基于CMP直线分布的不规则观测系统设计方法研究
|
摘要
我国南方海相碳酸盐岩油气区及西部前陆盆地边缘探区,均面临着地表起伏剧烈和地下构造高陡的双复杂地震勘探问题。为了准确勘查地下构造形态,野外地震采集中应尽可能降低起伏地表的复杂性及优选最佳的激发参数,从而获得高信噪比的地震单炮记录。在保证沟谷平坦区有利激发的前提下,通过最优化反演进行弯曲接收排列的设计,使得最终得到的二维地震剖面具有直线反射面元的特征,通过加入局部宽线的采集措施,使弯线地震采集的每个中心面元的覆盖次数和炮检距能够均匀分布。进行了四川盆地东北部镇巴地区复杂山地不规则观测系统的设计和属性分析,证明了基于CMP直线分布的不规则观测系统设计方法具有很好的实际应用价值。
At the marine carbonate area of Southern China and the foreland basin edge of Western china,severe rugged surface and high-steep subsurface structures are the double-complex area for seismic exploration.In order to obtain accurate subsurface structure configuration, we should try our best to decrease the complexity of rugged surface and select optimal shooting parameters so as to obtain high S/N seismic records.On the premise of beneficial shooting at flatten area in gully,the crooked-line survey was designed by optimal inversion,which made the 2-D seismic sections with linear reflection bins.The application of local wide-line assured the even distribution of fold and offset of every central bin acquired by crookedline survey.We carried out irregular geometry design and attribute analysis in the complex mountainous area at Zhenba area in the Northeast of Sichuan Basin,and the result proofed that the irregular design based on linear CMP distribution is flexible.
At the marine carbonate area of Southern China and the foreland basin edge of Western china,severe rugged surface and high-steep subsurface structures are the double-complex area for seismic exploration.In order to obtain accurate subsurface structure configuration, we should try our best to decrease the complexity of rugged surface and select optimal shooting parameters so as to obtain high S/N seismic records.On the premise of beneficial shooting at flatten area in gully,the crooked-line survey was designed by optimal inversion,which made the 2-D seismic sections with linear reflection bins.The application of local wide-line assured the even distribution of fold and offset of every central bin acquired by crookedline survey.We carried out irregular geometry design and attribute analysis in the complex mountainous area at Zhenba area in the Northeast of Sichuan Basin,and the result proofed that the irregular design based on linear CMP distribution is flexible.
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和对策[J].石油物探,2005,44(5):529-537
[2]杨贵祥.碳酸盐岩裸露区地震勘探采集方法[J].地球物理学进展,2005,20(4):1108-1128
[3]朱铉,杨贵祥,敬朋贵.二次创业与南方海相碳酸盐岩油气勘探的发现与展望[J].地球物理学进展, 2007,22(4):1255-1268
[4]云美厚,宋玉龙,丁伟,等.镇巴复杂山地地震成像质量影响因素及对策[J].勘探地球物理进展,2006,29 (1):42-47
[5]丁伟.镇巴复杂山地地震采集质量影响因素分析[J].石油物探,2006,45(4):418-422
[6]Nedimovic' M R,West G F.Crooked-line 2D seismic reflection imaging in crystalline terrains[J].Geophysics, 2003,68(1):274-296
[7]Schmelzbach C,Juhlin C,Carbonell R,et al.Prestack and poststack migration of crooked-line seismic reflection data:a case study from the South Portuguese Zone fold belt,southwestern Iberia[]J].Geophysics, 2007,72(2):B9-B18
[8]王永奎,殷全增,李攀峰.地震弯线技术在地形复杂地区煤田勘探中的应用[J].中国煤田地质,2010,22 (5):59-62
[9]唐汉平.黄土塬区地震勘探方法与效果分析[J].煤炭科学技术,2010,38(2):97-100
[10]李倩秀,张忠喜,王双双.地震弯线自由网在复杂山区勘探中的应用[J].陕西煤炭,2008,27(6):68-70
[11]郭良红,田小平.黄土塬区煤田弯线地震勘探采集技术的应用[J].中国煤田地质,2006,18(6):43-45
[12]Lindsey J P.Crooked lines and taboo places:what are the rules that govern good line layout?[J].The Leading Edge,1991,10(11):74-77
[13]Maclean G,Marfurt K J,Gray S H.Crooked line, rough topography:advancing towards the correct seismic image[J].Geophysical Prospecting,1999,47 (5):721-734
[14]Wu J J.Potential pitfalls of crooked-line seismic reflection surveys[J].Geophysics,1996,61(1): 277-281
[15]翟桐立,刘次源,祝文亮,等.南方山地宽线地震采集方法与效果[J].天然气工业,2007,27(增刊A):70-71
[16]刘依谋,梁向豪,黄有辉,等.库车坳陷复杂山地宽线采集技术及应用效果[J].石油物探,2008,47(4): 418-424
[17]董良国,吴晓峰,唐海忠,等.逆掩推覆构造的地震波照明与观测系统设计[J].石油物探,2006,45(1): 40-47
[2]杨贵祥.碳酸盐岩裸露区地震勘探采集方法[J].地球物理学进展,2005,20(4):1108-1128
[3]朱铉,杨贵祥,敬朋贵.二次创业与南方海相碳酸盐岩油气勘探的发现与展望[J].地球物理学进展, 2007,22(4):1255-1268
[4]云美厚,宋玉龙,丁伟,等.镇巴复杂山地地震成像质量影响因素及对策[J].勘探地球物理进展,2006,29 (1):42-47
[5]丁伟.镇巴复杂山地地震采集质量影响因素分析[J].石油物探,2006,45(4):418-422
[6]Nedimovic' M R,West G F.Crooked-line 2D seismic reflection imaging in crystalline terrains[J].Geophysics, 2003,68(1):274-296
[7]Schmelzbach C,Juhlin C,Carbonell R,et al.Prestack and poststack migration of crooked-line seismic reflection data:a case study from the South Portuguese Zone fold belt,southwestern Iberia[]J].Geophysics, 2007,72(2):B9-B18
[8]王永奎,殷全增,李攀峰.地震弯线技术在地形复杂地区煤田勘探中的应用[J].中国煤田地质,2010,22 (5):59-62
[9]唐汉平.黄土塬区地震勘探方法与效果分析[J].煤炭科学技术,2010,38(2):97-100
[10]李倩秀,张忠喜,王双双.地震弯线自由网在复杂山区勘探中的应用[J].陕西煤炭,2008,27(6):68-70
[11]郭良红,田小平.黄土塬区煤田弯线地震勘探采集技术的应用[J].中国煤田地质,2006,18(6):43-45
[12]Lindsey J P.Crooked lines and taboo places:what are the rules that govern good line layout?[J].The Leading Edge,1991,10(11):74-77
[13]Maclean G,Marfurt K J,Gray S H.Crooked line, rough topography:advancing towards the correct seismic image[J].Geophysical Prospecting,1999,47 (5):721-734
[14]Wu J J.Potential pitfalls of crooked-line seismic reflection surveys[J].Geophysics,1996,61(1): 277-281
[15]翟桐立,刘次源,祝文亮,等.南方山地宽线地震采集方法与效果[J].天然气工业,2007,27(增刊A):70-71
[16]刘依谋,梁向豪,黄有辉,等.库车坳陷复杂山地宽线采集技术及应用效果[J].石油物探,2008,47(4): 418-424
[17]董良国,吴晓峰,唐海忠,等.逆掩推覆构造的地震波照明与观测系统设计[J].石油物探,2006,45(1): 40-47
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心