黄录中,苏永斌,等.模型分析成图技术在山前高陡构造区的应用[J].石油地球物理勘探,2002,37(增刊):125-127.
[12]张华军,肖富森,刘定锦,等.地质构造约束层速度模型在时深转换中的应用[J].石油物探,2003,42(4):521-525.
[13]程耀清,蔡冬梅.地震相技术应用实例[J].油地球物理勘探,2007,42(增刊):79-82.
[14]包约翰.自适应模式识别与神经网络[M].北京:科技出版社,1992.
[15]帕拉代姆公司.Stratimagic/Seisfacies 3.0培训手册[R].2005.
[2]陆基梦.地震勘探原理[M].东营:石油大学出版社,1993.
[3]孙振涛,孟宪军,慎国强,等.高精度合成地震记录制作技术研究[J].石油地球物理勘探,2002,37(6):640-643.
[4]靳玲,苏桂芝,刘桂兰,等.合成地震记录制作的影响因素及对策[J].石油物探,2004,43(3):266-269.
[5]Bahorich M S,Bridges S L.3-D seismic coherency for faults and Stratigraphic features[J].The Leading Edge,1995,14(10):1 053-1 058.
[6]Marfurt K J,Sudhakar V,Gersztenkorn A,et al.Coherency calculations in the presence of structure dip[J].Geophysics,1999,64(1):104-111.
[7]Geoffrey A D.Visualization in 3-D seismic interpretation[J].The Leading Edge,1995,53:1 045-1 049.
[8]王咸彬.真(全)三维构造解释技术初探[J].石油物探,2000,39(2):90-94.
[9]刘兵,刘怀山,姜绍辉.虚拟现实技术在石油勘探开发中的应用[J].西北地质,2004,37(4):107-112.
[10]杨智仁.四川东部高陡构造归位处理研究[J].石油物探,1991,30(4):1-11.
[11]满益志,黄录中,苏永斌,等.模型分析成图技术在山前高陡构造区的应用[J].石油地球物理勘探,2002,37(增刊):125-127.
[12]张华军,肖富森,刘定锦,等.地质构造约束层速度模型在时深转换中的应用[J].石油物探,2003,42(4):521-525.
[13]程耀清,蔡冬梅.地震相技术应用实例[J].油地球物理勘探,2007,42(增刊):79-82.
[14]包约翰.自适应模式识别与神经网络[M].北京:科技出版社,1992.
[15]帕拉代姆公司.Stratimagic/Seisfacies 3.0培训手册[R].2005.
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